GERM Reservoir Database
Development and Maintenance by the EarthRef.org Database Team

GERM Database Search Results        
Reservoir Z Element Value Median SD Low High N Unit Info Reference Source(s)
Active Continental Rifts 82 Pb 6.6           ppm Lower crustal rocks are combined in proportions as indicated in Figure 2. Average compositions were calculated using mafic granulitic xenoliths since these xenoliths are believed to represent the lowermost continental crust. Rudnick & Fountain 1995
Active Continental Rifts 82 Pb 13.6           ppm Rudnick & Fountain 1995
Alaska Trench   206Pb/204Pb 18.94             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 3 or moderate. Plank & Langmuir 1998
Alaska Trench   207Pb/204Pb 15.614             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 3 or moderate. Plank & Langmuir 1998
Alaska Trench   208Pb/204Pb 38.641             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 3 or moderate. Plank & Langmuir 1998
Alaska Trench 82 Pb 10.08           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 3 or moderate. Plank & Langmuir 1998
Alborz Mountains 82 Pb 180         3 ppm Phosphorite sandstones, quartzose and ferruginous, in sequence of phosphatic black shales, sandstones and limestones, platform setting, P2O5: 24-28% from the Alborz Mountains, Iran. Detection Limit = 1 ppm. Altschuller 1980 Aval et al. 1968
Aleutian Basalts   206Pb/204Pb 18.69         14   Average major and trace element values for Aleutian Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Aleutian Basalts   207Pb/204Pb 15.53         14   Average major and trace element values for Aleutian Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Aleutian Basalts   208Pb/204Pb 38.2         14   Average major and trace element values for Aleutian Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Aleutian Basalts 82 Pb 3.95         10 ppm Average major and trace element values for Aleutian Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Aleutian Trench   206Pb/204Pb 19.042             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Aleutian Trench   207Pb/204Pb 15.626             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Aleutian Trench   208Pb/204Pb 38.686             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Aleutian Trench 82 Pb 12.91           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
ALH 84001 Meteorite 82 Pb 72           ppm Mars elemental abundances as given by ALH84001 meteorite, which is an orthopyroxenite, as given in Lodders 1988. McSween, Jr. 2004 Lodders 1998
Amazon River Particulates 82 Pb 105           µg/g Elemental particulates in major South American rivers. Averages for major elements are weighted according to the suspended load prior to the construction of dams, for trace elements the average contents are mean values. Martin & Meybeck 1979
Amour River Particulates 82 Pb 307           µg/g Elemental particulates in major African rivers. Averages for major elements are weighted according to the suspended load prior to the construction of dams, for trace elements the average contents are mean values. Martin & Meybeck 1979
Amphibolites 82 Pb 12.7         189 ppm Average of 165 subsamples and 24 composites. Gao et al. 1998
Andaman Trench 82 Pb 17.78           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Andean Andesites 82 Pb 12           ppm Minor element values of the post Archaean Middle and Lower continental crust as estimated by Bailey 1981. The composition of the crust itself is found to be that of an average continental margin orogenic andesite. The trace element data are from the analyses of Bailey pertaining to Andean Andesite. Weaver & Tarney 1984 Bailey 1981
Andes Basalt   206Pb/204Pb 18.5         5   Average major and trace element values for Andean Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Andes Basalt   207Pb/204Pb 15.61         5   Average major and trace element values for Andean Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Andes Basalt   208Pb/204Pb 38.73         5   Average major and trace element values for Andean Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Andes Basalt 82 Pb 7.21         19 ppm Average major and trace element values for Andean Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Andesites   206Pb/204Pb 18.3         18   Average major and trace element values from Primitive Aleutian Arc Andesites given by Kelemen et al. 2004. All major element oxide values are given in wt. % and trace elements in ppm. Kelemen et al. 2004
Andesites   206Pb/204Pb 18.944         50   Average values of Aleutian Andeiste isotopic ratios taken from Plank and Langmuir 1988. Andesite was used in this case to correct for the ash layer which was omitted from sampling of the upper unit of the Aleutian trench. Plank & Langmuir 1998 Plank & Langmuir 1988
Andesites   207Pb/204Pb 15.47         18   Average major and trace element values from Primitive Aleutian Arc Andesites given by Kelemen et al. 2004. All major element oxide values are given in wt. % and trace elements in ppm. Kelemen et al. 2004
Andesites   207Pb/204Pb 15.623         50   Average values of Aleutian Andeiste isotopic ratios taken from Plank and Langmuir 1988. Andesite was used in this case to correct for the ash layer which was omitted from sampling of the upper unit of the Aleutian trench. Plank & Langmuir 1998 Plank & Langmuir 1988
Andesites   208Pb/204Pb 37.76         18   Average major and trace element values from Primitive Aleutian Arc Andesites given by Kelemen et al. 2004. All major element oxide values are given in wt. % and trace elements in ppm. Kelemen et al. 2004
Andesites   208Pb/204Pb 38.631         50   Average values of Aleutian Andeiste isotopic ratios taken from Plank and Langmuir 1988. Andesite was used in this case to correct for the ash layer which was omitted from sampling of the upper unit of the Aleutian trench. Plank & Langmuir 1998 Plank & Langmuir 1988
Andesites 82 Pb 20           ppm Condie 1993
Andesites 82 Pb 20           ppm Condie 1993
Andesites 82 Pb 20           ppm Condie 1993
Andesites 82 Pb 20           ppm Condie 1993
Andesites 82 Pb 4.9         50 ppm Average Aleutian Andeiste major and minor element composition taken from Plank and Langmuir 1988. Andesite was used in this case to correct for the ash layer which was omitted from sampling of the upper unit of the Aleutian trench. Plank & Langmuir 1998 Plank & Langmuir 1988
Andesites 82 Pb 20           ppm Condie 1993
Andesites 82 Pb 20           ppm Condie 1993
Andesites 82 Pb 4.7         13 ppm Average major and trace element values from Primitive Aleutian Arc Andesites given by Kelemen et al. 2004. All major element oxide values are given in wt. % and trace elements in ppm. Kelemen et al. 2004
Andesites 82 Pb 20           ppm Condie 1993
Archean Amphibolites 82 Pb 22           ppm Middle crust compositon based on Weaver and Tarney 1981. According to this study the middle crustal composition is that of Archean Lewisian amphibolite facies gneisses. Weaver & Tarney 1984 Weaver & Tarney 1981
Archean Lower Crust 82 Pb 13           ppm Archean Lower Continental Crust composition as offered by Weaver and Tarney 1984. Also one of many models of LCC composition to compare current analyses, yet gives a good lower marker for some of the major and minor consitutents of LCC. Shaw et al. 1986 Weaver & Tarney 1984
Archean Terrains 82 Pb 8.5           ppm Rudnick & Fountain 1995
Arenaceous Rocks 82 Pb 25.8         2754 ppm Average of 2628 subsamples and 126 composites. Gao et al. 1998
Arenaceous Rocks 82 Pb 18         121 ppm Average of 110 subsamples and 11 composites. Gao et al. 1998
Ashy Clay 82 Pb 31.5         4 ppm Average of 4 ashy clays after Peate et al. (1997) that have been diluted by the percentages of pure SiO2 and CaCO3 in the drill cores. The biogenic diluent is minor at 1.7% pure silica and 2.5% CaCO3 in this 85 m deep unit. Plank & Langmuir 1998
Australian Granite 82 Pb 17         6 ppm Analysis of A-type Padthaway Granite represented in major and minor element abundances as well as slected trace element ratios given by Martin 1995 but plotted in Figure 5 of Kemp & Hawkesworth 2004. Kemp & Hawkesworth 2004 Turner et al. 1992
Australian Granite 82 Pb 19         1074 ppm Analysis of Lachlan Fold Belt Hornblende Granite represented in major and minor element abundances as well as slected trace element ratios given by Martin 1995 but plotted in Figure 5 of Kemp & Hawkesworth 2004. Kemp & Hawkesworth 2004 Wormald & Price 1988
Australian Granite 82 Pb 27         704 ppm Analysis of Lachlan Fold Belt Cordierite Granite represented in major and minor element abundances as well as slected trace element ratios given by Martin 1995 but plotted in Figure 5 of Kemp & Hawkesworth 2004. Kemp & Hawkesworth 2004 Chappell & White 1992
Australian Granite 82 Pb 5         8 ppm Analysis of Oceanic Arc Granite represented in major and minor element abundances as well as slected trace element ratios given by Martin 1995 but plotted in Figure 5 of Kemp & Hawkesworth 2004. Kemp & Hawkesworth 2004 Whalen 1985
Australian Granite 82 Pb 80         13 ppm Analysis of Himalayan Leucogranite represented in major and minor element abundances as well as slected trace element ratios given by Martin 1995 but plotted in Figure 5 of Kemp & Hawkesworth 2004. Kemp & Hawkesworth 2004 Inger & Harris 1993
Australian Granite 82 Pb 22           ppm Analysis of A-type Lachlan Fold Belt Granite represented in major and minor element abundances as well as slected trace element ratios given by Martin 1995 but plotted in Figure 5 of Kemp & Hawkesworth 2004. Kemp & Hawkesworth 2004 Collins et al. 1982
Bambui Group 82 Pb 20         14 ppm Silty and clayey pelletal phosphorites located in the intra-cratonic basin Bambui group Minas Geraes in Brazil. Detection Limit = 1 ppm. Altschuller 1980 Cathcart 1974
Basalts   206Pb/204Pb 19.423         7   Average major and trace element compositions for African Virunga V.F. High Ti Cenozoic continental potassic alkali basalt along with selected elemental and isotopic ratio abundances associated with these provinces. Farmer 2004 Rogers et al. 1998
Basalts   206Pb/204Pb 18.533         8   Average major and trace element values for Vietnamese Tholeiitic Basalts as well as selected elemental and isotopic ratios. Farmer 2004 Hoang & Flower 1998
Basalts   206Pb/204Pb 18.563         25   Average major and trace element values for Arabian Peninsula in Yemen Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Baker et al. 1997
Basalts   206Pb/204Pb 18.746         3   Average major and trace element values for Taiwanese Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Chung et al. 1995
Basalts   206Pb/204Pb 18.726         7   Average major and trace element values for SE Australian Newer V.P. Tholeiitic Basalts as well as selected elemental and isotopic ratios. Farmer 2004 Price et al. 1997
Basalts   206Pb/204Pb 18.139         4   Average major and trace element values for NE China Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Chung 1999
Basalts   206Pb/204Pb 19.566         27   Average major and trace element compositions for Western U.S. Sierra Nevada Low Ti Cenozoic continental potassic alkali basalt along with selected elemental and isotopic ratio abundances associated with these provinces. Farmer 2004 Farmer et al. 2002
Basalts   206Pb/204Pb 18.68         1   Average major and trace element compositions for Chinese Tibetan Plateau Low Ti Cenozoic continental potassic alkali basalt along with selected elemental and isotopic ratio abundances associated with these provinces. Farmer 2004 Turner et al. 1996a
Basalts   206Pb/204Pb 17.958         3   Average major and trace element values for Taos Plateau, Rio Grande Rift Tholeiitic Basalts as well as selected elemental and isotopic ratios. Farmer 2004 Dungan et al. 1986
Basalts   206Pb/204Pb 18.76             Average major and trace element compositions for Italian Roman V.F. Low Ti Cenozoic continental potassic alkali basalt along with selected elemental and isotopic ratio abundances associated with these provinces. Farmer 2004 Conticelli et al. 1997
Basalts   206Pb/204Pb 19.255         19   Average major and trace element values for N. Tanzania-East African Rift Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Paslick et al. 1995
Basalts   207Pb/204Pb 15.584         25   Average major and trace element values for Arabian Peninsula in Yemen Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Baker et al. 1997
Basalts   207Pb/204Pb 15.568         3   Average major and trace element values for Taiwanese Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Chung et al. 1995
Basalts   207Pb/204Pb 15.587         19   Average major and trace element values for N. Tanzania-East African Rift Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Paslick et al. 1995
Basalts   207Pb/204Pb 15.507         4   Average major and trace element values for NE China Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Chung 1999
Basalts   207Pb/204Pb 15.594         8   Average major and trace element values for Vietnamese Tholeiitic Basalts as well as selected elemental and isotopic ratios. Farmer 2004 Hoang & Flower 1998
Basalts   207Pb/204Pb 15.72         27   Average major and trace element compositions for Western U.S. Sierra Nevada Low Ti Cenozoic continental potassic alkali basalt along with selected elemental and isotopic ratio abundances associated with these provinces. Farmer 2004 Farmer et al. 2002
Basalts   207Pb/204Pb 15.656         1   Average major and trace element compositions for Chinese Tibetan Plateau Low Ti Cenozoic continental potassic alkali basalt along with selected elemental and isotopic ratio abundances associated with these provinces. Farmer 2004 Turner et al. 1996a
Basalts   207Pb/204Pb 15.515         3   Average major and trace element values for Taos Plateau, Rio Grande Rift Tholeiitic Basalts as well as selected elemental and isotopic ratios. Farmer 2004 Dungan et al. 1986
Basalts   207Pb/204Pb 15.758         7   Average major and trace element compositions for African Virunga V.F. High Ti Cenozoic continental potassic alkali basalt along with selected elemental and isotopic ratio abundances associated with these provinces. Farmer 2004 Rogers et al. 1998
Basalts   207Pb/204Pb 15.62         7   Average major and trace element values for SE Australian Newer V.P. Tholeiitic Basalts as well as selected elemental and isotopic ratios. Farmer 2004 Price et al. 1997
Basalts   208Pb/204Pb 39.015         1   Average major and trace element compositions for Chinese Tibetan Plateau Low Ti Cenozoic continental potassic alkali basalt along with selected elemental and isotopic ratio abundances associated with these provinces. Farmer 2004 Turner et al. 1996a
Basalts   208Pb/204Pb 39.645         19   Average major and trace element values for N. Tanzania-East African Rift Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Paslick et al. 1995
Basalts   208Pb/204Pb 38.859         3   Average major and trace element values for Taiwanese Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Chung et al. 1995
Basalts   208Pb/204Pb 37.482         3   Average major and trace element values for Taos Plateau, Rio Grande Rift Tholeiitic Basalts as well as selected elemental and isotopic ratios. Farmer 2004 Dungan et al. 1986
Basalts   208Pb/204Pb 38.233         4   Average major and trace element values for NE China Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Chung 1999
Basalts   208Pb/204Pb 38.624         25   Average major and trace element values for Arabian Peninsula in Yemen Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Baker et al. 1997
Basalts   208Pb/204Pb 39.197         27   Average major and trace element compositions for Western U.S. Sierra Nevada Low Ti Cenozoic continental potassic alkali basalt along with selected elemental and isotopic ratio abundances associated with these provinces. Farmer 2004 Farmer et al. 2002
Basalts   208Pb/204Pb 38.84         7   Average major and trace element values for SE Australian Newer V.P. Tholeiitic Basalts as well as selected elemental and isotopic ratios. Farmer 2004 Price et al. 1997
Basalts   208Pb/204Pb 40.746         7   Average major and trace element compositions for African Virunga V.F. High Ti Cenozoic continental potassic alkali basalt along with selected elemental and isotopic ratio abundances associated with these provinces. Farmer 2004 Rogers et al. 1998
Basalts   208Pb/204Pb 38.588         8   Average major and trace element values for Vietnamese Tholeiitic Basalts as well as selected elemental and isotopic ratios. Farmer 2004 Hoang & Flower 1998
Basalts 82 Pb 6.9         16 ppm Average major and trace element compositions for African Virunga V.F. High Ti Cenozoic continental potassic alkali basalt along with selected elemental and isotopic ratio abundances associated with these provinces. Farmer 2004 Rogers et al. 1998
Basalts 82 Pb 5.9         23 ppm Average major and trace element values for N. Tanzania-East African Rift Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Paslick et al. 1995
Basalts 82 Pb 3.4         7 ppm Average major and trace element values for SE Australian Newer V.P. Tholeiitic Basalts as well as selected elemental and isotopic ratios. Farmer 2004 Price et al. 1997
Basalts 82 Pb 2.45         44 ppm Average major and trace element values for Arabian Peninsula in Yemen Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Baker et al. 1997
Basalts 82 Pb 5.59         4 ppm Average major and trace element values for NE China Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Chung 1999
Basalts 82 Pb 6           ppm Condie 1993
Basalts 82 Pb 6           ppm Condie 1993
Basalts 82 Pb 6           ppm Condie 1993
Basalts 82 Pb 6           ppm Condie 1993
Basalts 82 Pb 6           ppm Condie 1993
Basalts 82 Pb 5           ppm Condie 1993
Basalts 82 Pb 5           ppm Condie 1993
Basalts 82 Pb 18.2         27 ppm Average major and trace element compositions for Western U.S. Sierra Nevada Low Ti Cenozoic continental potassic alkali basalt along with selected elemental and isotopic ratio abundances associated with these provinces. Farmer 2004 Farmer et al. 2002
Basalts 82 Pb 22.9         10 ppm Average major and trace element compositions for Taiwanese Mt. Tsaoling Low Ti Cenozoic continental potassic alkali basalt along with selected elemental and isotopic ratio abundances associated with these provinces. Farmer 2004 Chung et al. 2001
Basalts 82 Pb 30         6 ppm Average major and trace element compositions for Chinese Tibetan Plateau Low Ti Cenozoic continental potassic alkali basalt along with selected elemental and isotopic ratio abundances associated with these provinces. Farmer 2004 Turner et al. 1996a
Basic Precambrian Granulites 82 Pb 12         25 ppm Shaw et al. 1986
Battle Creek Formation 82 Pb 40         17 ppm Cherty and calcareous pelletal phosphorites, located in the intra-cratonic basin Battle Cratonic Formation (Georgina Basin), P2O5: 8-37% (mostly 24-37%). Detection Limit = 1 ppm. Altschuller 1980 De Keyser & Cook 1972
Battle Creek Formation 82 Pb 170         7 ppm Silty aphanitic phosphorites of the intra-cratonic Georgina Basin; Battle formation of Australia. Detection Limit = 1 ppm. Altschuller 1980 De Keyser & Cook 1972
Belkinsk Akai Sayan 82 Pb 40         33 ppm Calcareous phosphorites from the Altai-Sayan geosyncline Belkinsk Altai Sayan, Siberia. Detection Limit = 1 ppm. Altschuller 1980 Chaikina & Nikolskaya 1970
Bone Valley Formation 82 Pb 55         8 ppm Pebbly and pelletal phosphorite from sandy and clayey phosphorites reworked from phosphatic limestones and dolomites of the Hawthorn carbonate platform (Bone Valley Formation, Florida, U.S.A.); average eight composites: four pebble and four pellet concentrates composited from one week's production at each of four mining localities in Land Pebble Field, representative of approximately 100,000 tons, P2O5: 30-35%. Detection Limit = 1 ppm. Altschuller 1980
Boninites   206Pb/204Pb 18.68         37   Average major and trace element values from Primitive Arc Boninites (High-Mg Andesites) given by Kelemen et al. 2004. All major element oxide values are given in wt. % and trace elements in ppm. Kelemen et al. 2004
Boninites   207Pb/204Pb 15.53         37   Average major and trace element values from Primitive Arc Boninites (High-Mg Andesites) given by Kelemen et al. 2004. All major element oxide values are given in wt. % and trace elements in ppm. Kelemen et al. 2004
Boninites   208Pb/204Pb 38.31         37   Average major and trace element values from Primitive Arc Boninites (High-Mg Andesites) given by Kelemen et al. 2004. All major element oxide values are given in wt. % and trace elements in ppm. Kelemen et al. 2004
Boninites 82 Pb 1.83         15 ppm Average major and trace element values from Primitive Arc Boninites (High-Mg Andesites) given by Kelemen et al. 2004. All major element oxide values are given in wt. % and trace elements in ppm. Kelemen et al. 2004
Brown Clay 82 Pb 104.9         29 ppm The brown clay analyses where averaged over 10 m intervals and then averaged down-unit. Plank & Langmuir 1998
Brown Clay 82 Pb 131         4 ppm Average of 4 brown clays using DCP analyses. Plank & Langmuir 1998
Brown Rock 82 Pb 23         3 ppm Residually concentrated pelletal phosphorite from 'Brown Rock' Tennessee, U.S.A. Ordovician carbonate platform, decalcified during late Tertiary to Recent, P2O5 = 11, 27, 29%, samples include one production composite. Detection Limit = 1 ppm. Altschuller 1980
Carbonate   206Pb/204Pb 18.314         13   The average Ca-carbonate in this unit is 80% based on Leg 67 shipboard carbonate bomb analyses. The analyses have been adjusted accordingly for 45% CaO. Plank & Langmuir 1998
Carbonate   207Pb/204Pb 15.463         13   The average Ca-carbonate in this unit is 80% based on Leg 67 shipboard carbonate bomb analyses. The analyses have been adjusted accordingly for 45% CaO. Plank & Langmuir 1998
Carbonate   208Pb/204Pb 37.94         13   The average Ca-carbonate in this unit is 80% based on Leg 67 shipboard carbonate bomb analyses. The analyses have been adjusted accordingly for 45% CaO. Plank & Langmuir 1998
Carbonate 82 Pb 6.7         13 ppm The average Ca-carbonate in this unit is 80% based on Leg 67 shipboard carbonate bomb analyses. The analyses have been adjusted accordingly for 45% CaO. Plank & Langmuir 1998
Carbonate Turbidites 82 Pb 10         87 ppm Average of 87 Cenozoic carbonate turbidites in 100 m of the total of 500 m ODP section. Plank & Langmuir 1998
Carbonates 82 Pb 13.3         2038 ppm Average of 1922 subsamples and 116 composites. Gao et al. 1998
Carbonates 82 Pb 9.4         50 ppm Average of 45 subsamples and 5 composites. Gao et al. 1998
Cascade Basalt   206Pb/204Pb 18.94         26   Average major and trace element values for Cascades Arc Basalt given in weight percent and parts per million respectively. Kelemen et al. 2004
Cascade Basalt   207Pb/204Pb 15.62         26   Average major and trace element values for Cascades Arc Basalt given in weight percent and parts per million respectively. Kelemen et al. 2004
Cascade Basalt   208Pb/204Pb 38.61         26   Average major and trace element values for Cascades Arc Basalt given in weight percent and parts per million respectively. Kelemen et al. 2004
Cascade Basalt 82 Pb 2.26         10 ppm Average major and trace element values for Cascades Arc Basalt given in weight percent and parts per million respectively. Kelemen et al. 2004
Cascadia Trench   206Pb/204Pb 19.151             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Cascadia Trench   207Pb/204Pb 15.629             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Cascadia Trench   208Pb/204Pb 38.747             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Cascadia Trench 82 Pb 15.59           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Central America Trench   206Pb/204Pb 18.459             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Central America Trench   207Pb/204Pb 15.515             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Central America Trench   208Pb/204Pb 38.166             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Central America Trench 82 Pb 7.36           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Central American Basalts   206Pb/204Pb 19.02         21   Average major and trace element values for Central American Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Central American Basalts   207Pb/204Pb 15.56         21   Average major and trace element values for Central American Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Central American Basalts   208Pb/204Pb 38.68         21   Average major and trace element values for Central American Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Central American Basalts 82 Pb 1.4         26 ppm Average major and trace element values for Central American Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Central East China Craton   K/Pb 1200             Compostional estimate of the entire Central East China province. Gao et al. 1998
Central East China Craton   K/Pb 1100             Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average mafic granulite from Archean high-grade terrains in Central East China (Appendix 1). Gao et al. 1998
Central East China Craton   K/Pb 1200             Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average worldwide mafic granulite xenolith using the median values of Rudnick & Fountain (1995). Gao et al. 1998
Central East China Craton   K/Pb 1400             Compostional estimate of the entire Central East China province. Gao et al. 1998
Central East China Craton   K/Pb 1300             Compostional estimate of the entire Central East China province. Calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
Central East China Craton   K/Pb 1200             Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average worldwide mafic granulite xenolith using the median values of Rudnick & Fountain (1995). Gao et al. 1998
Central East China Craton   K/Pb 1200             Compostional estimate of the entire Central East China province. Calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
Central East China Craton   K/Pb 1200             Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average mafic granulite from Archean high-grade terrains in Central East China (Appendix 1). Gao et al. 1998
Central East China Craton 82 Pb 10           ppm Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average worldwide mafic granulite xenolith using the median values of Rudnick & Fountain (1995). Gao et al. 1998
Central East China Craton 82 Pb 16           ppm Compostional estimate of the entire Central East China province. Gao et al. 1998
Central East China Craton 82 Pb 13           ppm Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average mafic granulite from Archean high-grade terrains in Central East China (Appendix 1). Gao et al. 1998
Central East China Craton 82 Pb 18           ppm Compostional estimate of the entire Central East China province. Calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
Central East China Craton 82 Pb 15           ppm Compostional estimate of the entire Central East China province. Average composition of granulite terrains. Gao et al. 1998
Central East China Craton 82 Pb 15           ppm Average composition for Central East China. Assuming that the lowermost crust is represented by the average mafic granulite from Archean high-grade terrains in Central East China (Appendix 1). Gao et al. 1998
Central East China Craton 82 Pb 14           ppm Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average worldwide mafic granulite xenolith (Rudnick & Fountain, 1995). Gao et al. 1998
Central East China Craton 82 Pb 16           ppm Compostional estimate of the entire Central East China province. Average compostion of granulite terrains and calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
Central East China Craton 82 Pb 11           ppm Compostional estimate of the entire Central East China province. Calculated according to 70% intermediate granulite plus 15% mafic granulite plus 15% metapelite from central East China (Appendix 1; for detailed explanation see text). Gao et al. 1998
Central East China Craton 82 Pb 15           ppm Compostional estimate of the entire Central East China province. Gao et al. 1998
Central East China Craton 82 Pb 17           ppm Compostional estimate of the entire Central East China province. Includes sedimentary carbonates. Gao et al. 1998
Central East China Craton   Pb/Bi 30             Compostional estimate of the entire Central East China province. Gao et al. 1998
Central East China Craton   Pb/Bi 85             Compostional estimate of the entire Central East China province. Gao et al. 1998
Central East China Craton   Pb/Bi 79.1             Compostional estimate of the entire Central East China province. Calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
Central East China Craton   Pb/Bi 57             Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average mafic granulite from Archean high-grade terrains in Central East China (Appendix 1). Gao et al. 1998
Central East China Craton   Pb/Bi 55             Compostional estimate of the entire Central East China province. Calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
Central East China Craton   Pb/Bi 34             Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average mafic granulite from Archean high-grade terrains in Central East China (Appendix 1). Gao et al. 1998
Central East China Craton   U/Pb 0.07             Compostional estimate of the entire Central East China province. Gao et al. 1998
Central East China Craton   U/Pb 0.079             Compostional estimate of the entire Central East China province. Calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
Central East China Craton   U/Pb 0.077             Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average mafic granulite from Archean high-grade terrains in Central East China (Appendix 1). Gao et al. 1998
Central East China Craton   U/Pb 0.066             Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average mafic granulite from Archean high-grade terrains in Central East China (Appendix 1). Gao et al. 1998
Central East China Craton   U/Pb 0.087             Compostional estimate of the entire Central East China province. Calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
Central East China Craton   U/Pb 0.079             Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average worldwide mafic granulite xenolith using the median values of Rudnick & Fountain (1995). Gao et al. 1998
Central East China Craton   U/Pb 0.074             Compostional estimate of the entire Central East China province. Gao et al. 1998
Central East China Craton   U/Pb 0.072             Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average worldwide mafic granulite xenolith using the median values of Rudnick & Fountain (1995). Gao et al. 1998
Central East China Craton   ¿-Pb 4.4             Compostional estimate of the entire Central East China province. Gao et al. 1998
Central East China Craton   ¿-Pb 4.3             Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average worldwide mafic granulite xenolith using the median values of Rudnick & Fountain (1995). Gao et al. 1998
Central East China Craton   ¿-Pb 4.9             Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average worldwide mafic granulite xenolith using the median values of Rudnick & Fountain (1995). Gao et al. 1998
Central East China Craton   ¿-Pb 5.7             Compostional estimate of the entire Central East China province. Calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
Central East China Craton   ¿-Pb 4.8             Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average mafic granulite from Archean high-grade terrains in Central East China (Appendix 1). Gao et al. 1998
Central East China Craton   ¿-Pb 4             Compostional estimate of the entire Central East China province. Assuming that the lowermost crust is represented by the average mafic granulite from Archean high-grade terrains in Central East China (Appendix 1). Gao et al. 1998
Central East China Craton   ¿-Pb 5             Compostional estimate of the entire Central East China province. Calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
Chert   206Pb/204Pb 18.845         4   Average of 4 brown chert analyses. Due to the poor recovery of these notoriously hard chert beds, this chert section may be overdiluted by silica causing an underestimation of the geochemical abundances. The dilution factors have therefore been based on the down-core logging for SiO2 contents. Plank & Langmuir 1998
Chert   206Pb/204Pb 18.845         4   Average of 4 brown chert analyses. Due to the poor recovery of these notoriously hard chert beds, this chert section may be overdiluted by silica causing an underestimation of the geochemical abundances. The dilution factors have therefore been based on the down-core logging for SiO2 contents. Plank & Langmuir 1998
Chert   206Pb/204Pb 18.85             Isotopic estimates of the second of four layers from the sediment column of DSDP Leg 129's Hole 801. Isotopic ratios derived from several sources outside of this study. Elliot et al. 1997
Chert   207Pb/204Pb 15.68             Isotopic estimates of the second of four layers from the sediment column of DSDP Leg 129's Hole 801. Isotopic ratios derived from several sources outside of this study. Elliot et al. 1997
Chert   207Pb/204Pb 15.683         4   Average of 4 brown chert analyses. Due to the poor recovery of these notoriously hard chert beds, this chert section may be overdiluted by silica causing an underestimation of the geochemical abundances. The dilution factors have therefore been based on the down-core logging for SiO2 contents. Plank & Langmuir 1998
Chert   207Pb/204Pb 15.683         4   Average of 4 brown chert analyses. Due to the poor recovery of these notoriously hard chert beds, this chert section may be overdiluted by silica causing an underestimation of the geochemical abundances. The dilution factors have therefore been based on the down-core logging for SiO2 contents. Plank & Langmuir 1998
Chert   208Pb/204Pb 38.955         4   Average of 4 brown chert analyses. Due to the poor recovery of these notoriously hard chert beds, this chert section may be overdiluted by silica causing an underestimation of the geochemical abundances. The dilution factors have therefore been based on the down-core logging for SiO2 contents. Plank & Langmuir 1998
Chert   208Pb/204Pb 38.96             Isotopic estimates of the second of four layers from the sediment column of DSDP Leg 129's Hole 801. Isotopic ratios derived from several sources outside of this study. Elliot et al. 1997
Chert   208Pb/204Pb 38.955         4   Average of 4 brown chert analyses. Due to the poor recovery of these notoriously hard chert beds, this chert section may be overdiluted by silica causing an underestimation of the geochemical abundances. The dilution factors have therefore been based on the down-core logging for SiO2 contents. Plank & Langmuir 1998
Chert 82 Pb 4.2           ppm Compositional estimates of the second of four layers from the sediment column of DSDP Leg 129's Hole 801 according to the methods of Plank and Ludden 1992. Elliot et al. 1997
Chert 82 Pb 4.2         4 ppm Average of 4 brown chert analyses. Due to the poor recovery of these notoriously hard chert beds, this chert section may be overdiluted by silica causing an underestimation of the geochemical abundances. The dilution factors have therefore been based on the down-core logging for SiO2 contents. Plank & Langmuir 1998
Chert 82 Pb 3.8         4 ppm Average of 4 brown chert analyses. Due to the poor recovery of these notoriously hard chert beds, this chert section may be overdiluted by silica causing an underestimation of the geochemical abundances. The dilution factors have therefore been based on the down-core logging for SiO2 contents. Estimated value. Plank & Langmuir 1998
CI Chondrites 82 Pb 2430           ppb C1 Carbonaceous chondrite major and minor element compositions as given in Palme 1988. These values are given in an effort to accurately represent the C1 chondrites as based on an array of sources and derive a revised model for the composition of the Earth. McDonough & Sun 1995 Palme 1988
CI Chondrites 82 Pb 2400           ppb C1 Carbonaceous chondrite major and minor element compositions as given in Wasson & Kallemeyn 1988. These values are given in an effort to accurately represent the C1 chondrites as based on an array of sources and derive a revised model for the composition of the Earth. McDonough & Sun 1995 Wasson & Kallemeyn 1988
CI Chondrites 82 Pb 2.05   0.04         CI Meteorite derived solar system abundances of various elements. Palme & Jones 2004
CI Chondrites 82 Pb 2470           ppb Based on measurements on 3 out of 5 carbonaceous chrondrites namely Orgueil, Ivuna and Alais. McDonough & Sun 1995
CI Chondrites 82 Pb 2.47           ppm Abundance of elements in the solar system from Anders & Grevesse 1989 study of CI meteorites. Palme & Jones 2004 Anders & Grevesse 1989
CI Chondrites 82 Pb 2530   253       ppb Composition of the Primitive Mantle of the Earth as based on CI Chondritic major and trace element compositions from Chapter 1.03 Palme & Jones 2004 Treatise of Geochemistry. Palme & O'Neill 2004 Palme & Jones 2004
CI Chondrites 82 Pb 2470   192.7     3 ppb Mean C1 chondrite from atomic abundances based on C = 3.788E-3*H*A where C = concentration; H = atomic abundance and A = atomic weight. Values are not normalised to 100% Anders & Grevesse 1989
CI Chondrites 82 Pb 2.53   0.253       ppm Abundance of elements in the solar system based off of Palme & Beer 1993 study of CI meteorites. Palme & Jones 2004 Palme & Beer 1993
Clastic Turbidites   206Pb/204Pb 19.151         28   In this homogeneous turbidite unit 28 analyses were used to calculate an average by weighting interval height and lithology. Proportions of sand, silt and clay were estimated from core descriptions. Plank & Langmuir 1998
Clastic Turbidites   207Pb/204Pb 15.629         28   In this homogeneous turbidite unit 28 analyses were used to calculate an average by weighting interval height and lithology. Proportions of sand, silt and clay were estimated from core descriptions. Plank & Langmuir 1998
Clastic Turbidites   208Pb/204Pb 38.747         28   In this homogeneous turbidite unit 28 analyses were used to calculate an average by weighting interval height and lithology. Proportions of sand, silt and clay were estimated from core descriptions. Plank & Langmuir 1998
Clastic Turbidites 82 Pb 15.6         28 ppm In this homogeneous turbidite unit 28 analyses were used to calculate an average by weighting interval height and lithology. Proportions of sand, silt and clay were estimated from core descriptions. Estimated value. Plank & Langmuir 1998
Colombia Trench 82 Pb 0.89           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 3 or moderate. Plank & Langmuir 1998
Congo River Particulates 82 Pb 455           µg/g Elemental particulates in major African rivers. Averages for major elements are weighted according to the suspended load prior to the construction of dams, for trace elements the average contents are mean values. Martin & Meybeck 1979
Continental Arc Andesite   206Pb/204Pb 18.75         76   Average major and trace element values for Average Continental Arc Basalt given in weight percent and parts per million respectively. Kelemen et al. 2004
Continental Arc Andesite   206Pb/204Pb 18.53         11   Average major and trace element values from Primitive Continental Arc Andesites given by Kelemen et al. 2004. All major element oxide values are given in wt. % and trace elements in ppm. Kelemen et al. 2004
Continental Arc Andesite   207Pb/204Pb 15.57         76   Average major and trace element values for Average Continental Arc Basalt given in weight percent and parts per million respectively. Kelemen et al. 2004
Continental Arc Andesite   207Pb/204Pb 15.56         11   Average major and trace element values from Primitive Continental Arc Andesites given by Kelemen et al. 2004. All major element oxide values are given in wt. % and trace elements in ppm. Kelemen et al. 2004
Continental Arc Andesite   208Pb/204Pb 38.46         75   Average major and trace element values for Average Continental Arc Basalt given in weight percent and parts per million respectively. Kelemen et al. 2004
Continental Arc Andesite   208Pb/204Pb 38.36         11   Average major and trace element values from Primitive Continental Arc Andesites given by Kelemen et al. 2004. All major element oxide values are given in wt. % and trace elements in ppm. Kelemen et al. 2004
Continental Arc Andesite 82 Pb 3.36         83 ppm Average major and trace element values for Average Continental Arc Basalt given in weight percent and parts per million respectively. Kelemen et al. 2004
Continental Arc Andesite 82 Pb 8.45         20 ppm Average major and trace element values from Primitive Continental Arc Andesites given by Kelemen et al. 2004. All major element oxide values are given in wt. % and trace elements in ppm. Kelemen et al. 2004
Continental Arcs 82 Pb 10.6           ppm Rudnick & Fountain 1995
Continental Arcs 82 Pb 2.8           ppm Lower crustal rocks are combined in proportions as indicated in Figure 2. Average compositions were calculated using mafic granulitic xenoliths since these xenoliths are believed to represent the lowermost continental crust. Rudnick & Fountain 1995
Continental Crust   206Pb/204Pb       18.04 18.35     Assuming 7 ppm Pb in lower crust and 15-20 ppm Pb in upper crust. Pb isotopic compositions for upper crust are 206Pb/204Pb = 18.76 and 207Pb/204Pb = 15.66 from Newsom et al. (1986) and the lower crust from models 1-4 in this Table. Rudnick & Goldstein 1990
Continental Crust   207Pb/204Pb       15.51 15.62     Assuming 7 ppm Pb in lower crust and 15-20 ppm Pb in upper crust. Pb isotopic compositions for upper crust are 206Pb/204Pb = 18.76 and 207Pb/204Pb = 15.66 from Newsom et al. (1986) and the lower crust from models 1-4 in this Table. Rudnick & Goldstein 1990
Continental Crust   Bi/Pb 0.0164             Elemental ratios as found in the Continental Crust according to Rudnick and Gao 2003.  As in the text these values are used as comparisons to the Elemental ratios found in Primitive Upper Mantle from McDonough and Sun 1995. Salters & Stracke 2004
Continental Crust 82 Pb 10           ppm Average crustal composition taken from Taylor and McLennan 1981. These values are referred to as the Andesite model and as compared to the values given by this study (Weaver & Tarney 1984) differs in only a handful of elements and ratios. The Andesite model is significantly less siliceous though, and also less correspondant to previous estimates of the Continental Crust. Weaver & Tarney 1984 Taylor & McLennan 1981
Continental Crust 82 Pb 14.8           ppm Major and minor element composition of the Continental Crust as based on the study by Wedepohl 1994. Major elements are given as Oxides whereas the minor elements are given in singularly in ppm. Rudnick & Fountain 1995 Wedepohl 1995
Continental Crust 82 Pb 15           ppm In calculating the average crustal composition it is assumed that the proportions of upper, middle and lower crust are 2:1:3. The upper crustal average from Taylor & McLennan (1981) is presumed to be representative of upper crust of all geological ages. The middel and lower crust are presumed to be composed of 75% Archean material and 25% post-Archean material represented by average orogenic andesites. Thus the relative weightings for upper crust, Archean middle crust, Archean lower crust and post-Archean middle and lower crust become 8:3:9:4. Weaver & Tarney 1984
Continental Crust 82 Pb 20           ppm Simple average between the LCC and UCC estimates. The LCC is based on the mean values of estimates of the regional abundances of high metamorphic grade Precambrian rock types ad divided by SiO2 contents into ultrabasis, basic, intermediate and silica-rich (see Table 3); the UCC is given in Table 1. Shaw et al. 1986
Continental Crust 82 Pb 15           µg/g Major and trace element compositional estimates of the Bulk Continental Crust given by Weaver and Tarney 1984. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Weaver & Tarney 1984
Continental Crust 82 Pb 11           µg/g Rudnick & Gao 2004
Continental Crust 82 Pb 8           µg/g Major and trace element compositional estimates of the Bulk Continental Crust given by Taylor and McLennan 1985 & 1995. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Taylor & McLennan 1985
Taylor & McLennan 1995
Continental Crust 82 Pb 12.5           µg/g Major and trace element compositional estimates of the Bulk Continental Crust given by Taylor 1964. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Taylor 1964
Continental Crust 82 Pb 15           µg/g Major and trace element compositional estimates of the Bulk Continental Crust given by Gao et al. 1998a. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Gao et al. 1998a
Continental Crust 82 Pb 14.8           µg/g Major and trace element compositional estimates of the Bulk Continental Crust given by Wedepohl 1995. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Wedepohl 1995
Continental Crust 82 Pb 12.6           µg/g Major and trace element compositional estimates of the Bulk Continental Crust given by Rudnick and Fountain 1995. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Rudnick & Fountain 1995
Continental Crust 82 Pb 11           µg/g Recommended composition of the Bulk Continental Crust where the total-crust composition is calculated according to the upper, middle and lower-crust compositions obtained in this study and corresponding weighing factors of 0.317, 0.296 and 0.388. The weighing factors are based on the layer thickness of the global continental crust, recalculated from crustal structure and areal proportion of various tectonic units given by Rudnick and Fountain 1995. Rudnick & Gao 2004 Rudnick & Fountain 1995
Continental Crust 82 Pb 20           µg/g Major and trace element compositional estimates of the Bulk Continental Crust given by Shaw et al. 1986. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Shaw et al. 1986
Continental Crust 82 Pb   2.8         wt% Elemental data on selected ore metals of Sedimentary exhalative deposit type. These values are consistent with median crustal abundance values given by Rudnick & Gao 2004 of the Treatise on Geochemistry, Elsevier. Candela 2004 Rudnick & Gao 2004
Continental Crust 82 Pb 11           ppm Elemental data on selected ore metals of Sedimentary exhalative deposit type. All values are taken from Rudnick & Gao 2004 of the Treatise on Geochemistry, Elsevier. Candela 2004 Rudnick & Gao 2004
Continental Crust 82 Pb 11           ppm Major and minor element composition of the Bulk Crust of the Earth with selected trace element ratios as given by Rudnick and Gao 2004. Kemp & Hawkesworth 2004 Rudnick & Gao 2004
Continental Crust 82 Pb 12.6           ppm Rudnick & Fountain 1995
Continental Crust 82 Pb 14.8           ppm UCC = Shaw et al. (1967;1976); LCC = Rudnick & Presper (1990) in the proportions of Figure 2. Wedepohl 1995
Continental Crust 82 Pb 8           ppm Taylor & McLennan 1995
Continental Crust 82 Pb 8000           ppb Enrichment of elements in the bulk continental crust given by Rudnick & Gao from Chapter 3.1 of the Treatise on Geochemistry 2004. Palme & O'Neill 2004 Rudnick & Gao 2004
Continental Crust   U/Pb 0.113             Rudnick & Fountain 1995
Continental Intraplate Xenoliths 82 Pb 0.035           ppm Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths 82 Pb 0.119           ppm Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths 82 Pb 15.4           ppm Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov et al. 1997
Continental Intraplate Xenoliths 82 Pb 0.0012           ppm Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths 82 Pb 0.59           ppm Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov et al. 1997
Continental Intraplate Xenoliths 82 Pb 0.039           ppm Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths   Th/Pb 0.572             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths   Th/Pb 0.012             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths   Th/Pb 0.001             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov et al. 1997
Continental Intraplate Xenoliths   Th/Pb 0.122             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov et al. 1997
Continental Intraplate Xenoliths   Th/Pb 12.169             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths   Th/Pb 0.046             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths   U/Pb 0.027             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths   U/Pb 0.251             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths   U/Pb 0.007             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths   U/Pb 0.16             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths   U/Pb 0.001             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov et al. 1997
Continental Intraplate Xenoliths   U/Pb 0.029             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Ionov et al. 1997
Continental Shields & Platforms 82 Pb 11.4           ppm Rudnick & Fountain 1995
Continental Shields & Platforms 82 Pb 4.3           ppm Lower crustal rocks are combined in proportions as indicated in Figure 2. Average compositions were calculated using mafic granulitic xenoliths since these xenoliths are believed to represent the lowermost continental crust. Rudnick & Fountain 1995
Core 82 Pb 0.4           ppm Elemental composition of the Earth's core as given in ppm unless stated as wt. %. McDonough 2004
Core 82 Pb 0.4           µg/g Compostioinal models for the bulk Earth, core and silicate Earth are modified after McDonough & Sun (1995). McDonough 1998
Cratonic Xenoliths 82 Pb 1.5           ppm Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Gergoire et al. 2002
Cratonic Xenoliths 82 Pb 4.38           ppm Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004
Cratonic Xenoliths 82 Pb 18.5           ppm Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004
Cratonic Xenoliths 82 Pb 3.3           ppm Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Gregoire et al. 2002
Cratonic Xenoliths 82 Pb 4.3           ppm Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Gregoire et al. 2002
Cratonic Xenoliths 82 Pb 3.43           ppm Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004
Cratonic Xenoliths   Th/Pb 0.263             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004
Cratonic Xenoliths   Th/Pb 0.091             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Gregoire et al. 2002
Cratonic Xenoliths   Th/Pb 0.08             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Gergoire et al. 2002
Cratonic Xenoliths   Th/Pb 3.849             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004
Cratonic Xenoliths   Th/Pb 0.156             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Gregoire et al. 2002
Cratonic Xenoliths   U/Pb 0.02             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004
Cratonic Xenoliths   U/Pb 0.065             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Gregoire et al. 2002
Cratonic Xenoliths   U/Pb 0.064             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Gregoire et al. 2002
Cratonic Xenoliths   U/Pb 4.659             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004
Cratonic Xenoliths   U/Pb 0.007             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004
Cratonic Xenoliths   U/Pb 0.02             Representative trace element analyses of minerals from peridotite xenoliths from different lithologies and different regions. These minerals vary from garnet, cpx, and spinel to amphibole, phlogopite and carbonate and vary from being cratonic to 'off cratonic' generally from a region of continental intraplate xenoliths. Pearson et al. 2004 Gergoire et al. 2002
Danube River Particulates 82 Pb 178           µg/g Elemental particulates in major European rivers. Averages for major elements are weighted according to the suspended load prior to the construction of dams, for trace elements the average contents are mean values. Martin & Meybeck 1979
Depleted D-MORB basalts   208Pb/204Pb 37.92             Isotopic compositions of Depleted Mantle (DM) according to Lead isotopes in the 'Average' present day MORB.  These average MORB compositions are calculated using a more restrictive set of filters in order to assure that MORB representing low degree melts or melts which have experienced large amounts of fractional crystallization do not affect the average.  Though degree of melting or fractional crystallization do not effect the average isotopic composition, for incompatible trace element ratios to reflect source compositions only high degree melts should be used.  These will be known as 'D-MORB' for Depleted Mid-Ocean Ridge Basalts.  It is also noted that the values of the 'Average' and 'Extreme' D-MORB are very similar. Salters & Stracke 2004
Depleted D-MORB basalts   Ce/Pb 25             Constant' ratios in MORB as taken from the D-MORB (Depleted MORB) compilation as explained in Salters and Stracke 2003.  This compliation of 232 ratio values represent one method of removing low degree melts from MORB data.  All values have gone thru a series of tests and must meet certain criteria to be added to the D-MORB compilation.  This in turn leads to better estimates of values for the Depleted Mantle. Salters & Stracke 2004
Depleted Mantle   206Pb/204Pb 18             Present day depleted mantle trace elements are 10% of N-MORB abundances. Isotopic composition of the depleted mantle was chosen to lie near the depleted end of the Atlantic-Pacific MORB array. Parent/daughter ratios of the isotopic systems were calculated from the listed trace element and isotope data. Rehkamper & Hofmann 1997
Depleted Mantle   207Pb/204Pb 15.43             Present day depleted mantle trace elements are 10% of N-MORB abundances. Isotopic composition of the depleted mantle was chosen to lie near the depleted end of the Atlantic-Pacific MORB array. Parent/daughter ratios of the isotopic systems were calculated from the listed trace element and isotope data. Rehkamper & Hofmann 1997
Depleted Mantle   208Pb/204Pb 37.7             Present day depleted mantle trace elements are 10% of N-MORB abundances. Isotopic composition of the depleted mantle was chosen to lie near the depleted end of the Atlantic-Pacific MORB array. Parent/daughter ratios of the isotopic systems were calculated from the listed trace element and isotope data. Rehkamper & Hofmann 1997
Depleted Mantle 82 Pb 23.2   6.96       ppb Estimate for the concentrations in the Depleted Mantle of most of the elements of the Periodic Table.  Th/Pb is the element ratio/constraint used to make this estimate. Salters & Stracke 2004
Depleted Mantle 82 Pb 0.018     0.015 0.021   ppm Trace element composition of DMM (Depleted MORB Mantle) with minimum and maximum estimates based on assuming initiation of continuous depletion at 2.5Ga (min) and 3.5Ga (max). Workman & Hart 2005
Depleted Mantle 82 Pb 0.0489           ppm Present day depleted mantle trace elements are 10% of N-MORB abundances. Isotopic composition of the depleted mantle was chosen to lie near the depleted end of the Atlantic-Pacific MORB array. Parent/daughter ratios of the isotopic systems were calculated from the listed trace element and isotope data. Units of trace elements assumed to be in PPM. Rehkamper & Hofmann 1997
Depleted Mantle 82 Pb 0.09             Average value represents the mean of total Pb and unleachable Pb. Lead abundances in the upper mantle normalized to the C1 Chondrite value of 2430 ppb taken from Orgueil Chondrite values in Anders & Ebihara 1982. Jones & Drake 1986 Zartman & Tera 1973
Depleted Mantle   ¿ 10             Present day depleted mantle trace elements are 10% of N-MORB abundances. Isotopic composition of the depleted mantle was chosen to lie near the depleted end of the Atlantic-Pacific MORB array. Parent/daughter ratios of the isotopic systems were calculated from the listed trace element and isotope data. Rehkamper & Hofmann 1997
Depleted MORB Mantle   206Pb/204Pb 18.275             Average Lead Isotopic composition taken from Depleted MORB Mantle Su & Langmuir 2003. Workman & Hart 2005 Su & Langmuir 2003
Depleted MORB Mantle   207Pb/204Pb 15.486             Average Lead Isotopic composition taken from Depleted MORB Mantle Su & Langmuir 2003. Workman & Hart 2005 Su & Langmuir 2003
Depleted MORB Mantle   U/Pb 0.172             Average U/Pb ratio for DMM (Depleted MORB Mantle) as calculated by Workman and Hart 2005. Workman & Hart 2005
Depleted-Depleted MORB Mantle   206Pb/204Pb 17.573             Lead isotopic ratios of Depleted Depleted MORB Mantle which is based off isotopes that are 2s depleted from the average MORB value. Workman & Hart 2005
Depleted-Depleted MORB Mantle   207Pb/204Pb 15.404             Lead isotopic ratios of Depleted Depleted MORB Mantle which is based off isotopes that are 2s depleted from the average MORB value. Workman & Hart 2005
Depleted-Depleted MORB Mantle 82 Pb 0.014           ppm Trace element composition of DDMM (Depleted Depleted MORB Mantle) in ppm. Workman & Hart 2005
Depleted-Depleted MORB Mantle   U/Pb 0.131             Uranium/Lead ratio of Depleted Depleted MORB Mantle which is based off ratios that are 2s depleted from the average MORB value. Present-day parent daughter ratios, calculated with a continuous depletion model starting 3 Ga. Workman & Hart 2005
Diatom Oozes & Clay   206Pb/204Pb 18.649         15   Weighted average based on DCP analyses for 200 m of diatom oozes. Plank & Langmuir 1998
Diatom Oozes & Clay   207Pb/204Pb 15.633         15   Weighted average based on DCP analyses for 200 m of diatom oozes. Plank & Langmuir 1998
Diatom Oozes & Clay   208Pb/204Pb 38.501         15   Weighted average based on DCP analyses for 200 m of diatom oozes. Plank & Langmuir 1998
Diatom Oozes & Clay 82 Pb 22.5         15 ppm Weighted average based on DCP analyses for 200 m of diatom oozes. Pb is calculated based on the Pb/La ratio in piston core V14-57. Plank & Langmuir 1998
Diatome Clay   206Pb/204Pb 18.894         6   Upper 240 m of a total section that is 335 m thick (Site 581) dominated by diatom clay. Plank & Langmuir 1998
Diatome Clay   207Pb/204Pb 15.701         6   Upper 240 m of a total section that is 335 m thick (Site 581) dominated by diatom clay. Plank & Langmuir 1998
Diatome Clay   208Pb/204Pb 38.892         6   Upper 240 m of a total section that is 335 m thick (Site 581) dominated by diatom clay. Plank & Langmuir 1998
Diatome Clay 82 Pb 29.4         6 ppm Upper 240 m of a total section that is 335 m thick (Site 581) dominated by diatom clay. Plank & Langmuir 1998
Diatome Mud   206Pb/204Pb 18.783         6   Based on smear slides an average of 35% biogenic opal (SiO2) has been estimated, which is consistent with 17 wt% biogenic opal estimated from shipboard logs. The 6 analyses have simply been averaged since the SiO2 content is consistently ~57%. Plank & Langmuir 1998
Diatome Mud   207Pb/204Pb 15.631         6   Based on smear slides an average of 35% biogenic opal (SiO2) has been estimated, which is consistent with 17 wt% biogenic opal estimated from shipboard logs. The 6 analyses have simply been averaged since the SiO2 content is consistently ~57%. Plank & Langmuir 1998
Diatome Mud   208Pb/204Pb 38.673         6   Based on smear slides an average of 35% biogenic opal (SiO2) has been estimated, which is consistent with 17 wt% biogenic opal estimated from shipboard logs. The 6 analyses have simply been averaged since the SiO2 content is consistently ~57%. Plank & Langmuir 1998
Diatome Mud 82 Pb 9.6         6 ppm Based on smear slides an average of 35% biogenic opal (SiO2) has been estimated, which is consistent with 17 wt% biogenic opal estimated from shipboard logs. The 6 analyses have simply been averaged since the SiO2 content is consistently ~57%. Plank & Langmuir 1998
Diatome Ooze   206Pb/204Pb 18.944         4   This ash-rich diatom ooze contains 50% diatoms and 7% ash particles. The individual analyses therefore have been diluted with 65% SiO2 based on an average 75% SiO2 in the diatoms. The analyses were further enriched by adding an average Aleutian andesite (Plank & Langmuir, 1988) to represent the ash layers in this section. Plank & Langmuir 1998
Diatome Ooze   207Pb/204Pb 15.623         4   This ash-rich diatom ooze contains 50% diatoms and 7% ash particles. The individual analyses therefore have been diluted with 65% SiO2 based on an average 75% SiO2 in the diatoms. The analyses were further enriched by adding an average Aleutian andesite (Plank & Langmuir, 1988) to represent the ash layers in this section. Plank & Langmuir 1998
Diatome Ooze   208Pb/204Pb 38.631         4   This ash-rich diatom ooze contains 50% diatoms and 7% ash particles. The individual analyses therefore have been diluted with 65% SiO2 based on an average 75% SiO2 in the diatoms. The analyses were further enriched by adding an average Aleutian andesite (Plank & Langmuir, 1988) to represent the ash layers in this section. Plank & Langmuir 1998
Diatome Ooze 82 Pb 10.1         4 ppm This ash-rich diatom ooze contains 50% diatoms and 7% ash particles. The individual analyses therefore have been diluted with 65% SiO2 based on an average 75% SiO2 in the diatoms. The analyses were further enriched by adding an average Aleutian andesite (Plank & Langmuir, 1988) to represent the ash layers in this section. Pb was calculated from Pb/Th = 2.35 based on data in Ben Othman et al. (1989). Plank & Langmuir 1998
Diorite 82 Pb 19.4         260 ppm Average of 243 subsamples and 17 composites. Gao et al. 1998
Dover Sandstone 82 Pb 90         4 ppm Phosphatic pebbles and cements from nearshore, quartzose sandstones and siltstones of the mid-Paleozoic platform: Neptune Range (Dover Sandstones in the Pensacola Mountains, Antarctica). P2O5 = greater than 26%. Detection Limit = 1 ppm. Altschuller 1980 Cathcart & Schmidt 1974
DSDP/ODP Site 800   206Pb/204Pb 19.025             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
DSDP/ODP Site 800   207Pb/204Pb 15.655             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
DSDP/ODP Site 800   208Pb/204Pb 39.007             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
DSDP/ODP Site 800 82 Pb 5.41           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
DSDP/ODP Site 801   206Pb/204Pb 18.917             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
DSDP/ODP Site 801   206Pb/204Pb 18.92             Isotopic estimates of Bulk Marianas sediment derived from several different sources of analysis based upon DSDP Hole 801. Elliot et al. 1997
DSDP/ODP Site 801   207Pb/204Pb 15.65             Isotopic estimates of Bulk Marianas sediment derived from several different sources of analysis based upon DSDP Hole 801. Elliot et al. 1997
DSDP/ODP Site 801   207Pb/204Pb 15.646             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
DSDP/ODP Site 801   208Pb/204Pb 38.92             Isotopic estimates of Bulk Marianas sediment derived from several different sources of analysis based upon DSDP Hole 801. Elliot et al. 1997
DSDP/ODP Site 801   208Pb/204Pb 38.918             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
DSDP/ODP Site 801 82 Pb 6.6           ppm Compositional estimates of Bulk Marianas sediment as observed from the sediment column of DSDP Hole 801. Values derived according to methods given in Plank and Ludden 1992. Elliot et al. 1997
DSDP/ODP Site 801 82 Pb 6.6           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
E-MORB   206Pb/204Pb 18.032             Compositie analyses on E-MORB glasses from the Mid-Atlantic Ridge as reported in the RidgePetDB database. Major and most trace elements for this E-type MORB are taken from the sample EW19309-004-002. Klein 2004 Lehnert 2000
E-MORB   207Pb/204Pb 15.507             Compositie analyses on E-MORB glasses from the Mid-Atlantic Ridge as reported in the RidgePetDB database. Major and most trace elements for this E-type MORB are taken from the sample EW19309-004-002. Klein 2004 Lehnert 2000
E-MORB   208Pb/204Pb 38.237             Compositie analyses on E-MORB glasses from the Mid-Atlantic Ridge as reported in the RidgePetDB database. Major and most trace elements for this E-type MORB are taken from the sample EW19309-004-002. Klein 2004 Lehnert 2000
E-MORB 82 Pb 0.95           ppm Compositie analyses on E-MORB glasses from the Mid-Atlantic Ridge as reported in the RidgePetDB database. Major and most trace elements for this E-type MORB are taken from the sample EW19309-004-002. Klein 2004 Lehnert 2000
Early Archean Upper Crust 82 Pb 17           ppm Restoration model. Concentrations are calculated after restoration of the amount of crust lost be erosion, in particular, important when estimating the composition of juvenile continental crust. The restoration is performed based on geologic maps and stratigraphic successions as summarized in Table 2. Condie 1993
Early Archean Upper Crust 82 Pb 18           ppm Map model. Concentrations are directly calculated from rock proportions scaled from geologic maps and stratigraphic successions as summarized in Table 2. Condie 1993
Early Proterozoic Upper Crust 82 Pb 17           ppm Map model. Concentrations are directly calculated from rock proportions scaled from geologic maps and stratigraphic successions as summarized in Table 2. Condie 1993
Early Proterozoic Upper Crust 82 Pb 18           ppm Restoration model. Concentrations are calculated after restoration of the amount of crust lost be erosion, in particular, important when estimating the composition of juvenile continental crust. The restoration is performed based on geologic maps and stratigraphic successions as summarized in Table 2. Condie 1993
East China Craton 82 Pb 15           ppm Compostional estimate of East China. Assuming that the lowermost crust is represented by the average mafic granulite from Archean high-grade terrains in Central East China (Appendix 1). Gao et al. 1998
East China Craton 82 Pb 14           ppm Compostional estimate of East China. Assuming that the lowermost crust is represented by the average worldwide mafic granulite xenolith (Rudnick & Fountain, 1995). Gao et al. 1998
East Sunda Trench   206Pb/204Pb 18.99             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
East Sunda Trench   207Pb/204Pb 15.741             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
East Sunda Trench   208Pb/204Pb 39.328             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
East Sunda Trench 82 Pb 20.6           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Enriched-Depleted MORB Mantle   206Pb/204Pb 18.977             Lead isotopic ratios of Enriched Depleted MORB Mantle which is based off isotopes that are 2s enriched over the average MORB value. Workman & Hart 2005
Enriched-Depleted MORB Mantle   207Pb/204Pb 15.568             Lead isotopic ratios of Enriched Depleted MORB Mantle which is based off isotopes that are 2s enriched over the average MORB value. Workman & Hart 2005
Enriched-Depleted MORB Mantle 82 Pb 0.024           ppm Trace element composition of EDMM (Enriched Depleted MORB Mantle) in ppm. Workman & Hart 2005
Enriched-Depleted MORB Mantle   U/Pb 0.217             Uranium/Lead ratio of Enriched Depleted MORB Mantle which is based off ratios that are 2s enriched over the average MORB value. Present-day parent daughter ratios, calculated with a continuous depletion model starting 3 Ga. Workman & Hart 2005
Extreme Depleted D-MORB basalts   208Pb/204Pb 37.2             Isotopic compositions of Depleted Mantle (DM) according to Lead isotopes in the 'Extreme' present day MORB.  'Extreme' merely refers to the fact that these isotopic compositions are from the most depleted end of the MORB field. These average MORB compositions are calculated using a more restrictive set of filters in order to assure that MORB representing low degree melts or melts which have experienced large amounts of fractional crystallization do not affect the average.  Though degree of melting or fractional crystallization do not effect the average isotopic composition, for incompatible trace element ratios to reflect source compositions only high degree melts should be used.  These will be known as 'D-MORB' for Depleted Mid-Ocean Ridge Basalts.  It is also noted that the values of the 'Average' and 'Extreme' D-MORB are very similar. Salters & Stracke 2004
Felsic Archean Granulites 82 Pb 17 14       226 ppm Median values are used instead of average values in the model calculations to avoid outlyers of small sample populations. Rudnick & Fountain 1995
Felsic Granulites 82 Pb 11.2         137 ppm Average of 116 subsamples and 21 composites. Gao et al. 1998
Felsic Post-Archean Granulites 82 Pb 22.5 16       129 ppm Median values are used instead of average values in the model calculations to avoid outlyers of small sample populations. Rudnick & Fountain 1995
Felsic Volcanics 82 Pb 17.1         972 ppm Average of 895 subsamples and 77 composites. Gao et al. 1998
Felsic Volcanics 82 Pb 23           ppm Condie 1993
Felsic Volcanics 82 Pb 23           ppm Condie 1993
Felsic Volcanics 82 Pb 23           ppm Condie 1993
Felsic Volcanics 82 Pb 23           ppm Condie 1993
Felsic Volcanics 82 Pb 23           ppm Condie 1993
Felsic Volcanics 82 Pb 20           ppm Condie 1993
Felsic Volcanics 82 Pb 20           ppm Condie 1993
Ferruginous Clay   206Pb/204Pb 19.337         2   The proportions of the Fe-rich and carbonate-rich clays are roughly equal based on barrel sheet descriptions. One analysis of each rock type is simply averaged. Plank & Langmuir 1998
Ferruginous Clay   207Pb/204Pb 15.761         2   The proportions of the Fe-rich and carbonate-rich clays are roughly equal based on barrel sheet descriptions. One analysis of each rock type is simply averaged. Plank & Langmuir 1998
Ferruginous Clay   208Pb/204Pb 39.355         2   The proportions of the Fe-rich and carbonate-rich clays are roughly equal based on barrel sheet descriptions. One analysis of each rock type is simply averaged. Plank & Langmuir 1998
Ferruginous Clay 82 Pb 35.8         2 ppm The proportions of the Fe-rich and carbonate-rich clays are roughly equal based on barrel sheet descriptions. One analysis of each rock type is simply averaged. Plank & Langmuir 1998
Fresh Mid-Ocean Ridge Basalts   206Pb/204Pb 18.38         86   Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   207Pb/204Pb 15.5         86   Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   208Pb/204Pb 38.01         86   Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   208Pb/204Pb 37.9             Isotopic compositions of Depleted Mantle (DM) according to Lead isotopic values from the 'All MORB' data compilation.  To achieve an average isotopic composition of the Depleted Mantle the PetDB database was utilized. All eruptive products from mid-ocean spreading centers were compiled and filtered to include only samples that were erupted in water depths in excess of 2000 m.  All samples that contained more than 55 wt.% SiO2 were excluded as well. Samples with non-smooth REE patterns were excluded wherever applicable.  With these minimal steps of filtering, this ensures that at least part of the plume influenced basalts are excluded.    Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts   Ce/Pb 22.36             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts 82 Pb 0.38         14 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh MORB in Indian Ocean   206Pb/204Pb 17.764             Analyses on MORB glasses from the Indian Ocean as given by Klein et al. 1991. Klein 2004 Klein et al. 1991
Fresh MORB in Indian Ocean   207Pb/204Pb 15.483             Analyses on MORB glasses from the Indian Ocean as given by Klein et al. 1991. Klein 2004 Klein et al. 1991
Fresh MORB in Indian Ocean   208Pb/204Pb 37.803             Analyses on MORB glasses from the Indian Ocean as given by Klein et al. 1991. Klein 2004 Klein et al. 1991
Garonne River Particulates 82 Pb 381           µg/g Elemental particulates in major European rivers. Averages for major elements are weighted according to the suspended load prior to the construction of dams, for trace elements the average contents are mean values. Martin & Meybeck 1979
Granites 82 Pb 23.4         402 ppm Average of 369 subsamples and 33 composites. Gao et al. 1998
Granites 82 Pb 31.7         1226 ppm Average of 1140 subsamples and 86 composites. Gao et al. 1998
Granites 82 Pb 55.8         8 ppm Analysis of Glenelg River Complex Leucogranite represented in major and minor element abundances as well as slected trace element ratios given by Martin 1995 but plotted in Figure 5 of Kemp & Hawkesworth 2004. Kemp & Hawkesworth 2004 Kemp 2001
Granites 82 Pb 23           ppm Analysis of Archean Calc-Alkaline Type 1 & 2 Granite represented in major and minor element abundances as well as slected trace element ratios given by Martin 1995 but plotted in Figure 5 of Kemp & Hawkesworth 2004. Kemp & Hawkesworth 2004 Sylvester 1995
Granites 82 Pb 25           ppm Condie 1993
Granites 82 Pb 25           ppm Condie 1993
Granites 82 Pb 25           ppm Condie 1993
Granulites 82 Pb 20 14       231 ppm Average of granulite facies terrains. Rudnick & Presper 1990
Granulites 82 Pb 13           ppm Lower crust composition based on the estimates of Weaver and Tarney 1982. The lower crust itself was found to have the composition of Archaean Lewisian granulite facies gneiss. Weaver & Tarney 1984 Weaver & Tarney 1982
Granulites 82 Pb 15 10       413 ppm Average of granulite facies terrains. Rudnick & Presper 1990
Granulites   ¿-Pb 7.7 2.8       75   Average of granulite facies terrains. Calculated from U/Pb ratio and assuming 206Pb/204Pb = 17, 207Pb/204Pb = 15.4 and 208Pb/204Pb = 36. Rudnick & Presper 1990
Granulites   ¿-Pb 17.5 3.9       31   Average of granulite facies terrains. Calculated from U/Pb ratio and assuming 206Pb/204Pb = 17, 207Pb/204Pb = 15.4 and 208Pb/204Pb = 36. Rudnick & Presper 1990
Granulitic Xenolites 82 Pb 5 2       70 ppm Average of granulite facies xenoliths. Rudnick & Presper 1990
Granulitic Xenolites   ¿-Pb 4.2 2.3       48   Average of granulite facies xenoliths. Calculated from U/Pb ratio and assuming 206Pb/204Pb = 17, 207Pb/204Pb = 15.4 and 208Pb/204Pb = 36. Rudnick & Presper 1990
Graywackes 82 Pb 12           ppm Condie 1993
Graywackes 82 Pb 10           ppm Condie 1993
Graywackes 82 Pb 10           ppm Condie 1993
Graywackes 82 Pb 20           ppm Condie 1993
Graywackes 82 Pb 15           ppm Condie 1993
Graywackes 82 Pb 17           ppm Condie 1993
Greater Antilles Basalt   206Pb/204Pb 19.99         1   Average major and trace element values for Greater Antilles Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Greater Antilles Basalt   207Pb/204Pb 15.73         1   Average major and trace element values for Greater Antilles Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Greater Antilles Basalt   208Pb/204Pb 39.27         1   Average major and trace element values for Greater Antilles Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Greater Antilles Basalt 82 Pb 3.2         5 ppm Average major and trace element values for Greater Antilles Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Green Clay   206Pb/204Pb 18.944         3   Silty clay (37.5%), clay (50%) and nannofossil ooze (12.5%) make up this section. Two analyses have been made for silty clay and the clay lithologies, whereas the ooze is assumed to contain 56% CaO, 44% CO2 and 1000 ppm Sr. Plank & Langmuir 1998
Green Clay   207Pb/204Pb 15.623         3   Silty clay (37.5%), clay (50%) and nannofossil ooze (12.5%) make up this section. Two analyses have been made for silty clay and the clay lithologies, whereas the ooze is assumed to contain 56% CaO, 44% CO2 and 1000 ppm Sr. Plank & Langmuir 1998
Green Clay   208Pb/204Pb 38.631         3   Silty clay (37.5%), clay (50%) and nannofossil ooze (12.5%) make up this section. Two analyses have been made for silty clay and the clay lithologies, whereas the ooze is assumed to contain 56% CaO, 44% CO2 and 1000 ppm Sr. Plank & Langmuir 1998
Green Clay 82 Pb 15.9         3 ppm Silty clay (37.5%), clay (50%) and nannofossil ooze (12.5%) make up this section. Two analyses have been made for silty clay and the clay lithologies, whereas the ooze is assumed to contain 56% CaO, 44% CO2 and 1000 ppm Sr. Estimated value. Plank & Langmuir 1998
Greywackes 82 Pb 14.2           ppm Total average of group averages from USA, Canada, Australia, Sri Lanka and Germany using an equal statistical weight. Wedepohl 1995
Hydrothermal Sediment 82 Pb 65         4 ppm Average of 4 hydrothermal sediments or clays using DCP analyses. Estimated from the Ce/Pb ratio for a sample at 66.7 m depth in the drill core. Plank & Langmuir 1998
Interior North China Craton 82 Pb 15           ppm Compostional estimate of the interior of the North China craton. Gao et al. 1998
Interior North China Craton 82 Pb 14           ppm Compostional estimate of the interior of the North China craton. Average compostion of granulite terrains and calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
Interior North China Craton 82 Pb 15           ppm Compostional estimate of the interior of the North China craton. Includes sedimentary carbonates. Gao et al. 1998
Interior North China Craton 82 Pb 15           ppm Compostional estimate of the interior of the North China craton. Calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
Interior North China Craton 82 Pb 11           ppm Compostional estimate of the interior of the North China craton. Average compostion of granulite terrains. Gao et al. 1998
Interlayerd Clay & Chert   206Pb/204Pb 18.781         2   Bottom 65 m of a total section that is 335 m thick (Site 581) dominated by interlayered clay and chert. Plank & Langmuir 1998
Interlayerd Clay & Chert   207Pb/204Pb 15.678         2   Bottom 65 m of a total section that is 335 m thick (Site 581) dominated by interlayered clay and chert. Plank & Langmuir 1998
Interlayerd Clay & Chert   208Pb/204Pb 38.784         2   Bottom 65 m of a total section that is 335 m thick (Site 581) dominated by interlayered clay and chert. Plank & Langmuir 1998
Interlayerd Clay & Chert 82 Pb 6.4         2 ppm Bottom 65 m of a total section that is 335 m thick (Site 581) dominated by interlayered clay and chert. Plank & Langmuir 1998
Interlayered Chert & Limestone   206Pb/204Pb 18.845         5   Average of 5 chert and limestone analyses. Due to the poor recovery of these notoriously hard chert beds, this chert section may be overdiluted by silica causing an underestimation of the geochemical abundances. The dilution factors have therefore been based on the down-core logging for SiO2 contents. The logging data was also used to determine the average CaO as calcium carbonate to dilute all elements (except Sr) accordingly. Plank & Langmuir 1998
Interlayered Chert & Limestone   207Pb/204Pb 15.683         5   Average of 5 chert and limestone analyses. Due to the poor recovery of these notoriously hard chert beds, this chert section may be overdiluted by silica causing an underestimation of the geochemical abundances. The dilution factors have therefore been based on the down-core logging for SiO2 contents. The logging data was also used to determine the average CaO as calcium carbonate to dilute all elements (except Sr) accordingly. Plank & Langmuir 1998
Interlayered Chert & Limestone   208Pb/204Pb 38.955         5   Average of 5 chert and limestone analyses. Due to the poor recovery of these notoriously hard chert beds, this chert section may be overdiluted by silica causing an underestimation of the geochemical abundances. The dilution factors have therefore been based on the down-core logging for SiO2 contents. The logging data was also used to determine the average CaO as calcium carbonate to dilute all elements (except Sr) accordingly. Plank & Langmuir 1998
Interlayered Chert & Limestone 82 Pb 3.8         5 ppm Average of 5 chert and limestone analyses. Due to the poor recovery of these notoriously hard chert beds, this chert section may be overdiluted by silica causing an underestimation of the geochemical abundances. The dilution factors have therefore been based on the down-core logging for SiO2 contents. The logging data was also used to determine the average CaO as calcium carbonate to dilute all elements (except Sr) accordingly. Estimated value. Plank & Langmuir 1998
Interlayered Clay & Chert 82 Pb 124         12 ppm This interval is estimated to be 25% chert based on core descriptions. Average clay from 30-58 m depth is diluted with 25% chert at 100% Si. Average of 12 cherts and clays using DCP analyses. Plank & Langmuir 1998
Intermediate Granulites 82 Pb 9.9         136 ppm Average of 115 subsamples and 21 composites. Gao et al. 1998
Intermediate Mafic Archean Granulites 82 Pb 14 10       51 ppm Median values are used instead of average values in the model calculations to avoid outlyers of small sample populations. Rudnick & Fountain 1995
Intermediate Mafic Granulitic Xenolites 82 Pb 2.9 2.9       11 ppm Median values are used instead of average values in the model calculations to avoid outlyers of small sample populations. Rudnick & Fountain 1995
Intermediate Mafic Post-Archean Granulites 82 Pb 15 13       55 ppm Median values are used instead of average values in the model calculations to avoid outlyers of small sample populations. Rudnick & Fountain 1995
Intermediate Precambrian Granulites 82 Pb 18         26 ppm Shaw et al. 1986
Intra Stellar Medium 82 Pb 1.34   0.536         Abundance of highly volatile elements in the gas phase of Inter Stellar Medium (ISM) as viewed in the direction of Ophiucus star. ISM is viewed as cool gas. Palme & Jones 2004 Savage & Sembach 1996
Island Arc Andesite   206Pb/204Pb 18.81         4   Average major and trace element values from Primitive Oceanic Arc Andesites given by Kelemen et al. 2004. All major element oxide values are given in wt. % and trace elements in ppm. Kelemen et al. 2004
Island Arc Andesite   206Pb/204Pb 18.8         75   Average major and trace element values for Average Oceanic Arc Basalt given in weight percent and parts per million respectively. Kelemen et al. 2004
Island Arc Andesite   207Pb/204Pb 15.59         75   Average major and trace element values for Average Oceanic Arc Basalt given in weight percent and parts per million respectively. Kelemen et al. 2004
Island Arc Andesite   207Pb/204Pb 15.58         4   Average major and trace element values from Primitive Oceanic Arc Andesites given by Kelemen et al. 2004. All major element oxide values are given in wt. % and trace elements in ppm. Kelemen et al. 2004
Island Arc Andesite   208Pb/204Pb 38.49         75   Average major and trace element values for Average Oceanic Arc Basalt given in weight percent and parts per million respectively. Kelemen et al. 2004
Island Arc Andesite   208Pb/204Pb 38.54         4   Average major and trace element values from Primitive Oceanic Arc Andesites given by Kelemen et al. 2004. All major element oxide values are given in wt. % and trace elements in ppm. Kelemen et al. 2004
Island Arc Andesite 82 Pb 2.48         109 ppm Average major and trace element values for Average Oceanic Arc Basalt given in weight percent and parts per million respectively. Kelemen et al. 2004
Island Arc Andesite 82 Pb 6         13 ppm Average major and trace element values from Primitive Oceanic Arc Andesites given by Kelemen et al. 2004. All major element oxide values are given in wt. % and trace elements in ppm. Kelemen et al. 2004
Island Arcs 82 Pb 10           ppm Taylor & McLennan 1995
Island Arcs 82 Pb 10         323 ppm Analysis of Continental Arc Granite from the Peninsula Range Batholith represented in major and minor element abundances as well as slected trace element ratios given by Martin 1995 but plotted in Figure 5 of Kemp & Hawkesworth 2004. Kemp & Hawkesworth 2004 Silver & Chappell 1998
Izu-Bonin Trench   206Pb/204Pb 18.917             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Izu-Bonin Trench   207Pb/204Pb 15.646             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Izu-Bonin Trench   208Pb/204Pb 38.918             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Izu-Bonin Trench 82 Pb 6.82           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Japan Trench   206Pb/204Pb 18.816             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 2 or high. Plank & Langmuir 1998
Japan Trench   207Pb/204Pb 15.694             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 2 or high. Plank & Langmuir 1998
Japan Trench   208Pb/204Pb 38.886             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 2 or high. Plank & Langmuir 1998
Japan Trench 82 Pb 23.68           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 2 or high. Plank & Langmuir 1998
Java Trench   206Pb/204Pb 18.99             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Java Trench   207Pb/204Pb 15.741             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Java Trench   208Pb/204Pb 39.328             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Java Trench 82 Pb 25.5           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Kamchatka Basalt   206Pb/204Pb 18.26         21   Average major and trace element values for Kamchatka Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Kamchatka Basalt   207Pb/204Pb 15.49         21   Average major and trace element values for Kamchatka Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Kamchatka Basalt   208Pb/204Pb 37.94         21   Average major and trace element values for Kamchatka Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Kamchatka Basalt 82 Pb 2.77         22 ppm Average major and trace element values for Kamchatka Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Kamchatka Trench   206Pb/204Pb 18.816             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 3 or moderate. Plank & Langmuir 1998
Kamchatka Trench   207Pb/204Pb 15.694             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 3 or moderate. Plank & Langmuir 1998
Kamchatka Trench   208Pb/204Pb 38.886             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 3 or moderate. Plank & Langmuir 1998
Kamchatka Trench 82 Pb 10.11           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 3 or moderate. Plank & Langmuir 1998
Kerm Trench   206Pb/204Pb 18.842             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Kerm Trench   207Pb/204Pb 15.659             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Kerm Trench   208Pb/204Pb 38.776             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Kerm Trench 82 Pb 49.8           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Kermadec Basalts   206Pb/204Pb 18.84         2   Average major and trace element values for Kermadec Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Kermadec Basalts   207Pb/204Pb 15.62         2   Average major and trace element values for Kermadec Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Kermadec Basalts   208Pb/204Pb 38.75         2   Average major and trace element values for Kermadec Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Kermadec Basalts 82 Pb 2.8         10 ppm Average major and trace element values for Kermadec Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Kimberlite 82 Pb 8.29         22 ppm Average major and trace element composition and selected isotopic ratio data for Koidu Kimberlites from Sierra Leone. Farmer 2004 Taylor et al. 1994
Komatiites 82 Pb 2           ppm Condie 1993
Kuriles Trench   206Pb/204Pb 18.816             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 2 or high. Plank & Langmuir 1998
Kuriles Trench   207Pb/204Pb 15.694             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 2 or high. Plank & Langmuir 1998
Kuriles Trench   208Pb/204Pb 38.886             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 2 or high. Plank & Langmuir 1998
Kuriles Trench 82 Pb 23.68           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 2 or high. Plank & Langmuir 1998
Kyzyl Kum 82 Pb 7         5 ppm Phosphatic sandstones and shales, near shore deltaic and littoral sediments of Kyzyl Kum, Uzbekistan, P2O5: >10%. Detection Limit = 1 ppm. Altschuller 1980 Kapustyanski 1964
La Caja Formation 82 Pb 12         8 ppm Gray, calcareous, pelletal phosphorites in a sequence of offshore cherty and silty limestones of the Mexican geosyncline, La Caja Formation in Concepcion del Oro of the Zacatecas province, Mexico. Detection Limit = 1 ppm. Altschuller 1980 Rogers et al. 1956
Late Archean Upper Crust 82 Pb 18           ppm Map model. Concentrations are directly calculated from rock proportions scaled from geologic maps and stratigraphic successions as summarized in Table 2. Condie 1993
Late Archean Upper Crust 82 Pb 18           ppm Restoration model. Concentrations are calculated after restoration of the amount of crust lost be erosion, in particular, important when estimating the composition of juvenile continental crust. The restoration is performed based on geologic maps and stratigraphic successions as summarized in Table 2. Condie 1993
Late Proterozoic Upper Crust 82 Pb 17           ppm Restoration model. Concentrations are calculated after restoration of the amount of crust lost be erosion, in particular, important when estimating the composition of juvenile continental crust. The restoration is performed based on geologic maps and stratigraphic successions as summarized in Table 2. Condie 1993
Late Proterozoic Upper Crust 82 Pb 16           ppm Map model. Concentrations are directly calculated from rock proportions scaled from geologic maps and stratigraphic successions as summarized in Table 2. Condie 1993
Lesser Antilles Basalt   206Pb/204Pb 19.3         26   Average major and trace element values for Lesser Antilles Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Lesser Antilles Basalt   207Pb/204Pb 15.71         26   Average major and trace element values for Lesser Antilles Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Lesser Antilles Basalt   208Pb/204Pb 38.9         26   Average major and trace element values for Lesser Antilles Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Lesser Antilles Basalt 82 Pb 2.4         32 ppm Average major and trace element values for Lesser Antilles Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Lower Continental Crust 82 Pb 4           ppm Major and minor element composition of the Lower Crust of the Earth with selected trace element ratios as given by Rudnick and Gao 2004. Kemp & Hawkesworth 2004 Rudnick & Gao 2004
Lower Continental Crust 82 Pb 12.9           µg/g Major and trace element compositional estimates of the lower continental crust as given by Liu et al. 2001 using lower crustal xenoliths from Hannuoba, North China Craton. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Liu et al. 2001
Lower Continental Crust 82 Pb 4.1           µg/g Major and trace element compositional estimates of the lower continental crust as given by Rudnick and Presper 1990 using median worldwide lower crustal xenoliths. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Rudnick & Presper 1990
Lower Continental Crust 82 Pb 13           µg/g Major and trace element compositional estimates of the lower continental crust as given by Weaver and Tarney 1984 using Scourian granulites from Scotland. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Weaver & Tarney 1984
Lower Continental Crust 82 Pb 6           µg/g Major and trace element compositional estimates of the lower continental crust as given by Shaw et al. 1994 using Kapuskasing Structural Zone granulites. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Shaw et al. 1994
Lower Continental Crust 82 Pb 3.3           µg/g Major and trace element compositional estimates of the lower continental crust as given by Rudnick and Taylor 1987 using lower crustal xenoliths from the McBride Province, Queensland, Australia. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Rudnick & Taylor 1987
Lower Continental Crust 82 Pb 9.8           µg/g Major and trace element compositional estimates of the lower continental crust as given by Condie and Selverstone 1999 using lower crustal xenoliths from the four corners region, Colorado Plateu, USA. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Condie & Selverstone 1999
Lower Continental Crust 82 Pb 5           µg/g Major and trace element compositional estimates of the lower continental crust as given by Taylor and McLennan 1985, 1995 using average lower crustal abundances. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Taylor & McLennan 1985
Taylor & McLennan 1995
Lower Continental Crust 82 Pb 4           µg/g Major and trace element compositional estimates of the lower continental crust as given by Rudnick and Fountain 1995 using global average seismic velocities and granulites. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Rudnick & Fountain 1995
Lower Continental Crust 82 Pb 4           µg/g Recommended composition of the Lower Continental crust as given by various sources. Major element oxides are given in wt.% and trace element concentrations are given in either ng/g or ¿g/g. Rudnick & Gao 2004 Rudnick & Fountain 1995
Lower Continental Crust 82 Pb 12.5           µg/g Major and trace element compositional estimates of the lower continental crust as given by Wedepohl 1995 using lower crust in Western Europe derived from siesmic data and granulite xenolith composition. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Wedepohl 1995
Lower Continental Crust 82 Pb 13           µg/g Major and trace element compositional estimates of the lower continental crust as given by Gao et al. 1998a using seismic velocities and granulite data from the North China craton. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Gao et al. 1998a
Lower Continental Crust 82 Pb 7.5           ppm Present day Lower Continental Crust composition as given in Taylor & McLennan 1981. Values are used as one of many models of Lower Continental crustal composition to which other such analyses are compared. Shaw et al. 1986 Taylor & McLennan 1981
Lower Continental Crust 82 Pb 7.5           ppm Rudnick & Goldstein 1990 Newsom et al. 1986
Lower Continental Crust 82 Pb 5.2           ppm Rudnick & Goldstein 1990 Davies 1984
Lower Continental Crust 82 Pb 6.8           ppm Rudnick & Goldstein 1990 Zartman & Doe 1981
Lower Continental Crust 82 Pb 4           ppm Rudnick & Goldstein 1990 Taylor & McLennan 1985
Lower Continental Crust 82 Pb 23           ppm Based on the mean values of estimates of the regional abundances of high metamorphic grade Precambrian rock types ad divided by SiO2 contents into ultrabasis, basic, intermediate and silica-rich (see Table 3). Shaw et al. 1986
Lower Continental Crust 82 Pb 7           ppm Rudnick & Goldstein 1990
Lower Continental Crust 82 Pb 12.5           ppm LCC = Rudnick & Presper (1990) in the proportions of Figure 2. Wedepohl 1995
Lower Continental Crust 82 Pb 4.2           ppm Rudnick & Fountain 1995
Lower Continental Crust 82 Pb 4           ppm Taylor & McLennan 1995
Lower Continental Crust   U/Pb 0.047             Rudnick & Fountain 1995
Luzon Basalt   206Pb/204Pb 18.2         1   Average major and trace element values for Luzon Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Luzon Basalt   207Pb/204Pb 15.51         1   Average major and trace element values for Luzon Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Luzon Basalt   208Pb/204Pb 38.14         1   Average major and trace element values for Luzon Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
MacKenzie River Particulates 82 Pb 24           µg/g Elemental particulates in major North American rivers. Averages for major elements are weighted according to the suspended load prior to the construction of dams, for trace elements the average contents are mean values. Martin & Meybeck 1979
Mafic Archean Granulites 82 Pb 6 5       59 ppm Median values are used instead of average values in the model calculations to avoid outlyers of small sample populations. Rudnick & Fountain 1995
Mafic Granulites 82 Pb 9.82         128 ppm Average of 93 subsamples and 35 composites. Gao et al. 1998
Mafic Granulitic Xenolites 82 Pb 2.58 1.8       47 ppm Median values are used instead of average values in the model calculations to avoid outlyers of small sample populations. Rudnick & Fountain 1995
Mafic Intrusions 82 Pb 33         308 ppm Average of 276 subsamples and 32 composites. Gao et al. 1998
Mafic Post-Archean Granulites 82 Pb 8.5 6       27 ppm Median values are used instead of average values in the model calculations to avoid outlyers of small sample populations. Rudnick & Fountain 1995
Makran Trench 82 Pb 27.69           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 3 or moderate. Plank & Langmuir 1998
Manganese Nodules 82 Pb 900           ppm Average concentrations of various elements found in deep sea Manganese nodules.  Sea salt components are subtracted assuming all chloride is of seawater origin. Li 1991 Baturin 1988
Marianas Basalt   206Pb/204Pb 18.47         30   Average major and trace element values for Marianas Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Marianas Basalt   207Pb/204Pb 15.52         30   Average major and trace element values for Marianas Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Marianas Basalt   208Pb/204Pb 38.17         30   Average major and trace element values for Marianas Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Marianas Basalt 82 Pb 1.08         26 ppm Average major and trace element values for Marianas Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Marianas Trench   206Pb/204Pb 18.917             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Marianas Trench   207Pb/204Pb 15.646             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Marianas Trench   208Pb/204Pb 38.918             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Marianas Trench 82 Pb 6           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Marine Organisms 82 Pb 8.7           ppm Concentration values of various elements found in marine organisms. Element concentrations are mainly from brown algae data from Bowen 1979, which are also indicative of phytoplankton and zooplankton. Li 1991 Bowen 1979
Marine Pelagic Clay 82 Pb 0.006           ppm Average concentrations for various elements enriched in Oceanic Pelagic Clays.  Compared to the element values of Shales, the Pelagic Clays are relatively similar with few exceptions.   All sea salt components are subtracted from the sample analysis assuming all chloride is of seawater origin. Li 1991 Turekian & Wedepohl 1961
Baturin 1988
Marine Pelagic Clay 82 Pb 80           ppm Average concentrations of elements in oceanic pelagic clays.  The elemental values found in the Pelagic clays give good indications on river input of elements to the oceans.  From river sources to mid oceanic ridge sinks this is also a good indicator of atmospheric conditions for varying periods of world history.   Li 1982 Turekian & Wedepohl 1961
Brewer 1975

Marine Pelagic Clay 82 Pb 80           ppm Average concentrations for various elements enriched in Oceanic Pelagic Clays.  Compared to the element values of Shales, the Pelagic Clays are relatively similar with few exceptions.   All sea salt components are subtracted from the sample analysis assuming all chloride is of seawater origin. Li 1991 Turekian & Wedepohl 1961
Marine Phosphorites 82 Pb 50 30   0 180 17 ppm Average trace element abundances in Marine Phosphorite as based on 18 regional averages and various number of analyses averaged. All Comp low values of '0' are actually 'N.D.' values. Altschuller 1980
Marine Shales 82 Pb 20           ppm Concentrations of trace elements in shale as given by Turekian and Wedepohl 1961. Altschuller 1980 Turekian & Wedepohl 1961
Marine Shales 82 Pb 20           ppm Average concentrations of various elements in shales, note that the values are within a factor of two or better as compared to Oceanic Pelagic Clays with a few exceptions.  The exceptions, as far as this reference is concerned, are not critical and any conclusions drawn are applicable to both Oceanic Pelagic Clays and Shales.  Li 1991 Turekian & Wedepohl 1961
Mavic Volcanics 82 Pb 26         632 ppm Average of 538 subsamples and 49 composites. Gao et al. 1998
Mead Peak Phosphatic Shale Member 82 Pb         0.001 41 ppm Average phosphorite of Meade Peak Phosphatic Shale member of Phosphoria Formation. Modal values used for minor elements. Gulbrandsen 1966
Mekong River Particulates 82 Pb 113           µg/g Elemental particulates in major Asian rivers. Averages for major elements are weighted according to the suspended load prior to the construction of dams, for trace elements the average contents are mean values. Martin & Meybeck 1979
Mesozoic & Cenozoic Extensions 82 Pb 9.2           ppm Lower crustal rocks are combined in proportions as indicated in Figure 2. Average compositions were calculated using mafic granulitic xenoliths since these xenoliths are believed to represent the lowermost continental crust. Rudnick & Fountain 1995
Mesozoic & Cenozoic Extensions 82 Pb 18.5           ppm Rudnick & Fountain 1995
Mesozoic & Cenozoic Orogens 82 Pb 9.2           ppm Lower crustal rocks are combined in proportions as indicated in Figure 2. Average compositions were calculated using mafic granulitic xenoliths since these xenoliths are believed to represent the lowermost continental crust. Rudnick & Fountain 1995
Mesozoic & Cenozoic Orogens 82 Pb 15.9           ppm Rudnick & Fountain 1995
Mesozoic & Cenozoic Upper Crust 82 Pb 16           ppm Map model. Concentrations are directly calculated from rock proportions scaled from geologic maps and stratigraphic successions as summarized in Table 2. Condie 1993
Mesozoic & Cenozoic Upper Crust 82 Pb 17           ppm Restoration model. Concentrations are calculated after restoration of the amount of crust lost be erosion, in particular, important when estimating the composition of juvenile continental crust. The restoration is performed based on geologic maps and stratigraphic successions as summarized in Table 2. Condie 1993
Metafelsic Volcanics 82 Pb 14.7         41 ppm Average of 38 subsamples and 3 composites. Gao et al. 1998
Metalliferous Clay 82 Pb 73.4         12 ppm Average of 12 metalliferous clays between 10-30 m depth using DCP analyses. Plank & Langmuir 1998
Metapelitic Granulitic Xenolites 82 Pb 12.3 12       28 ppm Median values are used instead of average values in the model calculations to avoid outlyers of small sample populations. Rudnick & Fountain 1995
Mexico Trench 82 Pb 106.34           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 2 or high. Plank & Langmuir 1998
Middle Continental Crust 82 Pb 22           µg/g Major and Minor element compositional estimates of the Middle Continental crust as given by Weaver and Tarney 1984. Major element oxides are given in wt.% and trace elements abundances are given in ¿g/g or ng/g. Rudnick & Gao 2004 Weaver & Tarney 1984
Middle Continental Crust 82 Pb 15.2   0.2       µg/g Major and Minor element compositional estimates of the Middle Continental crust as given by This Study (Rudnick and Gao 2004). Major element oxides are given in wt.% and trace elements abundances are given in ¿g/g or ng/g. Rudnick & Gao 2004
Middle Continental Crust 82 Pb 9           µg/g Major and Minor element compositional estimates of the Middle Continental crust as given by Shaw et al. 1994. Major element oxides are given in wt.% and trace elements abundances are given in ¿g/g or ng/g. Rudnick & Gao 2004 Shaw et al. 1994
Middle Continental Crust 82 Pb 15.3           ppm Rudnick & Fountain 1995
Middle Continental Crust 82 Pb 15           µg/g Major and Minor element compositional estimates of the Middle Continental crust as given by Gao et al. 1998a. Major element oxides are given in wt.% and trace elements abundances are given in ¿g/g or ng/g. Rudnick & Gao 2004 Gao et al. 1998
Middle Continental Crust 82 Pb 15.3           µg/g Major and Minor element compositional estimates of the Middle Continental crust as given by Rudnick and Fountain 1995. Major element oxides are given in wt.% and trace elements abundances are given in ¿g/g or ng/g. Rudnick & Gao 2004 Rudnick & Fountain 1995
Middle Continental Crust 82 Pb 15.2           ppm Major and minor element composition of the Middle Crust of the Earth with selected trace element ratios as given by Rudnick and Gao 2004. Kemp & Hawkesworth 2004 Rudnick & Gao 2004
Middle Continental Crust   U/Pb 0.103             Rudnick & Fountain 1995
Middle Proterozoic Upper Crust 82 Pb 17           ppm Map model. Concentrations are directly calculated from rock proportions scaled from geologic maps and stratigraphic successions as summarized in Table 2. Condie 1993
Middle Proterozoic Upper Crust 82 Pb 18           ppm Restoration model. Concentrations are calculated after restoration of the amount of crust lost be erosion, in particular, important when estimating the composition of juvenile continental crust. The restoration is performed based on geologic maps and stratigraphic successions as summarized in Table 2. Condie 1993
Mishash Formation 82 Pb 90         3 ppm Calcareous pelletal and bone phosphorite, associated with limestones and cherts of the Mishash Formation Hamakhtesh haQatan carbonate platform, Israel. P2O5: 22-33%. Uranium is average value of 14 samples of P2O5 in excess of 20%. Chemically Determined, U.S. Geological Survey Lab. Detection Limit = 1 ppm. Altschuller 1980 Mazor 1963
Mississippi River Particulates 82 Pb 45           µg/g Elemental particulates in major North American rivers. Averages for major elements are weighted according to the suspended load prior to the construction of dams, for trace elements the average contents are mean values. Martin & Meybeck 1979
MORB Basaltic Glass   206Pb/204Pb 18.312             MORB Glass ODP0142-0864A-001M-003/0-3 from the East Pacific Rise near the Clipperton Transform that along with 4 other samples from this region form a coherent liquid line of descent for fractional crystalization from the highest MgO magma. Klein 2004 Lehnert 2000
MORB Basaltic Glass   207Pb/204Pb 15.484             MORB Glass ODP0142-0864A-001M-003/0-3 from the East Pacific Rise near the Clipperton Transform that along with 4 other samples from this region form a coherent liquid line of descent for fractional crystalization from the highest MgO magma. Klein 2004 Lehnert 2000
MORB Basaltic Glass   208Pb/204Pb 37.722             MORB Glass ODP0142-0864A-001M-003/0-3 from the East Pacific Rise near the Clipperton Transform that along with 4 other samples from this region form a coherent liquid line of descent for fractional crystalization from the highest MgO magma. Klein 2004 Lehnert 2000
N-MORB   206Pb/204Pb 18.21             Analyses on N-MORB from the Mid-Cayman Rise. Glass compositions reported in ReidgePetDB for sample KNO0054-027-005 then augmented with BA, V and Y data on a similar sample reported by Thompson et al. 1980 and the sole isotopic analysis of a Mid-Cayman rise basalt from RidgePetDB. Klein 2004 Thompson et al. 1980
N-MORB   206Pb/204Pb 18.215             Compositie analyses on N-MORB glasses from the Mid-Atlantic Ridge as reported in the RidgePetDB database. Major and most trace elements for this N-type MORB are taken from the sample EW19309-012-00. Klein 2004 Lehnert 2000
N-MORB   206Pb/204Pb 18.286             Analyses on N-MORB from the Northern section of the East Pacific Rise as reported by Niu et al. 1999. Klein 2004 Niu et al. 1999
N-MORB   206Pb/204Pb 17.953             Analyses of Kolbeinsey Ridge N-MORB which is a high F and high P MORB. These analyses were taken from the Ridge PetDB for sample POS0158-404-00 with major and trace elements derived from whole rock powders, Pb, Sr, Rb and isotope ratios derived from glasses. Klein 2004 Lehnert 2000
N-MORB   206Pb/204Pb 18.3             Average isotopic values of N-MORB taken from varying sources for comparison to 735B gabbro isotopic composition analyzed in Hart et al. 1999. Hart et al. 1999 Hofmann 1988
Ito et al. 1987
Smith et al. 1995
Hauri & Hart 1997
N-MORB   207Pb/204Pb 15.535             Compositie analyses on N-MORB glasses from the Mid-Atlantic Ridge as reported in the RidgePetDB database. Major and most trace elements for this N-type MORB are taken from the sample EW19309-012-00. Klein 2004 Lehnert 2000
N-MORB   207Pb/204Pb 15.486             Average isotopic values of N-MORB taken from varying sources for comparison to 735B gabbro isotopic composition analyzed in Hart et al. 1999. Hart et al. 1999 Hofmann 1988
Ito et al. 1987
Smith et al. 1995
Hauri & Hart 1997
N-MORB   207Pb/204Pb 15.48             Analyses on N-MORB from the Mid-Cayman Rise. Glass compositions reported in ReidgePetDB for sample KNO0054-027-005 then augmented with BA, V and Y data on a similar sample reported by Thompson et al. 1980 and the sole isotopic analysis of a Mid-Cayman rise basalt from RidgePetDB. Klein 2004 Thompson et al. 1980
N-MORB   207Pb/204Pb 15.464             Analyses on N-MORB from the Northern section of the East Pacific Rise as reported by Niu et al. 1999. Klein 2004 Niu et al. 1999
N-MORB   207Pb/204Pb 15.424             Analyses of Kolbeinsey Ridge N-MORB which is a high F and high P MORB. These analyses were taken from the Ridge PetDB for sample POS0158-404-00 with major and trace elements derived from whole rock powders, Pb, Sr, Rb and isotope ratios derived from glasses. Klein 2004 Lehnert 2000
N-MORB   208Pb/204Pb 37.66             Analyses on N-MORB from the Mid-Cayman Rise. Glass compositions reported in ReidgePetDB for sample KNO0054-027-005 then augmented with BA, V and Y data on a similar sample reported by Thompson et al. 1980 and the sole isotopic analysis of a Mid-Cayman rise basalt from RidgePetDB. Klein 2004 Thompson et al. 1980
N-MORB   208Pb/204Pb 37.891             Average isotopic values of N-MORB taken from varying sources for comparison to 735B gabbro isotopic composition analyzed in Hart et al. 1999. Hart et al. 1999 Hofmann 1988
Ito et al. 1987
Smith et al. 1995
Hauri & Hart 1997
N-MORB   208Pb/204Pb 37.636             Analyses on N-MORB from the Northern section of the East Pacific Rise as reported by Niu et al. 1999. Klein 2004 Niu et al. 1999
N-MORB   208Pb/204Pb 37.608             Analyses of Kolbeinsey Ridge N-MORB which is a high F and high P MORB. These analyses were taken from the Ridge PetDB for sample POS0158-404-00 with major and trace elements derived from whole rock powders, Pb, Sr, Rb and isotope ratios derived from glasses. Klein 2004 Lehnert 2000
N-MORB   208Pb/204Pb 38.047             Compositie analyses on N-MORB glasses from the Mid-Atlantic Ridge as reported in the RidgePetDB database. Major and most trace elements for this N-type MORB are taken from the sample EW19309-012-00. Klein 2004 Lehnert 2000
N-MORB 82 Pb 0.489   0.15     26 ppm Trace element average abundances for N-MORB as taken from analysis of 26 fresh MORB glasses defined N-type by the light-REE depletion.  These values were originally measured by Jochum et al. 1988. All standard deviations were calculated from percent values given in Hofmann 1988 (Table 1). Hofmann 1988 Jochum et al. 1988
N-MORB 82 Pb 0.359           ppm Analyses on N-MORB from the Northern section of the East Pacific Rise as reported by Niu et al. 1999. Klein 2004 Niu et al. 1999
N-MORB 82 Pb 0.155           ppm Analyses of Kolbeinsey Ridge N-MORB which is a high F and high P MORB. These analyses were taken from the Ridge PetDB for sample POS0158-404-00 with major and trace elements derived from whole rock powders, Pb, Sr, Rb and isotope ratios derived from glasses. Klein 2004 Lehnert 2000
N-MORB 82 Pb 0.19           ppm Compositie analyses on N-MORB glasses from the Mid-Atlantic Ridge as reported in the RidgePetDB database. Major and most trace elements for this N-type MORB are taken from the sample EW19309-012-00. Klein 2004 Lehnert 2000
N-MORB 82 Pb 0.489           ppm Values of N-MORB taken from varying sources for comparison to 735B gabbro composition analyzed in Hart et al. 1999. Hart et al. 1999 Hofmann 1988
Ito et al. 1987
Smith et al. 1995
Hauri & Hart 1997
N-MORB   U/Pb 0.1454             Elemental ratio values of N-MORB taken from varying sources for comparison to 735B gabbro composition analyzed in Hart et al. 1999. Hart et al. 1999 Hofmann 1988
Ito et al. 1987
Smith et al. 1995
Hauri & Hart 1997
Nankai Trench 82 Pb 33.37           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Nano Ooze 82 Pb 7.8         4 ppm Average of 4 nanno oozes after Peate et al. (1997) that have been diluted by the percentages of pure CaCO3 in the drill cores. The biogenic diluent is 28% CaCO3 in this 114 m deep unit. The average was calculated after renormalizing the analyses on a CaCO3-free basis followed by the dilution appropriate for these drill cores. Core estimates have been weigthed by the height of the drilled intervals. Plank & Langmuir 1998
New Hebrides Islands   206Pb/204Pb 18.4         4   Average major and trace element values for New Hebrides Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
New Hebrides Islands   207Pb/204Pb 15.52         4   Average major and trace element values for New Hebrides Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
New Hebrides Islands   208Pb/204Pb 38.31         4   Average major and trace element values for New Hebrides Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
New Hebrides Islands 82 Pb 4.12         10 ppm Average major and trace element values for New Hebrides Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
North American Shale Composite (NASC) 82 Pb 20           ppm Major oxide and minor element compositions for North American Shale Composite. No source reference found in text.  Condie 1993
North Antilles Trench   206Pb/204Pb 19.318             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 2 or high. Plank & Langmuir 1998
North Antilles Trench   207Pb/204Pb 15.769             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 2 or high. Plank & Langmuir 1998
North Antilles Trench   208Pb/204Pb 39.339             Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 2 or high. Plank & Langmuir 1998
North Antilles Trench 82 Pb 25.54           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 2 or high. Plank & Langmuir 1998
North Qinling Belt in China 82 Pb 16           ppm Compostional estimate of the North Qinling orogenic belt. The middle crust of the North Qinling belt is assumed to consist of the underthrusted South Qinling middle crust (see text for explanation). Gao et al. 1998
North Qinling Belt in China 82 Pb 27           ppm Compostional estimate of the Northern Qinling orogenic belt. Average compostion of granulite terrains and calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
North Qinling Belt in China 82 Pb 19           ppm Compostional estimate of the North Qinling orogenic belt. Average composition of granulite terrains. Gao et al. 1998
North Qinling Belt in China 82 Pb 41           ppm Compostional estimate of the North Qinling orogenic belt. Includes sedimentary carbonates. Gao et al. 1998
North Qinling Belt in China 82 Pb 44           ppm Compostional estimate of the North Qinling orogenic belt. Calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
Northern Blake Plateau Phosphorites 82 Pb 0.005         8 wt%ox Composition of Blake plateau phosphorite and comparable deposits. Data was taken from analyses of composites of 8 phosphorites. Manheim et al. 1980
Ob River Particulates 82 Pb 65           µg/g Elemental particulates in major Asian rivers. Averages for major elements are weighted according to the suspended load prior to the construction of dams, for trace elements the average contents are mean values. Martin & Meybeck 1979
Oceanic Plateaus   206Pb/204Pb 101.32             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Maliata locality, sample SG1. Values taken from Tejada et al. 2002. Kerr 2004 Tejada et al. 2002
Oceanic Plateaus   206Pb/204Pb 99.64             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample COL472. Values taken from Kerr et al. 2002. Kerr 2004 Kerr et al. 2002
Oceanic Plateaus   206Pb/204Pb 19.33             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample COL472. Values taken from Kerr et al. 2002. Kerr 2004 Kerr et al. 2002
Oceanic Plateaus   206Pb/204Pb 101.22             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 747, sample 16-5 and 103-6.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   206Pb/204Pb 17.85             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Maliata locality, sample SG1. Values taken from Tejada et al. 2002. Kerr 2004 Tejada et al. 2002
Oceanic Plateaus   206Pb/204Pb 100.62             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Maliata locality, sample ML407. Values taken from Tejada et al. 2002. Kerr 2004 Tejada et al. 2002
Oceanic Plateaus   206Pb/204Pb 18.16             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Ecuador locality, sample EQ1. Values taken from Reynaud et al. 1999. Kerr 2004 Reynaud et al. 1999
Oceanic Plateaus   206Pb/204Pb 100.25             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR94-35. Values taken from unpublished information. Kerr 2004
Oceanic Plateaus   206Pb/204Pb 17.82             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 738, sample 34-1 and 88-92. Values taken from Mahoney et al. 1995. Kerr 2004 Mahoney et al. 1995
Oceanic Plateaus   206Pb/204Pb 99.69             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau ODP site 807, sample 75-4 and 46-48. Values taken from Mahoney et al. 1993a. Kerr 2004 Mahoney et al. 1993
Oceanic Plateaus   206Pb/204Pb 18.68             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR94-35. Values taken from unpublished information. Kerr 2004
Oceanic Plateaus   206Pb/204Pb 99.79             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Curacao locality, sample CUR14. Values taken from Kerr et al. 1996b. Kerr 2004 Kerr et al. 1996
Oceanic Plateaus   206Pb/204Pb 17.65             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 747, sample 16-5 and 103-6.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   206Pb/204Pb 19.31             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Curacao locality, sample CUR14. Values taken from Kerr et al. 1996b. Kerr 2004 Kerr et al. 1996
Oceanic Plateaus   206Pb/204Pb 100.18             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Curacaolocality, sample CUR20. Values taken from Kerr et al. 1996b. Kerr 2004 Kerr et al. 1996
Oceanic Plateaus   206Pb/204Pb 18.19             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 748, sample 79-6 and 90-4.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   206Pb/204Pb 18.32             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Maliata locality, sample ML407. Values taken from Tejada et al. 2002. Kerr 2004 Tejada et al. 2002
Oceanic Plateaus   206Pb/204Pb 98.99             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 748, sample 79-6 and 90-4.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   206Pb/204Pb 100.01             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR160. Values taken from Aitken & Echeverria, Dupre & Echeverria and Jochum et al. 1991. Kerr 2004 Aitken & Echeverria 1984
Dupre & Echeverria 1984
Jochum et al. 1991
Oceanic Plateaus   206Pb/204Pb 19.08             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Curacaolocality, sample CUR20. Values taken from Kerr et al. 1996b. Kerr 2004 Kerr et al. 1996
Oceanic Plateaus   206Pb/204Pb 99.02             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau DSDP site 150, sample 11-2 and 63-67. Values taken from Hauff et al. 2000b. Kerr 2004 Hauff et al. 2000
Oceanic Plateaus   206Pb/204Pb 101.22             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 749, sample 15-5 and 125-7.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   206Pb/204Pb 18.03             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 749, sample 15-5 and 125-7.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   206Pb/204Pb 100.61             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 750, sample 17-3 and 23-26.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   206Pb/204Pb 18.32             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR160. Values taken from Aitken & Echeverria, Dupre & Echeverria and Jochum et al. 1991. Kerr 2004 Aitken & Echeverria 1984
Dupre & Echeverria 1984
Jochum et al. 1991
Oceanic Plateaus   206Pb/204Pb 101.38             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR117. Values taken from Aitken & Echeverria, Dupre & Echeverria and Jochum et al. 1991. Kerr 2004 Aitken & Echeverria 1984
Dupre & Echeverria 1984
Jochum et al. 1991
Oceanic Plateaus   206Pb/204Pb 19.07             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau DSDP site 150, sample 11-2 and 63-67. Values taken from Hauff et al. 2000b. Kerr 2004 Hauff et al. 2000
Oceanic Plateaus   206Pb/204Pb 17.53             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 750, sample 17-3 and 23-26.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   206Pb/204Pb 100.16             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 738, sample 34-1 and 88-92. Values taken from Mahoney et al. 1995. Kerr 2004 Mahoney et al. 1995
Oceanic Plateaus   206Pb/204Pb 100.01             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Ecuador locality, sample EQ1. Values taken from Reynaud et al. 1999. Kerr 2004 Reynaud et al. 1999
Oceanic Plateaus   206Pb/204Pb 18.86             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR117. Values taken from Aitken & Echeverria, Dupre & Echeverria and Jochum et al. 1991. Kerr 2004 Aitken & Echeverria 1984
Dupre & Echeverria 1984
Jochum et al. 1991
Oceanic Plateaus   206Pb/204Pb 100.66             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau ODP site 807, sample 88-3 and 76-79. Values taken from Mahoney et al. 1993a. Kerr 2004 Mahoney et al. 1993
Oceanic Plateaus   206Pb/204Pb 100.72             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample SDB18. Values taken from Kerr et al. 1997 and Hauff et al. 2000b. Kerr 2004 Kerr et al. 1997
Hauff et al. 2000
Oceanic Plateaus   206Pb/204Pb 18.4             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau ODP site 807, sample 75-4 and 46-48. Values taken from Mahoney et al. 1993a. Kerr 2004 Mahoney et al. 1993
Oceanic Plateaus   206Pb/204Pb 18.87             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample SDB18. Values taken from Kerr et al. 1997 and Hauff et al. 2000b. Kerr 2004 Kerr et al. 1997
Hauff et al. 2000
Oceanic Plateaus   206Pb/204Pb 18.67             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau ODP site 807, sample 88-3 and 76-79. Values taken from Mahoney et al. 1993a. Kerr 2004 Mahoney et al. 1993
Oceanic Plateaus   206Pb/204Pb 100.06             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Santa Isabel locality, sample I96. Values taken from Tejada et al. 1996. Kerr 2004 Tejada et al. 1996
Oceanic Plateaus   206Pb/204Pb 99.59             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample VIJ1. Values taken from Kerr et al. 1997 and Hauff et al. 2000b. Kerr 2004 Kerr et al. 1997
Hauff et al. 2000
Oceanic Plateaus   206Pb/204Pb 19.22             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample VIJ1. Values taken from Kerr et al. 1997 and Hauff et al. 2000b. Kerr 2004 Kerr et al. 1997
Hauff et al. 2000
Oceanic Plateaus   206Pb/204Pb 18.64             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Santa Isabel locality, sample I96. Values taken from Tejada et al. 1996. Kerr 2004 Tejada et al. 1996
Oceanic Plateaus   207Pb/204Pb 15.54             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Santa Isabel locality, sample I96. Values taken from Tejada et al. 1996. Kerr 2004 Tejada et al. 1996
Oceanic Plateaus   207Pb/204Pb 15.58             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample VIJ1. Values taken from Kerr et al. 1997 and Hauff et al. 2000b. Kerr 2004 Kerr et al. 1997
Hauff et al. 2000
Oceanic Plateaus   207Pb/204Pb 3.03             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample COL472. Values taken from Kerr et al. 2002. Kerr 2004 Kerr et al. 2002
Oceanic Plateaus   207Pb/204Pb 15.58             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample COL472. Values taken from Kerr et al. 2002. Kerr 2004 Kerr et al. 2002
Oceanic Plateaus   207Pb/204Pb 3.63             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 747, sample 16-5 and 103-6.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   207Pb/204Pb 15.47             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Maliata locality, sample SG1. Values taken from Tejada et al. 2002. Kerr 2004 Tejada et al. 2002
Oceanic Plateaus   207Pb/204Pb 2.14             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Maliata locality, sample ML407. Values taken from Tejada et al. 2002. Kerr 2004 Tejada et al. 2002
Oceanic Plateaus   207Pb/204Pb 15.58             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR117. Values taken from Aitken & Echeverria, Dupre & Echeverria and Jochum et al. 1991. Kerr 2004 Aitken & Echeverria 1984
Dupre & Echeverria 1984
Jochum et al. 1991
Oceanic Plateaus   207Pb/204Pb 15.53             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Ecuador locality, sample EQ1. Values taken from Reynaud et al. 1999. Kerr 2004 Reynaud et al. 1999
Oceanic Plateaus   207Pb/204Pb 3.26             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR94-35. Values taken from unpublished information. Kerr 2004
Oceanic Plateaus   207Pb/204Pb 15.75             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 738, sample 34-1 and 88-92. Values taken from Mahoney et al. 1995. Kerr 2004 Mahoney et al. 1995
Oceanic Plateaus   207Pb/204Pb 0.45             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau ODP site 807, sample 75-4 and 46-48. Values taken from Mahoney et al. 1993a. Kerr 2004 Mahoney et al. 1993
Oceanic Plateaus   207Pb/204Pb 15.54             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR94-35. Values taken from unpublished information. Kerr 2004
Oceanic Plateaus   207Pb/204Pb 2.23             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Curacao locality, sample CUR14. Values taken from Kerr et al. 1996b. Kerr 2004 Kerr et al. 1996
Oceanic Plateaus   207Pb/204Pb 15.51             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 747, sample 16-5 and 103-6.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   207Pb/204Pb 15.59             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Curacao locality, sample CUR14. Values taken from Kerr et al. 1996b. Kerr 2004 Kerr et al. 1996
Oceanic Plateaus   207Pb/204Pb 1.41             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Curacaolocality, sample CUR20. Values taken from Kerr et al. 1996b. Kerr 2004 Kerr et al. 1996
Oceanic Plateaus   207Pb/204Pb 15.64             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 748, sample 79-6 and 90-4.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   207Pb/204Pb 15.51             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Maliata locality, sample ML407. Values taken from Tejada et al. 2002. Kerr 2004 Tejada et al. 2002
Oceanic Plateaus   207Pb/204Pb 7.14             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 748, sample 79-6 and 90-4.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   207Pb/204Pb 15.55             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Curacaolocality, sample CUR20. Values taken from Kerr et al. 1996b. Kerr 2004 Kerr et al. 1996
Oceanic Plateaus   207Pb/204Pb 1.35             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 749, sample 15-5 and 125-7.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   207Pb/204Pb 15.55             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 749, sample 15-5 and 125-7.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   207Pb/204Pb 4.31             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 750, sample 17-3 and 23-26.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   207Pb/204Pb 15.5             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR160. Values taken from Aitken & Echeverria, Dupre & Echeverria and Jochum et al. 1991. Kerr 2004 Aitken & Echeverria 1984
Dupre & Echeverria 1984
Jochum et al. 1991
Oceanic Plateaus   207Pb/204Pb 15.6             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau DSDP site 150, sample 11-2 and 63-67. Values taken from Hauff et al. 2000b. Kerr 2004 Hauff et al. 2000
Oceanic Plateaus   207Pb/204Pb 15.49             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 750, sample 17-3 and 23-26.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   207Pb/204Pb 0.58             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 738, sample 34-1 and 88-92. Values taken from Mahoney et al. 1995. Kerr 2004 Mahoney et al. 1995
Oceanic Plateaus   207Pb/204Pb 4.45             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Ecuador locality, sample EQ1. Values taken from Reynaud et al. 1999. Kerr 2004 Reynaud et al. 1999
Oceanic Plateaus   207Pb/204Pb -0.24             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau ODP site 807, sample 88-3 and 76-79. Values taken from Mahoney et al. 1993a. Kerr 2004 Mahoney et al. 1993
Oceanic Plateaus   207Pb/204Pb 1.57             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample SDB18. Values taken from Kerr et al. 1997 and Hauff et al. 2000b. Kerr 2004 Kerr et al. 1997
Hauff et al. 2000
Oceanic Plateaus   207Pb/204Pb 15.53             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau ODP site 807, sample 75-4 and 46-48. Values taken from Mahoney et al. 1993a. Kerr 2004 Mahoney et al. 1993
Oceanic Plateaus   207Pb/204Pb 15.54             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample SDB18. Values taken from Kerr et al. 1997 and Hauff et al. 2000b. Kerr 2004 Kerr et al. 1997
Hauff et al. 2000
Oceanic Plateaus   207Pb/204Pb 15.55             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau ODP site 807, sample 88-3 and 76-79. Values taken from Mahoney et al. 1993a. Kerr 2004 Mahoney et al. 1993
Oceanic Plateaus   207Pb/204Pb 1.61             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Santa Isabel locality, sample I96. Values taken from Tejada et al. 1996. Kerr 2004 Tejada et al. 1996
Oceanic Plateaus   207Pb/204Pb 0.9             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample VIJ1. Values taken from Kerr et al. 1997 and Hauff et al. 2000b. Kerr 2004 Kerr et al. 1997
Hauff et al. 2000
Oceanic Plateaus   207Pb/204Pb 0.3             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Maliata locality, sample SG1. Values taken from Tejada et al. 2002. Kerr 2004 Tejada et al. 2002
Oceanic Plateaus   208Pb/204Pb 38.56             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR117. Values taken from Aitken & Echeverria, Dupre & Echeverria and Jochum et al. 1991. Kerr 2004 Aitken & Echeverria 1984
Dupre & Echeverria 1984
Jochum et al. 1991
Oceanic Plateaus   208Pb/204Pb 37.84             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Ecuador locality, sample EQ1. Values taken from Reynaud et al. 1999. Kerr 2004 Reynaud et al. 1999
Oceanic Plateaus   208Pb/204Pb 39.01             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 738, sample 34-1 and 88-92. Values taken from Mahoney et al. 1995. Kerr 2004 Mahoney et al. 1995
Oceanic Plateaus   208Pb/204Pb 38.19             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR94-35. Values taken from unpublished information. Kerr 2004
Oceanic Plateaus   208Pb/204Pb 38.16             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 747, sample 16-5 and 103-6.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   208Pb/204Pb 5             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Maliata locality, sample ML407. Values taken from Tejada et al. 2002. Kerr 2004 Tejada et al. 2002
Oceanic Plateaus   208Pb/204Pb 38.9             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Curacao locality, sample CUR14. Values taken from Kerr et al. 1996b. Kerr 2004 Kerr et al. 1996
Oceanic Plateaus   208Pb/204Pb 38.38             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 748, sample 79-6 and 90-4.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   208Pb/204Pb 38.23             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Maliata locality, sample ML407. Values taken from Tejada et al. 2002. Kerr 2004 Tejada et al. 2002
Oceanic Plateaus   208Pb/204Pb 38.82             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Curacaolocality, sample CUR20. Values taken from Kerr et al. 1996b. Kerr 2004 Kerr et al. 1996
Oceanic Plateaus   208Pb/204Pb 38.16             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 749, sample 15-5 and 125-7.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   208Pb/204Pb 37.82             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR160. Values taken from Aitken & Echeverria, Dupre & Echeverria and Jochum et al. 1991. Kerr 2004 Aitken & Echeverria 1984
Dupre & Echeverria 1984
Jochum et al. 1991
Oceanic Plateaus   208Pb/204Pb 38.7             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau DSDP site 150, sample 11-2 and 63-67. Values taken from Hauff et al. 2000b. Kerr 2004 Hauff et al. 2000
Oceanic Plateaus   208Pb/204Pb 38.01             Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 750, sample 17-3 and 23-26.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus   208Pb/204Pb 38.38             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau ODP site 807, sample 75-4 and 46-48. Values taken from Mahoney et al. 1993a. Kerr 2004 Mahoney et al. 1993
Oceanic Plateaus   208Pb/204Pb 38.46             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample SDB18. Values taken from Kerr et al. 1997 and Hauff et al. 2000b. Kerr 2004 Kerr et al. 1997
Hauff et al. 2000
Oceanic Plateaus   208Pb/204Pb 38.54             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau ODP site 807, sample 88-3 and 76-79. Values taken from Mahoney et al. 1993a. Kerr 2004 Mahoney et al. 1993
Oceanic Plateaus   208Pb/204Pb 38.91             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample VIJ1. Values taken from Kerr et al. 1997 and Hauff et al. 2000b. Kerr 2004 Kerr et al. 1997
Hauff et al. 2000
Oceanic Plateaus   208Pb/204Pb 38.6             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Santa Isabel locality, sample I96. Values taken from Tejada et al. 1996. Kerr 2004 Tejada et al. 1996
Oceanic Plateaus   208Pb/204Pb 6             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Maliata locality, sample SG1. Values taken from Tejada et al. 2002. Kerr 2004 Tejada et al. 2002
Oceanic Plateaus   208Pb/204Pb 38.86             Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample COL472. Values taken from Kerr et al. 2002. Kerr 2004 Kerr et al. 2002
Oceanic Plateaus   208Pb/204Pb 37.91             Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Maliata locality, sample SG1. Values taken from Tejada et al. 2002. Kerr 2004 Tejada et al. 2002
Oceanic Plateaus 82 Pb 0.14           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Ecuador locality, sample EQ1. Values taken from Reynaud et al. 1999. Kerr 2004 Reynaud et al. 1999
Oceanic Plateaus 82 Pb 0.17           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Curacao locality, sample CUR14. Values taken from Kerr et al. 1996b. Kerr 2004 Kerr et al. 1996
Oceanic Plateaus 82 Pb 0.21           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau ODP site 807, sample 75-4 and 46-48. Values taken from Mahoney et al. 1993a. Kerr 2004 Mahoney et al. 1993
Oceanic Plateaus 82 Pb 0.23           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample SDB18. Values taken from Kerr et al. 1997 and Hauff et al. 2000b. Kerr 2004 Kerr et al. 1997
Hauff et al. 2000
Oceanic Plateaus 82 Pb 0.09           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 748, sample 79-6 and 90-4.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus 82 Pb 1.2           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Curacao locality, sample CUR14. Values taken from Kerr et al. 1996b. Kerr 2004 Kerr et al. 1996
Oceanic Plateaus 82 Pb 0.2           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Curacaolocality, sample CUR20. Values taken from Kerr et al. 1996b. Kerr 2004 Kerr et al. 1996
Oceanic Plateaus 82 Pb 8           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 748, sample 79-6 and 90-4.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus 82 Pb 0.17           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 749, sample 15-5 and 125-7.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus 82 Pb 0.15           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Maliata locality, sample ML407. Values taken from Tejada et al. 2002. Kerr 2004 Tejada et al. 2002
Oceanic Plateaus 82 Pb 0.18           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR160. Values taken from Aitken & Echeverria, Dupre & Echeverria and Jochum et al. 1991. Kerr 2004 Aitken & Echeverria 1984
Dupre & Echeverria 1984
Jochum et al. 1991
Oceanic Plateaus 82 Pb 1           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Curacaolocality, sample CUR20. Values taken from Kerr et al. 1996b. Kerr 2004 Kerr et al. 1996
Oceanic Plateaus 82 Pb 0.1           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau DSDP site 150, sample 11-2 and 63-67. Values taken from Hauff et al. 2000b. Kerr 2004 Hauff et al. 2000
Oceanic Plateaus 82 Pb 1.3           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR160. Values taken from Aitken & Echeverria, Dupre & Echeverria and Jochum et al. 1991. Kerr 2004 Aitken & Echeverria 1984
Dupre & Echeverria 1984
Jochum et al. 1991
Oceanic Plateaus 82 Pb 1.63           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 749, sample 15-5 and 125-7.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus 82 Pb 0.18           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 750, sample 17-3 and 23-26.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus 82 Pb 0.23           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR117. Values taken from Aitken & Echeverria, Dupre & Echeverria and Jochum et al. 1991. Kerr 2004 Aitken & Echeverria 1984
Dupre & Echeverria 1984
Jochum et al. 1991
Oceanic Plateaus 82 Pb 0.23           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau DSDP site 150, sample 11-2 and 63-67. Values taken from Hauff et al. 2000b. Kerr 2004 Hauff et al. 2000
Oceanic Plateaus 82 Pb 0.2           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Ecuador locality, sample EQ1. Values taken from Reynaud et al. 1999. Kerr 2004 Reynaud et al. 1999
Oceanic Plateaus 82 Pb 0.82           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 750, sample 17-3 and 23-26.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus 82 Pb 0.18           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 738, sample 34-1 and 88-92. Values taken from Mahoney et al. 1995. Kerr 2004 Mahoney et al. 1995
Oceanic Plateaus 82 Pb 12.1           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR117. Values taken from Aitken & Echeverria, Dupre & Echeverria and Jochum et al. 1991. Kerr 2004 Aitken & Echeverria 1984
Dupre & Echeverria 1984
Jochum et al. 1991
Oceanic Plateaus 82 Pb 0.17           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Gorgona locality, sample GOR94-35. Values taken from unpublished information. Kerr 2004
Oceanic Plateaus 82 Pb 0.19           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Maliata locality, sample ML407. Values taken from Tejada et al. 2002. Kerr 2004 Tejada et al. 2002
Oceanic Plateaus 82 Pb 0.17           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Maliata locality, sample SG1. Values taken from Tejada et al. 2002. Kerr 2004 Tejada et al. 2002
Oceanic Plateaus 82 Pb 0.16           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Kerguelen Plateau ODP site 747, sample 16-5 and 103-6.  Information taken from Salters et al. 1992. Kerr 2004 Salters et al. 1992
Oceanic Plateaus 82 Pb 2.37           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample COL472. Values taken from Kerr et al. 2002. Kerr 2004 Kerr et al. 2002
Oceanic Plateaus 82 Pb 0.17           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample COL472. Values taken from Kerr et al. 2002. Kerr 2004 Kerr et al. 2002
Oceanic Plateaus 82 Pb 0.19           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Maliata locality, sample SG1. Values taken from Tejada et al. 2002. Kerr 2004 Tejada et al. 2002
Oceanic Plateaus 82 Pb 0.23           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Santa Isabel locality, sample I96. Values taken from Tejada et al. 1996. Kerr 2004 Tejada et al. 1996
Oceanic Plateaus 82 Pb 0.16           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau Santa Isabel locality, sample I96. Values taken from Tejada et al. 1996. Kerr 2004 Tejada et al. 1996
Oceanic Plateaus 82 Pb 0.19           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Carribean-Colombian Oceanic Plateau Colombia locality, sample VIJ1. Values taken from Kerr et al. 1997 and Hauff et al. 2000b. Kerr 2004 Kerr et al. 1997
Hauff et al. 2000
Oceanic Plateaus 82 Pb 0.22           ppm Representative analyses of Cretaceous oceanic plateau lavas from the Ontong-Java Plateau ODP site 807, sample 88-3 and 76-79. Values taken from Mahoney et al. 1993a. Kerr 2004 Mahoney et al. 1993
Oceans Deep water 82 Pb 4.5           ng/kg Deep ocean water is ~1,000 m depth. Where possible data is from the Pacific ocean that shows the greates variations; otherwhise data is from the Atlantic ocean. Depth = 1000 m Quinby-Hunt & Turekian 1983 Schaule & Patterson 1981
Oceans Surface water 82 Pb 13.6           ng/kg Surface or near-surface concentratio. Where possible data is from the Pacific ocean that shows the greates variations; otherwhise data is from the Atlantic ocean. Depth = 0.2 m. Quinby-Hunt & Turekian 1983 Schaule & Patterson 1981
ODP Site 735   206Pb/204Pb 17.704 17.662       22   Average of 22 composite strip samples as defined in Table 1. Hart et al. 1999
ODP Site 735   207Pb/204Pb 15.447 15.443       22   Average of 22 composite strip samples as defined in Table 1. Hart et al. 1999
ODP Site 735   208Pb/204Pb 37.381 37.352       22   Average of 22 composite strip samples as defined in Table 1. Hart et al. 1999
ODP Site 735   238U/204Pb 4.5             Average of 22 composite strip samples as defined in Table 1. Hart et al. 1999
ODP Site 735 82 Pb 0.601 0.36       22 ppm Average of 22 composite strip samples as defined in Table 1. Hart et al. 1999
ODP Site 735   U/Pb 0.092 0.069       22   Average of 22 composite strip samples as defined in Table 1. Hart et al. 1999
Orangeite   206Pb/204Pb       17.21 18.24 114   Average major and trace element composition and selected isotopic data for Orangeites from Swartuggens, Finisch, Bellsbank and Sover kimberlite localities in South Africa. Farmer 2004 Mitchell 1995
Orangeite   207Pb/204Pb       15.51 15.58 114   Average major and trace element composition and selected isotopic data for Orangeites from Swartuggens, Finisch, Bellsbank and Sover kimberlite localities in South Africa. Farmer 2004 Mitchell 1995
Orangeite   208Pb/204Pb       37.45 38.23 114   Average major and trace element composition and selected isotopic data for Orangeites from Swartuggens, Finisch, Bellsbank and Sover kimberlite localities in South Africa. Farmer 2004 Mitchell 1995
Orgueil Chondrite 82 Pb 2430         1 ppb Solar system abundances of major and minor elements as based on studies from the Orgueil Meteorite. Abundances in the Orgueil meteorite are adequately close to the C1 chondrite mean except for REE, in which case other studies will yield more preferable results Anders & Ebihara 1982
Orgueil Chondrite 82 Pb 2430         1 ppb Orgueil meteorite measurements. Anders & Grevesse 1989
Orinoco River Particulates 82 Pb 76           µg/g Elemental particulates in major South American rivers. Averages for major elements are weighted according to the suspended load prior to the construction of dams, for trace elements the average contents are mean values. Martin & Meybeck 1979
Paleozoic Orogens 82 Pb 6.6           ppm Lower crustal rocks are combined in proportions as indicated in Figure 2. Average compositions were calculated using mafic granulitic xenoliths since these xenoliths are believed to represent the lowermost continental crust. Rudnick & Fountain 1995
Paleozoic Orogens 82 Pb 14.2           ppm Rudnick & Fountain 1995
Paleozoic Upper Crust 82 Pb 16           ppm Map model. Concentrations are directly calculated from rock proportions scaled from geologic maps and stratigraphic successions as summarized in Table 2. Condie 1993
Paleozoic Upper Crust 82 Pb 17           ppm Restoration model. Concentrations are calculated after restoration of the amount of crust lost be erosion, in particular, important when estimating the composition of juvenile continental crust. The restoration is performed based on geologic maps and stratigraphic successions as summarized in Table 2. Condie 1993
Pelagic Clay   206Pb/204Pb 18.69             The uppermost layer of the sediment from Hole 801 of ODP Leg 129. Values given are estimates of the isotopic composition of this 65m layer based on several sources outside of this study. Elliot et al. 1997
Pelagic Clay   206Pb/204Pb 18.615         3   Middle 30 m of a total section that is 335 m thick (Site 581) dominated by pelagic clay. Plank & Langmuir 1998
Pelagic Clay   206Pb/204Pb 18.694         6   Average of 6 analyses weighted by depth interval. Plank & Langmuir 1998
Pelagic Clay   206Pb/204Pb 18.694         6   Average of 6 analyses weighted by depth interval. Plank & Langmuir 1998
Pelagic Clay   207Pb/204Pb 15.62             The uppermost layer of the sediment from Hole 801 of ODP Leg 129. Values given are estimates of the isotopic composition of this 65m layer based on several sources outside of this study. Elliot et al. 1997
Pelagic Clay   207Pb/204Pb 15.681         3   Middle 30 m of a total section that is 335 m thick (Site 581) dominated by pelagic clay. Plank & Langmuir 1998
Pelagic Clay   207Pb/204Pb 15.617         6   Average of 6 analyses weighted by depth interval. Plank & Langmuir 1998
Pelagic Clay   207Pb/204Pb 15.617         6   Average of 6 analyses weighted by depth interval. Plank & Langmuir 1998
Pelagic Clay   208Pb/204Pb 38.707         6   Average of 6 analyses weighted by depth interval. Plank & Langmuir 1998
Pelagic Clay   208Pb/204Pb 38.707         6   Average of 6 analyses weighted by depth interval. Plank & Langmuir 1998
Pelagic Clay   208Pb/204Pb 38.71             The uppermost layer of the sediment from Hole 801 of ODP Leg 129. Values given are estimates of the isotopic composition of this 65m layer based on several sources outside of this study. Elliot et al. 1997
Pelagic Clay   208Pb/204Pb 38.912         4   Middle 30 m of a total section that is 335 m thick (Site 581) dominated by pelagic clay. Plank & Langmuir 1998
Pelagic Clay 82 Pb 53.3         3 ppm Middle 30 m of a total section that is 335 m thick (Site 581) dominated by pelagic clay. Plank & Langmuir 1998
Pelagic Clay 82 Pb 32.2         8 ppm Average of 8 sediments that are all younger than Campanian-Maastrichtian and are typically Fe-rich clays. The basal sediments may be of hydrothermal origin. Pb is calculated from Pb/Th = 2.81 from unpublished ID-TIMS analyses. Plank & Langmuir 1998
Pelagic Clay 82 Pb 44         6 ppm Average of 6 analyses weighted by depth interval. Plank & Langmuir 1998
Pelagic Clay 82 Pb 33.4         55 ppm ODP Site through the toe of the accretionary prism into the basement. Only 350 m of sediments underneath the decollement are considered and used in a simple mean for this homogeneous sedimentary section that was sampled 55 times for every 3-13 m of section. Pb is calculated from the Pb/Th = 2.35 ratio. Plank & Langmuir 1998
Pelagic Clay 82 Pb 22.4         56 ppm Average of 56 sediments of Cretaceous age representing a diverse lithology including brown, gray, nanno, radiolarian and streaky clays. This section also includes turbidites and is very similar in composition as Site 765 in the East Sunda trench. This average is therefore based on both Site 261 and 765 data. Pb is calculated from Pb/Th = 2.81 from unpublished ID-TIMS analyses. Plank & Langmuir 1998
Pelagic Clay 82 Pb 22.4         56 ppm Average of 56 sediments of Cretaceous age representing a diverse lithology including brown, gray, nanno, radiolarian and streaky clays. This section also includes turbidites and is very similar in composition as Site 765 in the East Sunda trench. This average is therefore based on both Site 261 and 765 data. Pb is calculated from Pb/Th = 2.81 from unpublished ID-TIMS analyses. Plank & Langmuir 1998
Pelagic Clay 82 Pb 46.4         6 ppm Average of 6 analyses weighted by depth interval. Plank & Langmuir 1998
Pelagic Clay 82 Pb 46.4           ppm The uppermost layer of the sediment from Hole 801 of ODP Leg 129. Values given are estimates of the composition of this 65m layer based on the methodology of Plank and Ludden 1992. Elliot et al. 1997
Pelites 82 Pb 25.3         1341 ppm Average of 1238 subsamples and 103 composites. Gao et al. 1998
Pelites 82 Pb 18.3         69 ppm Average of 60 subsamples and 9 composites. Gao et al. 1998
Peninsular Range Batholith 82 Pb 28           ppm Analysis of Archean Calc-Alkaline Type 1 & 2 Granite represented in major and minor element abundances as well as slected trace element ratios given by Martin 1995 but plotted in Figure 5 of Kemp & Hawkesworth 2004. Kemp & Hawkesworth 2004 Sylvester 1995
Peru Trench 82 Pb 26.79           ppm Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Phanerozoic Flood Basalts   206Pb/204Pb 18.696         11   Major and trace element compositions as well as selected isotopic composition for Parana Flood Basalts in Gramado (Low Ti). Farmer 2004 Peate 1997
Phanerozoic Flood Basalts   206Pb/204Pb 18.911         31   Major and trace element compositions as well as selected isotopic composition for Columbia River Flood Basalts NW US (High Ti). Farmer 2004 Hooper & Hawkesworth 1993
Phanerozoic Flood Basalts   206Pb/204Pb 18.37         6   Major and trace element compositions as well as selected isotopic composition for Deccan Traps Flood Basalts Mahabaleshwar (High Ti). Farmer 2004 Lightfoot et al. 1990
Phanerozoic Flood Basalts   206Pb/204Pb 17.82         18   Major and trace element compositions as well as selected isotopic composition for Deccan Traps Flood Basalts Kolhapur (Low Ti). Farmer 2004 Lightfoot et al. 1990
Phanerozoic Flood Basalts   206Pb/204Pb 18.296         5   Major and trace element compositions as well as selected isotopic composition for Siberian Traps Flood Basalts Nadezhdinsky (High Ti). Farmer 2004 Wooden et al. 1993
Phanerozoic Flood Basalts   206Pb/204Pb 18.726         3   Major and trace element compositions as well as selected isotopic composition for Siberian Traps Flood Basalt Gudchikhinsky (Low Ti). Farmer 2004 Wooden et al. 1993
Phanerozoic Flood Basalts   206Pb/204Pb 18.661         13   Major and trace element compositions as well as selected isotopic composition for Parana Flood Basalts in Esmeralda (High Ti). Farmer 2004 Peate 1997
Phanerozoic Flood Basalts   207Pb/204Pb 15.614         31   Major and trace element compositions as well as selected isotopic composition for Columbia River Flood Basalts NW US (High Ti). Farmer 2004 Hooper & Hawkesworth 1993
Phanerozoic Flood Basalts   207Pb/204Pb 15.649         1   Major and trace element compositions as well as selected isotopic composition for Parana Flood Basalts in Gramado (Low Ti). Farmer 2004 Peate 1997
Phanerozoic Flood Basalts   207Pb/204Pb 15.639         1   Major and trace element compositions as well as selected isotopic composition for Parana Flood Basalts in Esmeralda (High Ti). Farmer 2004 Peate 1997
Phanerozoic Flood Basalts   207Pb/204Pb 15.57         3   Major and trace element compositions as well as selected isotopic composition for Siberian Traps Flood Basalt Gudchikhinsky (Low Ti). Farmer 2004 Wooden et al. 1993
Phanerozoic Flood Basalts   207Pb/204Pb 15.57         5   Major and trace element compositions as well as selected isotopic composition for Siberian Traps Flood Basalts Nadezhdinsky (High Ti). Farmer 2004 Wooden et al. 1993
Phanerozoic Flood Basalts   207Pb/204Pb 15.421         18   Major and trace element compositions as well as selected isotopic composition for Deccan Traps Flood Basalts Kolhapur (Low Ti). Farmer 2004 Lightfoot et al. 1990
Phanerozoic Flood Basalts   207Pb/204Pb 15.52         6   Major and trace element compositions as well as selected isotopic composition for Deccan Traps Flood Basalts Mahabaleshwar (High Ti).