GERM Reservoir Database
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GERM Database Search Results        
Reservoir Z Element Value Median SD Low High N Unit Info Reference Source(s)
Acapulcoite Primitive Achondrites 25 Mn 3.26             Trace element compositional data on Acapulcoites. Mittlefehldt 2004 Yanai & Kojima 1991
Zipfel et al. 1995
Active Continental Rifts 25 Mn 0.1           wt%ox 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 25 Mn 0.1           wt%ox Rudnick & Fountain 1995
Ademellites 25 Mn 0.08         113 wt%ox Average major oxide concentration values for Adamellite consolidated from 27 references and 113 analyses. Differentiation index equal to 78.18, Crystallization index equal to 13.54. Le Maitre 1976
AII Fracture Zone Basalts 25 Mn 0.18           wt%ox Average major and minor element values of 9 basalt glass samples from Atlantis II Fracture Zone. These 9 glass samples are specifically from the eastern side of the AII Fracture Zone as given by Johnson and Dick 1992. Hart et al. 1999 Johnson & Dick 1992
Alaska Trench 25 Mn 0.13           wt%ox 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 25 Mn 3350         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 = 0.7 ppm. Altschuller 1980 Aval et al. 1968
Aleutian Basalts 25 Mn 0.16         66 wt% 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 25 Mn 0.15           wt%ox Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
ALH 77005 Meteorite 25 Mn 3470   80       ppm Mars elemental abundances as given by ALH77005 meteorite, which is a lherzolitic shergottite, as given in Lodders 1988. McSween, Jr. 2004 Lodders 1998
ALH 84001 Meteorite 25 Mn 3560   100       ppm Mars elemental abundances as given by ALH84001 meteorite, which is an orthopyroxenite, as given in Lodders 1988. McSween, Jr. 2004 Lodders 1998
ALH 84025 Brachinite 25 Mn 2.53             Trace element compositional data on ALH 84025 Brachinite. Mittlefehldt 2004 Warren & Kallemeyn 1989a
ALHA 77257 Urelite 25 Mn 3.1             Trace element compositional data on ALHA77257 Urelite. Mittlefehldt 2004 Jarosewich 1990
Warren & Kallemeyn 1992
Spitz & Boynton 1991
ALHA 81101 Urelite 25 Mn 2.89             Trace element compositional data on ALHA81101 Urelite. Mittlefehldt 2004 Warren & Kallemeyn 1992
Spitz & Boynton 1991
ALHA77081 Acapulcoite 25 Mn 3.03             Trace element compositional data on Acapulcoite ALHA77081. Mittlefehldt 2004 Schultz et al. 1982
Allende Meteorite 25 Mn 1.42             Concentratons of elements in the Allende chondrites which were determined by both INAA and RNAA. After analyses, the sameples were then prepared in thin section and prepared for optic analyses by electron microprobe. Grossman & Wasson 1985
Amazon River Particulates 25 Mn 1030           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
Amphibolites 25 Mn 0.37         189 wt%ox Average of 165 subsamples and 24 composites. Gao et al. 1998
Andaman Trench 25 Mn 0.09           wt%ox 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 25 Mn 0.12           wt%ox Major element values of the post Archaean Middle and Lower continental crust as estimated by Ewart 1982. The composition of the crust itself is found to be that of an average continental margin orogenic andesite. Major element data was taken from the average values of the Andean andesite from Ewart 1982. Weaver & Tarney 1984 Bailey 1981
Andes Basalt 25 Mn 0.15         56 wt% Average major and trace element values for Andean Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Andesites 25 Mn 0.1         47 wt% 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 25 Mn 0.16         50 wt%ox 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 25 Mn 0.14         2203 wt%ox Average major oxide concentration values for Andesite consolidated from 200 references and 2203 analyses. Differentiation index equal to 51.41, Crystallization index equal to 34.27. Le Maitre 1976
Angrite Angra Dos Reis 25 Mn 0.77             Trace element compositional data on Angra dos Reis Angrite. Mittlefehldt 2004 Mittlefehldt & Lindstrom 1990
Angrite LEW 87051 25 Mn 1.9             Trace element compositional data on Angrite LEW 87051. Mittlefehldt 2004 Mittlefehldt & Lindstrom 1990
Anorthosites 25 Mn 0.05         97 wt%ox Average major oxide concentration values for Anorthosite consolidated from 23 references and 97 analyses. Differentiation index equal to 28.91, Crystallization index equal to 58.00. Le Maitre 1976
Archean Amphibolites 25 Mn 0.04           wt%ox 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 Canadian Shield 25 Mn 0.06           wt%ox Major and minor element composition of the Upper Continental Crust as given by Cameron et al. 1979. Shaw et al. 1986 Cameron et al. 1979
Archean Canadian Shield 25 Mn 0.08           wt%ox Major and minor element composition of the Upper Continental Crust as given by Goodwin 1978. Shaw et al. 1986 Goodwin 1978
Archean Canadian Shield 25 Mn 0.08           wt%ox Major and minor element composition of the Upper Continental Crust as given by Eade and Fahrig 1971. Shaw et al. 1986 Eade & Fahrig 1971
Archean Lower Crust 25 Mn 0.08           wt%ox 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 25 Mn 0.075           wt%ox Major and minor element composition of the Upper Continental Crust as given by Shaw et al. 1967. Shaw et al. 1986 Shaw et al. 1967
Archean Terrains 25 Mn 1500           ppm Taylor & McLennan 1995
Archean Terrains 25 Mn 1400           ppm Taylor & McLennan 1995
Archean Terrains 25 Mn 0.1           wt%ox Rudnick & Fountain 1995
Arenaceous Rocks 25 Mn 0.07         2754 wt%ox Average of 2628 subsamples and 126 composites. Gao et al. 1998
Arenaceous Rocks 25 Mn 0.09         121 wt%ox Average of 110 subsamples and 11 composites. Gao et al. 1998
Ashy Clay 25 Mn 0.65         4 wt%ox 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
Aubres Aubrite 25 Mn 1.486             Trace element compositional data on Aubres Aubrite. Mittlefehldt 2004 Easton 1985
Wolf et al. 1983
Australian Granite 25 Mn 0.07         1074 wt% 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 25 Mn 0.08           wt% 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
Australian Granite 25 Mn 0.02         13 wt% 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 25 Mn 0.06         704 wt% 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 25 Mn 0.1         8 wt% 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 25 Mn 0.07         6 wt% 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
Baldissero Spinel Lherzolites 25 Mn 1046   40     14 ppm Elements analyzed from Baldissero section of Ivrea Complex in Northern Italy. Minor and trace elements analyzed by AAS, INAA, RFA, ICP-AES, ICP-MS, Isotope dilution, Electrometry or Coulometry. Accuracy of all methods checked by USGS reference rocks. Wedepohl & Hartmann 1994
Balmuccia Spinel Lherzolites 25 Mn 1053   39     18 ppm Elements analyzed from Balmuccia section of the Ivrea Complex in Northern Italy. Minor and trace elements analyzed by AAS, INAA, RFA, ICP-AES, ICP-MS, Isotope dilution, Electrometry or Coulometry. Accuracy of all methods checked by USGS reference rocks. Wedepohl & Hartmann 1994
Bambui Group 25 Mn 4200         14 ppm Silty and clayey pelletal phosphorites located in the intra-cratonic basin Bambui group Minas Geraes in Brazil. Arithmetic Average. Detection Limit = 0.7 ppm. Altschuller 1980 Cathcart 1974
Barea Mesosiderite 25 Mn 4.36             Trace element compositional data on Barea Mesosiderite. Mittlefehldt 2004 Mason & Jarosewich 1973
Mittlefehldt in press
Basaltic Glass at ODP/DSDP Site 504 25 Mn 0.17   0.02     51 wt%ox Mean and standard deviation are calculated from 51 basaltic glass analyses excluding anomalously high P and Ti units (see text). Assigned value of average least-altered basalt. Alt et al. 1986
Basalts 25 Mn 0.19         8 wt% Average major and trace element values for SE Australian Dubbo V.F. Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Zhang & O'Reilly 1997
Basalts 25 Mn 0.18         3 wt% 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 25 Mn 0.15         27 wt% 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 25 Mn 0.19         16 wt% Average major and trace element values for European Rhine Graben Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Jung & Hoernes 2000
Basalts 25 Mn 0.14         7 wt% 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 25 Mn 0.16         5 wt% Average major and trace element values for Central Anatolian (Turkey) Late Miocene continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Wilson et al. 1997
Basalts 25 Mn 0.13         10 wt% 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 25 Mn 0.15         3 wt% Average major and trace element values for Central Anatolian (Turkey) Early Miocene continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Wilson et al. 1997
Basalts 25 Mn 0.19         6 wt% Average major and trace element values for West African (Cameroon Line) High Sr Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Marzoli et al. 2000
Basalts 25 Mn 0.15         6 wt% 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 25 Mn 0.17         8 wt% Average major and trace element values for West African (Cameroon Line) Low Sr Cenozoic continental sodic alkali basalt as well as selected elemental and isotopic ratios. Farmer 2004 Marzoli et al. 2000
Basalts 25 Mn 0.18         16 wt% 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 25 Mn 0.2         3156 wt%ox Average major oxide concentration values for Basalt consolidated from 330 references and 3156 analyses. Differentiation index equal to 31.18, Crystallization index equal to 45.19. Le Maitre 1976
Basalts 25 Mn 0.14         13 wt% Average major and trace element compositions for Aegean Sea Dodecanese V.F. Low Ti Cenozoic continental potassic alkali basalt along with selected elemental and isotopic ratio abundances associated with these provinces. Farmer 2004 Robert et al. 1992
Basalts 25 Mn 0.96         4 wt% 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 25 Mn 0.19         44 wt% 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 25 Mn 0.16         9 wt% Average major and trace element values for Vietnamese Tholeiitic Basalts as well as selected elemental and isotopic ratios. Farmer 2004 Hoang & Flower 1998
Basalts 25 Mn 0.18         12 wt% 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 25 Mn 0.16         7 wt% 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 25 Mn 0.2         23 wt% 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
Basanites 25 Mn 0.16         138 wt%ox Average major oxide concentration values for Basanite consolidated from 40 references and 138 analyses. Differentiation index equal to 33.58, Crystallization index equal to 44.58. Le Maitre 1976
Basic Precambrian Granulites 25 Mn 0.21         25 wt%ox Shaw et al. 1986
Battle Creek Formation 25 Mn 480         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 = 0.7 ppm. Altschuller 1980 De Keyser & Cook 1972
Battle Creek Formation 25 Mn 7540         7 ppm Silty aphanitic phosphorites of the intra-cratonic Georgina Basin; Battle formation of Australia. Detection Limit = 0.7 ppm. Altschuller 1980 De Keyser & Cook 1972
Belkinsk Akai Sayan 25 Mn 200         33 ppm Calcareous phosphorites from the Altai-Sayan geosyncline Belkinsk Altai Sayan, Siberia. Detection Limit = 0.7 ppm. Altschuller 1980 Chaikina & Nikolskaya 1970
Binda Eucrite 25 Mn 3.72             Trace element compositional data on Binda Eucrite. Mittlefehldt 2004 Barrat et al. 2000
McCarthy et al. 1973
Bone Valley Formation 25 Mn 230         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 = 0.7 ppm. Altschuller 1980
Boninites 25 Mn 0.15         348 wt% 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
Brachina Brachinite 25 Mn 2.65             Trace element compositional data on Brachina Brachinite. Mittlefehldt 2004 Nehru et al. 1983
Brown Clay 25 Mn 5.27         29 wt%ox The brown clay analyses where averaged over 10 m intervals and then averaged down-unit. Plank & Langmuir 1998
Brown Clay 25 Mn 1.06         4 wt%ox Average of 4 brown clays using DCP analyses. Plank & Langmuir 1998
Brown Rock 25 Mn 1700         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 = 0.7 ppm. Altschuller 1980
Ca-Al-rich Inclusions 25 Mn 0.09           wt%ox Average values of coarse grained CAI's in ordinary chondrites as given in McSween 1977. Values in weight percent per oxide. Bischoff & Keil 1983 McSween 1977
Carbonaceous Chondrites   Cr/Mn 2.2   0.5         Element ratios were determined on relatively unaltered chondritic meteorites including CI, CM, CO, CV and CK. McDonough & Sun 1995
Carbonate 25 Mn 0.53         13 wt%ox 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 25 Mn 0.11         87 wt%ox Average of 87 Cenozoic carbonate turbidites in 100 m of the total of 500 m ODP section. Plank & Langmuir 1998
Carbonates 25 Mn 0.06   0.36     162 wt%ox Average bulk chemical composition of the Albanel carbonates as determined from major element oxides in wt%. Mean values and standard deviations determined by X-Ray Fluoresence Specrometry (XRF) approximating a sandy and/or cherty dolostone. Mirota & Veizer 1994
Carbonates 25 Mn 0.05         50 wt%ox Average of 45 subsamples and 5 composites. Gao et al. 1998
Carbonates 25 Mn 0.06         2038 wt%ox Average of 1922 subsamples and 116 composites. Gao et al. 1998
Cascade Basalt 25 Mn 0.15         60 wt% 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 25 Mn 0.12           wt%ox 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 25 Mn 0.43           wt%ox 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 25 Mn 0.17         78 wt% 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 25 Mn 0.11           wt%ox 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 25 Mn 0.1           wt%ox 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 25 Mn 0.1           wt%ox Compostional estimate of the entire Central East China province. Gao et al. 1998
Central East China Craton 25 Mn 0.12           wt%ox 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 25 Mn 0.13           wt%ox 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 25 Mn 0.1           wt%ox 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 25 Mn 0.15           wt%ox 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 25 Mn 0.1           wt%ox Compostional estimate of the entire Central East China province. Gao et al. 1998
Central East China Craton 25 Mn 0.13           wt%ox 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 25 Mn 0.12           wt%ox Compostional estimate of the entire Central East China province. Average composition of granulite terrains. Gao et al. 1998
Central East China Craton 25 Mn 0.09           wt%ox Compostional estimate of the entire Central East China province. Includes sedimentary carbonates. Gao et al. 1998
Chassigny Achondrite 25 Mn 0.51   0.005       wt%ox Elemental abundances of the Chassigny Meteorite which is a urelite achondrite. Abundances were determined by Instrumental Neutron Activation Analysis and also Radiochemical Neutron Activation Analysis in order to attain more precise data for REEs. Boynton et al. 1976
Chassigny Meteorite 25 Mn 4120   840       ppm Mars elemental abundances as given by Chassigny meteorite (chassignite) as given in Lodders 1988. McSween, Jr. 2004 Lodders 1998
Chaunskij Mesosiderite 25 Mn 2.31             Trace element compositional data on Chaunskij Mesosiderite. Mittlefehldt 2004 Mittlefehldt in press
Petaev et al. 2000
Chert 25 Mn 0.23         4 wt%ox 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 25 Mn 0.31         4 wt%ox 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 25 Mn 0.22           wt%ox 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
CI Chondrites   Cr/Mn 1.4             Element ratios were determined on relatively unaltered chondritic meteorites. McDonough & Sun 1995
CI Chondrites 25 Mn 0.256           wt%ox Model compositions for Earth's Primitive mantle as based on C1 Chondrite compositions analyzed by various sources. McDonough & Frey 1989 Palme et al. 1981
Anders & Ebihara 1982
Beer et al. 1984
Jochum et al. 1986
CI Chondrites 25 Mn 1900           ppm 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 25 Mn 1933   57.99       ppm Abundance of elements in the solar system based off of Palme & Beer 1993 study of CI meteorites. Palme & Jones 2004 Palme & Beer 1993
CI Chondrites 25 Mn 1990           ppm Abundance of elements in the solar system from Anders & Grevesse 1989 study of CI meteorites. Palme & Jones 2004 Anders & Grevesse 1989
CI Chondrites 25 Mn 1.82           ppm 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 25 Mn 1933   57.99       ppm 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 25 Mn 1990   191     20 ppm 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 25 Mn 5.51   0.01         CI Meteorite derived solar system abundances of various elements. Palme & Jones 2004
CI Chondrites 25 Mn 1920           ppm Based on measurements on 3 out of 5 carbonaceous chrondrites namely Orgueil, Ivuna and Alais. McDonough & Sun 1995
Clastic Turbidites 25 Mn 0.12         28 wt%ox 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
CO Chondrites 25 Mn 0.27   0.04     36 wt% Major element oxide composition of interstitial matrix of 3 areas of ALHA77307. All interstitial matricies analyzed by Electron Microprobe and normalized to 100%. Scott & Krot 2004 Brearley 1993
Greshake 1997
CO Chondrites 25 Mn 0.16   0.05     106 wt% Major element oxide composition of matrix rims of 8 chondrules of ALHA77307. All matrix rims analyzed by Electron Microprobe and normalized to 100%. Scott & Krot 2004 Brearley 1993
Greshake 1997
CO Chondrites 25 Mn 0.24   0.2     8 wt% Major element oxide composition of amorphous phase of ALHA77307 (CO3.0 chondrite). All amorphous phases analyzed by Analytical transmission electron microscopy and normalized to 100%. Scott & Krot 2004 Brearley 1993
Greshake 1997
CO Chondrites 25 Mn 0.6   0.2     6 wt% Major element oxide composition of amorphous phase of the ungrouped Acfer 094 chondrite. All amorphous phases analyzed by Analytical transmission electron microscopy and normalized to 100%. Scott & Krot 2004 Brearley 1993
Greshake 1997
Colombia Trench 25 Mn 0.14           wt%ox Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 3 or moderate. Plank & Langmuir 1998
Colorado River Particulates 25 Mn 430           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
Comet Halley 25 Mn 5.28   0.15         Logarithmic abundance relative to log N(H) = 12.00. Normalized to Mg = 7.58. This estimates combines the measurement of both the dust and gas components in the comet Halley. Anders & Grevesse 1989 Jessberger et al. 1988
Congo River Particulates 25 Mn 1400           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 25 Mn 0.17         497 wt% 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 25 Mn 0.12         142 wt% 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 Xenoliths 25 Mn 0.13 0.13 0.03     28   Mean and median whole rock composition of Continental Arc Xenoliths as based on Major/Minor element compositions and specific elemental ratios. Pearson et al. 2004
Continental Arcs 25 Mn 0.1           wt%ox 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 Arcs 25 Mn 0.1           wt%ox Rudnick & Fountain 1995
Continental Crust   Hg/Mn 9.2e-06             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 25 Mn 0.11           wt%ox Rudnick & Fountain 1995
Continental Crust 25 Mn 1400           ppm Taylor & McLennan 1995
Continental Crust 25 Mn 716           ppm UCC = Shaw et al. (1967;1976); LCC = Rudnick & Presper (1990) in the proportions of Figure 2. Wedepohl 1995
Continental Crust 25 Mn 0.09           wt%ox 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 25 Mn 0.08           wt%ox 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 25 Mn 756           ppm Bulk continental crust concentrations of minor and trace elements as based on Wedepohl 1991 and considering a Upper to Lower crust ratio of 43:57 respectively. Wedepohl & Hartmann 1994 Wedepohl 1991
Continental Crust 25 Mn 0.1           wt%ox 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 25 Mn 0.14           wt%ox 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 25 Mn 0.1           wt%ox Estimates of the major element composition of the continental crust derived from various sources. According to these estimates the continental crust is said to have an intermediate chemical composition. Weaver & Tarney 1984 Taylor 1964
Continental Crust 25 Mn 0.1           wt%ox Estimates of the major element composition of the continental crust derived from various sources. According to these estimates the continental crust is said to have an intermediate chemical composition. Weaver & Tarney 1984 Ronov & Yaroshevskiy 1969
Continental Crust 25 Mn 0.1           wt%ox Estimates of the major element composition of the continental crust derived from various sources. According to these estimates the continental crust is said to have an intermediate chemical composition. Weaver & Tarney 1984 Holland & Lambert 1972
Continental Crust 25 Mn 1400           ppm 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 25 Mn 0.1           wt% 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 25 Mn 0.09           wt% 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 25 Mn 0.1           wt% 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 25 Mn 0.1           wt% Major and trace element compositional estimates of the Bulk Continental Crust given by Christensen and Mooney 1995. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Christensen & Mooney 1995
Continental Crust 25 Mn 0.11           wt% 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 25 Mn 0.1           wt% 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 25 Mn 0.12           wt% 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 25 Mn 0.12           wt% 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 25 Mn 0.18           wt% 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 25 Mn 0.1           wt% Major and trace element compositional estimates of the Bulk Continental Crust given by Ronov and Yaroshevsky 1967. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Ronov & Yaroshevsky 1967
Continental Crust 25 Mn 0.1           wt% Major and trace element compositional estimates of the Bulk Continental Crust given by Holland and Lambert 1972. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Holland & Lambert 1972
Continental Crust 25 Mn 0.1           wt% Rudnick & Gao 2004
Continental Crust 25 Mn 0.1           wt% Major and trace element compositional estimates of the Bulk Continental Crust given by Smithson 1978. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Smithson 1978
Continental Crust 25 Mn 0.08           wt% 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 Intraplate Peridotite 25 Mn 0.19           wt% Major element mineral chemical data for a garnet mineral sample in a Russian peridotite xenolith from spinel-garnet to garnet facies. Pearson et al. 2004 Ionov 1996
Continental Intraplate Peridotite 25 Mn 0.1           wt% Major element mineral chemical data for a orthopyroxene mineral sample in a Australian peridotite xenolith from spinel facies. Pearson et al. 2004 Canil & O'Neill 1996
Continental Intraplate Peridotite 25 Mn 0.15           wt% Major element mineral chemical data for a orthopyroxene mineral sample in a Antarctic peridotite xenolith from plagioclase-spinel facies. Pearson et al. 2004 Zipfel & Worner 1992
Continental Intraplate Peridotite 25 Mn 0.05           wt% Major element mineral chemical data for a clinopyroxne mineral sample in a Australian peridotite xenolith from spinel rock facies. Pearson et al. 2004 Canil & O'Neill 1996
Continental Intraplate Peridotite 25 Mn 0.15           wt% Major element mineral chemical data for a Clinopyroxene mineral in an Antarctic peridotite xenolith from plagioclase-spinel facies. Pearson et al. 2004 Zipfel & Worner 1992
Continental Intraplate Peridotite 25 Mn 0.1           wt% Major element mineral chemical data for a spinel mineral sample in an Antarctic peridotite xenolith from plagioclase-spinel facies. Pearson et al. 2004 Zipfel & Worner 1992
Continental Intraplate Peridotite 25 Mn 0.24           wt% Major element mineral chemical data for a garnet mineral sample in a Russian peridotite xenolith from spinel-garnet to garnet facies. Pearson et al. 2004 Ionov 1996
Continental Intraplate Peridotite 25 Mn 0.24           wt% Major element mineral chemical data for a garnet mineral sample in a Russian peridotite xenolith from spinel-garnet to garnet facies. Pearson et al. 2004 Ionov 1996
Continental Intraplate Peridotite 25 Mn 0.33           wt% Major element mineral chemical data for a garnet mineral sample in a Russian peridotite xenolith from spinel-garnet to garnet facies. Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths 25 Mn 0.13 0.13 0.03     273   Mean and median whole rock composition of Continental Intraplate Xenoliths as based on Major/Minor element compositions and specific elemental ratios. Pearson et al. 2004
Continental Rift Xenoliths 25 Mn 0.13 0.13 0.01     23   Mean and median whole rock composition of Continental Rift Xenoliths as based on Major/Minor element compositions and specific elemental ratios. Pearson et al. 2004
Continental Shields & Platforms 25 Mn 0.1           wt%ox Rudnick & Fountain 1995
Continental Shields & Platforms 25 Mn 0.1           wt%ox 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   Cr/Mn       1.8 1.8     Limits on the composition of the core assuming that between 5% and 15% of the light elements reside in the Earth's core. Model based on the silicate Earth estimates from Table 5. McDonough & Sun 1995
Core 25 Mn 50           µg/g Compostioinal models for the bulk Earth, core and silicate Earth are modified after McDonough & Sun (1995). McDonough 1998
Core 25 Mn       0.45 0.5   wt% Limits on the composition of the core assuming that between 5% and 15% of the light elements reside in the Earth's core. Model based on the silicate Earth estimates from Table 5. McDonough & Sun 1995
Core 25 Mn 300           ppm Elemental composition of the Earth's core as given in ppm unless stated as wt. %. McDonough 2004
Core 25 Mn 0.03           wt% Major element composition of the Earth Core. McDonough 2004
Core 25 Mn 5820           ppm Renormalized elemental compositions of the Earth's Core given in ppm. These compositions were obtained by using elemental ratio diagrams to extract values for each particular element then using those values in a series of equations derived by the authors. Allegre et al. 1995
Cratonic Peridotite 25 Mn 0.22           wt% Major element mineral chemical data for a garnet mineral sample in an African craton peridotite xenolith from spinel-garnet to garnet facies. Pearson et al. 2004 Smith et al. 1991
Cratonic Xenoliths 25 Mn 0.14 0.13 0.04     232   Mean and median whole rock composition of Cratonic Xenoliths as based on Major/Minor element compositions and specific elemental ratios. Pearson et al. 2004
D'Orbigny Angrite 25 Mn 2.2             Trace element compositional data on D'Orbigny Angrite. Mittlefehldt 2004 Mittlefehldt et al. 2002
Dacites 25 Mn 0.09         578 wt%ox Average major oxide concentration values for Dacite consolidated from 80 references and 578 analyses. Differentiation index equal to 67.62, Crystallization index equal to 23.17. Le Maitre 1976
Danube River Particulates 25 Mn 600           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 25 Mn 0.13           wt% Bulk major element composition of DMM (Depleted MORB Mantle) as averaged from the previous mineral composition measurements and normalized to 100%. Workman & Hart 2005
Depleted Mantle 25 Mn 1045   177.65       ppm Estimate for the concentrations in the Depleted Mantle of most of the elements of the Periodic Table.  Fe/Mn is the element ratio used to make this estimate. Salters & Stracke 2004
Depleted MORB Mantle Clinopyroxene 25 Mn 0.09           wt% Major element composition of DMM (Depleted MORB Mantle) as measured from Cpx. All mineral compositions normalized to 100%. Workman & Hart 2005
Depleted MORB Mantle Olivine 25 Mn 0.14           wt% Major element composition of DMM (Depleted MORB Mantle) as measured from Olivine. All mineral compositions normalized to 100%. Workman & Hart 2005
Depleted MORB Mantle Orthopyroxene 25 Mn 0.12           wt% Major element composition of DMM (Depleted MORB Mantle) as measured from Opx. All mineral compositions normalized to 100%. Workman & Hart 2005
Depleted MORB Mantle Spinel 25 Mn 0.16           wt% Major element composition of DMM (Depleted MORB Mantle) as measured from Spinel. All mineral compositions normalized to 100%. Workman & Hart 2005
Diatom Oozes & Clay 25 Mn 0.06         15 wt%ox Weighted average based on DCP analyses for 200 m of diatom oozes. Plank & Langmuir 1998
Diatome Clay 25 Mn 0.31         6 wt%ox Upper 240 m of a total section that is 335 m thick (Site 581) dominated by diatom clay. Plank & Langmuir 1998
Diatome Mud 25 Mn 0.14         6 wt%ox 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 25 Mn 0.2         4 wt%ox 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
Diorite 25 Mn 0.13         260 wt%ox Average of 243 subsamples and 17 composites. Gao et al. 1998
Diorites 25 Mn 0.12         755 wt%ox Average major oxide concentration values for Diorite consolidated from 141 references and 755 analyses. Differentiation index equal to 50.66, Crystallization index equal to 32.87. Le Maitre 1976
Dolerites 25 Mn 0.19         687 wt%ox Average major oxide concentration values for Dolerite consolidated from 99 references and 687 analyses. Differentiation index equal to 29.15, Crystallization index equal to 44.56. Le Maitre 1976
Dover Sandstone 25 Mn 750         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 = 0.7 ppm. Altschuller 1980 Cathcart & Schmidt 1974
DSDP/ODP Site 800 25 Mn 0.21           wt%ox 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 25 Mn 0.19           wt%ox 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 25 Mn 0.21           wt%ox Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Dunites 25 Mn 0.71         78 wt%ox Average major oxide concentration values for Dunite consolidated from 35 references and 78 analyses. Differentiation index equal to 2.16, Crystallization index equal to 67.05. Le Maitre 1976
E-MORB 25 Mn 0.16           wt% 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
Earth 25 Mn 0.06           ppm Model composition of the Earth as first noted by Ganapathy & Anders 1974.  The values are notably less for the 'cosmic' elements than that of the chondrites and eucrites which of course is to be expected, and enriched in the more terrestrial elements. Morgan et al. 1978 Ganapathy & Anders 1974
East China Craton 25 Mn 0.12           wt%ox 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 25 Mn 0.11           wt%ox 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 25 Mn 0.36           wt%ox Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
EET 83309 Urelite 25 Mn 2.88             Trace element compositional data on EET 83309 Urelite. Mittlefehldt 2004 Warren & Kallemeyn 1989b
EET 84302 Acapulcoite 25 Mn 4.1             Trace element compositional data on achondrite EET84302 which is between Acapulcoite and lodranite. Mittlefehldt 2004 Weigel et al. 1999
Enstatite Chondrites   Cr/Mn 1.54   0.13         Element ratios were determined on relatively unaltered chondritic meteorites including EL and EH. McDonough & Sun 1995
Eucrites 25 Mn 0.01           ppm Model composition of the Eucrite Parent body as found in this study (Morgan et al. 1978). These are basically just single element compositions of eucrites, which will be compared to other models that correlate to the values of Eucrites yet are representaive of similar yet different groups of material from the solar system. Morgan et al. 1978
Felsic Archean Granulites 25 Mn 0.05 0.04       348 wt%ox Median values are used instead of average values in the model calculations to avoid outlyers of small sample populations. Rudnick & Fountain 1995
Felsic Granulites 25 Mn 0.08         137 wt%ox Average of 116 subsamples and 21 composites. Gao et al. 1998
Felsic Post-Archean Granulites 25 Mn 0.07 0.05       220 wt%ox Median values are used instead of average values in the model calculations to avoid outlyers of small sample populations. Rudnick & Fountain 1995
Felsic Volcanics 25 Mn 0.08         972 wt%ox Average of 895 subsamples and 77 composites. Gao et al. 1998
Ferruginous Clay 25 Mn 0.17         2 wt%ox 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
Frankfort Howardites 25 Mn 4.34             Trace element compositional data on Frankfort Howardite. Mittlefehldt 2004 McCarthy et al. 1972
Palme et al. 1978
Fresh Mid-Ocean Ridge Basalts 25 Mn 0.16         203 wt% 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 25 Mn 0.15           wt% Analyses on MORB glasses from the Indian Ocean as given by Klein et al. 1991. Klein 2004 Klein et al. 1991
Gabbros 25 Mn 0.12           wt%ox Wedepohl 1995 Le Maitre 1976
Gabbros 25 Mn 0.12         1317 wt%ox Average major oxide concentration values for Gabbro consolidated from 173 references and 1317 analyses. Differentiation index equal to 26.46, Crystallization index equal to 48.34. Le Maitre 1976
Ganges River Particulates 25 Mn 1000           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
Garnet Peridotites   Fe/Mn 63   11         McDonough 1991
Garnet Peridotites 25 Mn   0.11         wt%ox McDonough 1991 Maaloe & Aoki 1975
Jordan 1979
Boyd 1989
McDonough 1990
Garnet Peridotites 25 Mn 0.11           wt%ox Average major oxide composition of Garnet Peridotites from Maaloe and Aoki 1975. Values mainly used for comparison to compsitions gathered by McDonough in his study to show no significant differences between prior and current averages. McDonough 1990 Maaloe & Aoki 1975
Garnet Peridotites 25 Mn 0.11           wt%ox Average major oxide composition of Garnet Peridotite xenoliths from Jordan 1979. Values mainly used for comparison to compsitions gathered by McDonough in his study to show no significant differences between prior and current averages. McDonough 1990 Jordan 1979
Garonne River Particulates 25 Mn 1700           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
Gibson Lodranite 25 Mn 4.2             Trace element compositional data on Gibson Lodranite. Mittlefehldt 2004 Weigel et al. 1999
Goalpara Ureilite 25 Mn 0.372   0.006       wt%ox Elemental abundances of the Goalpara Meteorite which is a urelite achondrite. Abundances were determined by Instrumental Neutron Activation Analysis and also Radiochemical Neutron Activation Analysis in order to attain more precise data for REEs. Boynton et al. 1976
Granites 25 Mn 0.04           wt%ox I and S type felsic Granites that comprise the melt fraction. Wedepohl 1995 Whalen et al. 1987
Granites 25 Mn 0.03         402 wt%ox Average of 369 subsamples and 33 composites. Gao et al. 1998
Granites 25 Mn 0.04         1226 wt%ox Average of 1140 subsamples and 86 composites. Gao et al. 1998
Granites 25 Mn 0.02         8 wt% 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 25 Mn 0.05           wt% 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 25 Mn 0.05         2236 wt%ox Average major oxide concentration values for Granite consolidated from 197 references and 2236 analyses. Differentiation index equal to 84.24, Crystallization index equal to 9.27. Le Maitre 1976
Granodiorites 25 Mn 0.08         723 wt%ox Average major oxide concentration values for Granodiorite consolidated from 125 references and 723 analyses. Differentiation index equal to 70.20, Crystallization index equal to 20.38. Le Maitre 1976
Granodiorites 25 Mn 0.08           wt%ox Wedepohl 1995 Le Maitre 1976
Granulites 25 Mn 0.08           wt%ox 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 25 Mn 0.11 0.1       592 wt%ox Average of granulite facies terrains. Rudnick & Presper 1990
Granulites 25 Mn 0.09 0.07       614 wt%ox Average of granulite facies terrains. Rudnick & Presper 1990
Granulitic Xenolites 25 Mn 0.15 0.14       334 wt%ox Average of granulite facies xenoliths. Rudnick & Presper 1990
Greater Antilles Basalt 25 Mn 0.2         21 wt% 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 25 Mn 0.08         3 wt%ox 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
Greywackes 25 Mn 0.1           wt%ox Total average of group averages from USA, Canada, Australia, Sri Lanka and Germany using an equal statistical weight. Wedepohl 1995
Group 1 Lunar Crystalline Rocks 25 Mn 0.24         6 wt%ox Average of 6 Literature studies including this study on Major and Minor elements of six Lunar crystalline rocks samples 10017, 10022, 10024, 10049, 10057, 10072. Compston et al. 1970
Group 1 Lunar Crystalline Rocks 25 Mn 0.25         6 wt%ox Averages of Major and Minor element analyses in Lunar crystalline rock samples using X-Ray fluorescence spectrometry. Compston et al. 1970
Group 2 Lunar Crystalline Rocks 25 Mn 0.29         8 wt%ox Average of Major and Minor element analyses of Group 2 Lunar crystalline rocks using X-ray fluorescence spectrometry. Compston et al. 1970
Group 2 Lunar Crystalline Rocks 25 Mn 0.27         8 wt%ox Average of 7 literature studies including this study on Major and minor elements of 8 samples of Lunar Crystalline rocks; 10003, 10070, 10044, 10045, 10047, 10050, 10058, 10062. Compston et al. 1970
H Ordinary Chondrites 25 Mn 0.23           ppm Model composition of H-Chondrites as found by Mason 1965.  These values correlate to those found by Morgan et al. 1978 for the Eucrite parent body, which is the norm for these types of materials (chondrites). The match is not perfect however, seeing that the H-chondrites are obviously more abundant in the involatile elements and metals due to their cosmic origins. Morgan et al. 1978 Mason 1965
Harzburgites 25 Mn 0.15         199 wt%ox Average major oxide concentration values for Harzburgite consolidated from 18 references and 199 analyses. Differentiation index equal to 3.43, Crystallization index equal to 66.60. Le Maitre 1976
Havero Urelite 25 Mn 2.66             Trace element compositional data on Havero Urelite. Mittlefehldt 2004 Wanke et al. 1972
Hawaiites 25 Mn 0.19         58 wt%ox Average major oxide concentration values for Hawaiite consolidated from 13 references and 58 analyses. Differentiation index equal to 42.64, Crystallization index equal to 36.02. Le Maitre 1976
Honshu Basalt 25 Mn 0.16         137 wt% Average major and trace element values for Honshu Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Hydrothermal Sediment 25 Mn 9.28         4 wt%ox Average of 4 hydrothermal sediments or clays using DCP analyses. Plank & Langmuir 1998
IAB Campo del Cielo 25 Mn 2.3             Trace element compositional data on IAB from Campo del Cielo. Mittlefehldt 2004 Bild 1977
IAB Landes 25 Mn 2.19             Trace element compositional data on IAB from Landes. Mittlefehldt 2004 Bild 1977
IAB Udei Station 25 Mn 2.37             Trace element compositional data on IAB from Udei Station. Mittlefehldt 2004 Kallemeyn & Wasson 1985
Ibitira Eucrite 25 Mn 3.72             Trace element compositional data on Ibitira Eucrite. Mittlefehldt 2004 Jarosewich 1990
Barrat et al. 2000
Igneous Rocks 25 Mn 0.14         22775 wt%ox Average major oxide concentration values for Igneous rocks consolidated from 967 references and 22,775 analyses. Differentiation index equal to 51.81, Crystallization index equal to 30.82. Le Maitre 1976
Interior North China Craton 25 Mn 0.14           wt%ox Compostional estimate of the interior of the North China craton. Average compostion of granulite terrains. Gao et al. 1998
Interior North China Craton 25 Mn 0.11           wt%ox 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 25 Mn 0.09           wt%ox 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 25 Mn 0.09           wt%ox Compostional estimate of the interior of the North China craton. Gao et al. 1998
Interior North China Craton 25 Mn 0.1           wt%ox Compostional estimate of the interior of the North China craton. Includes sedimentary carbonates. Gao et al. 1998
Interlayerd Clay & Chert 25 Mn 0.07         2 wt%ox 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 25 Mn 0.03         5 wt%ox 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 Clay & Chert 25 Mn 1.95         12 wt%ox 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 25 Mn 0.12         136 wt%ox Average of 115 subsamples and 21 composites. Gao et al. 1998
Intermediate Mafic Archean Granulites 25 Mn 0.11 0.1       102 wt%ox 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 25 Mn 0.13 0.13       47 wt%ox 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 25 Mn 0.14 0.13       132 wt%ox 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 25 Mn 0.14         26 wt%ox Shaw et al. 1986
Intra Stellar Medium 25 Mn 4.08   0.204         Abundance of moderately 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 25 Mn 0.14         32 wt% 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 25 Mn 0.17         503 wt% 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 Arcs 25 Mn 1100           ppm Taylor & McLennan 1995
Island Arcs 25 Mn 0.08         323 wt% 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 25 Mn 0.36           wt%ox 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 25 Mn 0.42           wt%ox 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 25 Mn 0.42           wt%ox Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Johnstown Diogenite 25 Mn 3.75             Trace element compositional data on Johnstown Diogenite. Mittlefehldt 2004 Wanke et al. 1977
Kamchatka Basalt 25 Mn 0.17         78 wt% 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 25 Mn 0.11           wt%ox Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 3 or moderate. Plank & Langmuir 1998
Kapoeta Howardites 25 Mn 3.83             Trace element compositional data on Kapoeta Howardite. Mittlefehldt 2004 Wanke et al. 1972
Kenna Ureilite 25 Mn 0.367   0.006       wt%ox Elemental abundances of the Kenna Meteorite which is a urelite achondrite. Abundances were determined by Instrumental Neutron Activation Analysis and also Radiochemical Neutron Activation Analysis in order to attain more precise data for REEs. Boynton et al. 1976
Kerm Trench 25 Mn 0.85           wt%ox 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 25 Mn 0.16         36 wt% Average major and trace element values for Kermadec Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Kimberlite 25 Mn 0.17         22 wt% Average major and trace element composition and selected isotopic ratio data for Koidu Kimberlites from Sierra Leone. Farmer 2004 Taylor et al. 1994
Kimberlite 25 Mn 0.2         35 wt% Average major and trace element composition and selected isotopic ratio data for Group 1A Kimberlites which are representative of a global average. Farmer 2004 Taylor et al. 1994
Kimberlite 25 Mn 0.2         32 wt% Average major and trace element composition and selected isotopic ratio data for Micaceous kimberlites which represent a model for global average. Farmer 2004 Taylor et al. 1994
Komatiites   Fe/Mn 56             McDonough 1991
Kuriles Trench 25 Mn 0.42           wt%ox 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 25 Mn 2000         5 ppm Phosphatic sandstones and shales, near shore deltaic and littoral sediments of Kyzyl Kum, Uzbekistan, P2O5: >10%. Detection Limit = 0.7 ppm. Altschuller 1980 Kapustyanski 1964
La Caja Formation 25 Mn 190         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 = 0.7 ppm. Altschuller 1980 Rogers et al. 1956
Latites 25 Mn 0.09         146 wt%ox Average major oxide concentration values for Latite consolidated from 46 references and 146 analyses. Differentiation index equal to 68.49, Crystallization index equal to 20.89. Le Maitre 1976
Least-Altered Basalt at ODP/DSDP Site 504 25 Mn 0.17   0.02     58 wt%ox Mean and standard deviation are calculated from 58 least-altered basalt analyses from the pillow section, based on K2O contents less than 0.10% and calculated on a water free basis. The analyses does not include anomalously high P and Ti units (see text). Alt et al. 1986
Lesser Antilles Basalt 25 Mn 0.17         84 wt% Average major and trace element values for Lesser Antilles Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Leucitic Basalt 25 Mn 0.19           wt% XRF elemental analysis of Venus' surface  given in mass percent as calculated from Leucitic Basalt samples. Fegley, Jr. 2004 Volkov et al. 1986
Lherzolites 25 Mn 0.17         177 wt%ox Average major oxide concentration values for Lherzolite consolidated from 16 references and 177 analyses. Differentiation index equal to 6.16, Crystallization index equal to 66.06. Le Maitre 1976
LL Ordinary Chondrites 25 Mn 2.53             Concentratons of elements in mean LL chondrites which were determined by both INAA and RNAA. After analyses, the sameples were then prepared in thin section and prepared for optic analyses by electron microprobe. Grossman & Wasson 1985
Low Si-Mg Mantle 25 Mn 0.13           wt% LOSIMAG (LOw SIlicon MAGnesisum) C1 model of fertile upper mantle compositions given by Hart and Zindler 1986. Walter 2004 Hart & Zindler 1986
Lower Continental Crust 25 Mn 0.12           wt%ox Balance of residual rocks after 30% partial melting of the felsic lower crust, assuming that I and S type felsic granites represent the melt fraction. Wedepohl 1995
Lower Continental Crust 25 Mn 0.15           wt% 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 25 Mn 0.1           wt%ox Rudnick & Fountain 1995
Lower Continental Crust 25 Mn 0.22           wt% 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 25 Mn 0.16           wt% 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 25 Mn 0.1           wt% 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 25 Mn 0.17           wt%ox 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 25 Mn 929           ppm LCC = Rudnick & Presper (1990) in the proportions of Fig 2 Wedepohl 1995
Lower Continental Crust 25 Mn 1700           ppm Taylor & McLennan 1995
Lower Continental Crust 25 Mn 0.1           wt% 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 25 Mn 0.12           wt%ox 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 25 Mn 0.08           wt% 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 25 Mn 0.1           wt% 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 25 Mn 0.12           wt% 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 25 Mn 0.22           wt% 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 25 Mn 0.16           wt% 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 25 Mn 0.1           wt% Major and trace element compositional estimates of the lower continental crust as given by Villaseca et al. 1999 using lithologic proportions of lover crustal xenoliths from Central Spain. Major element oxides are given in wt.% and trace elements in either ng/g or ¿g/g. Rudnick & Gao 2004 Villaseca et al. 1999
Lower Continental Crust 25 Mn 0.08           wt% 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 25 Mn 0.12           wt% 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
Lujavrites 25 Mn 0.46         76 wt%ox Average major oxide concentration values for Lujavrite consolidated from 6 references and 76 analyses. Differentiation index equal to 64.78, Crystallization index equal to 5.01. Le Maitre 1976
Lunar Breccias 25 Mn 0.23         6 wt%ox Average of 3 Literature sources including this study on the same Lunar Breccia samples; 10018, 10019, 10048, 10056, 10060, 10061. Compston et al. 1970
Lunar Breccias 25 Mn 0.22         2 wt%ox Average of major and minor element analyses of Lunar Breccias by X-ray fluorescence spectrometry. Compston et al. 1970
Lunar Soil 25 Mn 0.21         1 wt%ox Average of 6 literature sources including this study on Lunar Soil sample 10084. Undoubtedly from polygenetic origin, it is highly believed that the soil samples are a combination of Group 1 and Group 2 rocks.  Contributions from meteorites could be the reason the soils and breccias have higher than normal nickel and zinc contents and it has been found according to Keays et al. 1970 that the soils contain at most a 2% mix of carbonaceous chondrite material.  Compston et al. 1970
Luzon Basalt 25 Mn 0.18         24 wt% Average major and trace element values for Luzon Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
MAC 88177 Lodranite 25 Mn 4.1             Trace element compositional data on Lodranite MAC 88177. Mittlefehldt 2004 Weigel et al. 1999
Macibini Eucrites 25 Mn 4.17             Trace element compositional data on Macibini Eucrite. Mittlefehldt 2004 McCarthy et al. 1973
Buchanan et al. 2000b
MacKenzie River Particulates 25 Mn 600           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 25 Mn 0.19 0.2       96 wt%ox Median values are used instead of average values in the model calculations to avoid outlyers of small sample populations. Rudnick & Fountain 1995
Mafic Granulites 25 Mn 0.22         128 wt%ox Average of 93 subsamples and 35 composites. Gao et al. 1998
Mafic Granulitic Xenolites 25 Mn 0.15 0.15       255 wt%ox Median values are used instead of average values in the model calculations to avoid outlyers of small sample populations. Rudnick & Fountain 1995
Mafic Intrusions 25 Mn 0.15         308 wt%ox Average of 276 subsamples and 32 composites. Gao et al. 1998
Mafic Post-Archean Granulites 25 Mn 0.19 0.18       95 wt%ox Median values are used instead of average values in the model calculations to avoid outlyers of small sample populations. Rudnick & Fountain 1995
Makran Trench 25 Mn 0.64           wt%ox Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 3 or moderate. Plank & Langmuir 1998
Malvern Howardites 25 Mn 4.06             Trace element compositional data on Malvern Howardite. Mittlefehldt 2004 Palme et al. 1978
Manganese Nodules 25 Mn 186000           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
Mantle 25 Mn 0.1           wt% Major element composition of the Earth Mantle. McDonough 2004
Mantle Xenoliths 25 Mn 0.14           wt% Major and minor element compositional averages in Xenolith mantle models. Pearson et al. 2004 McDonough 1990
Marianas Basalt 25 Mn 0.15         168 wt% 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 25 Mn 0.21           wt%ox 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 25 Mn 20           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 25 Mn 6700           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
Marine Pelagic Clay 25 Mn 6700           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 25 Mn 1230 200   8 7540 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 25 Mn 850           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
Marine Shales 25 Mn 850           ppm Concentrations of trace elements in shale as given by Turekian and Wedepohl 1961. Altschuller 1980 Turekian & Wedepohl 1961
Mars Mantle 25 Mn 0.37           wt% Major element oxide composition of the Martian mantle given in weight percent from Lodders & Fegley 1997. McSween, Jr. 2004 Lodders & Fegley 1997
Mars Mantle 25 Mn 0.4           wt% Major element oxide composition of the Martian mantle given in weight percent from Sanloup 1999. McSween, Jr. 2004 Sanloup 1999
Mars Mantle 25 Mn 0.5           wt% Major element oxide composition of the Martian mantle given in weight percent from Wanke & Dreibus 1998. McSween, Jr. 2004 Wanke & Dreibus 1988
Mars Rocks 25 Mn 0.49   0.1225       wt% Mars major element rock composition as analyzed by the A-17 sample from the Mars Pathfinder. McSween, Jr. 2004 Wanke et al. 2001
Mars Rocks 25 Mn 0.55   0.1375       wt% Mars major element rock composition as analyzed by the Dust-free sample from the Mars Pathfinder. McSween, Jr. 2004 Wanke et al. 2001
Mars Rocks 25 Mn 0.52   0.13       wt% Mars major element rock composition as analyzed by the A-18 sample from the Mars Pathfinder. McSween, Jr. 2004 Wanke et al. 2001
Mars Rocks 25 Mn 0.65   0.1625       wt% Mars major element rock composition as analyzed by the A-16 sample from the Mars Pathfinder. McSween, Jr. 2004 Wanke et al. 2001
Mars Rocks 25 Mn 0.47   0.1175       wt% Mars major element rock composition as analyzed by the A-7 sample from the Mars Pathfinder. McSween, Jr. 2004 Wanke et al. 2001
Mars Soil 25 Mn 0.46   0.115       wt% Mars major element soil composition as analyzed by the A-15 soil sample from the Mars Pathfinder. McSween, Jr. 2004 Wanke et al. 2001
Mars Soil 25 Mn 0.51   0.1275       wt% Mars major element soil composition as analyzed by the A-10 soil sample from the Mars Pathfinder. McSween, Jr. 2004 Wanke et al. 2001
Mars Soil 25 Mn 0.34   0.085       wt% Mars major element soil composition as analyzed by the A-5 soil sample from the Mars Pathfinder. McSween, Jr. 2004 Wanke et al. 2001
Mars Soil 25 Mn 0.76   0.19       wt% Mars major element soil composition as analyzed by the A-4 soil sample from the Mars Pathfinder. McSween, Jr. 2004 Wanke et al. 2001
Mavic Volcanics 25 Mn 0.17         632 wt%ox Average of 538 subsamples and 49 composites. Gao et al. 1998
Mead Peak Phosphatic Shale Member 25 Mn 0.003         41 ppm Average phosphorite of Meade Peak Phosphatic Shale member of Phosphoria Formation. Modal values used for minor elements. Gulbrandsen 1966
Mekong River Particulates 25 Mn 940           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
Mercury Crustal Silicates 25 Mn 0.1           wt% Models of the bulk chemical composition of the silicate portion of Mercury given in wt%. These values are derived from the average of skeletal olivine and cryptocrystalline chondrules in metal-rich chondrites. Taylor & Scott 2004 Krot et al. 2001
Mercury Crustal Silicates 25 Mn 0.06           wt% Models for bulk chemical composition of Mercury using three surface magma compositions. Calculated 10% partial melt at 10 kbar of the bulk composition given by Morgan & Anders 1980. Taylor & Scott 2004 Morgan & Anders 1980
Mercury Crustal Silicates 25 Mn 0.12           wt% Models for the bulk chemical composition of Mercury using surface magma compositions. Experimental partial melt of the Indarch enstatite chondrite at 1,425¿C (29% partial melt). Taylor & Scott 2004
Mercury Crustal Silicates 25 Mn 0.06           wt% Model composition of the silicate portion of Mercury given in wt% and taken from the study by Morgan and Anders 1980. Taylor & Scott 2004 Morgan & Anders 1980
Mercury Crustal Silicates 25 Mn 0           wt% Suggested bulk major element chemical composition in weight percent of the Silicate portion of Mercury. These values are taken according to the Vaporizaiton Model of Fegley and Cameron 1987. Taylor & Scott 2004 Fegley & Cameron 1987
Mercury Crustal Silicates 25 Mn 0.13           wt% Models for bulk chemical composition of Mercury using three surface magma compositions. Calculated 10% partial melt at 10 kbar of the bulk composition given by Krot et al. 2001 using skeletal olivine and cryptocrystalline chondrules in metal-rich chondrites. Taylor & Scott 2004 Krot et al. 2001
Mercury Crustal Silicates 25 Mn 0           wt% Models for the bulk chemical composition in wt% of the silicate portion of Mercury as give by the refractory end member from the study by Goettel 1988. Taylor & Scott 2004 Goettel 1988
Mercury Crustal Silicates 25 Mn 0.05           wt% Model of the bulk chemical composition of the silicate portion of Mercury as given by Goettel 1988 values for the refractory end member and various other studies of the bulk silicate earth to yield FeO of 3 wt% (61% refractory end member, 39% bulk silicate earth). Taylor & Scott 2004 Goettel 1988
Jagoutz et al. 1979
Taylor & McLennan 1985
McDonough & Sun 1995
Mesozoic & Cenozoic Extensions 25 Mn 0.1           wt%ox Rudnick & Fountain 1995
Mesozoic & Cenozoic Extensions 25 Mn 0.1           wt%ox 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 25 Mn 0.1           wt%ox Rudnick & Fountain 1995
Mesozoic & Cenozoic Orogens 25 Mn 0.1           wt%ox 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
META 78008 Urelite 25 Mn 2.94             Trace element compositional data on META 78008 Urelite. Mittlefehldt 2004 Warren & Kallemeyn 1992
Metafelsic Volcanics 25 Mn 0.08         41 wt%ox Average of 38 subsamples and 3 composites. Gao et al. 1998
Metalliferous Clay 25 Mn 2.67         12 wt%ox Average of 12 metalliferous clays between 10-30 m depth using DCP analyses. Plank & Langmuir 1998
Metamorphic Rocks 25 Mn 0.1           wt%ox Metamorphic rock proportions according to fig. 2: 64% Gneisses; 15.4% Mica Schist; 17.8% Amphibolites; 2.6% Marbles. Wedepohl 1995 Poldervaart 1955
Metapelitic Granulitic Xenolites 25 Mn 0.13 0.11       77 wt%ox Median values are used instead of average values in the model calculations to avoid outlyers of small sample populations. Rudnick & Fountain 1995
Mexico Trench 25 Mn 2.33           wt%ox 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 25 Mn 0.1           wt% 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 25 Mn 0.1   0       wt% 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 25 Mn 0.04           wt% 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 25 Mn 0.03           wt% 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 25 Mn 0.1           wt% 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 25 Mn 0.11           wt% 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 25 Mn 0.1           wt%ox Rudnick & Fountain 1995
Miles IIE Iron 25 Mn 1.31             Trace element compositional data on Miles IIE Iron. Mittlefehldt 2004 Ebihara et al. 1997
Miles IIE Iron 25 Mn 2.07             Trace element compositional data on Miles IIE Iron. Mittlefehldt 2004 Ebihara et al. 1997
Mincy Mesosiderite 25 Mn 4.6             Trace element compositional data on Mincy Mesosiderite. Mittlefehldt 2004 Mittlefehldt in press
Simpson & Ahrens 1977
Mishash Formation 25 Mn 17         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 = 0.7 ppm. Altschuller 1980 Mazor 1963
Mississippi River Particulates 25 Mn 1300           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
Monterey Formation 25 Mn 130         5 ppm Dark pelletal shaly phosphorites, associated with radiolaran chert and organic-rich bentonic shales of the Monterey formation Tertiary geosyncline in California, U.S.A., P2O5: 15-20%. Detection Limit = 0.7 ppm. Altschuller 1980
Monzonites 25 Mn 0.1         252 wt%ox Average major oxide concentration values for Monzonite consolidated from 102 references and 252 analyses. Differentiation index equal to 69.58, Crystallization index equal to 19.20. Le Maitre 1976
Moon 25 Mn 0.03           ppm Model major element composition of the Moon as first noted by Ganapathy and Anders 1974. The moon is notably depleted in the alkali elements which could have been an effect of the high temperature of chondrule formation.  Morgan et al. 1978 Ganapathy & Anders 1974
Moore County Eucrite 25 Mn 3.49             Trace element compositional data on Moore County Eucrite. Mittlefehldt 2004 Barrat et al. 2000
McCarthy et al. 1973
MORB Basaltic Glass 25 Mn 0.2           wt% 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 25 Mn 0.2           wt% MORB Glass MELPHNX-2-068-001 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 25 Mn 0.25           wt% MORB Glass MELPHNX-2-GC083 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 25 Mn 0.19           wt% MORB Glass WASRAI2-050-007 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
Mugearites 25 Mn 0.26         55 wt%ox Average major oxide concentration values for Mugearite consolidated from 25 references and 55 analyses. Differentiation index equal to 54.63, Crystallization index equal to 25.83. Le Maitre 1976
N-MORB 25 Mn 0.17           wt% 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 25 Mn 0.16           wt% 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 25 Mn 0.19           wt%ox 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 25 Mn 0.14           wt% Primary N-MORB (Normal Mid-Ocean Ridge Basalt) major element compositions as measured by Presnall & Hoover 1987. All mineral compositions normalized to 100%. Workman & Hart 2005 Presnall & Hoover 1987
N-MORB 25 Mn 0.14           wt% 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 25 Mn 0.18           wt% 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
Nakhla Meteorite 25 Mn 3820   310       ppm Mars elemental abundances as given by Nakhla meteorite (nakhlite) as given in Lodders 1988. McSween, Jr. 2004 Lodders 1998
Nankai Trench 25 Mn 0.59           wt%ox 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 25 Mn 0.11         4 wt%ox 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
Narbada River Particulates 25 Mn 1200           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
Nepheline Leucite Basalts 25 Mn 0.15         70 wt%ox Average major oxide concentration values for Nepheline, Leucite Basalt consolidated from 16 references and 70 analyses. Differentiation index equal to 28.60, Crystallization index equal to 48.50. Le Maitre 1976
Nepheline Syenites 25 Mn 0.15         108 wt%ox Average major oxide concentration values for Nepheline syenite consolidated from 37 references and 108 analyses. Differentiation index equal to 84.20, Crystallization index equal to 7.45. Le Maitre 1976
Nephelinites 25 Mn 0.26         159 wt%ox Average major oxide concentration values for Nephelinite consolidated from 38 references and 159 analyses. Differentiation index equal to 38.07, Crystallization index equal to 37.70. Le Maitre 1976
New Hebrides Islands 25 Mn 0.19         65 wt% Average major and trace element values for New Hebrides Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Niger River Particulates 25 Mn 650           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
Norites 25 Mn 0.14         188 wt%ox Average major oxide concentration values for Norite consolidated from 41 references and 188 analyses. Differentiation index equal to 23.29, Crystallization index equal to 51.19. Le Maitre 1976
North Antilles Trench 25 Mn 0.17           wt%ox 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 25 Mn 0.13           wt%ox Compostional estimate of the North Qinling orogenic belt. Average composition of granulite terrains. Gao et al. 1998
North Qinling Belt in China 25 Mn 0.11           wt%ox Compostional estimate of the North Qinling orogenic belt. Calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
North Qinling Belt in China 25 Mn 0.11           wt%ox Compostional estimate of the North Qinling orogenic belt. Includes sedimentary carbonates. Gao et al. 1998
North Qinling Belt in China 25 Mn 0.1           wt%ox 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 25 Mn 0.11           wt%ox 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
Northern Blake Plateau Phosphorites 25 Mn 0.45         8 wt%ox Composition of Blake plateau phosphorite and comparable deposits. Data was taken from analyses of composites of 8 phosphorites. Total Manganese Manheim et al. 1980
Novo-Urei Ureilite 25 Mn 0.386   0.004       wt%ox Elemental abundances of the Novo-Urei Meteorite which is a urelite achondrite. Abundances were determined by Instrumental Neutron Activation Analysis and also Radiochemical Neutron Activation Analysis in order to attain more precise data for REEs. Boynton et al. 1976
Nuevo Laredo Eucrite 25 Mn 4.5             Trace element compositional data on Nuevo Laredo Eucrites. Mittlefehldt 2004 Warren & Jerde 1987
Ocean Arc Xenoliths 25 Mn 0.14 0.14 0.01     21   Mean and median whole rock composition of Oceanic Arc Xenoliths as based on Major/Minor element compositions and specific elemental ratios. Pearson et al. 2004
Ocean Island Peridotite 25 Mn 0.11           wt% Major element mineral chemical data for a spinel mineral sample in a Hawaiian peridotite xenolith from plagioclase-spinel facies. Pearson et al. 2004 Sen 1988
Ocean Island Peridotite 25 Mn 0.08           wt% Major element mineral chemical data for a orthopyroxene mineral sample in a Hawaiian peridotite xenolith from plagioclase-spinel facies. Pearson et al. 2004 Sen 1988
Ocean Island Peridotite 25 Mn 0.05           wt% Major element mineral chemical data for a clinopyroxene mineral sample in a Hawaiian peridotite xenolith from plagioclase-spinel facies. Pearson et al. 2004 Sen 1988
Ocean Island Peridotite 25 Mn 0.06           wt% Major element mineral chemical data for a spinel mineral sample in a Hawaiian peridotite xenolith from plagioclase-spinel facies. Pearson et al. 2004 Sen 1988
Oceanic Crust 25 Mn 1200           ppm Minor and trace element averages for the Oceanic crust based on Hofmann 1988 and Wedepohl 1999 Wedepohl & Hartmann 1994 Wedepohl 1981
Oceanic Island Xenoliths 25 Mn 0.13 0.12 0.04     16   Mean and median whole rock composition of Ocean Island Xenoliths as based on Major/Minor element compositions and specific elemental ratios. Pearson et al. 2004
Oceans Deep water 25 Mn 38           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. Species = Dissolved Mn. Depth = 985 m. Quinby-Hunt & Turekian 1983 Landing & Bruland 1980
Oceans Surface water 25 Mn 34           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. Species = Dissolved Mn. Depth < 1 m. Quinby-Hunt & Turekian 1983 Landing & Bruland 1980
ODP Site 735 25 Mn 0.157 0.15       22 wt%ox Average of 22 composite strip samples as defined in Table 1. Hart et al. 1999
ODP/DSDP Site 417/418 25 Mn 0.17           wt%ox This analysis represents a super-composite for DSDP Sites 417 and 418 combined. The recipe for this composite can be found in Appendix 1. Staudigel et al. 1996
Orangeite 25 Mn 0.14         114 wt% 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
Ordinary Chondrites   Cr/Mn 1.51   0.08         Element ratios were determined on relatively unaltered chondritic meteorites including L, LL and H. McDonough & Sun 1995
Orgueil Chondrite 25 Mn 2.26             Bulk compositions of Orgueil chondrules as measured by INAA. Grossman et al. 1985
Orgueil Chondrite 25 Mn 1960         12 ppm 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 25 Mn 1980         12 ppm Orgueil meteorite measurements. Anders & Grevesse 1989
Orinoco River Particulates 25 Mn 740           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
Oulad Abdoun Basin 25 Mn 8         4 ppm Clayey pelletal phosphorites, associated with limestones, cherts and clays of Oulad Abdoun Basin carbonate platform of Morocco; composite samples of mining production in four localities, representing 10,000 tons, P2O5: 33%. Detection Limit = 0.7 ppm. Altschuller 1980
Paleozoic Orogens 25 Mn 0.1           wt%ox Rudnick & Fountain 1995
Paleozoic Orogens 25 Mn 0.1           wt%ox 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
Parana River Particulates 25 Mn 270           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
Pelagic Clay 25 Mn 0.59         55 wt%ox 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. Plank & Langmuir 1998
Pelagic Clay 25 Mn 1.7         6 wt%ox Average of 6 analyses weighted by depth interval. Plank & Langmuir 1998
Pelagic Clay 25 Mn 2.13         3 wt%ox Middle 30 m of a total section that is 335 m thick (Site 581) dominated by pelagic clay. Plank & Langmuir 1998
Pelagic Clay 25 Mn 1.7           wt%ox 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
Pelagic Clay 25 Mn 0.41         56 wt%ox 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. Plank & Langmuir 1998
Pelagic Clay 25 Mn 0.41         56 wt%ox 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. Plank & Langmuir 1998
Pelagic Clay 25 Mn 0.77         8 wt%ox 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. Plank & Langmuir 1998
Pelagic Clay 25 Mn 2.1         6 wt%ox Average of 6 analyses weighted by depth interval. Plank & Langmuir 1998
Pelites 25 Mn 0.06         1341 wt%ox Average of 1238 subsamples and 103 composites. Gao et al. 1998
Pelites 25 Mn 0.07         69 wt%ox Average of 60 subsamples and 9 composites. Gao et al. 1998
Pena Blanca Spring Aubrite 25 Mn 1.94             Trace element compositional data on Pe¿a Blanca Spring Aubrite. Mittlefehldt 2004 Wolf et al. 1983
Lodders et al. 1993
Peninsular Range Batholith 25 Mn 0.03           wt% 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
Peridotites 25 Mn 0.41         103 wt%ox Average major oxide concentration values for Peridotite consolidated from 41 references and 103 analyses. Differentiation index equal to 6.17, Crystallization index equal to 69.66. Le Maitre 1976
Periodotite Massifs 25 Mn 0.14           wt% Average Zabargad fertile peridotite model for upper mantle composition given by Bonatti et al. 1986. Walter 2004 Bonatti et al. 1986
Periodotite Section in Ophiolites   Fe/Mn 62   7         McDonough 1991
Periodotite Section in Ophiolites 25 Mn   0.13         wt%ox McDonough 1991
Peru Trench 25 Mn 0.43           wt%ox Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Petersburg Eucrites 25 Mn 4             Trace element compositional data on Petersburg Eucrite. Mittlefehldt 2004 Mason et al. 1979
Buchanan & Reid 1996
Phanerozoic Flood Basalts 25 Mn 0.18         6 wt% 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 25 Mn 0.23         18 wt% 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 25 Mn 0.17         9 wt% 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 25 Mn 0.17         7 wt% 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 25 Mn 0.21         1 wt% 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 25 Mn 0.17         1 wt% 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 25 Mn 0.19         1 wt% Major and trace element compositions as well as selected isotopic composition for Parana Flood Basalts in Urubici (High Ti). Farmer 2004 Peate 1997
Phanerozoic Flood Basalts 25 Mn 0.25         36 wt% 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
Philip Trench 25 Mn 0.93           wt%ox Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Phonolites 25 Mn 0.17         320 wt%ox Average major oxide concentration values for Phonolite consolidated from 59 references and 320 analyses. Differentiation index equal to 82.94, Crystallization index equal to 7.23. Le Maitre 1976
Phosphoria Formation 25 Mn   30         ppm Rare-metal contents with modes above threshold values in phosphorites. Gulbrandsen 1966
Phosphoria Formation 25 Mn 0.003         61 ppm Average phosphorite of Phosphoria formation.  Modal values used for minor elements. Gulbrandsen 1966
Phosphoria Formation 25 Mn 30         60 ppm Dark pelletal shaly phosphorites, average of the Retort (20) and Meade Peak (40) phosphatic shale members of the Phosphoria formation of the North Rocky Mountains, associated with black chert, shale and carbonates of the Permian geosyncline, P2O5 = 23-37%. Detection Limit = 0.7 ppm. Altschuller 1980 Gulbrandsen 1966
Post-Archean Terrrains 25 Mn 0.09           wt%ox Major and minor element composition of the Upper Continental Crust as given by Eade and Fahrig 1971. Shaw et al. 1986 Eade & Fahrig 1971
Precambrian Canadian Shield 25 Mn 0.068           wt%ox Shaw et al. 1986
Precambrian Granulites 25 Mn 0.12         88 wt%ox Shaw et al. 1986
Primitive Mantle   Cr/Mn 2.5             Pyrolite model for the silicate Earth composition based on peridotites, komatiites and basalts.and basalts. McDonough & Sun 1995
Primitive Mantle   Fe/Mn 61             McDonough 1991
Primitive Mantle 25 Mn 0.13           wt%ox Model compositions for Earth's Primitive mantle as based on analysis from Palme and Nickel 1985. McDonough & Frey 1989 Palme & Nickel 1985
Primitive Mantle 25 Mn 0.14           wt%ox Model compositions for Earth's Primitive mantle as based on analysis from McDonough & Sun 1989 (in prep). McDonough & Frey 1989 McDonough & Sun 1989
Primitive Mantle 25 Mn 0.14           wt%ox Estimates of major element oxide composition from the Primitive mantle as given by McDonough & Frey 1989 and Sun 1982. These values show that average Primitive mantle has roughly the same compositional values as Garnet/Spinel peridotites with some exceptions. McDonough 1990 McDonough & Frey 1989
Sun 1982
Primitive Mantle 25 Mn   0.14         wt%ox McDonough 1991 McDonough & Frey 1989
Sun 1982
Primitive Mantle 25 Mn 0.15           wt%ox Model compositions for Earth's Primitive mantle as based on analysis from Ringwood 1979. McDonough & Frey 1989 Ringwood 1979
Primitive Mantle 25 Mn 0.14           wt%ox Model compositions for Earth's Primitive mantle as based on analysis from Sun 1982. McDonough & Frey 1989 Sun 1982
Primitive Mantle 25 Mn 0.13           wt%ox Model compositions for Earth's Primitive mantle as based on analysis from W¿nke et al. 1984. McDonough & Frey 1989 Wanke et al. 1984
Primitive Mantle 25 Mn 0.13           wt%ox Model compositions for Earth's Primitive mantle as based on analysis from Hart and Zindler 1987. McDonough & Frey 1989 Hart & Zindler 1986
Primitive Mantle 25 Mn 0.131           wt%ox Model compositions for Earth's Primitive mantle as based on analysis from Anderson 1983. McDonough & Frey 1989 Anderson 1983
Primitive Mantle 25 Mn 0.13           wt%ox Model compositions for Earth's Primitive mantle as based on analysis from Taylor and McLennan 1985. McDonough & Frey 1989 Taylor & McLennan 1985
Primitive Mantle 25 Mn 0.149           wt%ox Minor oxides of the primitive mantle (in wt.%) that comprise the remnant portions of the Earth's mantle. In this particular study the sum of the minor oxides is taken and normalized to 100% in an effort to obtain the absolute values of each element, which are then used for comparison to prior studies conducted of the Earth's mantle. Allegre et al. 1995
Primitive Mantle 25 Mn 0.13           wt%ox Bulk silicate Earth model based on C1 Carbonaceous Chondrite values of major element oxides as taken from Taylor and McLennan 1985. McDonough & Sun 1995 Taylor & McLennan 1985
Primitive Mantle 25 Mn 0.11           wt%ox Pyrolite model of the silicate Earth based on the MORB-harzburgite model according to Green et al. 1979. Compositions are given in weight percent per silicate oxide. McDonough & Sun 1995 Green et al. 1979
Primitive Mantle 25 Mn 0.13           wt%ox Pyrolite model of the silicate Earth based on the least depleted ultramafic xenolith model according to Jagoutz et al. 1979. Compositions are given in weight percent per silicate oxide. McDonough & Sun 1995 Jagoutz et al. 1979
Primitive Mantle 25 Mn 1013           ppm Minor and trace element concentrations of the Primitive Mantle according to 4 sources (Jagoutz et al. 1979, Hart&Zindler 1986, Morgan 1986, Hofmann 1986) used as balances for calculations. Wedepohl & Hartmann 1994 Jagoutz et al. 1979
Primitive Mantle 25 Mn 1045           ppm The 'Second Approach' to calculate primitive mantle composition (according to Wedepohl & Hartmann 1991) utilizing 97.2% Balmuccia peridotite plus 2.8% bulk crust concentrations of 40 elements. The 2.8% infusing of bulk crust concentrations is due to the 3-6% parital melt loss of MORB-type prior to forming Balmuccia lherzolites. The 3-6% MORB therefore must be replaced in the Balmuccia lherzolite in the form of volatile elements so as to mimic the original concentrations of the primitive mantle. Wedepohl & Hartmann 1994 Wedepohl 1991
Primitive Mantle 25 Mn 0.14           wt% Primitive mantle model of upper mantle composition from Palme and O'Neill Treatise on Geochemistry Chapter 2.01. Walter 2004 Palme & O'Neill 2004
Primitive Mantle 25 Mn 1045   104.5       ppm Pyrolite model for the silicate Earth composition based on peridotites, komatiites and basalts. Error estimate is subjective. McDonough & Sun 1995
Primitive Mantle 25 Mn 0.135           wt%ox Pyrolite model for the silicate Earth composition based on peridotites, komatiites and basalts. McDonough & Sun 1995
Primitive Mantle 25 Mn 1050   105       ppm Elemental composition of the Primitive Mantle of the Earth as given from this study and other various sources. These elemental values are compared to those of CI Chondrites given by Palme & Jones 2004 Treatise of Geochemistry. Comments given by the authors in reference to these values: versus MgO Palme & O'Neill 2004 O'Neill & Palme 1998
Primitive Mantle 25 Mn 0.15           wt% PRIMA (PRImitive MAntle) model of fertile upper mantle composition given by Allegre et al. 1995. Walter 2004 Allegre et al. 1995
Primitive Mantle 25 Mn 0.14           wt% Major and minor element compositional averages in Primitive upper mantle models. Pearson et al. 2004 McDonough & Sun 1995
Primitive Mantle 25 Mn 0.13           wt% Major and minor element compositional averages in Primitive upper mantle models. Pearson et al. 2004 Palme & Nickel 1985
Primitive Mantle 25 Mn 0.13           wt% Primitive Upper Mantle (PUM) major element compositions as measured by McDonough & Sun 1995. All mineral compositions normalized to 100%. Workman & Hart 2005 McDonough & Sun 1995
Primitive Mantle 25 Mn 0.13           wt% Major and minor element compositional averages in Primitive upper mantle models. Pearson et al. 2004 Hart & Zindler 1986
Primitive Mantle 25 Mn 1050           ppm Elemental abundances of the Primitive Mantle of the Earth as given by various sources. This set of values are given as a comparison to those of the Bulk Continental Crust given by Rudnick & Gao of the Treatise on Geochemistry Chapter 3.1. Palme & O'Neill 2004 O'Neill & Palme 1998
Primitive Mantle 25 Mn 0.14           wt% Major and minor element compositional averages in Primitive upper mantle models. Pearson et al. 2004 Jagoutz et al. 1979
Protolith Gabbros at ODP Site 735 25 Mn 0.17         8 wt%ox Average of 8 protolith samples as defined in the footnote of Table 2 and Table 1. Hart et al. 1999
Pungo River Formation 25 Mn 10         2 ppm Pelletal phosphorites, quartzose and clayey, associated with limestones, sands, and silts of estuarine and near shore coastal plain platform (Pungo River formation, North Carolina, U.S.A.): average of two composites: concentrates from prospecting composites of entire mined zone in two areas; P2O5: 30-33%. Detection Limit = 0.7 ppm. Altschuller 1980
Pyrolites 25 Mn 0.15           wt% Pyrolite model of fertile upper mantle composition give by Ringwood 1979. Walter 2004 Ringwood 1979
Pyrolites 25 Mn 0.14           wt% Pyrolite model of McDonough & Sun 1995 for modeling fertile upper mantle compositions. Walter 2004 McDougall & Sun 1995
Pyroxenites 25 Mn 0.16         106 wt%ox Average major oxide concentration values for Pyroxenite consolidated from 42 references and 106 analyses. Differentiation index equal to 11.51, Crystallization index equal to 66.29. Le Maitre 1976
Qingzhen Enstatite Chondrite 25 Mn 2.05             Bulk elemental compositions of Quingzhen whole rock as measured by Instrumental Neutron Activation Analysis. Grossman et al. 1985
QUE 94201 Meteorite 25 Mn 3480   150       ppm Mars elemental abundances as given by QUE94201 meteorite, which is a basalitc shergottite, as given in Lodders 1988. McSween, Jr. 2004 Lodders 1998
Radiolarian Clay 25 Mn 0.33         8 wt%ox The bulk composition of the radiolarian clay was calculated by first estimating the composition of the average clay in the region and then diluting it by 15% biogenic SiO2. Plank & Langmuir 1998
Radiolarian Clay 25 Mn 0.33         8 wt%ox The bulk composition of the radiolarian clay was calculated by first estimating the composition of the average clay in the region and then diluting it by 15% biogenic SiO2. Plank & Langmuir 1998
Radiolarian Clay 25 Mn 0.17         11 wt%ox This section contains 17% biogenic opal but the analyses were not diluted based on there SiO2 content. Since the average Rb concentratio is equal to the simple average in 11 analyses, simple averaging is applied here. Plank & Langmuir 1998
Radiolarian Clay 25 Mn 0.48         2 wt%ox The bulk composition of the radiolarian clay was calculated by first estimating the composition of the average clay in the region and then diluting it by 30% biogenic SiO2. Plank & Langmuir 1998
Radiolarites 25 Mn 0.38         17 wt%ox Average of 17 combined analyses weighted by interval height. Plank & Langmuir 1998
Radiolarites 25 Mn 0.04         4 wt%ox Average of 4 radiolarite analyses that have been corrected using dilution factors based on the down-core logging for SiO2 contents. Plank & Langmuir 1998
Radiolarites 25 Mn 0.02           wt%ox Estimates of the composition of the Radiolarite section of the sediment column from DSDP Hole 801. This section comprises the final layer of the column and all element values were estimated according to methods of Plank and Ludden 1992. Elliot et al. 1997
Retort Phosphatic Shale Member 25 Mn 0.003         20 ppm Average phosphorite of Retort Phosphatic Shale Member of Phosphoria formation.  Modal values used for minor elements. Gulbrandsen 1966
Rhyodacites 25 Mn 0.09         63 wt%ox Average major oxide concentration values for Rhyodacite consolidated from 40 references and 63 analyses. Differentiation index equal to 71.44, Crystallization index equal to 18.67. Le Maitre 1976
Rifted Continental Margins 25 Mn 0.1           wt%ox 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
Rifted Continental Margins 25 Mn 0.1           wt%ox Rudnick & Fountain 1995
River Particulates 25 Mn 1050           µg/g World averages for suspended matter in major world rivers. This particular array of rivers can lead to slightly biased results for certain trace elements since those elements are usually measured in temperate and/or arctic rivers. All averages for major elements are weighted according to the suspended load prior to the construction of dams, as for trace elements the average contents are mean values. Martin & Meybeck 1979
Rivers 25 Mn 7           ppb Average concentration of elements in filtered river water.  These values are used in conjuction with concentrations taken from the same elements in unfiltered sea water and then used in equations given in Li 1982 to determine mean oceanic residence time of particular elements.  Problems arise however with the relative pollution found in average river waters, and a lack of adequate data for filtered seawater to make a better comparison to filtered river water (which in this instance is found to be the most ideal comparison, yet the most difficult to perform). Li 1982
Ryuku Trench 25 Mn 2.06           wt%ox Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 4 or low. Plank & Langmuir 1998
Scotia Island Basalt 25 Mn 0.15         41 wt% Average major and trace element values for Scotian Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Seawater 25 Mn 10           ng/kg This mean ocean concentratio has been calculated based on the correlation expressions in Table 1, assuming a salinity of 35¿, a nitrate concentratio of 30 ¿mol/kg, a phosphate concentratio of 2 ¿mol/kg and a silicate concentratio of 110 ¿mol/kg. Species = Dissolved Mn. Where possible data is from the Pacific ocean that shows the greates variations; otherwhise data is from the Atlantic ocean. Quinby-Hunt & Turekian 1983 Landing & Bruland 1980
Seawater 25 Mn 0.5     0.2 3     Depletion at depth. Mn[2+] and MnCl[1+] are the probable main species in oxygenated seawater. Range and average concentrations normalized to 35¿ salinity. Bruland 1983
Seawater 25 Mn 72             Elemental average concentrations of the deep Atlantic and deep Pacific waters summarized by Whitfield & Turner 1987.  Li 1991 Whitfield & Turner 1987
Seawater 25 Mn 0.005             Broeker & Peng 1982
Seawater 25 Mn 0.04           ppb Average concentration of elements in unfiltered seawater.  These values are used in conjuction with concentrations taken from the same elements in filtered river water and then used in equations (given in Li 1982) to determine mean oceanic residence time of particular elements.  Problems arise however with the relative pollution found in average river waters, and a lack of adequate data for filtered seawater to make a better comparison to filtered river water (which in this instance is found to be the most ideal comparison, yet the most difficult to perform). Li 1982 Klinkhammer & Bender 1980
Martin & Knauer 1980
Sediments 25 Mn 0.12           wt%ox Sedimentary Rock proportions according to fig. 2: 44.0% Shales, Siltstones; 20.9% Sandstones, Greywackes; 20.3% Mafic etc. Volcanics; 14.6% Carbonates (0.8% Evaporites). Wedepohl 1995 Ronov & Yaroshevskiy 1969
Serra De Mage Eucrite 25 Mn 4.88             Trace element compositional data on Serra de Mage Eucrite. Mittlefehldt 2004 Barrat et al. 2000
McCarthy et al. 1973
Shalka Diogenite 25 Mn 4.28             Trace element compositional data on Shanlka Diogenite. Mittlefehldt 2004 McCarthy et al. 1972
Mittlefehldt 1994
Shallowater Aubrite 25 Mn 0.68             Trace element compositional data on Shallowater Aubrite. Mittlefehldt 2004 Easton 1985
Keil et al. 1989
Shergotty Meteorite 25 Mn 4110   130       ppm Mars elemental abundances as given by Shergotty meteorite (basalitc shergottite) as given in Lodders 1988. Mars elemental abundances as given by Shergotty meteorite, which is a basalitc shergottite, as given in Lodders 1988. McSween, Jr. 2004 Lodders 1998
Silicate Earth   Cr/Mn 2.5             Pyrolite model for the silicate Earth composition based on peridotites, komatiites and basalts.and basalts. McDonough & Sun 1995
Silicate Earth 25 Mn 0.135           wt%ox Pyrolite model for the silicate Earth composition based on peridotites, komatiites and basalts. McDonough & Sun 1995
Silicate Earth 25 Mn 1045   104.5       ppm Pyrolite model for the silicate Earth composition based on peridotites, komatiites and basalts. Error estimate is subjective. McDonough & Sun 1995
Silicate Earth 25 Mn 1045           ppm Composition of the Silicate Earth as given by elemental abundances in ppm (and wt%). McDonough 2004
Silicate Earth 25 Mn 0.13           wt%ox Bulk silicate Earth model based on C1 Carbonaceous Chondrite values of major element oxides as taken from Taylor and McLennan 1985. McDonough & Sun 1995 Taylor & McLennan 1985
Silicate Earth 25 Mn 0.11           wt%ox Pyrolite model of the silicate Earth based on the MORB-harzburgite model according to Green et al. 1979. Compositions are given in weight percent per silicate oxide. McDonough & Sun 1995 Green et al. 1979
Silicate Earth 25 Mn 0.13           wt%ox Pyrolite model of the silicate Earth based on the least depleted ultramafic xenolith model according to Jagoutz et al. 1979. Compositions are given in weight percent per silicate oxide. McDonough & Sun 1995 Jagoutz et al. 1979
Silicate Earth 25 Mn 1045           µg/g Compostioinal models for the bulk Earth, core and silicate Earth are modified after McDonough & Sun (1995). McDonough 1998
Silicic Precambrian Granulites 25 Mn 0.06         23 wt%ox Shaw et al. 1986
Silicified Limestone 25 Mn 0.17           wt%ox Mixed siliceous and carbonate lithologies including nannofossil and radiolarian oozes, chalk and chert. The average of the Hein et al. (1983) partly silicified chalk has been used after dilution with 50% total CaCO3. Plank & Langmuir 1998
Silty Mud 25 Mn 0.59         16 wt%ox The hemi-pelagic clay analyses where averaged over 10 m intervals and then averaged down-unit. Plank & Langmuir 1998
Sioux County Eucrite 25 Mn 4.34             Trace element compositional data on Sioux County Eucrites. Mittlefehldt 2004 Barrat et al. 2000
McCarthy et al. 1973
Slope Lisbourne Group 25 Mn 30         4 ppm Dark pelletal phosphorites, muddy and calcareous, associated with black chert, shale and limestone of the Slope Lisbourne group geosyncline, Alaska. P2O5 greater than 10%. Detection Limit = 0.7 ppm. Altschuller 1980 Patton & Matzko 1959
Solar Corona 25 Mn 5.38   0.18         Based on the measurement of solar energetic particles. Adopted solar corona values corrected for residual charge/mass fractionation. Normalized to Log A(Si) = 7.55 based on the photospheric scale. Anders & Grevesse 1989
Solar Corona 25 Mn 5.38   0.17         SEP values corrected for the Q/M-depenent fractionation which depend on the assumed Fe/Si ratio. For the most part these values are quite accurate they generally agree with Solar Wind values and lie within the errors of the specroscopic data. Anders & Grevesse 1989 Breneman & Stone 1985
Solar Photosphere 25 Mn 5.39   0.03         Abundances in Solar Photosphere; in original table: log N(H) = 12.00 Anders & Grevesse 1989
Solar Photosphere 25 Mn 5.39   0.03         Elemental solar photospheric abundances as given by various references. Palme & Jones 2004 Grevesse & Sauval 1998
Solar System 25 Mn 9550   916.8     20   Solar atomic abundances based on an average of C1 chondrites. Values are not normalised to 100% but they are relative to 10E6 Silica atoms. Anders & Grevesse 1989
Solar System 25 Mn 9300             Anders & Ebihara 1982 Cameron 1982
Solar System 25 Mn 9510   922.47     16   Anders & Ebihara 1982
Solar System 25 Mn 0.12           wt%ox Wedepohl 1995 Le Maitre 1976
Solar System 25 Mn 5.51   0.2755         Solar system abundance of volatile and refractory elements based on calculations from Palme & Jones 2004 on Moderately volatile elements. Palme & Jones 2004
Solid Earth   Cr/Mn       2 2     Limits on the composition of the core assuming that between 5% and 15% of the light elements reside in the Earth's core. Model based on the silicate Earth estimates from Table 5. McDonough & Sun 1995
Solid Earth 25 Mn       0.22 0.24   wt% Limits on the composition of the core assuming that between 5% and 15% of the light elements reside in the Earth's core. Model based on the silicate Earth estimates from Table 5. McDonough & Sun 1995
Solid Earth 25 Mn 2600           ppm Renormalized elemental compositions of the Earth's Core given in ppm. These compositions were obtained by using elemental ratio diagrams to extract values for each particular element then using those values in a series of equations derived by the authors. Allegre et al. 1995
Solid Earth 25 Mn 0.08           wt% Major element composition of the Bulk Earth. McDonough 2004
Solid Earth 25 Mn 800           ppm Bulk elemental composition of the Solid Earth with concentrations given in ppm (and wt% where noted). McDonough 2004
Solid Earth 25 Mn 720           µg/g Compostioinal models for the bulk Earth, core and silicate Earth are modified after McDonough & Sun (1995). McDonough 1998
Solid Mars 25 Mn 0.1           wt% Mars surface chemistry as given from MGS thermal emission spectra on Surface type-2 for major element oxides and calculated by Hamilton et al. 2001 using the method of Wyatt et al. 2001. McSween, Jr. 2004 Hamilton et al. 2001
Wyatt et al. 2001
Solid Mars 25 Mn 0.1           wt% Mars surface chemistry as given from MGS thermal emission spectra on Surface type-1 for major element oxides and calculated by Hamilton et al. 2001 using the method of Wyatt et al. 2001. McSween, Jr. 2004 Hamilton et al. 2001
Wyatt et al. 2001
South African Garnet Peridotites 25 Mn 0.13           wt%ox Average major oxide composition of 24 African Garnet Peridotite xenoliths from Boyd and Mertzman 1987. Values mainly used for comparison to compsitions gathered by McDonough in his study to show no significant differences between prior and current averages. McDonough 1990 Boyd & Mertzman 1987
South Antilles Trench 25 Mn 0.07           wt%ox Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 3 or low. Plank & Langmuir 1998
South Margin of North China Craton 25 Mn 0.09           wt%ox Compostional estimate of the south margin of the North China craton. Calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
South Margin of North China Craton 25 Mn 0.1           wt%ox Compostional estimate of the south margin of the North China craton. Average composition of granulite terrains. Gao et al. 1998
South Margin of North China Craton 25 Mn 0.09           wt%ox Compostional estimate of the south margin of the North China craton. Average compostion of granulite terrains and calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
South Margin of North China Craton 25 Mn 0.09           wt%ox Compostional estimate of the south margin of the North China craton. Gao et al. 1998
South Margin of North China Craton 25 Mn 0.09           wt%ox Compostional estimate of the south margin of the North China craton. Includes sedimentary carbonates. Gao et al. 1998
South Qinling Belt in China 25 Mn 0.1           wt%ox Compostional estimate of the Southern Qinling orogenic belt. Average compostion of granulite terrains and calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
South Qinling Belt in China 25 Mn 0.1           wt%ox Compostional estimate of the South Qinling orogenic belt. Gao et al. 1998
South Qinling Belt in China 25 Mn 0.09           wt%ox Compostional estimate of the South Qinling orogenic belt. Calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
South Qinling Belt in China 25 Mn 0.08           wt%ox Compostional estimate of the South Qinling orogenic belt. Includes sedimentary carbonates. Gao et al. 1998
South Sandwich Trench 25 Mn 0.06           wt%ox Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Spinel Peridotites   Fe/Mn 60 59 10     366   McDonough 1990
Spinel Peridotites   Fe/Mn 60   10         McDonough 1991
Spinel Peridotites 25 Mn 0.14 0.14 0.03     366 wt%ox McDonough 1990
Spinel Peridotites 25 Mn   0.14         wt%ox McDonough 1991 Maaloe & Aoki 1975
Jordan 1979
Boyd 1989
McDonough 1990
Spinel Peridotites 25 Mn 0.12           wt%ox Average major oxide composition of Spinel Peridotites from Maaloe and Aoki 1975. Values mainly used for comparison to compsition values gathered by McDonough in his study to show no significant differences between prior and current averages. McDonough 1990 Maaloe & Aoki 1975
St. Lawrence River Particulates 25 Mn 700           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
Stannern Eucrite 25 Mn 4             Trace element compositional data on Stannern Eucrite. Mittlefehldt 2004 Barrat et al. 2000
McCarthy et al. 1973
Stony Meteorites 25 Mn 400             Typical activity of selected cosmogenic radionuclides in stony meteorites in the metal phase. Herzog 2004
Subducted Sediment 25 Mn 0.32   0.13       wt%ox Global subducting sediment (GLOSS) composition estimate based on DSDP and ODP drill cores for 70% of the worldwide trenches. The average is calculated as a mass-flux-weighted global mean taking into account convergence rates, trench lengths and sediment columns. Includes sediment columns from seafloor that is not currently subducting. Plank & Langmuir 1998
Sumatra Trench 25 Mn 0.12           wt%ox Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 3 or moderate. Plank & Langmuir 1998
Syenites 25 Mn 0.13         436 wt%ox Average major oxide concentration values for Syenite consolidated from 102 references and 436 analyses. Differentiation index equal to 74.46, Crystallization index equal to 13.04. Le Maitre 1976
Talkeetna Arc Plutonic Rocks 25 Mn 0.19   0.014     6 wt% Geochemical data from the Talkeetna Arc Section of the Lower Crust. These particular values are representative of garnet granulites from the Tonsina section. All values for major element oxides are given in wt.% and for trace elements in ppm. Trace elements were gathered via XRF and ICP-MS analysis. Kelemen et al. 2004
Talkeetna Arc Plutonic Rocks 25 Mn 0.18   0.001     95 wt% Geochemical data from the Talkeetna Arc Section of the Lower Crust. These particular values are representative of gabbronorites from the Talkeetna section. All values for major element oxides are given in wt.% and for trace elements in ppm. Trace elements were gathered via XRF and ICP-MS analysis. Kelemen et al. 2004
Talkeetna Arc Plutonic Rocks 25 Mn 0.19   0.001     114 wt% Geochemical data from the Talkeetna Arc Section of the Lower Crust. These particular values are representative of Lavas, tuffs and volcaniclastic samples from the Talkeetna section. All values for major element oxides are given in wt.% and for trace elements in ppm. Trace elements were gathered via XRF and ICP-MS analysis. Kelemen et al. 2004
Talkeetna Arc Plutonic Rocks 25 Mn 0.11   0.003     28 wt% Geochemical data from the Talkeetna Arc Section of the Lower Crust. These particular values are representative of Intermediate to felsic plutons from the Talkeetna section. All values for major element oxides are given in wt.% and for trace elements in ppm. Trace elements were gathered via XRF and ICP-MS analysis. Kelemen et al. 2004
Talkeetna Arc Plutonic Rocks 25 Mn 0.21   0.005     7 wt% Geochemical data from the Talkeetna Arc Section of the Lower Crust. These particular values are representative of garnet diorites and tonalites from the Klanelneechina section. All values for major element oxides are given in wt.% and for trace elements in ppm. Trace elements were gathered via XRF and ICP-MS analysis. Kelemen et al. 2004
Talkeetna Arc Plutonic Rocks 25 Mn 0.17   0.002     17 wt% Geochemical data from the Talkeetna Arc Section of the Lower Crust. These particular values are representative of pyroxenites from the Tonsina section. All values for major element oxides are given in wt.% and for trace elements in ppm. Trace elements were gathered via XRF and ICP-MS analysis. Kelemen et al. 2004
Tamalyk Krasnoyarsk 25 Mn 100         38 ppm Siliceous and clayey phosphorites from the Altai-Sayan geosyncline Tamalyk Krasnoyarsk, Siberia. Detection Limit = 0.7 ppm. Altschuller 1980 Chaikina & Nikolskaya 1970
Tephrites 25 Mn 0.15         84 wt%ox Average major oxide concentration values for Tephrite consolidated from 23 references and 84 analyses. Differentiation index equal to 47.52, Crystallization index equal to 35.77. Le Maitre 1976
Tholeiites 25 Mn 0.18         190 wt%ox Average major oxide concentration values for Tholeiite consolidated from 31 references and 190 analyses. Differentiation index equal to 24.97, Crystallization index equal to 49.33. Le Maitre 1976
Tinguaites 25 Mn 0.22         83 wt%ox Average major oxide concentration values for Tinguaite consolidated from 24 references and 83 analyses. Differentiation index equal to 79.89, Crystallization index equal to 5.79. Le Maitre 1976
Tonalites 25 Mn 0.08         83 wt%ox Average major oxide concentration values for Tonalite consolidated from 32 references and 83 analyses. Differentiation index equal to 59.53, Crystallization index equal to 29.19. Le Maitre 1976
Tonalites 25 Mn 0.1           wt%ox Total average of group averages from USA, Canada, Sri Lanka, Greenland, Finland, UK and Portugal, with equal statistical weight. Wedepohl 1995 Wedepohl 1991
Arth et al. 1978
Ermanovics et al. 1979
Tarney et al. 1979
Schermerhorn 1987
Paradis et al. 1988
Pohl & Emmermann 1991
Tepper et al. 1993
Tonalites 25 Mn 0.09           wt%ox Total average of group averages from USA, Canada, Sri Lanka, Greenland, Finland, UK and Portugal using an equal statistical weight. Wedepohl 1995
Tonalites-Trondhjemites-Granodiorites 25 Mn 0.06         553 wt%ox Average of 502 subsamples and 51 composites. Gao et al. 1998
Tonalites-Trondhjemites-Granodiorites 25 Mn 0.07         641 wt%ox Average of 596 subsamples and 45 composites. Gao et al. 1998
Tonalites-Trondhjemites-Granodiorites 25 Mn 0.05         355 wt% Analysis of Archean Tonalite-Trondhjemite-Granodiorite (TTG) 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 Martin 1995
Tonga Trench 25 Mn 2.21           wt%ox Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Tongan Basalts 25 Mn 0.17         70 wt% Average major and trace element values for Tongan Arc Basalts given in weight percent and parts per million respectively. Kelemen et al. 2004
Trachyandesites 25 Mn 0.16         223 wt%ox Average major oxide concentration values for Trachyandesite consolidated from 51 references and 223 analyses. Differentiation index equal to 63.59, Crystallization index equal to 23.31. Le Maitre 1976
Trachybasalts 25 Mn 0.16         155 wt%ox Average major oxide concentration values for Trachybasalt consolidated from 48 references and 155 analyses. Differentiation index equal to 46.69, Crystallization index equal to 35.39. Le Maitre 1976
Trachytes 25 Mn 0.15         483 wt%ox Average major oxide concentration values for Trachyte consolidated from 100 references and 483 analyses. Differentiation index equal to 80.67, Crystallization index equal to 9.80. Le Maitre 1976
Turbidites 25 Mn 0.11         4 wt%ox Similar lithologies as for Site 183 but with a greater thickness of the turbidites. Combined 300 m of Site 183 sediments with 480 m of turbidites in Site 178 and two shallow piston cores. Plank & Langmuir 1998
Turbidites 25 Mn 0.08         4 wt%ox Average of 4 Quaternary turbidites from the Ganges cone after McLennan et al. (1990) assuming that equal proportions of fine (clay-silt) and coarse (silt-sand) units. Plank & Langmuir 1998
Ultrabasic Precambrian Granulites 25 Mn 0.14         14 wt%ox Shaw et al. 1986
Upper Continental Crust 25 Mn 0.12           wt% Major element composition of the Upper Continental Crust as given in wt.% from either surface exposures or glacial clays. These values were first given by Clarke & Washington 1924. Rudnick & Gao 2004 Clarke & Washington 1924
Upper Continental Crust 25 Mn 0.08           wt%ox Standard profile (in percentages of Major Rock Species) of the continental crust as shown in abundances according to Figure 2 of Wedepohl 1991. Wedepohl 1995
Upper Continental Crust 25 Mn 527           ppm UCC = Shaw et al. (1967;1976). Wedepohl 1995
Upper Continental Crust 25 Mn 600           ppm Taylor & McLennan 1995
Upper Continental Crust 25 Mn 0.17           wt%ox Average composition of the Upper Crust as derived from composites taken from ODP sites 417/418. Values are taken from varying sources on the same composites in order to compare and contrast with 735B gabbroic composition which should closeley resemble each other. Hart et al. 1999 Staudigel et al. 1995
Smith et al. 1995
Hart & Staudigel 1989
Staudigel et al. 1989
Upper Continental Crust 25 Mn 0.08           wt%ox Upper crust composition based on Taylor and McLennan 1981. Weaver & Tarney 1984 Taylor & McLennan 1981
Upper Continental Crust 25 Mn 0.1           wt% Major and minor element composition of the Upper Crust of the Earth with selected trace element ratios as given by Rudnick and Gao 2004. Kemp & Hawkesworth 2004 Rudnick & Gao 2004
Upper Continental Crust 25 Mn 0.08           wt% Major element composition of the Upper Continental Crust as given in wt.% from either surface exposures or glacial clays. These values were first given by Fahrig and Eade 1968. Rudnick & Gao 2004 Fahrig & Eade 1968
Upper Continental Crust 25 Mn 0.1           wt% Major element composition of the Upper Continental Crust as given in wt.% from either surface exposures or glacial clays. These values were first given by Ronov and Yaroshevskiy 1976. Rudnick & Gao 2004 Ronov & Yaroshevskiy 1976
Upper Continental Crust 25 Mn 0.12           wt% Major element composition of the Upper Continental Crust as given in wt.% from either surface exposures or glacial clays. These values were first given by Goldschmidt 1933. Rudnick & Gao 2004 Goldschmidt 1933
Upper Continental Crust 25 Mn 0.07           wt% Major element composition of the Upper Continental Crust as given in wt.% from either surface exposures or glacial clays. These values were first given by Shaw et al. 1967. Rudnick & Gao 2004 Shaw et al. 1967
Upper Continental Crust 25 Mn 0.1           wt% Major element composition of the Upper Continental Crust as given in wt.% from either surface exposures or glacial clays. These values were first given by Gao et al. 1998a. Rudnick & Gao 2004 Gao et al. 1998
Upper Continental Crust 25 Mn 0           wt% Major element composition of the Upper Continental Crust as given in wt.% from either surface exposures or glacial clays. These values were first given by Borodin 1998. Rudnick & Gao 2004 Borodin 1998
Upper Continental Crust 25 Mn 0.07           wt% Major element composition of the Upper Continental Crust as given in wt.% using derivative compositions of data from Taylor and McLennan 1985.Major element composition of the Upper Continental Crust as given in wt.% from derivative compositions of Taylor and McLennan 1985. Rudnick & Gao 2004 Taylor & McLennan 1985
Upper Continental Crust 25 Mn 0.1   0.01       wt% Recommended composition of the Upper Continental Crust as given by various sources which are listed in Table 1 and 2 of Rudnick and Gao 2004 as well as in the text. Rudnick & Gao 2004 see text









Upper Continental Crust 25 Mn 0.07           wt% Major element composition of the Upper Continental Crust as given in wt.% using derivative compositions of data from Wedepohl 1995. Rudnick & Gao 2004 Wedepohl 1995
Upper Continental Crust 25 Mn 0.1           wt% Reccomended values for major element composition of the Upper Continental Crust as given in wt.% from Rudnick and Gao 2004. Rudnick & Gao 2004
Upper Continental Crust 25 Mn 0.1           wt% Major element composition of the Upper Continental Crust as given in wt.% from either surface exposures or glacial clays. These values were first given by Clarke 1889. Rudnick & Gao 2004 Clarke 1889
Ureilite Primitive Achondrites 25 Mn       0.361 0.384   wt%ox Elemental abundance range of urelites as taken from all achondritic meteorites as found in Mason 1971. Abundances were obtained by INAA (Instrumental Neutron Activation Analysis). Boynton et al. 1976 Mason 1971
Vanuatu Trench 25 Mn 0.21           wt%ox Bulk composition estimate of sediments approaching the trench based on DSDP and ODP drill sites. Confidence level = 1 or highest. Plank & Langmuir 1998
Vega 2 25 Mn 0.14   0.12       wt% XRF elemental analysis of Venus' surface  given in mass percent as calculated from Vega 2 samples. Fegley, Jr. 2004 Surkov et al. 1986
Venera 13 Rocks 25 Mn 0.2   0.1       wt% XRF elemental analysis of Venus' surface  given in mass percent as calculated from Venera 13 samples. Fegley, Jr. 2004 Surkov et al. 1984
Venera 14 Rocks 25 Mn 0.16   0.08       wt% XRF elemental analysis of Venus' surface  given in mass percent as calculated from Venera 14 samples. Fegley, Jr. 2004 Surkov et al. 1984
Venus Mantle 25 Mn 0.2           wt% Bulk mantle/crust composition model for Venus as studied from Pyrolites in the Basaltic Volcanism Study Project version 4, given in major element oxide values. Fegley, Jr. 2004 Lodders & Fegley 1998
Venus Mantle 25 Mn 0.09           wt% Bulk mantle/crust composition model for Venus as studied from Condritic Meteorites in Morgan & Anders 1980, given in major element oxide values. Fegley, Jr. 2004 Morgan & Anders 1980
Lodders & Fegley 1998
Venus N-MORB 25 Mn 0.17           wt% XRF elemental analysis of Venus' surface  given in mass percent as calculated from N-MORB (samples that very closely resemble those of N-MORB) samples. Fegley, Jr. 2004 Wilson 1989
Veramin Mesosiderite 25 Mn 3.7             Trace element compositional data on Veramin Mesosiderite. Mittlefehldt 2004 Mittlefehldt in press
Powell 1971
Volcanoclastic Sediment 25 Mn 0.19         15 wt%ox Average of 15 volcaniclastic sediments using DCP analyses as weighted by the height of each drilled interval. Plank & Langmuir 1998
Volcanoclastic Turbidites 25 Mn 0.13         13 wt%ox Average of 13 volcaniclastic turbidites corrected for pure silica using down-core logging for SiO2 contents, in a similar fashion as for the chert sections. Plank & Langmuir 1998
Volcanoclastic Turbidites 25 Mn 0.11           wt%ox Estimates of the composition of the Volcaniclastic Turbidite section of the sediment column from DSDP Hole 801. Elliot et al. 1997
Volcanoclastic Turbidites 25 Mn 0.15         43 wt%ox Average of 43 combined analyses weighted by interval height. Plank & Langmuir 1998
Watson IIE Iron 25 Mn 2.9             Trace element compositional data on Watson IIE Iron. Mittlefehldt 2004 Olsen et al. 1994
Websterites 25 Mn 0.09         199 wt%ox Average major oxide concentration values for Websterite consolidated from 10 references and 199 analyses. Differentiation index equal to 9.51, Crystallization index equal to 60.27. Le Maitre 1976
Winonaite Pontlyfni 25 Mn 2.02             Trace element compositional data on the Pontlyfni Winonaite. Mittlefehldt 2004 Graham et al. 1977
Davis et al. 1977
Winonaite Tierra Blanca 25 Mn 2.04             Trace element compositional data on Tierra Blanca Winonaite. Mittlefehldt 2004 Kallemeyn & Wasson 1985
Jarosweich 1990
Xenolites 25 Mn 0.13           wt% Least depleted ultramafic xenolith model of fertile upper mantle compositions as given by Jagoutz et al. 1979. Walter 2004 Jagoutz et al. 1979
Y-74450 Eucrites 25 Mn 4.11             Trace element compositional data on Y-74450 eucrite. Mittlefehldt 2004 Wanke et al. 1977
Y-791491 Lodranite 25 Mn 2.2             Trace element compositional data on Lodranite Y-791491. Mittlefehldt 2004 Weigel et al. 1999
Yangtze Craton 25 Mn 0.11           wt%ox Compostional estimate of the Yangtze craton. Average composition of granulite terrains. Gao et al. 1998
Yangtze Craton 25 Mn 0.11           wt%ox Compostional estimate of the Yangtze craton. Gao et al. 1998
Yangtze Craton 25 Mn 0.1           wt%ox Compostional estimate of the Yangtze craton. Calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
Yangtze Craton 25 Mn 0.09           wt%ox Compostional estimate of the Yangtze craton. Includes sedimentary carbonates. Gao et al. 1998
Yangtze Craton 25 Mn 0.1           wt%ox Compostional estimate of the Yangtze craton. Average compostion of granulite terrains and calculated on a sedimentary carbonate rock-free basis. Gao et al. 1998
Yukon River Particulates 25 Mn 1270           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
Zeolite Clay 25 Mn 0.17         3 wt%ox This unit contains a mixture of 50% zeolite clay, 20% Mn-bearing clay and 30% normal clay based on barrel sheet descriptions. The three analyses are weighted accordingly. Plank & Langmuir 1998
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