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

GERM Database Search Results        
Reservoir Z Element Value Median SD Low High N Unit Info Reference Source(s)
Active Continental Rifts 73 Ta 0.7           ppm Rudnick & Fountain 1995
Active Continental Rifts 73 Ta 1.3           ppm Rudnick & Fountain 1995
Alaska Trench 73 Ta 0.522           ppm Plank & Langmuir 1998
Aleutian Basalts 73 Ta 0.25         12 ppm Kelemen et al. 2004
Aleutian Trench 73 Ta 0.545           ppm Plank & Langmuir 1998
ALH 77005 Meteorite 73 Ta 33   7       ppb McSween, Jr. 2004 Lodders 1998
ALH 84001 Meteorite 73 Ta 32           ppb McSween, Jr. 2004 Lodders 1998
ALHA77081 Acapulcoite 73 Ta 50           ng/g Mittlefehldt 2004 Schultz et al. 1982
Amazon River Particulates 73 Ta 2           µg/g Martin & Meybeck 1979
Amphibolites 73 Ta 0.41         189 ppm Gao et al. 1998
Andaman Trench 73 Ta 0.714           ppm Plank & Langmuir 1998
Andes Basalt 73 Ta 0.99         20 ppm Kelemen et al. 2004
Andesites 73 Ta 0.53           ppm Condie 1993
Andesites 73 Ta 0.5           ppm Condie 1993
Andesites 73 Ta 0.5           ppm Condie 1993
Andesites 73 Ta 0.4           ppm Condie 1993
Andesites 73 Ta 0.5           ppm Condie 1993
Andesites 73 Ta 0.35           ppm Condie 1993
Andesites 73 Ta 0.292         50 ppm Plank & Langmuir 1998 Plank & Langmuir 1988
Andesites 73 Ta 0.5           ppm Condie 1993
Andesites 73 Ta 0.25         20 ppm Kelemen et al. 2004
Angrite Angra Dos Reis 73 Ta 350           ng/g Mittlefehldt 2004 Mittlefehldt & Lindstrom 1990
Angrite LEW 87051 73 Ta 110           ng/g Mittlefehldt 2004 Mittlefehldt & Lindstrom 1990
Antilles Trench   Nb/Ta 16.4         3   Plank & Langmuir 1998 Stolz et al. 1996
Archean Terrains 73 Ta 0.6           ppm Rudnick & Fountain 1995
Arenaceous Rocks 73 Ta 0.81         121 ppm Gao et al. 1998
Arenaceous Rocks 73 Ta 0.88         2754 ppm Gao et al. 1998
Ashy Clay 73 Ta 0.299         4 ppm Plank & Langmuir 1998
Australian Granite 73 Ta 0.88         8 ppm Kemp & Hawkesworth 2004 Whalen 1985
Australian Granite 73 Ta 2.9           ppm Kemp & Hawkesworth 2004 Collins et al. 1982
Barea Mesosiderite 73 Ta 54           ng/g Mittlefehldt 2004 Mason & Jarosewich 1973
Mittlefehldt in press
Basalts 73 Ta 0.24           ppm Condie 1993
Basalts 73 Ta 2.48         6 ppm Farmer 2004 Turner et al. 1996a
Basalts 73 Ta 7.36         16 ppm Farmer 2004 Rogers et al. 1998
Basalts 73 Ta 0.45         12 ppm Farmer 2004 Dungan et al. 1986
Basalts 73 Ta 3.77         8 ppm Farmer 2004 Zhang & O'Reilly 1997
Basalts 73 Ta 0.3           ppm Condie 1993
Basalts 73 Ta 0.27           ppm Condie 1993
Basalts 73 Ta 0.23           ppm Condie 1993
Basalts 73 Ta 0.25           ppm Condie 1993
Basalts 73 Ta 0.25           ppm Condie 1993
Basalts 73 Ta 0.3           ppm Condie 1993
Basalts 73 Ta 0.88         10 ppm Farmer 2004 Chung et al. 2001
Basalts 73 Ta 0.3         7 ppm Farmer 2004 Conticelli et al. 1997
Basalts 73 Ta 0.62         27 ppm Farmer 2004 Farmer et al. 2002
Basalts 73 Ta 4         3 ppm Farmer 2004 Chung et al. 1995
Basalts 73 Ta 2.64         9 ppm Farmer 2004 Hoang & Flower 1998
Basalts 73 Ta 4.19         4 ppm Farmer 2004 Chung 1999
Basalts 73 Ta 1.24         13 ppm Farmer 2004 Robert et al. 1992
Basic Precambrian Granulites 73 Ta 1.6         25 ppm Shaw et al. 1986
Binda Eucrite 73 Ta 21           ng/g Mittlefehldt 2004 Barrat et al. 2000
McCarthy et al. 1973
Boninites 73 Ta 0.13         22 ppm Kelemen et al. 2004
Brown Clay 73 Ta 0.527         4 ppm Plank & Langmuir 1998
Brown Clay 73 Ta 0.628         29 ppm Plank & Langmuir 1998
Carbonate 73 Ta 0.056         13 ppm Plank & Langmuir 1998
Carbonate Turbidites   Nb/Ta 11.9   1.1     8   Plank & Langmuir 1998
Carbonate Turbidites 73 Ta 0.41         87 ppm Plank & Langmuir 1998
Carbonates 73 Ta 0.4         2038 ppm Gao et al. 1998
Carbonates 73 Ta 0.14         50 ppm Gao et al. 1998
Cascade Basalt 73 Ta 0.48         17 ppm Kelemen et al. 2004
Cascadia Trench 73 Ta 0.704           ppm Plank & Langmuir 1998
Central America Trench 73 Ta 0.127           ppm Plank & Langmuir 1998
Central American Basalts 73 Ta 0.29         17 ppm Kelemen et al. 2004
Central East China Craton   Nb/Ta 19.5             Gao et al. 1998
Central East China Craton   Nb/Ta 17.9             Gao et al. 1998
Central East China Craton   Nb/Ta 14.7             Gao et al. 1998
Central East China Craton   Nb/Ta 16.7             Gao et al. 1998
Central East China Craton   Nb/Ta 16.5             Gao et al. 1998
Central East China Craton   Nb/Ta 17.5             Gao et al. 1998
Central East China Craton   Nb/Ta 17.4             Gao et al. 1998
Central East China Craton   Nb/Ta 17.3             Gao et al. 1998
Central East China Craton 73 Ta 0.63           ppm Gao et al. 1998
Central East China Craton 73 Ta 0.58           ppm Gao et al. 1998
Central East China Craton 73 Ta 0.62           ppm Gao et al. 1998
Central East China Craton 73 Ta 0.6           ppm Gao et al. 1998
Central East China Craton 73 Ta 0.53           ppm Gao et al. 1998
Central East China Craton 73 Ta 0.55           ppm Gao et al. 1998
Central East China Craton 73 Ta 0.68           ppm Gao et al. 1998
Central East China Craton 73 Ta 0.55           ppm Gao et al. 1998
Central East China Craton 73 Ta 0.52           ppm Gao et al. 1998
Central East China Craton 73 Ta 0.74           ppm Gao et al. 1998
Central East China Craton 73 Ta 0.63           ppm Gao et al. 1998
Chassigny Meteorite 73 Ta 20           ppb McSween, Jr. 2004 Lodders 1998
Chaunskij Mesosiderite 73 Ta 52           ng/g Mittlefehldt 2004 Mittlefehldt in press
Petaev et al. 2000
Chert 73 Ta 0.406         4 ppm Plank & Langmuir 1998
Chert 73 Ta 0.182         4 ppm Plank & Langmuir 1998
Chert 73 Ta 0.41           ppm Elliot et al. 1997
CI Chondrites   Nb/Ta 17.6             McDonough 1990 McDonough & Frey 1989
Sun & McDonough 1989
Sun 1982
CI Chondrites 73 Ta 14.2   0.26     2 ppb Anders & Grevesse 1989
CI Chondrites 73 Ta 13.6           ppb McDonough & Sun 1995
CI Chondrites 73 Ta 0.02           ppm McDonough et al. 1992
CI Chondrites 73 Ta 0.0142           ppm Palme & Jones 2004 Anders & Grevesse 1989
CI Chondrites 73 Ta 14.2   0.852       ppb Palme & O'Neill 2004 Palme & Jones 2004
CI Chondrites 73 Ta 16           ppb McDonough & Sun 1995 Wasson & Kallemeyn 1988
CI Chondrites 73 Ta -0.14   0.06         Palme & Jones 2004
CI Chondrites 73 Ta 0.0142   0.000852       ppm Palme & Jones 2004 Palme & Beer 1993
Jochum et al. 2000
CI Chondrites 73 Ta 14           ppb McDonough & Sun 1995 Palme 1988
Clastic Turbidites 73 Ta 0.704         28 ppm Plank & Langmuir 1998
Colombia Trench 73 Ta 0.146           ppm Plank & Langmuir 1998
Congo River Particulates 73 Ta 1.1           µg/g Martin & Meybeck 1979
Continental Arc Andesite 73 Ta 0.45         83 ppm Kelemen et al. 2004
Continental Arc Andesite 73 Ta 0.85         22 ppm Kelemen et al. 2004
Continental Arcs 73 Ta 1.1           ppm Rudnick & Fountain 1995
Continental Arcs 73 Ta 0.6           ppm Rudnick & Fountain 1995
Continental Crust   Be/Ta 2.7             Salters & Stracke 2004
Continental Crust 73 Ta 0.7           µg/g Rudnick & Gao 2004 Rudnick & Fountain 1995
Continental Crust 73 Ta 0.7           µg/g Rudnick & Gao 2004
Continental Crust 73 Ta 0.7           µg/g Rudnick & Gao 2004 Rudnick & Fountain 1995
Continental Crust 73 Ta 0.8           µg/g Rudnick & Gao 2004 Taylor & McLennan 1985
Taylor & McLennan 1995
Continental Crust 73 Ta 1.1           ppm Wedepohl 1995
Continental Crust 73 Ta 1.1           ppm Rudnick & Fountain 1995
Continental Crust 73 Ta 1           ppm Taylor & McLennan 1995
Continental Crust 73 Ta 2           µg/g Rudnick & Gao 2004 Taylor 1964
Continental Crust 73 Ta 0.6           µg/g Rudnick & Gao 2004 Gao et al. 1998a
Continental Crust 73 Ta 1.1           µg/g Rudnick & Gao 2004 Wedepohl 1995
Continental Crust 73 Ta 4           ppm Shaw et al. 1986
Continental Crust 73 Ta 0.7           ppm Plank & Langmuir 1998
Continental Crust 73 Ta 1000           ppb Palme & O'Neill 2004 Rudnick & Gao 2004
Continental Crust 73 Ta 1.1           ppm Rudnick & Fountain 1995 Wedepohl 1995
Continental Crust 73 Ta 0.7           ppm Kemp & Hawkesworth 2004 Rudnick & Gao 2004
Continental Crust 73 Ta 4           µg/g Rudnick & Gao 2004 Shaw et al. 1986
Continental Intraplate Xenoliths 73 Ta 0.058           ppm Pearson et al. 2004 Eggins et al. 1998
Continental Intraplate Xenoliths 73 Ta 0.12           ppm Pearson et al. 2004 Bedini & Bodinier 1999
Continental Intraplate Xenoliths 73 Ta 1.33           ppm Pearson et al. 2004 Glaser et al. 1999
Continental Intraplate Xenoliths 73 Ta 0.04           ppm Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths 73 Ta 0.002           ppm Pearson et al. 2004 Bedini & Bodinier 1999
Continental Intraplate Xenoliths 73 Ta 0.002           ppm Pearson et al. 2004 Bedini & Bodinier 1999
Continental Intraplate Xenoliths 73 Ta 6.65           ppm Pearson et al. 2004 Ionov et al. 1997
Continental Intraplate Xenoliths 73 Ta 2.79           ppm Pearson et al. 2004 Gregoire et al. 2002
Continental Intraplate Xenoliths 73 Ta 0.001           ppm Pearson et al. 2004 Eggins et al. 1998
Continental Intraplate Xenoliths 73 Ta 0.041           ppm Pearson et al. 2004 Eggins et al. 1998
Continental Intraplate Xenoliths 73 Ta 0.001           ppm Pearson et al. 2004 Bedini & Bodinier 1999
Continental Intraplate Xenoliths 73 Ta 0.002           ppm Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths 73 Ta 0.007           ppm Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths 73 Ta 0.007           ppm Pearson et al. 2004 Eggins et al. 1998
Continental Intraplate Xenoliths 73 Ta 0.0033           ppm Pearson et al. 2004 Ionov 1996
Continental Intraplate Xenoliths 73 Ta 0.215           ppm Pearson et al. 2004 Eggins et al. 1998
Continental Intraplate Xenoliths 73 Ta 0.37           ppm Pearson et al. 2004 Ionov et al. 1997
Continental Intraplate Xenoliths 73 Ta 0.083           ppm Pearson et al. 2004 Johnson et al. 1996
Continental Intraplate Xenoliths 73 Ta 0.0001           ppm Pearson et al. 2004 Bedini & Bodinier 1999
Continental Shields & Platforms 73 Ta 1.1           ppm Rudnick & Fountain 1995
Continental Shields & Platforms 73 Ta 0.6           ppm Rudnick & Fountain 1995
Core 73 Ta 0           µg/g McDonough 1998
Cratonic Xenoliths 73 Ta 90           ppm Pearson et al. 2004 Gregoire et al. 2002
Cratonic Xenoliths 73 Ta 0.06           ppm Pearson et al. 2004 Gregoire et al. 2002
Cratonic Xenoliths 73 Ta 0.071           ppm Pearson et al. 2004
Cratonic Xenoliths 73 Ta 0.039           ppm Pearson et al. 2004
Cratonic Xenoliths 73 Ta 46           ppm Pearson et al. 2004 Gregoire et al. 2002
Cratonic Xenoliths 73 Ta 40           ppm Pearson et al. 2004 Gregoire et al. 2002
Cratonic Xenoliths 73 Ta 0.01           ppm Pearson et al. 2004 Gergoire et al. 2002
Cratonic Xenoliths 73 Ta 0.06           ppm Pearson et al. 2004 Gregoire et al. 2002
D'Orbigny Angrite 73 Ta 200           ng/g Mittlefehldt 2004 Mittlefehldt et al. 2002
Depleted D-MORB basalts   Nb/Ta 15.19             Salters & Stracke 2004
Depleted Mantle 73 Ta 0.0096     0.0082 0.0108   ppm Workman & Hart 2005
Depleted Mantle 73 Ta 13.8   4.554       ppb Salters & Stracke 2004
Depleted-Depleted MORB Mantle 73 Ta 0.0056           ppm Workman & Hart 2005
Diatom Oozes & Clay 73 Ta 0.321         15 ppm Plank & Langmuir 1998
Diatome Clay 73 Ta 0.42         6 ppm Plank & Langmuir 1998
Diatome Mud 73 Ta 0.354         6 ppm Plank & Langmuir 1998
Diatome Ooze 73 Ta 0.391         4 ppm Plank & Langmuir 1998
Diorite 73 Ta 1.46         260 ppm Gao et al. 1998
DSDP/ODP Site 800 73 Ta 0.647           ppm Plank & Langmuir 1998
DSDP/ODP Site 801 73 Ta 0.869           ppm Plank & Langmuir 1998
DSDP/ODP Site 801 73 Ta 0.87           ppm Elliot et al. 1997
E-MORB 73 Ta 0.77           ppm Klein 2004 Lehnert 2000
Early Archean Upper Crust   La/Ta 41             Condie 1993
Early Archean Upper Crust   La/Ta 42             Condie 1993
Early Archean Upper Crust   Nb/Ta 12             Condie 1993
Early Archean Upper Crust   Nb/Ta 12             Condie 1993
Early Archean Upper Crust 73 Ta 0.7           ppm Condie 1993
Early Archean Upper Crust 73 Ta 0.69           ppm Condie 1993
Early Proterozoic Upper Crust   La/Ta 33             Condie 1993
Early Proterozoic Upper Crust   La/Ta 33             Condie 1993
Early Proterozoic Upper Crust   Nb/Ta 13             Condie 1993
Early Proterozoic Upper Crust   Nb/Ta 13             Condie 1993
Early Proterozoic Upper Crust 73 Ta 0.95           ppm Condie 1993
Early Proterozoic Upper Crust 73 Ta 0.88           ppm Condie 1993
East China Craton 73 Ta 0.61           ppm Gao et al. 1998
East China Craton 73 Ta 0.63           ppm Gao et al. 1998
East Sunda Trench 73 Ta 0.693           ppm Plank & Langmuir 1998
EET 84302 Acapulcoite 73 Ta 10           ng/g Mittlefehldt 2004 Weigel et al. 1999
Enriched-Depleted MORB Mantle 73 Ta 0.0159           ppm Workman & Hart 2005
Estherville Mesosiderite 73 Ta 69           ng/g Mittlefehldt 2004 Mittlefehldt in press
Simpson & Ahrens 1977
Felsic Archean Granulites 73 Ta 0.58 0.35       34 ppm Rudnick & Fountain 1995
Felsic Granulites 73 Ta 0.4         137 ppm Gao et al. 1998
Felsic Post-Archean Granulites 73 Ta 0.8 0.5       1 ppm Rudnick & Fountain 1995
Felsic Volcanics 73 Ta 0.8           ppm Condie 1993
Felsic Volcanics 73 Ta 1           ppm Condie 1993
Felsic Volcanics 73 Ta 0.88         972 ppm Gao et al. 1998
Felsic Volcanics 73 Ta 1.3           ppm Condie 1993
Felsic Volcanics 73 Ta 1.6           ppm Condie 1993
Felsic Volcanics 73 Ta 1.4           ppm Condie 1993
Felsic Volcanics 73 Ta 1.2           ppm Condie 1993
Felsic Volcanics 73 Ta 1.7           ppm Condie 1993
Frankfort Howardites 73 Ta 40           ng/g Mittlefehldt 2004 McCarthy et al. 1972
Palme et al. 1978
Fresh Mid-Ocean Ridge Basalts   Nb/Ta 14.73             Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts 73 Ta 0.31         28 ppm Kelemen et al. 2004
Ganges River Particulates 73 Ta 1.25           µg/g Martin & Meybeck 1979
Gibson Lodranite 73 Ta 14           ng/g Mittlefehldt 2004 Weigel et al. 1999
Granites 73 Ta 1.5           ppm Condie 1993
Granites 73 Ta 1           ppm Condie 1993
Granites 73 Ta 1.7           ppm Condie 1993
Granites 73 Ta 0.45         8 ppm Kemp & Hawkesworth 2004 Kemp 2001
Granites 73 Ta 1.8         1226 ppm Gao et al. 1998
Granites 73 Ta 0.7         402 ppm Gao et al. 1998
Granites 73 Ta 0.93           ppm Kemp & Hawkesworth 2004 Sylvester 1995
Granulites 73 Ta 0.52 0.25       50 ppm Rudnick & Presper 1990
Granulites 73 Ta 1.55         16 ppm Rudnick & Presper 1990
Granulitic Xenolites 73 Ta 0.6         14 ppm Rudnick & Presper 1990
Graywackes 73 Ta 0.7           ppm Condie 1993
Graywackes 73 Ta 0.76           ppm Condie 1993
Graywackes 73 Ta 0.9           ppm Condie 1993
Graywackes 73 Ta 0.85           ppm Condie 1993
Graywackes 73 Ta 0.8           ppm Condie 1993
Graywackes 73 Ta 0.8           ppm Condie 1993
Green Clay 73 Ta 0.634         3 ppm Plank & Langmuir 1998
Hydrothermal Sediment 73 Ta 0.155         4 ppm Plank & Langmuir 1998
Ibitira Eucrite 73 Ta 153           ng/g Mittlefehldt 2004 Jarosewich 1990
Barrat et al. 2000
Interior North China Craton 73 Ta 0.56           ppm Gao et al. 1998
Interior North China Craton 73 Ta 0.42           ppm Gao et al. 1998
Interior North China Craton 73 Ta 0.61           ppm Gao et al. 1998
Interior North China Craton 73 Ta 0.68           ppm Gao et al. 1998
Interior North China Craton 73 Ta 0.49           ppm Gao et al. 1998
Interlayerd Clay & Chert 73 Ta 0.07         2 ppm Plank & Langmuir 1998
Interlayered Chert & Limestone 73 Ta 0.187         5 ppm Plank & Langmuir 1998
Interlayered Clay & Chert 73 Ta 0.483         12 ppm Plank & Langmuir 1998
Intermediate Granulites 73 Ta 0.4         136 ppm Gao et al. 1998
Intermediate Mafic Archean Granulites 73 Ta 0.62 0.63       5 ppm Rudnick & Fountain 1995
Intermediate Mafic Granulitic Xenolites 73 Ta 0.6         1 ppm Rudnick & Fountain 1995
Intermediate Mafic Post-Archean Granulites 73 Ta 1.4 1.4       4 ppm Rudnick & Fountain 1995
Intermediate Precambrian Granulites 73 Ta 1.6         26 ppm Shaw et al. 1986
Island Arc Andesite 73 Ta 0.08         4 ppm Kelemen et al. 2004
Island Arc Andesite 73 Ta 0.24         64 ppm Kelemen et al. 2004
Izu-Bonin Trench 73 Ta 0.239           ppm Plank & Langmuir 1998
Japan Trench 73 Ta 0.319           ppm Plank & Langmuir 1998
Java Trench 73 Ta 0.848           ppm Plank & Langmuir 1998
Kamchatka Basalt 73 Ta 0.13         22 ppm Kelemen et al. 2004
Kamchatka Trench 73 Ta 0.133           ppm Plank & Langmuir 1998
Kapoeta Howardites 73 Ta 100           ng/g Mittlefehldt 2004 Wanke et al. 1972
Kerm Trench 73 Ta 651           ppm Plank & Langmuir 1998
Kermadec Basalts 73 Ta 0.26         10 ppm Kelemen et al. 2004
Kimberlite 73 Ta 15.72         22 ppm Farmer 2004 Taylor et al. 1994
Komatiites 73 Ta 0.05           ppm Condie 1993
Kuriles Trench 73 Ta 0.319           ppm Plank & Langmuir 1998
Late Archean Upper Crust   La/Ta 43             Condie 1993
Late Archean Upper Crust   La/Ta 42             Condie 1993
Late Archean Upper Crust   Nb/Ta 12             Condie 1993
Late Archean Upper Crust   Nb/Ta 12             Condie 1993
Late Archean Upper Crust 73 Ta 0.69           ppm Condie 1993
Late Archean Upper Crust 73 Ta 0.69           ppm Condie 1993
Late Proterozoic Upper Crust   La/Ta 32             Condie 1993
Late Proterozoic Upper Crust   La/Ta 32             Condie 1993
Late Proterozoic Upper Crust   Nb/Ta 13             Condie 1993
Late Proterozoic Upper Crust   Nb/Ta 13             Condie 1993
Late Proterozoic Upper Crust 73 Ta 0.97           ppm Condie 1993
Late Proterozoic Upper Crust 73 Ta 0.9           ppm Condie 1993
Lesser Antilles Basalt 73 Ta 0.26         11 ppm Kelemen et al. 2004
Lower Continental Crust 73 Ta 0.3           µg/g Rudnick & Gao 2004 Liu et al. 2001
Lower Continental Crust 73 Ta 1.3           µg/g Rudnick & Gao 2004 Shaw et al. 1994
Lower Continental Crust 73 Ta 2.1           µg/g Rudnick & Gao 2004 Villaseca et al. 1999
Lower Continental Crust 73 Ta 0.5           µg/g Rudnick & Gao 2004 Condie & Selverstone 1999
Lower Continental Crust 73 Ta 0.5           µg/g Rudnick & Gao 2004 Rudnick & Presper 1990
Lower Continental Crust 73 Ta 0.6           ppm Kemp & Hawkesworth 2004 Rudnick & Gao 2004
Lower Continental Crust 73 Ta 2           ppm Shaw et al. 1986
Lower Continental Crust 73 Ta 0.6           ppm Rudnick & Fountain 1995
Lower Continental Crust 73 Ta 0.6           ppm Taylor & McLennan 1995
Lower Continental Crust 73 Ta 0.84           ppm Wedepohl 1995
Lower Continental Crust 73 Ta 0.8           µg/g Rudnick & Gao 2004 Wedepohl 1995
Lower Continental Crust 73 Ta 0.6           µg/g Rudnick & Gao 2004 Rudnick & Fountain 1995
Lower Continental Crust 73 Ta 0.6           µg/g Rudnick & Gao 2004 Gao et al. 1998a
Lower Continental Crust 73 Ta 0.7           µg/g Rudnick & Gao 2004 Taylor & McLennan 1985
Taylor & McLennan 1995
Lower Continental Crust 73 Ta 0.6           µg/g Rudnick & Gao 2004 Rudnick & Fountain 1995
Luzon Basalt 73 Ta 0.16         5 ppm Kelemen et al. 2004
MAC 88177 Lodranite 73 Ta 14           ng/g Mittlefehldt 2004 Weigel et al. 1999
Macibini Eucrites 73 Ta 180           ng/g Mittlefehldt 2004 McCarthy et al. 1973
Buchanan et al. 2000b
Mafic Archean Granulites 73 Ta 0.3 0.2       8 ppm Rudnick & Fountain 1995
Mafic Granulites 73 Ta 0.65         128 ppm Gao et al. 1998
Mafic Granulitic Xenolites 73 Ta 0.55 0.5       18 ppm Rudnick & Fountain 1995
Mafic Intrusions 73 Ta 0.72         308 ppm Gao et al. 1998
Mafic Post-Archean Granulites 73 Ta 0.6 0.2       12 ppm Rudnick & Fountain 1995
Makran Trench 73 Ta 0.925           ppm Plank & Langmuir 1998
Malvern Howardites 73 Ta 110           ng/g Mittlefehldt 2004 Palme et al. 1978
Manganese Nodules 73 Ta 10           ppm Li 1991 Baturin 1988
Marianas Basalt 73 Ta 0.14         12 ppm Kelemen et al. 2004
Marianas Trench 73 Ta 0.758           ppm Plank & Langmuir 1998
Marine Pelagic Clay 73 Ta 1           ppm Li 1982 Turekian & Wedepohl 1961
Brewer 1975

Marine Pelagic Clay 73 Ta 1           ppm Li 1991 Turekian & Wedepohl 1961
Marine Shales 73 Ta 0.8           ppm Li 1991 Turekian & Wedepohl 1961
Mavic Volcanics 73 Ta 1.04         632 ppm Gao et al. 1998
Mekong River Particulates 73 Ta 1.35           µg/g Martin & Meybeck 1979
Mesozoic & Cenozoic Extensions 73 Ta 0.8           ppm Rudnick & Fountain 1995
Mesozoic & Cenozoic Extensions 73 Ta 1.2           ppm Rudnick & Fountain 1995
Mesozoic & Cenozoic Orogens 73 Ta 0.8           ppm Rudnick & Fountain 1995
Mesozoic & Cenozoic Orogens 73 Ta 1.2           ppm Rudnick & Fountain 1995
Mesozoic & Cenozoic Upper Crust   La/Ta 28             Condie 1993
Mesozoic & Cenozoic Upper Crust   La/Ta 28             Condie 1993
Mesozoic & Cenozoic Upper Crust   Nb/Ta 13             Condie 1993
Mesozoic & Cenozoic Upper Crust   Nb/Ta 13             Condie 1993
Mesozoic & Cenozoic Upper Crust 73 Ta 0.96           ppm Condie 1993
Mesozoic & Cenozoic Upper Crust 73 Ta 0.9           ppm Condie 1993
Metafelsic Volcanics 73 Ta 0.56         41 ppm Gao et al. 1998
Metalliferous Clay 73 Ta 0.867         12 ppm Plank & Langmuir 1998
Metapelitic Granulitic Xenolites 73 Ta 1.3 1       15 ppm Rudnick & Fountain 1995
Mexico Trench 73 Ta 0.675           ppm Plank & Langmuir 1998
Middle Continental Crust 73 Ta 0.6           ppm Rudnick & Fountain 1995
Middle Continental Crust 73 Ta 0.6           ppm Kemp & Hawkesworth 2004 Rudnick & Gao 2004
Middle Continental Crust 73 Ta 1.8           µg/g Rudnick & Gao 2004 Shaw et al. 1994
Middle Continental Crust 73 Ta 0.6           µg/g Rudnick & Gao 2004 Rudnick & Fountain 1995
Middle Continental Crust 73 Ta 0.55           µg/g Rudnick & Gao 2004 Gao et al. 1998
Middle Continental Crust 73 Ta 0.6   0.04       µg/g Rudnick & Gao 2004
Middle Proterozoic Upper Crust   La/Ta 33             Condie 1993
Middle Proterozoic Upper Crust   La/Ta 32             Condie 1993
Middle Proterozoic Upper Crust   Nb/Ta 13             Condie 1993
Middle Proterozoic Upper Crust   Nb/Ta 13             Condie 1993
Middle Proterozoic Upper Crust 73 Ta 0.86           ppm Condie 1993
Middle Proterozoic Upper Crust 73 Ta 0.94           ppm Condie 1993
Moore County Eucrite 73 Ta 30           ng/g Mittlefehldt 2004 Barrat et al. 2000
McCarthy et al. 1973
N-MORB 73 Ta 0.309           ppm Klein 2004 Thompson et al. 1980
N-MORB 73 Ta 0.203           ppm Klein 2004 Niu et al. 1999
N-MORB 73 Ta 0.192   0.106     26 ppm Hofmann 1988 Jochum et al. 1988
N-MORB 73 Ta 0.13           ppm Klein 2004 Lehnert 2000
Nakhla Meteorite 73 Ta 90           ppb McSween, Jr. 2004 Lodders 1998
Nankai Trench 73 Ta 1.008           ppm Plank & Langmuir 1998
Nanno Ooze 73 Ta 0.05         2 ppm Plank & Langmuir 1998
Nano Ooze 73 Ta 0.135         4 ppm Plank & Langmuir 1998
New Hebrides Islands 73 Ta 0.16         6 ppm Kelemen et al. 2004
North American Shale Composite (NASC) 73 Ta 1.1           ppm Condie 1993
North Antilles Trench 73 Ta 1.118           ppm Plank & Langmuir 1998
North Qinling Belt in China 73 Ta 1           ppm Gao et al. 1998
North Qinling Belt in China 73 Ta 0.66           ppm Gao et al. 1998
North Qinling Belt in China 73 Ta 1.15           ppm Gao et al. 1998
North Qinling Belt in China 73 Ta 1.31           ppm Gao et al. 1998
North Qinling Belt in China 73 Ta 1.2           ppm Gao et al. 1998
Nuevo Laredo Eucrite 73 Ta 178           ng/g Mittlefehldt 2004 Warren & Jerde 1987
Oceanic Plateaus 73 Ta 0.23           ppm Kerr 2004 Hauff et al. 2000
Oceanic Plateaus 73 Ta 7.47           ppm Kerr 2004 Salters et al. 1992
Oceanic Plateaus 73 Ta 0.48           ppm Kerr 2004 Kerr et al. 1997
Hauff et al. 2000
Oceanic Plateaus 73 Ta 0.3           ppm Kerr 2004 Kerr et al. 1997
Hauff et al. 2000
Oceanic Plateaus 73 Ta 8.6           ppm Kerr 2004 Kerr et al. 1996
Oceanic Plateaus 73 Ta 0.2           ppm Kerr 2004 Mahoney et al. 1993
Oceanic Plateaus 73 Ta 0.35           ppm Kerr 2004 Tejada et al. 2002
Oceanic Plateaus 73 Ta 9.08           ppm Kerr 2004 Salters et al. 1992
Oceanic Plateaus 73 Ta 0.25           ppm Kerr 2004 Tejada et al. 2002
Oceanic Plateaus 73 Ta 7.3           ppm Kerr 2004 Tejada et al. 2002
Oceanic Plateaus 73 Ta 7.45           ppm Kerr 2004 Tejada et al. 2002
Oceanic Plateaus 73 Ta 7.22           ppm Kerr 2004 Salters et al. 1992
Oceanic Plateaus 73 Ta 8.58           ppm Kerr 2004 Hauff et al. 2000
Oceanic Plateaus 73 Ta 18.25           ppm Kerr 2004 Aitken & Echeverria 1984
Dupre & Echeverria 1984
Jochum et al. 1991
Oceanic Plateaus 73 Ta 0.4           ppm Kerr 2004 Salters et al. 1992
Oceanic Plateaus 73 Ta 8.65           ppm Kerr 2004 Aitken & Echeverria 1984
Dupre & Echeverria 1984
Jochum et al. 1991
Oceanic Plateaus 73 Ta 8.36           ppm Kerr 2004 Salters et al. 1992
Oceanic Plateaus 73 Ta 8.96           ppm Kerr 2004 Reynaud et al. 1999
Oceanic Plateaus 73 Ta 7.43           ppm Kerr 2004 Mahoney et al. 1993
Oceanic Plateaus 73 Ta 0.19           ppm Kerr 2004 Salters et al. 1992
Oceanic Plateaus 73 Ta 5.51           ppm Kerr 2004 Mahoney et al. 1995
Oceanic Plateaus 73 Ta 0.58           ppm Kerr 2004 Reynaud et al. 1999
Oceanic Plateaus 73 Ta 0.54           ppm Kerr 2004 Mahoney et al. 1995
Oceanic Plateaus 73 Ta 6.74           ppm Kerr 2004 Mahoney et al. 1993
Oceanic Plateaus 73 Ta 21.96           ppm Kerr 2004
Oceanic Plateaus 73 Ta 6.77           ppm Kerr 2004 Kerr et al. 1997
Hauff et al. 2000
Oceanic Plateaus 73 Ta 8.03           ppm Kerr 2004 Tejada et al. 1996
Oceanic Plateaus 73 Ta 5.78           ppm Kerr 2004 Kerr et al. 1997
Hauff et al. 2000
Oceanic Plateaus 73 Ta 11.55           ppm Kerr 2004 Kerr et al. 2002
Oceanic Plateaus 73 Ta 22.86           ppm Kerr 2004 Kerr et al. 1996
Oceanic Plateaus 73 Ta 0.46           ppm Kerr 2004 Salters et al. 1992
Oceanic Plateaus 73 Ta 7.54           ppm Kerr 2004 Salters et al. 1992
Oceanic Plateaus 73 Ta 0.34           ppm Kerr 2004 Mahoney et al. 1993
Oceans Surface water 73 Ta         2.5   ng/kg Quinby-Hunt & Turekian 1983 Schutz & Turekian 1965
ODP/DSDP Site 417/418 73 Ta 0.097           ppm Staudigel et al. 1996
Orangeite 73 Ta 8.5         114 ppm Farmer 2004 Mitchell 1995
Orgueil Chondrite 73 Ta 17         1 ppb Anders & Ebihara 1982
Orgueil Chondrite 73 Ta 14         1 ppb Anders & Grevesse 1989
Paleozoic Orogens 73 Ta 0.7           ppm Rudnick & Fountain 1995
Paleozoic Orogens 73 Ta 0.9           ppm Rudnick & Fountain 1995
Paleozoic Upper Crust   La/Ta 28             Condie 1993
Paleozoic Upper Crust   La/Ta 28             Condie 1993
Paleozoic Upper Crust   Nb/Ta 13             Condie 1993
Paleozoic Upper Crust   Nb/Ta 13             Condie 1993
Paleozoic Upper Crust 73 Ta 0.9           ppm Condie 1993
Paleozoic Upper Crust 73 Ta 0.97           ppm Condie 1993
Parana River Particulates 73 Ta 1.1           µg/g Martin & Meybeck 1979
Pelagic Clay   Nb/Ta 12.6   1.6     7   Plank & Langmuir 1998
Pelagic Clay   Nb/Ta 21.8   4.3     9   Plank & Langmuir 1998
Pelagic Clay 73 Ta 0.739         56 ppm Plank & Langmuir 1998
Pelagic Clay 73 Ta 0.81           ppm Elliot et al. 1997
Pelagic Clay 73 Ta 0.739         56 ppm Plank & Langmuir 1998
Pelagic Clay 73 Ta 1.056         8 ppm Plank & Langmuir 1998
Pelagic Clay 73 Ta 0.833         6 ppm Plank & Langmuir 1998
Pelagic Clay 73 Ta 1.008         55 ppm Plank & Langmuir 1998
Pelagic Clay 73 Ta 0.81         6 ppm Plank & Langmuir 1998
Pelagic Clay 73 Ta 0.053         3 ppm Plank & Langmuir 1998
Pelites 73 Ta 0.95         69 ppm Gao et al. 1998
Pelites 73 Ta 1.18         1341 ppm Gao et al. 1998
Peninsular Range Batholith 73 Ta 0.29           ppm Kemp & Hawkesworth 2004 Sylvester 1995
Peru Trench 73 Ta 0.261           ppm Plank & Langmuir 1998
Petersburg Eucrites 73 Ta 144           ng/g Mittlefehldt 2004 Mason et al. 1979
Buchanan & Reid 1996
Phanerozoic Flood Basalts 73 Ta 0.8         6 ppm Farmer 2004 Lightfoot et al. 1990
Phanerozoic Flood Basalts 73 Ta 0.92         36 ppm Farmer 2004 Hooper & Hawkesworth 1993
Phanerozoic Flood Basalts 73 Ta 1.3         18 ppm Farmer 2004 Lightfoot et al. 1990
Phanerozoic Flood Basalts 73 Ta 0.48         9 ppm Farmer 2004 Wooden et al. 1993
Phanerozoic Flood Basalts 73 Ta 1.92         1 ppm Farmer 2004 Peate 1997
Phanerozoic Flood Basalts 73 Ta 0.5         1 ppm Farmer 2004 Peate 1997
Phanerozoic Flood Basalts 73 Ta 0.37         1 ppm Farmer 2004 Peate 1997
Phanerozoic Flood Basalts 73 Ta 0.47         7 ppm Farmer 2004 Wooden et al. 1993
Philip Trench 73 Ta 0.287           ppm Plank & Langmuir 1998
Precambrian Canadian Shield 73 Ta 5.7           ppm Shaw et al. 1986
Precambrian Granulites 73 Ta 2.3         88 ppm Shaw et al. 1986
Primitive Mantle   Nb/Ta 17.6             Gao et al. 1998 Hofmann 1988
Primitive Mantle   Nb/Ta 17.6             McDonough 1990 McDonough & Frey 1989
Sun & McDonough 1989
Sun 1982
Primitive Mantle 73 Ta 0.035           ppm Wedepohl & Hartmann 1994 Hofmann 1988
Primitive Mantle 73 Ta 40   4       ppb Palme & O'Neill 2004
Primitive Mantle 73 Ta 40           ppb Palme & O'Neill 2004
Primitive Mantle 73 Ta 0.0351           ppm Hofmann 1988 Hart & Zindler 1986
Primitive Mantle 73 Ta 37   5.6       ppb McDonough & Sun 1995
Primitive Mantle 73 Ta 0.03           ppm Wedepohl & Hartmann 1994 Jagoutz et al. 1979
Protolith Gabbros at ODP Site 735 73 Ta 0.04         8 ppm Hart et al. 1999
QUE 94201 Meteorite 73 Ta 23           ppb McSween, Jr. 2004 Lodders 1998
Radiolarian Clay 73 Ta 0.89         8 ppm Plank & Langmuir 1998
Radiolarian Clay 73 Ta 0.65         2 ppm Plank & Langmuir 1998
Radiolarian Clay 73 Ta 0.89         8 ppm Plank & Langmuir 1998
Radiolarites   Nb/Ta 15.5   2.9     7   Plank & Langmuir 1998
Radiolarites 73 Ta 0.33         17 ppm Plank & Langmuir 1998
Radiolarites 73 Ta 0.29           ppm Elliot et al. 1997
Radiolarites 73 Ta 0.285         4 ppm Plank & Langmuir 1998
Red Clay   Nb/Ta 15.3         1   Plank & Langmuir 1998
Rifted Continental Margins 73 Ta 0.6           ppm Rudnick & Fountain 1995
Rifted Continental Margins 73 Ta 1.1           ppm Rudnick & Fountain 1995
River Particulates 73 Ta 1.25           µg/g Martin & Meybeck 1979
Ryuku Trench 73 Ta 0.831           ppm Plank & Langmuir 1998
Sandstones 73 Ta 0.31           ppm Condie 1993
Sandstones 73 Ta 0.3           ppm Condie 1993
Sandstones 73 Ta 0.24           ppm Condie 1993
Scotia Island Basalt 73 Ta 0.5         11 ppm Kelemen et al. 2004
Seawater 73 Ta         14     Bruland 1983
Seawater 73 Ta 0.002           ppb Li 1982
Seawater 73 Ta         1.4e-05     Broeker & Peng 1982
Seawater 73 Ta         2.5   ng/kg Quinby-Hunt & Turekian 1983 Schutz & Turekian 1965
Seawater 73 Ta         2.5     Li 1991 Whitfield & Turner 1987
Bruland 1983
Serra De Mage Eucrite 73 Ta 31           ng/g Mittlefehldt 2004 Barrat et al. 2000
McCarthy et al. 1973
Shales 73 Ta 1.4           ppm Condie 1993
Shales 73 Ta 1.4           ppm Condie 1993
Shales 73 Ta 0.84           ppm Condie 1993
Shergotty Meteorite 73 Ta 250   40       ppb McSween, Jr. 2004 Lodders 1998
Silicate Earth 73 Ta 37   5.6       ppb McDonough & Sun 1995
Silicate Earth 73 Ta 0.037           ppm McDonough 2004
Silicate Earth 73 Ta 0.04           ppm McDonough et al. 1992 Taylor & McLennan 1985
Silicate Earth 73 Ta 0.0351           ppm McDonough et al. 1992 Hofmann 1988
Silicate Earth 73 Ta 0.038           ppm McDonough et al. 1992 Jagoutz et al. 1979
Wanke et al. 1984
Silicate Earth 73 Ta 0.041           ppm McDonough et al. 1992 Sun 1982
Sun & McDonough 1989
McDonough & Frey 1989
Silicate Earth 73 Ta 0.037           µg/g McDonough 1998
Silicic Precambrian Granulites 73 Ta 2.9         23 ppm Shaw et al. 1986
Silicified Limestone 73 Ta 0.17           ppm Plank & Langmuir 1998
Silty Mud 73 Ta 0.703         16 ppm Plank & Langmuir 1998
Sioux County Eucrite 73 Ta 147           ng/g Mittlefehldt 2004 Barrat et al. 2000
McCarthy et al. 1973
Solar System 73 Ta 0.0207   0.000373     2   Anders & Grevesse 1989
Solar System 73 Ta 0.02             Anders & Ebihara 1982 Cameron 1982
Solar System 73 Ta 0.0226   0.00226     1   Anders & Ebihara 1982
Solid Earth 73 Ta 0.025           µg/g McDonough 1998
Solid Earth 73 Ta 0.025           ppm McDonough 2004
South Antilles Trench 73 Ta 1.3           ppm Plank & Langmuir 1998
South Margin of North China Craton 73 Ta 0.78           ppm Gao et al. 1998
South Margin of North China Craton 73 Ta 0.57           ppm Gao et al. 1998
South Margin of North China Craton 73 Ta 0.63           ppm Gao et al. 1998
South Margin of North China Craton 73 Ta 0.51           ppm Gao et al. 1998
South Margin of North China Craton 73 Ta 0.73           ppm Gao et al. 1998
South Qinling Belt in China 73 Ta 0.78           ppm Gao et al. 1998
South Qinling Belt in China 73 Ta 0.84           ppm Gao et al. 1998
South Qinling Belt in China 73 Ta 0.72           ppm Gao et al. 1998
South Qinling Belt in China 73 Ta 0.66           ppm Gao et al. 1998
South Sandwich Trench 73 Ta 0.321           ppm Plank & Langmuir 1998
Spinel Peridotites   Nb/Ta 17 17 3     4   McDonough 1990
Spinel Peridotites 73 Ta 0.4 0.23 0.51     38 ppm McDonough 1990
Stannern Eucrite 73 Ta 368           ng/g Mittlefehldt 2004 Barrat et al. 2000
McCarthy et al. 1973
Subducted Sediment   Nb/Ta 14.2   1.8     50   Plank & Langmuir 1998
Subducted Sediment 73 Ta 0.63   0.06       ppm Plank & Langmuir 1998
Sumatra Trench 73 Ta 0.803           ppm Plank & Langmuir 1998
Talkeetna Arc Plutonic Rocks 73 Ta 0.012   0.001     16 ppm Kelemen et al. 2004
Talkeetna Arc Plutonic Rocks 73 Ta 0.028   0.001     31 ppm Kelemen et al. 2004
Talkeetna Arc Plutonic Rocks 73 Ta 0.147   0.003     42 ppm Kelemen et al. 2004
Talkeetna Arc Plutonic Rocks 73 Ta 0.05   0.012     6 ppm Kelemen et al. 2004
Talkeetna Arc Plutonic Rocks 73 Ta 0.174   0.009     13 ppm Kelemen et al. 2004
Talkeetna Arc Plutonic Rocks 73 Ta 0.116   0.036     7 ppm Kelemen et al. 2004
Terrigenous Sediments   Nb/Ta 13.5   2.4     15   Plank & Langmuir 1998
Tonalites 73 Ta 1.1           ppm Wedepohl 1995
Tonalites-Trondhjemites-Granodiorites 73 Ta 0.71         355 ppm Kemp & Hawkesworth 2004 Martin 1995
Tonalites-Trondhjemites-Granodiorites 73 Ta 0.7           ppm Condie 1993
Tonalites-Trondhjemites-Granodiorites 73 Ta 0.65           ppm Condie 1993
Tonalites-Trondhjemites-Granodiorites 73 Ta 0.8           ppm Condie 1993
Tonalites-Trondhjemites-Granodiorites 73 Ta 0.39         553 ppm Gao et al. 1998
Tonalites-Trondhjemites-Granodiorites 73 Ta 0.93         641 ppm Gao et al. 1998
Tonga Trench 73 Ta 0.552           ppm Plank & Langmuir 1998
Tongan Basalts 73 Ta 0.04         5 ppm Kelemen et al. 2004
Transitional Mid-Ocean Ridge Basalts 73 Ta 0.38           ppm Klein 2004 Lehnert 2000
Turbidites 73 Ta 0.5         4 ppm Plank & Langmuir 1998
Turbidites 73 Ta 0.797         4 ppm Plank & Langmuir 1998
Ultrabasic Precambrian Granulites 73 Ta 2.4         14 ppm Shaw et al. 1986
Upper Continental Crust   La/Ta 36             Condie 1993
Upper Continental Crust   La/Ta 35             Condie 1993
Upper Continental Crust   Nb/Ta 12             Condie 1993
Upper Continental Crust   Nb/Ta 13             Condie 1993
Upper Continental Crust 73 Ta 0.9           ppm Kemp & Hawkesworth 2004 Rudnick & Gao 2004
Upper Continental Crust 73 Ta 5.7           µg/g Rudnick & Gao 2004 Shaw et al. 1967
Shaw et al. 1976
Upper Continental Crust 73 Ta 0.79           µg/g Rudnick & Gao 2004 Condie 1993
Upper Continental Crust 73 Ta 0.74           µg/g Rudnick & Gao 2004 Gao et al. 1998
Upper Continental Crust 73 Ta 0.96           µg/g Rudnick & Gao 2004 Plank & Langmuir 1998
Upper Continental Crust 73 Ta 1           µg/g Rudnick & Gao 2004 Taylor & McLennan 1985
Taylor & McLennan 1995
Upper Continental Crust 73 Ta 0.9   0.1       µg/g Rudnick & Gao 2004 see text









Upper Continental Crust 73 Ta 1.5           µg/g Rudnick & Gao 2004 Wedepohl 1995
Upper Continental Crust 73 Ta 0.82           ppm Condie 1993
Upper Continental Crust 73 Ta 0.79           ppm Condie 1993
Upper Continental Crust 73 Ta 0.96   0.12       ppm Plank & Langmuir 1998
Upper Continental Crust 73 Ta 0.9           µg/g Rudnick & Gao 2004
Upper Continental Crust 73 Ta 2.2           ppm Taylor & McLennan 1995
Upper Continental Crust 73 Ta 1.5           ppm Wedepohl 1995
Vanuatu Trench 73 Ta 0.136           ppm Plank & Langmuir 1998
Volcanoclastic Sediment 73 Ta 0.119         15 ppm Plank & Langmuir 1998
Volcanoclastic Turbidites 73 Ta 1.66           ppm Elliot et al. 1997
Volcanoclastic Turbidites 73 Ta 1.226         43 ppm Plank & Langmuir 1998
Volcanoclastic Turbidites 73 Ta 1.663         13 ppm Plank & Langmuir 1998
Watson IIE Iron 73 Ta 8.9           ng/g Mittlefehldt 2004 Olsen et al. 1994
Y-74450 Eucrites 73 Ta 300           ng/g Mittlefehldt 2004 Wanke et al. 1977
Y-791491 Lodranite 73 Ta 11           ng/g Mittlefehldt 2004 Weigel et al. 1999
Yangtze Craton 73 Ta 0.59           ppm Gao et al. 1998
Yangtze Craton 73 Ta 0.57           ppm Gao et al. 1998
Yangtze Craton 73 Ta 0.73           ppm Gao et al. 1998
Yangtze Craton 73 Ta 0.68           ppm Gao et al. 1998
Yangtze Craton 73 Ta 0.64           ppm Gao et al. 1998
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