GERM Reservoir Database
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GERM Database Search Results
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Reservoir
Z
Element
Value
Median
SD
Low
High
N
Unit
Reference
===========
Default
Units ...
=======
ppm
ppb
ppt
wt%
wt%ox
=======
Default
Reservoir
Z
Element
Value
Median
SD
Low
High
N
Unit
Info
Reference
Source(s)
CI Chondrites
73
Ta
-0.14
0.06
Palme & Jones 2004
Continental Intraplate Xenoliths
73
Ta
0.0001
ppm
Pearson et al. 2004
Bedini & Bodinier 1999
Continental Intraplate Xenoliths
73
Ta
0.001
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
Bedini & Bodinier 1999
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
Ionov 1996
Seawater
73
Ta
0.002
ppb
Li 1982
Continental Intraplate Xenoliths
73
Ta
0.0033
ppm
Pearson et al. 2004
Ionov 1996
Depleted-Depleted MORB Mantle
73
Ta
0.0056
ppm
Workman & Hart 2005
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
Depleted Mantle
73
Ta
0.0096
0.0082
0.0108
ppm
Workman & Hart 2005
Cratonic Xenoliths
73
Ta
0.01
ppm
Pearson et al. 2004
Gergoire et al. 2002
Talkeetna Arc Plutonic Rocks
73
Ta
0.012
0.001
16
ppm
Kelemen et al. 2004
CI Chondrites
73
Ta
0.0142
0.000852
ppm
Palme & Jones 2004
Palme & Beer 1993
Jochum et al. 2000
CI Chondrites
73
Ta
0.0142
ppm
Palme & Jones 2004
Anders & Grevesse 1989
Enriched-Depleted MORB Mantle
73
Ta
0.0159
ppm
Workman & Hart 2005
CI Chondrites
73
Ta
0.02
ppm
McDonough et al. 1992
Solar System
73
Ta
0.02
Anders & Ebihara 1982
Cameron 1982
Solar System
73
Ta
0.0207
0.000373
2
Anders & Grevesse 1989
Solar System
73
Ta
0.0226
0.00226
1
Anders & Ebihara 1982
Solid Earth
73
Ta
0.025
ppm
McDonough 2004
Solid Earth
73
Ta
0.025
µg/g
McDonough 1998
Talkeetna Arc Plutonic Rocks
73
Ta
0.028
0.001
31
ppm
Kelemen et al. 2004
Primitive Mantle
73
Ta
0.03
ppm
Wedepohl & Hartmann 1994
Jagoutz et al. 1979
Primitive Mantle
73
Ta
0.035
ppm
Wedepohl & Hartmann 1994
Hofmann 1988
Primitive Mantle
73
Ta
0.0351
ppm
Hofmann 1988
Hart & Zindler 1986
Silicate Earth
73
Ta
0.0351
ppm
McDonough et al. 1992
Hofmann 1988
Silicate Earth
73
Ta
0.037
µg/g
McDonough 1998
Silicate Earth
73
Ta
0.037
ppm
McDonough 2004
Silicate Earth
73
Ta
0.038
ppm
McDonough et al. 1992
Jagoutz et al. 1979
Wanke et al. 1984
Cratonic Xenoliths
73
Ta
0.039
ppm
Pearson et al. 2004
Continental Intraplate Xenoliths
73
Ta
0.04
ppm
Pearson et al. 2004
Ionov 1996
Protolith Gabbros at ODP Site 735
73
Ta
0.04
8
ppm
Hart et al. 1999
Silicate Earth
73
Ta
0.04
ppm
McDonough et al. 1992
Taylor & McLennan 1985
Tongan Basalts
73
Ta
0.04
5
ppm
Kelemen et al. 2004
Continental Intraplate Xenoliths
73
Ta
0.041
ppm
Pearson et al. 2004
Eggins et al. 1998
Silicate Earth
73
Ta
0.041
ppm
McDonough et al. 1992
Sun 1982
Sun & McDonough 1989
McDonough & Frey 1989
Komatiites
73
Ta
0.05
ppm
Condie 1993
Nanno Ooze
73
Ta
0.05
2
ppm
Plank & Langmuir 1998
Talkeetna Arc Plutonic Rocks
73
Ta
0.05
0.012
6
ppm
Kelemen et al. 2004
Pelagic Clay
73
Ta
0.053
3
ppm
Plank & Langmuir 1998
Carbonate
73
Ta
0.056
13
ppm
Plank & Langmuir 1998
Continental Intraplate Xenoliths
73
Ta
0.058
ppm
Pearson et al. 2004
Eggins et al. 1998
Cratonic Xenoliths
73
Ta
0.06
ppm
Pearson et al. 2004
Gregoire et al. 2002
Cratonic Xenoliths
73
Ta
0.06
ppm
Pearson et al. 2004
Gregoire et al. 2002
Interlayerd Clay & Chert
73
Ta
0.07
2
ppm
Plank & Langmuir 1998
Cratonic Xenoliths
73
Ta
0.071
ppm
Pearson et al. 2004
Island Arc Andesite
73
Ta
0.08
4
ppm
Kelemen et al. 2004
Continental Intraplate Xenoliths
73
Ta
0.083
ppm
Pearson et al. 2004
Johnson et al. 1996
ODP/DSDP Site 417/418
73
Ta
0.097
ppm
Staudigel et al. 1996
Talkeetna Arc Plutonic Rocks
73
Ta
0.116
0.036
7
ppm
Kelemen et al. 2004
Volcanoclastic Sediment
73
Ta
0.119
15
ppm
Plank & Langmuir 1998
Continental Intraplate Xenoliths
73
Ta
0.12
ppm
Pearson et al. 2004
Bedini & Bodinier 1999
Central America Trench
73
Ta
0.127
ppm
Plank & Langmuir 1998
Boninites
73
Ta
0.13
22
ppm
Kelemen et al. 2004
Kamchatka Basalt
73
Ta
0.13
22
ppm
Kelemen et al. 2004
N-MORB
73
Ta
0.13
ppm
Klein 2004
Lehnert 2000
Kamchatka Trench
73
Ta
0.133
ppm
Plank & Langmuir 1998
Nano Ooze
73
Ta
0.135
4
ppm
Plank & Langmuir 1998
Vanuatu Trench
73
Ta
0.136
ppm
Plank & Langmuir 1998
Carbonates
73
Ta
0.14
50
ppm
Gao et al. 1998
Marianas Basalt
73
Ta
0.14
12
ppm
Kelemen et al. 2004
Colombia Trench
73
Ta
0.146
ppm
Plank & Langmuir 1998
Talkeetna Arc Plutonic Rocks
73
Ta
0.147
0.003
42
ppm
Kelemen et al. 2004
Hydrothermal Sediment
73
Ta
0.155
4
ppm
Plank & Langmuir 1998
Luzon Basalt
73
Ta
0.16
5
ppm
Kelemen et al. 2004
New Hebrides Islands
73
Ta
0.16
6
ppm
Kelemen et al. 2004
Silicified Limestone
73
Ta
0.17
ppm
Plank & Langmuir 1998
Talkeetna Arc Plutonic Rocks
73
Ta
0.174
0.009
13
ppm
Kelemen et al. 2004
Chert
73
Ta
0.182
4
ppm
Plank & Langmuir 1998
Interlayered Chert & Limestone
73
Ta
0.187
5
ppm
Plank & Langmuir 1998
Oceanic Plateaus
73
Ta
0.19
ppm
Kerr 2004
Salters et al. 1992
N-MORB
73
Ta
0.192
0.106
26
ppm
Hofmann 1988
Jochum et al. 1988
Oceanic Plateaus
73
Ta
0.2
ppm
Kerr 2004
Mahoney et al. 1993
N-MORB
73
Ta
0.203
ppm
Klein 2004
Niu et al. 1999
Continental Intraplate Xenoliths
73
Ta
0.215
ppm
Pearson et al. 2004
Eggins et al. 1998
Basalts
73
Ta
0.23
ppm
Condie 1993
Oceanic Plateaus
73
Ta
0.23
ppm
Kerr 2004
Hauff et al. 2000
Izu-Bonin Trench
73
Ta
0.239
ppm
Plank & Langmuir 1998
Basalts
73
Ta
0.24
ppm
Condie 1993
Island Arc Andesite
73
Ta
0.24
64
ppm
Kelemen et al. 2004
Sandstones
73
Ta
0.24
ppm
Condie 1993
Aleutian Basalts
73
Ta
0.25
12
ppm
Kelemen et al. 2004
Andesites
73
Ta
0.25
20
ppm
Kelemen et al. 2004
Basalts
73
Ta
0.25
ppm
Condie 1993
Basalts
73
Ta
0.25
ppm
Condie 1993
Oceanic Plateaus
73
Ta
0.25
ppm
Kerr 2004
Tejada et al. 2002
Kermadec Basalts
73
Ta
0.26
10
ppm
Kelemen et al. 2004
Lesser Antilles Basalt
73
Ta
0.26
11
ppm
Kelemen et al. 2004
Peru Trench
73
Ta
0.261
ppm
Plank & Langmuir 1998
Basalts
73
Ta
0.27
ppm
Condie 1993
Radiolarites
73
Ta
0.285
4
ppm
Plank & Langmuir 1998
Philip Trench
73
Ta
0.287
ppm
Plank & Langmuir 1998
Central American Basalts
73
Ta
0.29
17
ppm
Kelemen et al. 2004
Peninsular Range Batholith
73
Ta
0.29
ppm
Kemp & Hawkesworth 2004
Sylvester 1995
Radiolarites
73
Ta
0.29
ppm
Elliot et al. 1997
Andesites
73
Ta
0.292
50
ppm
Plank & Langmuir 1998
Plank & Langmuir 1988
Ashy Clay
73
Ta
0.299
4
ppm
Plank & Langmuir 1998
Basalts
73
Ta
0.3
7
ppm
Farmer 2004
Conticelli et al. 1997
Basalts
73
Ta
0.3
ppm
Condie 1993
Basalts
73
Ta
0.3
ppm
Condie 1993
Lower Continental Crust
73
Ta
0.3
µg/g
Rudnick & Gao 2004
Liu et al. 2001
Mafic Archean Granulites
73
Ta
0.3
0.2
8
ppm
Rudnick & Fountain 1995
Oceanic Plateaus
73
Ta
0.3
ppm
Kerr 2004
Kerr et al. 1997
Hauff et al. 2000
Sandstones
73
Ta
0.3
ppm
Condie 1993
N-MORB
73
Ta
0.309
ppm
Klein 2004
Thompson et al. 1980
Fresh Mid-Ocean Ridge Basalts
73
Ta
0.31
28
ppm
Kelemen et al. 2004
Sandstones
73
Ta
0.31
ppm
Condie 1993
Japan Trench
73
Ta
0.319
ppm
Plank & Langmuir 1998
Kuriles Trench
73
Ta
0.319
ppm
Plank & Langmuir 1998
Diatom Oozes & Clay
73
Ta
0.321
15
ppm
Plank & Langmuir 1998
South Sandwich Trench
73
Ta
0.321
ppm
Plank & Langmuir 1998
Radiolarites
73
Ta
0.33
17
ppm
Plank & Langmuir 1998
Oceanic Plateaus
73
Ta
0.34
ppm
Kerr 2004
Mahoney et al. 1993
Andesites
73
Ta
0.35
ppm
Condie 1993
Oceanic Plateaus
73
Ta
0.35
ppm
Kerr 2004
Tejada et al. 2002
Diatome Mud
73
Ta
0.354
6
ppm
Plank & Langmuir 1998
Continental Intraplate Xenoliths
73
Ta
0.37
ppm
Pearson et al. 2004
Ionov et al. 1997
Phanerozoic Flood Basalts
73
Ta
0.37
1
ppm
Farmer 2004
Peate 1997
Transitional Mid-Ocean Ridge Basalts
73
Ta
0.38
ppm
Klein 2004
Lehnert 2000
Tonalites-Trondhjemites-Granodiorites
73
Ta
0.39
553
ppm
Gao et al. 1998
Diatome Ooze
73
Ta
0.391
4
ppm
Plank & Langmuir 1998
Andesites
73
Ta
0.4
ppm
Condie 1993
Carbonates
73
Ta
0.4
2038
ppm
Gao et al. 1998
Felsic Granulites
73
Ta
0.4
137
ppm
Gao et al. 1998
Intermediate Granulites
73
Ta
0.4
136
ppm
Gao et al. 1998
Oceanic Plateaus
73
Ta
0.4
ppm
Kerr 2004
Salters et al. 1992
Spinel Peridotites
73
Ta
0.4
0.23
0.51
38
ppm
McDonough 1990
Chert
73
Ta
0.406
4
ppm
Plank & Langmuir 1998
Amphibolites
73
Ta
0.41
189
ppm
Gao et al. 1998
Carbonate Turbidites
73
Ta
0.41
87
ppm
Plank & Langmuir 1998
Chert
73
Ta
0.41
ppm
Elliot et al. 1997
Diatome Clay
73
Ta
0.42
6
ppm
Plank & Langmuir 1998
Interior North China Craton
73
Ta
0.42
ppm
Gao et al. 1998
Basalts
73
Ta
0.45
12
ppm
Farmer 2004
Dungan et al. 1986
Continental Arc Andesite
73
Ta
0.45
83
ppm
Kelemen et al. 2004
Granites
73
Ta
0.45
8
ppm
Kemp & Hawkesworth 2004
Kemp 2001
Oceanic Plateaus
73
Ta
0.46
ppm
Kerr 2004
Salters et al. 1992
Phanerozoic Flood Basalts
73
Ta
0.47
7
ppm
Farmer 2004
Wooden et al. 1993
Cascade Basalt
73
Ta
0.48
17
ppm
Kelemen et al. 2004
Oceanic Plateaus
73
Ta
0.48
ppm
Kerr 2004
Kerr et al. 1997
Hauff et al. 2000
Phanerozoic Flood Basalts
73
Ta
0.48
9
ppm
Farmer 2004
Wooden et al. 1993
Interlayered Clay & Chert
73
Ta
0.483
12
ppm
Plank & Langmuir 1998
Interior North China Craton
73
Ta
0.49
ppm
Gao et al. 1998
Andesites
73
Ta
0.5
ppm
Condie 1993
Andesites
73
Ta
0.5
ppm
Condie 1993
Andesites
73
Ta
0.5
ppm
Condie 1993
Andesites
73
Ta
0.5
ppm
Condie 1993
Lower Continental Crust
73
Ta
0.5
µg/g
Rudnick & Gao 2004
Rudnick & Presper 1990
Lower Continental Crust
73
Ta
0.5
µg/g
Rudnick & Gao 2004
Condie & Selverstone 1999
Phanerozoic Flood Basalts
73
Ta
0.5
1
ppm
Farmer 2004
Peate 1997
Scotia Island Basalt
73
Ta
0.5
11
ppm
Kelemen et al. 2004
Turbidites
73
Ta
0.5
4
ppm
Plank & Langmuir 1998
South Margin of North China Craton
73
Ta
0.51
ppm
Gao et al. 1998
Central East China Craton
73
Ta
0.52
ppm
Gao et al. 1998
Granulites
73
Ta
0.52
0.25
50
ppm
Rudnick & Presper 1990
Alaska Trench
73
Ta
0.522
ppm
Plank & Langmuir 1998
Brown Clay
73
Ta
0.527
4
ppm
Plank & Langmuir 1998
Andesites
73
Ta
0.53
ppm
Condie 1993
Central East China Craton
73
Ta
0.53
ppm
Gao et al. 1998
Oceanic Plateaus
73
Ta
0.54
ppm
Kerr 2004
Mahoney et al. 1995
Aleutian Trench
73
Ta
0.545
ppm
Plank & Langmuir 1998
Central East China Craton
73
Ta
0.55
ppm
Gao et al. 1998
Central East China Craton
73
Ta
0.55
ppm
Gao et al. 1998
Mafic Granulitic Xenolites
73
Ta
0.55
0.5
18
ppm
Rudnick & Fountain 1995
Middle Continental Crust
73
Ta
0.55
µg/g
Rudnick & Gao 2004
Gao et al. 1998
Tonga Trench
73
Ta
0.552
ppm
Plank & Langmuir 1998
Interior North China Craton
73
Ta
0.56
ppm
Gao et al. 1998
Metafelsic Volcanics
73
Ta
0.56
41
ppm
Gao et al. 1998
South Margin of North China Craton
73
Ta
0.57
ppm
Gao et al. 1998
Yangtze Craton
73
Ta
0.57
ppm
Gao et al. 1998
Central East China Craton
73
Ta
0.58
ppm
Gao et al. 1998
Felsic Archean Granulites
73
Ta
0.58
0.35
34
ppm
Rudnick & Fountain 1995
Oceanic Plateaus
73
Ta
0.58
ppm
Kerr 2004
Reynaud et al. 1999
Yangtze Craton
73
Ta
0.59
ppm
Gao et al. 1998
Archean Terrains
73
Ta
0.6
ppm
Rudnick & Fountain 1995
Central East China Craton
73
Ta
0.6
ppm
Gao et al. 1998
Continental Arcs
73
Ta
0.6
ppm
Rudnick & Fountain 1995
Continental Crust
73
Ta
0.6
µg/g
Rudnick & Gao 2004
Gao et al. 1998a
Continental Shields & Platforms
73
Ta
0.6
ppm
Rudnick & Fountain 1995
Granulitic Xenolites
73
Ta
0.6
14
ppm
Rudnick & Presper 1990
Intermediate Mafic Granulitic Xenolites
73
Ta
0.6
1
ppm
Rudnick & Fountain 1995
Lower Continental Crust
73
Ta
0.6
µg/g
Rudnick & Gao 2004
Gao et al. 1998a
Lower Continental Crust
73
Ta
0.6
ppm
Kemp & Hawkesworth 2004
Rudnick & Gao 2004
Lower Continental Crust
73
Ta
0.6
µg/g
Rudnick & Gao 2004
Rudnick & Fountain 1995
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
0.6
µg/g
Rudnick & Gao 2004
Rudnick & Fountain 1995
Mafic Post-Archean Granulites
73
Ta
0.6
0.2
12
ppm
Rudnick & Fountain 1995
Middle Continental Crust
73
Ta
0.6
0.04
µg/g
Rudnick & Gao 2004
Middle Continental Crust
73
Ta
0.6
µg/g
Rudnick & Gao 2004
Rudnick & Fountain 1995
Middle Continental Crust
73
Ta
0.6
ppm
Kemp & Hawkesworth 2004
Rudnick & Gao 2004
Middle Continental Crust
73
Ta
0.6
ppm
Rudnick & Fountain 1995
Rifted Continental Margins
73
Ta
0.6
ppm
Rudnick & Fountain 1995
East China Craton
73
Ta
0.61
ppm
Gao et al. 1998
Interior North China Craton
73
Ta
0.61
ppm
Gao et al. 1998
Basalts
73
Ta
0.62
27
ppm
Farmer 2004
Farmer et al. 2002
Central East China Craton
73
Ta
0.62
ppm
Gao et al. 1998
Intermediate Mafic Archean Granulites
73
Ta
0.62
0.63
5
ppm
Rudnick & Fountain 1995
Brown Clay
73
Ta
0.628
29
ppm
Plank & Langmuir 1998
Central East China Craton
73
Ta
0.63
ppm
Gao et al. 1998
Central East China Craton
73
Ta
0.63
ppm
Gao et al. 1998
East China Craton
73
Ta
0.63
ppm
Gao et al. 1998
South Margin of North China Craton
73
Ta
0.63
ppm
Gao et al. 1998
Subducted Sediment
73
Ta
0.63
0.06
ppm
Plank & Langmuir 1998
Green Clay
73
Ta
0.634
3
ppm
Plank & Langmuir 1998
Yangtze Craton
73
Ta
0.64
ppm
Gao et al. 1998
DSDP/ODP Site 800
73
Ta
0.647
ppm
Plank & Langmuir 1998
Mafic Granulites
73
Ta
0.65
128
ppm
Gao et al. 1998
Radiolarian Clay
73
Ta
0.65
2
ppm
Plank & Langmuir 1998
Tonalites-Trondhjemites-Granodiorites
73
Ta
0.65
ppm
Condie 1993
North Qinling Belt in China
73
Ta
0.66
ppm
Gao et al. 1998
South Qinling Belt in China
73
Ta
0.66
ppm
Gao et al. 1998
Mexico Trench
73
Ta
0.675
ppm
Plank & Langmuir 1998
Central East China Craton
73
Ta
0.68
ppm
Gao et al. 1998
Interior North China Craton
73
Ta
0.68
ppm
Gao et al. 1998
Yangtze Craton
73
Ta
0.68
ppm
Gao et al. 1998
Early Archean Upper Crust
73
Ta
0.69
ppm
Condie 1993
Late Archean Upper Crust
73
Ta
0.69
ppm
Condie 1993
Late Archean Upper Crust
73
Ta
0.69
ppm
Condie 1993
East Sunda Trench
73
Ta
0.693
ppm
Plank & Langmuir 1998
Active Continental Rifts
73
Ta
0.7
ppm
Rudnick & Fountain 1995
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
Rudnick & Fountain 1995
Continental Crust
73
Ta
0.7
µg/g
Rudnick & Gao 2004
Continental Crust
73
Ta
0.7
ppm
Kemp & Hawkesworth 2004
Rudnick & Gao 2004
Continental Crust
73
Ta
0.7
ppm
Plank & Langmuir 1998
Early Archean Upper Crust
73
Ta
0.7
ppm
Condie 1993
Granites
73
Ta
0.7
402
ppm
Gao et al. 1998
Graywackes
73
Ta
0.7
ppm
Condie 1993
Lower Continental Crust
73
Ta
0.7
µg/g
Rudnick & Gao 2004
Taylor & McLennan 1985
Taylor & McLennan 1995
Paleozoic Orogens
73
Ta
0.7
ppm
Rudnick & Fountain 1995
Tonalites-Trondhjemites-Granodiorites
73
Ta
0.7
ppm
Condie 1993
Silty Mud
73
Ta
0.703
16
ppm
Plank & Langmuir 1998
Cascadia Trench
73
Ta
0.704
ppm
Plank & Langmuir 1998
Clastic Turbidites
73
Ta
0.704
28
ppm
Plank & Langmuir 1998
Tonalites-Trondhjemites-Granodiorites
73
Ta
0.71
355
ppm
Kemp & Hawkesworth 2004
Martin 1995
Andaman Trench
73
Ta
0.714
ppm
Plank & Langmuir 1998
Mafic Intrusions
73
Ta
0.72
308
ppm
Gao et al. 1998
South Qinling Belt in China
73
Ta
0.72
ppm
Gao et al. 1998
South Margin of North China Craton
73
Ta
0.73
ppm
Gao et al. 1998
Yangtze Craton
73
Ta
0.73
ppm
Gao et al. 1998
Pelagic Clay
73
Ta
0.739
56
ppm
Plank & Langmuir 1998
Pelagic Clay
73
Ta
0.739
56
ppm
Plank & Langmuir 1998
Central East China Craton
73
Ta
0.74
ppm
Gao et al. 1998
Upper Continental Crust
73
Ta
0.74
µg/g
Rudnick & Gao 2004
Gao et al. 1998
Marianas Trench
73
Ta
0.758
ppm
Plank & Langmuir 1998
Graywackes
73
Ta
0.76
ppm
Condie 1993
E-MORB
73
Ta
0.77
ppm
Klein 2004
Lehnert 2000
South Margin of North China Craton
73
Ta
0.78
ppm
Gao et al. 1998
South Qinling Belt in China
73
Ta
0.78
ppm
Gao et al. 1998
Upper Continental Crust
73
Ta
0.79
ppm
Condie 1993
Upper Continental Crust
73
Ta
0.79
µg/g
Rudnick & Gao 2004
Condie 1993
Turbidites
73
Ta
0.797
4
ppm
Plank & Langmuir 1998
Continental Crust
73
Ta
0.8
µg/g
Rudnick & Gao 2004
Taylor & McLennan 1985
Taylor & McLennan 1995
Felsic Post-Archean Granulites
73
Ta
0.8
0.5
1
ppm
Rudnick & Fountain 1995
Felsic Volcanics
73
Ta
0.8
ppm
Condie 1993
Graywackes
73
Ta
0.8
ppm
Condie 1993
Graywackes
73
Ta
0.8
ppm
Condie 1993
Lower Continental Crust
73
Ta
0.8
µg/g
Rudnick & Gao 2004
Wedepohl 1995
Marine Shales
73
Ta
0.8
ppm
Li 1991
Turekian & Wedepohl 1961
Mesozoic & Cenozoic Extensions
73
Ta
0.8
ppm
Rudnick & Fountain 1995
Mesozoic & Cenozoic Orogens
73
Ta
0.8
ppm
Rudnick & Fountain 1995
Phanerozoic Flood Basalts
73
Ta
0.8
6
ppm
Farmer 2004
Lightfoot et al. 1990
Tonalites-Trondhjemites-Granodiorites
73
Ta
0.8
ppm
Condie 1993
Sumatra Trench
73
Ta
0.803
ppm
Plank & Langmuir 1998
Arenaceous Rocks
73
Ta
0.81
121
ppm
Gao et al. 1998
Pelagic Clay
73
Ta
0.81
ppm
Elliot et al. 1997
Pelagic Clay
73
Ta
0.81
6
ppm
Plank & Langmuir 1998
Upper Continental Crust
73
Ta
0.82
ppm
Condie 1993
Ryuku Trench
73
Ta
0.831
ppm
Plank & Langmuir 1998
Pelagic Clay
73
Ta
0.833
6
ppm
Plank & Langmuir 1998
Lower Continental Crust
73
Ta
0.84
ppm
Wedepohl 1995
Shales
73
Ta
0.84
ppm
Condie 1993
South Qinling Belt in China
73
Ta
0.84
ppm
Gao et al. 1998
Java Trench
73
Ta
0.848
ppm
Plank & Langmuir 1998
Continental Arc Andesite
73
Ta
0.85
22
ppm
Kelemen et al. 2004
Graywackes
73
Ta
0.85
ppm
Condie 1993
Middle Proterozoic Upper Crust
73
Ta
0.86
ppm
Condie 1993
Metalliferous Clay
73
Ta
0.867
12
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
Arenaceous Rocks
73
Ta
0.88
2754
ppm
Gao et al. 1998
Australian Granite
73
Ta
0.88
8
ppm
Kemp & Hawkesworth 2004
Whalen 1985
Basalts
73
Ta
0.88
10
ppm
Farmer 2004
Chung et al. 2001
Early Proterozoic Upper Crust
73
Ta
0.88
ppm
Condie 1993
Felsic Volcanics
73
Ta
0.88
972
ppm
Gao et al. 1998
Radiolarian Clay
73
Ta
0.89
8
ppm
Plank & Langmuir 1998
Radiolarian Clay
73
Ta
0.89
8
ppm
Plank & Langmuir 1998
Graywackes
73
Ta
0.9
ppm
Condie 1993
Late Proterozoic Upper Crust
73
Ta
0.9
ppm
Condie 1993
Mesozoic & Cenozoic Upper Crust
73
Ta
0.9
ppm
Condie 1993
Paleozoic Orogens
73
Ta
0.9
ppm
Rudnick & Fountain 1995
Paleozoic Upper Crust
73
Ta
0.9
ppm
Condie 1993
Upper Continental Crust
73
Ta
0.9
µg/g
Rudnick & Gao 2004
Upper Continental Crust
73
Ta
0.9
0.1
µg/g
Rudnick & Gao 2004
see text
Upper Continental Crust
73
Ta
0.9
ppm
Kemp & Hawkesworth 2004
Rudnick & Gao 2004
Phanerozoic Flood Basalts
73
Ta
0.92
36
ppm
Farmer 2004
Hooper & Hawkesworth 1993
Makran Trench
73
Ta
0.925
ppm
Plank & Langmuir 1998
Granites
73
Ta
0.93
ppm
Kemp & Hawkesworth 2004
Sylvester 1995
Tonalites-Trondhjemites-Granodiorites
73
Ta
0.93
641
ppm
Gao et al. 1998
Middle Proterozoic Upper Crust
73
Ta
0.94
ppm
Condie 1993
Early Proterozoic Upper Crust
73
Ta
0.95
ppm
Condie 1993
Pelites
73
Ta
0.95
69
ppm
Gao et al. 1998
Mesozoic & Cenozoic Upper Crust
73
Ta
0.96
ppm
Condie 1993
Upper Continental Crust
73
Ta
0.96
0.12
ppm
Plank & Langmuir 1998
Upper Continental Crust
73
Ta
0.96
µg/g
Rudnick & Gao 2004
Plank & Langmuir 1998
Late Proterozoic Upper Crust
73
Ta
0.97
ppm
Condie 1993
Paleozoic Upper Crust
73
Ta
0.97
ppm
Condie 1993
Andes Basalt
73
Ta
0.99
20
ppm
Kelemen et al. 2004
Core
73
Ta
0
µg/g
McDonough 1998
Continental Crust
73
Ta
1
ppm
Taylor & McLennan 1995
Felsic Volcanics
73
Ta
1
ppm
Condie 1993
Granites
73
Ta
1
ppm
Condie 1993
Marine Pelagic Clay
73
Ta
1
ppm
Li 1991
Turekian & Wedepohl 1961
Marine Pelagic Clay
73
Ta
1
ppm
Li 1982
Turekian & Wedepohl 1961
Brewer 1975
North Qinling Belt in China
73
Ta
1
ppm
Gao et al. 1998
Upper Continental Crust
73
Ta
1
µg/g
Rudnick & Gao 2004
Taylor & McLennan 1985
Taylor & McLennan 1995
Nankai Trench
73
Ta
1.008
ppm
Plank & Langmuir 1998
Pelagic Clay
73
Ta
1.008
55
ppm
Plank & Langmuir 1998
Mavic Volcanics
73
Ta
1.04
632
ppm
Gao et al. 1998
Pelagic Clay
73
Ta
1.056
8
ppm
Plank & Langmuir 1998
Congo River Particulates
73
Ta
1.1
µg/g
Martin & Meybeck 1979
Continental Arcs
73
Ta
1.1
ppm
Rudnick & Fountain 1995
Continental Crust
73
Ta
1.1
ppm
Wedepohl 1995
Continental Crust
73
Ta
1.1
ppm
Rudnick & Fountain 1995
Continental Crust
73
Ta
1.1
µg/g
Rudnick & Gao 2004
Wedepohl 1995
Continental Crust
73
Ta
1.1
ppm
Rudnick & Fountain 1995
Wedepohl 1995
Continental Shields & Platforms
73
Ta
1.1
ppm
Rudnick & Fountain 1995
North American Shale Composite (NASC)
73
Ta
1.1
ppm
Condie 1993
Parana River Particulates
73
Ta
1.1
µg/g
Martin & Meybeck 1979
Rifted Continental Margins
73
Ta
1.1
ppm
Rudnick & Fountain 1995
Tonalites
73
Ta
1.1
ppm
Wedepohl 1995
North Antilles Trench
73
Ta
1.118
ppm
Plank & Langmuir 1998
North Qinling Belt in China
73
Ta
1.15
ppm
Gao et al. 1998
Pelites
73
Ta
1.18
1341
ppm
Gao et al. 1998
Felsic Volcanics
73
Ta
1.2
ppm
Condie 1993
Mesozoic & Cenozoic Extensions
73
Ta
1.2
ppm
Rudnick & Fountain 1995
Mesozoic & Cenozoic Orogens
73
Ta
1.2
ppm
Rudnick & Fountain 1995
North Qinling Belt in China
73
Ta
1.2
ppm
Gao et al. 1998
Volcanoclastic Turbidites
73
Ta
1.226
43
ppm
Plank & Langmuir 1998
Basalts
73
Ta
1.24
13
ppm
Farmer 2004
Robert et al. 1992
Ganges River Particulates
73
Ta
1.25
µg/g
Martin & Meybeck 1979
River Particulates
73
Ta
1.25
µg/g
Martin & Meybeck 1979
Active Continental Rifts
73
Ta
1.3
ppm
Rudnick & Fountain 1995
Felsic Volcanics
73
Ta
1.3
ppm
Condie 1993
Lower Continental Crust
73
Ta
1.3
µg/g
Rudnick & Gao 2004
Shaw et al. 1994
Metapelitic Granulitic Xenolites
73
Ta
1.3
1
15
ppm
Rudnick & Fountain 1995
Phanerozoic Flood Basalts
73
Ta
1.3
18
ppm
Farmer 2004
Lightfoot et al. 1990
South Antilles Trench
73
Ta
1.3
ppm
Plank & Langmuir 1998
North Qinling Belt in China
73
Ta
1.31
ppm
Gao et al. 1998
Continental Intraplate Xenoliths
73
Ta
1.33
ppm
Pearson et al. 2004
Glaser et al. 1999
Mekong River Particulates
73
Ta
1.35
µg/g
Martin & Meybeck 1979
Felsic Volcanics
73
Ta
1.4
ppm
Condie 1993
Intermediate Mafic Post-Archean Granulites
73
Ta
1.4
1.4
4
ppm
Rudnick & Fountain 1995
Shales
73
Ta
1.4
ppm
Condie 1993
Shales
73
Ta
1.4
ppm
Condie 1993
Diorite
73
Ta
1.46
260
ppm
Gao et al. 1998
Granites
73
Ta
1.5
ppm
Condie 1993
Upper Continental Crust
73
Ta
1.5
ppm
Wedepohl 1995
Upper Continental Crust
73
Ta
1.5
µg/g
Rudnick & Gao 2004
Wedepohl 1995
Granulites
73
Ta
1.55
16
ppm
Rudnick & Presper 1990
Basic Precambrian Granulites
73
Ta
1.6
25
ppm
Shaw et al. 1986
Felsic Volcanics
73
Ta
1.6
ppm
Condie 1993
Intermediate Precambrian Granulites
73
Ta
1.6
26
ppm
Shaw et al. 1986
Volcanoclastic Turbidites
73
Ta
1.66
ppm
Elliot et al. 1997
Volcanoclastic Turbidites
73
Ta
1.663
13
ppm
Plank & Langmuir 1998
Felsic Volcanics
73
Ta
1.7
ppm
Condie 1993
Granites
73
Ta
1.7
ppm
Condie 1993
Granites
73
Ta
1.8
1226
ppm
Gao et al. 1998
Middle Continental Crust
73
Ta
1.8
µg/g
Rudnick & Gao 2004
Shaw et al. 1994
Phanerozoic Flood Basalts
73
Ta
1.92
1
ppm
Farmer 2004
Peate 1997
EET 84302 Acapulcoite
73
Ta
10
ng/g
Mittlefehldt 2004
Weigel et al. 1999
Manganese Nodules
73
Ta
10
ppm
Li 1991
Baturin 1988
Kapoeta Howardites
73
Ta
100
ng/g
Mittlefehldt 2004
Wanke et al. 1972
Continental Crust
73
Ta
1000
ppb
Palme & O'Neill 2004
Rudnick & Gao 2004
Y-791491 Lodranite
73
Ta
11
ng/g
Mittlefehldt 2004
Weigel et al. 1999
Oceanic Plateaus
73
Ta
11.55
ppm
Kerr 2004
Kerr et al. 2002
Carbonate Turbidites
Nb/Ta
11.9
1.1
8
Plank & Langmuir 1998
Angrite LEW 87051
73
Ta
110
ng/g
Mittlefehldt 2004
Mittlefehldt & Lindstrom 1990
Malvern Howardites
73
Ta
110
ng/g
Mittlefehldt 2004
Palme et al. 1978
Early Archean Upper Crust
Nb/Ta
12
Condie 1993
Early Archean Upper Crust
Nb/Ta
12
Condie 1993
Late Archean Upper Crust
Nb/Ta
12
Condie 1993
Late Archean Upper Crust
Nb/Ta
12
Condie 1993
Upper Continental Crust
Nb/Ta
12
Condie 1993
Pelagic Clay
Nb/Ta
12.6
1.6
7
Plank & Langmuir 1998
Early Proterozoic Upper Crust
Nb/Ta
13
Condie 1993
Early Proterozoic Upper Crust
Nb/Ta
13
Condie 1993
Late Proterozoic Upper Crust
Nb/Ta
13
Condie 1993
Late Proterozoic Upper Crust
Nb/Ta
13
Condie 1993
Mesozoic & Cenozoic Upper Crust
Nb/Ta
13
Condie 1993
Mesozoic & Cenozoic Upper Crust
Nb/Ta
13
Condie 1993
Middle Proterozoic Upper Crust
Nb/Ta
13
Condie 1993
Middle Proterozoic Upper Crust
Nb/Ta
13
Condie 1993
Paleozoic Upper Crust
Nb/Ta
13
Condie 1993
Paleozoic Upper Crust
Nb/Ta
13
Condie 1993
Upper Continental Crust
Nb/Ta
13
Condie 1993
Terrigenous Sediments
Nb/Ta
13.5
2.4
15
Plank & Langmuir 1998
CI Chondrites
73
Ta
13.6
ppb
McDonough & Sun 1995
Depleted Mantle
73
Ta
13.8
4.554
ppb
Salters & Stracke 2004
CI Chondrites
73
Ta
14
ppb
McDonough & Sun 1995
Palme 1988
Gibson Lodranite
73
Ta
14
ng/g
Mittlefehldt 2004
Weigel et al. 1999
MAC 88177 Lodranite
73
Ta
14
ng/g
Mittlefehldt 2004
Weigel et al. 1999
Orgueil Chondrite
73
Ta
14
1
ppb
Anders & Grevesse 1989
CI Chondrites
73
Ta
14.2
0.26
2
ppb
Anders & Grevesse 1989
CI Chondrites
73
Ta
14.2
0.852
ppb
Palme & O'Neill 2004
Palme & Jones 2004
Subducted Sediment
Nb/Ta
14.2
1.8
50
Plank & Langmuir 1998
Central East China Craton
Nb/Ta
14.7
Gao et al. 1998
Fresh Mid-Ocean Ridge Basalts
Nb/Ta
14.73
Salters & Stracke 2004
Petersburg Eucrites
73
Ta
144
ng/g
Mittlefehldt 2004
Mason et al. 1979
Buchanan & Reid 1996
Sioux County Eucrite
73
Ta
147
ng/g
Mittlefehldt 2004
Barrat et al. 2000
McCarthy et al. 1973
Depleted D-MORB basalts
Nb/Ta
15.19
Salters & Stracke 2004
Red Clay
Nb/Ta
15.3
1
Plank & Langmuir 1998
Radiolarites
Nb/Ta
15.5
2.9
7
Plank & Langmuir 1998
Kimberlite
73
Ta
15.72
22
ppm
Farmer 2004
Taylor et al. 1994
Ibitira Eucrite
73
Ta
153
ng/g
Mittlefehldt 2004
Jarosewich 1990
Barrat et al. 2000
CI Chondrites
73
Ta
16
ppb
McDonough & Sun 1995
Wasson & Kallemeyn 1988
Antilles Trench
Nb/Ta
16.4
3
Plank & Langmuir 1998
Stolz et al. 1996
Central East China Craton
Nb/Ta
16.5
Gao et al. 1998
Central East China Craton
Nb/Ta
16.7
Gao et al. 1998
Orgueil Chondrite
73
Ta
17
1
ppb
Anders & Ebihara 1982
Spinel Peridotites
Nb/Ta
17
17
3
4
McDonough 1990
Central East China Craton
Nb/Ta
17.3
Gao et al. 1998
Central East China Craton
Nb/Ta
17.4
Gao et al. 1998
Central East China Craton
Nb/Ta
17.5
Gao et al. 1998
CI Chondrites
Nb/Ta
17.6
McDonough 1990
McDonough & Frey 1989
Sun & McDonough 1989
Sun 1982
Primitive Mantle
Nb/Ta
17.6
McDonough 1990
McDonough & Frey 1989
Sun & McDonough 1989
Sun 1982
Primitive Mantle
Nb/Ta
17.6
Gao et al. 1998
Hofmann 1988
Central East China Craton
Nb/Ta
17.9
Gao et al. 1998
Nuevo Laredo Eucrite
73
Ta
178
ng/g
Mittlefehldt 2004
Warren & Jerde 1987
Oceanic Plateaus
73
Ta
18.25
ppm
Kerr 2004
Aitken & Echeverria 1984
Dupre & Echeverria 1984
Jochum et al. 1991
Macibini Eucrites
73
Ta
180
ng/g
Mittlefehldt 2004
McCarthy et al. 1973
Buchanan et al. 2000b
Central East China Craton
Nb/Ta
19.5
Gao et al. 1998
Amazon River Particulates
73
Ta
2
µg/g
Martin & Meybeck 1979
Continental Crust
73
Ta
2
µg/g
Rudnick & Gao 2004
Taylor 1964
Lower Continental Crust
73
Ta
2
ppm
Shaw et al. 1986
Lower Continental Crust
73
Ta
2.1
µg/g
Rudnick & Gao 2004
Villaseca et al. 1999
Upper Continental Crust
73
Ta
2.2
ppm
Taylor & McLennan 1995
Precambrian Granulites
73
Ta
2.3
88
ppm
Shaw et al. 1986
Ultrabasic Precambrian Granulites
73
Ta
2.4
14
ppm
Shaw et al. 1986
Basalts
73
Ta
2.48
6
ppm
Farmer 2004
Turner et al. 1996a
Basalts
73
Ta
2.64
9
ppm
Farmer 2004
Hoang & Flower 1998
Continental Crust
Be/Ta
2.7
Salters & Stracke 2004
Continental Intraplate Xenoliths
73
Ta
2.79
ppm
Pearson et al. 2004
Gregoire et al. 2002
Australian Granite
73
Ta
2.9
ppm
Kemp & Hawkesworth 2004
Collins et al. 1982
Silicic Precambrian Granulites
73
Ta
2.9
23
ppm
Shaw et al. 1986
Chassigny Meteorite
73
Ta
20
ppb
McSween, Jr. 2004
Lodders 1998
D'Orbigny Angrite
73
Ta
200
ng/g
Mittlefehldt 2004
Mittlefehldt et al. 2002
Binda Eucrite
73
Ta
21
ng/g
Mittlefehldt 2004
Barrat et al. 2000
McCarthy et al. 1973
Pelagic Clay
Nb/Ta
21.8
4.3
9
Plank & Langmuir 1998
Oceanic Plateaus
73
Ta
21.96
ppm
Kerr 2004
Oceanic Plateaus
73
Ta
22.86
ppm
Kerr 2004
Kerr et al. 1996
QUE 94201 Meteorite
73
Ta
23
ppb
McSween, Jr. 2004
Lodders 1998
Shergotty Meteorite
73
Ta
250
40
ppb
McSween, Jr. 2004
Lodders 1998
Mesozoic & Cenozoic Upper Crust
La/Ta
28
Condie 1993
Mesozoic & Cenozoic Upper Crust
La/Ta
28
Condie 1993
Paleozoic Upper Crust
La/Ta
28
Condie 1993
Paleozoic Upper Crust
La/Ta
28
Condie 1993
Basalts
73
Ta
3.77
8
ppm
Farmer 2004
Zhang & O'Reilly 1997
Moore County Eucrite
73
Ta
30
ng/g
Mittlefehldt 2004
Barrat et al. 2000
McCarthy et al. 1973
Y-74450 Eucrites
73
Ta
300
ng/g
Mittlefehldt 2004
Wanke et al. 1977
Serra De Mage Eucrite
73
Ta
31
ng/g
Mittlefehldt 2004
Barrat et al. 2000
McCarthy et al. 1973
ALH 84001 Meteorite
73
Ta
32
ppb
McSween, Jr. 2004
Lodders 1998
Late Proterozoic Upper Crust
La/Ta
32
Condie 1993
Late Proterozoic Upper Crust
La/Ta
32
Condie 1993
Middle Proterozoic Upper Crust
La/Ta
32
Condie 1993
ALH 77005 Meteorite
73
Ta
33
7
ppb
McSween, Jr. 2004
Lodders 1998
Early Proterozoic Upper Crust
La/Ta
33
Condie 1993
Early Proterozoic Upper Crust
La/Ta
33
Condie 1993
Middle Proterozoic Upper Crust
La/Ta
33
Condie 1993
Upper Continental Crust
La/Ta
35
Condie 1993
Angrite Angra Dos Reis
73
Ta
350
ng/g
Mittlefehldt 2004
Mittlefehldt & Lindstrom 1990
Upper Continental Crust
La/Ta
36
Condie 1993
Stannern Eucrite
73
Ta
368
ng/g
Mittlefehldt 2004
Barrat et al. 2000
McCarthy et al. 1973
Primitive Mantle
73
Ta
37
5.6
ppb
McDonough & Sun 1995
Silicate Earth
73
Ta
37
5.6
ppb
McDonough & Sun 1995
Basalts
73
Ta
4
3
ppm
Farmer 2004
Chung et al. 1995
Continental Crust
73
Ta
4
ppm
Shaw et al. 1986
Continental Crust
73
Ta
4
µg/g
Rudnick & Gao 2004
Shaw et al. 1986
Basalts
73
Ta
4.19
4
ppm
Farmer 2004
Chung 1999
Cratonic Xenoliths
73
Ta
40
ppm
Pearson et al. 2004
Gregoire et al. 2002
Frankfort Howardites
73
Ta
40
ng/g
Mittlefehldt 2004
McCarthy et al. 1972
Palme et al. 1978
Primitive Mantle
73
Ta
40
ppb
Palme & O'Neill 2004
Primitive Mantle
73
Ta
40
4
ppb
Palme & O'Neill 2004
Early Archean Upper Crust
La/Ta
41
Condie 1993
Early Archean Upper Crust
La/Ta
42
Condie 1993
Late Archean Upper Crust
La/Ta
42
Condie 1993
Late Archean Upper Crust
La/Ta
43
Condie 1993
Cratonic Xenoliths
73
Ta
46
ppm
Pearson et al. 2004
Gregoire et al. 2002
Oceanic Plateaus
73
Ta
5.51
ppm
Kerr 2004
Mahoney et al. 1995
Precambrian Canadian Shield
73
Ta
5.7
ppm
Shaw et al. 1986
Upper Continental Crust
73
Ta
5.7
µg/g
Rudnick & Gao 2004
Shaw et al. 1967
Shaw et al. 1976
Oceanic Plateaus
73
Ta
5.78
ppm
Kerr 2004
Kerr et al. 1997
Hauff et al. 2000
ALHA77081 Acapulcoite
73
Ta
50
ng/g
Mittlefehldt 2004
Schultz et al. 1982
Chaunskij Mesosiderite
73
Ta
52
ng/g
Mittlefehldt 2004
Mittlefehldt in press
Petaev et al. 2000
Barea Mesosiderite
73
Ta
54
ng/g
Mittlefehldt 2004
Mason & Jarosewich 1973
Mittlefehldt in press
Continental Intraplate Xenoliths
73
Ta
6.65
ppm
Pearson et al. 2004
Ionov et al. 1997
Oceanic Plateaus
73
Ta
6.74
ppm
Kerr 2004
Mahoney et al. 1993
Oceanic Plateaus
73
Ta
6.77
ppm
Kerr 2004
Kerr et al. 1997
Hauff et al. 2000
Kerm Trench
73
Ta
651
ppm
Plank & Langmuir 1998
Estherville Mesosiderite
73
Ta
69
ng/g
Mittlefehldt 2004
Mittlefehldt in press
Simpson & Ahrens 1977
Oceanic Plateaus
73
Ta
7.22
ppm
Kerr 2004
Salters et al. 1992
Oceanic Plateaus
73
Ta
7.3
ppm
Kerr 2004
Tejada et al. 2002
Basalts
73
Ta
7.36
16
ppm
Farmer 2004
Rogers et al. 1998
Oceanic Plateaus
73
Ta
7.43
ppm
Kerr 2004
Mahoney et al. 1993
Oceanic Plateaus
73
Ta
7.45
ppm
Kerr 2004
Tejada et al. 2002
Oceanic Plateaus
73
Ta
7.47
ppm
Kerr 2004
Salters et al. 1992
Oceanic Plateaus
73
Ta
7.54
ppm
Kerr 2004
Salters et al. 1992
Oceanic Plateaus
73
Ta
8.03
ppm
Kerr 2004
Tejada et al. 1996
Oceanic Plateaus
73
Ta
8.36
ppm
Kerr 2004
Salters et al. 1992
Orangeite
73
Ta
8.5
114
ppm
Farmer 2004
Mitchell 1995
Oceanic Plateaus
73
Ta
8.58
ppm
Kerr 2004
Hauff et al. 2000
Oceanic Plateaus
73
Ta
8.6
ppm
Kerr 2004
Kerr et al. 1996
Oceanic Plateaus
73
Ta
8.65
ppm
Kerr 2004
Aitken & Echeverria 1984
Dupre & Echeverria 1984
Jochum et al. 1991
Watson IIE Iron
73
Ta
8.9
ng/g
Mittlefehldt 2004
Olsen et al. 1994
Oceanic Plateaus
73
Ta
8.96
ppm
Kerr 2004
Reynaud et al. 1999
Oceanic Plateaus
73
Ta
9.08
ppm
Kerr 2004
Salters et al. 1992
Cratonic Xenoliths
73
Ta
90
ppm
Pearson et al. 2004
Gregoire et al. 2002
Nakhla Meteorite
73
Ta
90
ppb
McSween, Jr. 2004
Lodders 1998
Oceans Surface water
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
Seawater
73
Ta
14
Bruland 1983
Seawater
73
Ta
2.5
ng/kg
Quinby-Hunt & Turekian 1983
Schutz & Turekian 1965
Seawater
73
Ta
1.4e-05
Broeker & Peng 1982