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

	GERM Database Search Results   Save as ... ================== Excel spreadsheet Tab delimited text file   Sort by ... =========== 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) Seawater 24 Cr 0.004             Broeker & Peng 1982 CM Chondrites 24 Cr 0.01             Bradley 2004 McSween & Richardson 1977 L Ordinary Chondrites 24 Cr 0.011             Bradley 2004 Jarosewich 1990 CI Chondrites 24 Cr 0.012             Bradley 2004 McSween & Richardson 1977 CM Chondrites 24 Cr 0.012             Bradley 2004 Jarosewich 1990 CI Chondrites 24 Cr 0.013             Bradley 2004 Palme & Jones 2004 Coarse Interplanetary Dust Particles 24 Cr 0.013             Bradley 2004 Schramm et al. 1989 Chondritic Smooth Interplanetary Dust Particles 24 Cr 0.014             Bradley 2004 Schramm et al. 1989 Interplanetary Dust Particles 24 Cr 0.015             Bradley 2004 Schramm et al. 1989 Chondritic Porous Interplanetary Dust Particles 24 Cr 0.016             Bradley 2004 Schramm et al. 1989 Mars Rocks 24 Cr 0.05   0.025       wt% McSween, Jr. 2004 Wanke et al. 2001 N-MORB 24 Cr 0.07           wt% Workman & Hart 2005 Presnall & Hoover 1987 Mars Rocks 24 Cr 0.1   0.05       wt% McSween, Jr. 2004 Wanke et al. 2001 Mead Peak Phosphatic Shale Member 24 Cr 0.1         41 ppm Gulbrandsen 1966 Phosphoria Formation 24 Cr 0.1         61 ppm Gulbrandsen 1966 Retort Phosphatic Shale Member 24 Cr 0.1         20 ppm Gulbrandsen 1966 Solid Mars 24 Cr 0.1           wt% McSween, Jr. 2004 Hamilton et al. 2001 Wyatt et al. 2001 Solid Mars 24 Cr 0.1           wt% McSween, Jr. 2004 Hamilton et al. 2001 Wyatt et al. 2001 Ocean Island Peridotite 24 Cr 0.15           wt% Pearson et al. 2004 Sen 1988 Continental Intraplate Peridotite 24 Cr 0.18           wt% Pearson et al. 2004 Canil & O'Neill 1996 Ca-Al-rich Inclusions 24 Cr 0.19           wt%ox Bischoff & Keil 1983 McSween 1977 Type F Aggregates 24 Cr 0.19           wt%ox Bischoff & Keil 1983 Wark 1979 Cratonic Peridotite 24 Cr 0.2           wt% Pearson et al. 2004 Canil & O'Neill 1996 Mars Soil 24 Cr 0.2   0.1       wt% McSween, Jr. 2004 Wanke et al. 2001 Mercury Crustal Silicates 24 Cr 0.2           wt% Taylor & Scott 2004 Goettel 1988 Jagoutz et al. 1979 Taylor & McLennan 1985 McDonough & Sun 1995 Continental Arc Xenoliths   Cr/Al 0.214 0.179 0.11     28   Pearson et al. 2004 Continental Intraplate Xenoliths   Cr/Al 0.216 0.182 0.19     273   Pearson et al. 2004 Cratonic Peridotite 24 Cr 0.22           wt% Pearson et al. 2004 Canil & O'Neill 1996 Cratonic Peridotite 24 Cr 0.22           wt% Pearson et al. 2004 Smith et al. 1991 Cratonic Peridotite 24 Cr 0.24           wt% Pearson et al. 2004 Canil & O'Neill 1996 Aubres Aubrite 24 Cr 0.241             Mittlefehldt 2004 Easton 1985 Wolf et al. 1983 Continental Rift Xenoliths   Cr/Al 0.246 0.159 0.183     23   Pearson et al. 2004 Ca-Al-rich Inclusions 24 Cr 0.25           wt%ox Bischoff & Keil 1983 Mantle 24 Cr 0.26           wt% McDonough 2004 Ocean Island Peridotite 24 Cr 0.26           wt% Pearson et al. 2004 Sen 1988 D'Orbigny Angrite 24 Cr 0.262             Mittlefehldt 2004 Mittlefehldt et al. 2002 Ocean Island Peridotite 24 Cr 0.28           wt% Pearson et al. 2004 Sen 1988 Mars Soil 24 Cr 0.3   0.15       wt% McSween, Jr. 2004 Wanke et al. 2001 Mars Soil 24 Cr 0.3   0.15       wt% McSween, Jr. 2004 Wanke et al. 2001 Mercury Crustal Silicates 24 Cr 0.3           wt% Taylor & Scott 2004 Krot et al. 2001 Seawater 24 Cr 0.3           ppb Li 1982 Venus Mantle 24 Cr 0.3           wt% Fegley, Jr. 2004 Lodders & Fegley 1998 Continental Intraplate Peridotite 24 Cr 0.31           wt% Pearson et al. 2004 Zipfel & Worner 1992 Garnet Peridotites 24 Cr 0.32           wt%ox McDonough 1990 Maaloe & Aoki 1975 Chondrules 24 Cr 0.33           wt%ox Bischoff & Keil 1983 Garnet Peridotites 24 Cr 0.34           wt%ox McDonough 1990 Jordan 1979 Primitive Mantle 24 Cr 0.342           wt%ox McDonough & Frey 1989 Anderson 1983 CO Chondrites 24 Cr 0.36   0.02     106 wt% Scott & Krot 2004 Brearley 1993 Greshake 1997 Primitive Mantle 24 Cr 0.37           wt% Walter 2004 Palme & O'Neill 2004 Primitive Mantle 24 Cr 0.38           wt% Workman & Hart 2005 McDonough & Sun 1995 Primitive Mantle 24 Cr 0.38           wt% Pearson et al. 2004 McDonough & Sun 1995 Primitive Mantle 24 Cr 0.38           wt% Walter 2004 Allegre et al. 1995 Primitive Mantle 24 Cr 0.38           wt%ox McDonough & Frey 1989 McDonough & Sun 1989 Primitive Mantle 24 Cr 0.38           wt%ox Allegre et al. 1995 Pyrolites 24 Cr 0.38           wt% Walter 2004 McDougall & Sun 1995 South African Garnet Peridotites 24 Cr 0.38           wt%ox McDonough 1990 Boyd & Mertzman 1987 Primitive Mantle 24 Cr 0.384           wt%ox McDonough & Sun 1995 Silicate Earth 24 Cr 0.384           wt%ox McDonough & Sun 1995 CI Chondrites 24 Cr 0.387           wt%ox McDonough & Frey 1989 Palme et al. 1981 Anders & Ebihara 1982 Beer et al. 1984 Jochum et al. 1986 Mantle Xenoliths 24 Cr 0.39           wt% Pearson et al. 2004 McDonough 1990 Mantle 24 Cr 0.4     0.38 0.42   wt% Walter 2004 Mantle 24 Cr 0.4           wt% Walter 2004 Mars Soil 24 Cr 0.4   0.2       wt% McSween, Jr. 2004 Wanke et al. 2001 Primitive Mantle 24 Cr 0.4           wt%ox McDonough & Frey 1989 Ringwood 1979 Pyrolites 24 Cr 0.4           wt% Walter 2004 Ringwood 1979 CO Chondrites 24 Cr 0.43   0.04     36 wt% Scott & Krot 2004 Brearley 1993 Greshake 1997 Primitive Mantle 24 Cr 0.43           wt% Pearson et al. 2004 Palme & Nickel 1985 Primitive Mantle 24 Cr 0.43           wt%ox McDonough & Frey 1989 Palme & Nickel 1985 Primitive Mantle 24 Cr 0.43           wt%ox McDonough 1990 McDonough & Frey 1989 Sun 1982 CO Chondrites 24 Cr 0.44   0.18     8 wt% Scott & Krot 2004 Brearley 1993 Greshake 1997 Primitive Mantle 24 Cr 0.44           wt%ox McDonough & Frey 1989 Sun 1982 Primitive Mantle 24 Cr 0.44           wt%ox McDonough & Frey 1989 Wanke et al. 1984 Primitive Mantle 24 Cr 0.44           wt%ox McDonough & Sun 1995 Taylor & McLennan 1985 Primitive Mantle 24 Cr 0.44           wt%ox McDonough & Frey 1989 Taylor & McLennan 1985 Silicate Earth 24 Cr 0.44           wt%ox McDonough & Sun 1995 Taylor & McLennan 1985 Spinel Peridotites 24 Cr 0.44           wt%ox McDonough 1990 Maaloe & Aoki 1975 Primitive Mantle 24 Cr 0.45           wt%ox McDonough & Sun 1995 Green et al. 1979 Silicate Earth 24 Cr 0.45           wt%ox McDonough & Sun 1995 Green et al. 1979 Primitive Mantle 24 Cr 0.46           wt%ox McDonough & Sun 1995 Jagoutz et al. 1979 Primitive Mantle 24 Cr 0.46           wt% Pearson et al. 2004 Jagoutz et al. 1979 Silicate Earth 24 Cr 0.46           wt%ox McDonough & Sun 1995 Jagoutz et al. 1979 Xenolites 24 Cr 0.46           wt% Walter 2004 Jagoutz et al. 1979 Primitive Mantle 24 Cr 0.468           wt%ox McDonough & Frey 1989 Hart & Zindler 1986 Low Si-Mg Mantle 24 Cr 0.47           wt% Walter 2004 Hart & Zindler 1986 Mesozoic & Cenozoic Upper Crust   Cr/V 0.47             Condie 1993 Paleozoic Upper Crust   Cr/V 0.47             Condie 1993 Primitive Mantle 24 Cr 0.47           wt% Pearson et al. 2004 Hart & Zindler 1986 Solid Earth 24 Cr 0.47           wt% McDonough 2004 Solid Earth 24 Cr 0.47           wt% McDonough 2004 Solid Earth 24 Cr 0.47           wt% McDonough 2004 Mesozoic & Cenozoic Upper Crust   Cr/V 0.48             Condie 1993 Paleozoic Upper Crust   Cr/V 0.48             Condie 1993 Continental Intraplate Peridotite 24 Cr 0.49           wt% Pearson et al. 2004 Ionov 1996 Oceanic Island Xenoliths   Cr/Al 0.494 0.433 0.379     16   Pearson et al. 2004 Komatiites   Ni/Cr 0.5             McDonough 1991 Continental Intraplate Peridotite 24 Cr 0.52           wt% Pearson et al. 2004 Ionov 1996 Late Proterozoic Upper Crust   Cr/V 0.52             Condie 1993 Continental Intraplate Peridotite 24 Cr 0.53           wt% Pearson et al. 2004 Ionov 1996 Cratonic Peridotite 24 Cr 0.53           wt% Pearson et al. 2004 Smith et al. 1991 Late Proterozoic Upper Crust   Cr/V 0.53             Condie 1993 Chassigny Achondrite 24 Cr 0.55   0.02       wt%ox Boynton et al. 1976 Continental Intraplate Peridotite 24 Cr 0.55           wt% Pearson et al. 2004 Ionov 1996 Cratonic Peridotite 24 Cr 0.57           wt% Pearson et al. 2004 Canil & O'Neill 1996 Depleted D-MORB basalts 24 Cr 0.57           wt% Workman & Hart 2005 Pena Blanca Spring Aubrite 24 Cr 0.62             Mittlefehldt 2004 Wolf et al. 1983 Lodders et al. 1993 Ocean Arc Xenoliths   Cr/Al 0.627 0.66 0.677     21   Pearson et al. 2004 Middle Proterozoic Upper Crust   Cr/V 0.63             Condie 1993 Middle Proterozoic Upper Crust   Cr/V 0.63             Condie 1993 Cratonic Xenoliths   Cr/Al 0.636 0.456 0.858     232   Pearson et al. 2004 Primitive Mantle   Ni/Cr 0.64             McDonough 1990 McDonough & Frey 1989 Sun & McDonough 1989 Sun 1982 Mars Mantle 24 Cr 0.68           wt% McSween, Jr. 2004 Lodders & Fegley 1997 CO Chondrites 24 Cr 0.7   0.2     6 wt% Scott & Krot 2004 Brearley 1993 Greshake 1997 Mars Mantle 24 Cr 0.7           wt% McSween, Jr. 2004 Sanloup 1999 Mercury Crustal Silicates 24 Cr 0.7           wt% Taylor & Scott 2004 Krot et al. 2001 Primitive Mantle   Ni/Cr 0.72             McDonough 1991 Early Proterozoic Upper Crust   Cr/V 0.74             Condie 1993 Kenna Ureilite 24 Cr 0.74   0.02       wt%ox Boynton et al. 1976 Early Proterozoic Upper Crust   Cr/V 0.75             Condie 1993 Depleted MORB Mantle Orthopyroxene 24 Cr 0.76           wt% Workman & Hart 2005 Mars Mantle 24 Cr 0.8           wt% McSween, Jr. 2004 Wanke & Dreibus 1988 Novo-Urei Ureilite 24 Cr 0.8   0.05       wt%ox Boynton et al. 1976 Periodotite Section in Ophiolites   Ni/Cr 0.82   0.35         McDonough 1991 Continental Intraplate Peridotite 24 Cr 0.84           wt% Pearson et al. 2004 Zipfel & Worner 1992 Goalpara Ureilite 24 Cr 0.84   0.03       wt%ox Boynton et al. 1976 Spinel Peridotites   Ni/Cr 0.86   0.31         McDonough 1991 Spinel Peridotites   Ni/Cr 0.86 0.79 0.31     308   McDonough 1990 Venus Mantle 24 Cr 0.87           wt% Fegley, Jr. 2004 Morgan & Anders 1980 Lodders & Fegley 1998 Continental Intraplate Peridotite 24 Cr 0.89           wt% Pearson et al. 2004 Canil & O'Neill 1996 Core 24 Cr 0.9           wt% McDonough 2004 Core 24 Cr 0.9           wt% McDonough 2004 Core 24 Cr 0.9           wt% McDonough 2004 Core 24 Cr 0.9           wt% McDonough 2004 Cratonic Peridotite 24 Cr 0.9           wt% Pearson et al. 2004 Canil & O'Neill 1996 Mercury Crustal Silicates 24 Cr 0           wt% Taylor & Scott 2004 Fegley & Cameron 1987 Mercury Crustal Silicates 24 Cr 0           wt% Taylor & Scott 2004 Goettel 1988 Continental Intraplate Peridotite 24 Cr 1           wt% Pearson et al. 2004 Ionov 1996 Rivers 24 Cr 1           ppb Li 1982 Continental Intraplate Peridotite 24 Cr 1.06           wt% Pearson et al. 2004 Ionov 1996 Garnet Peridotites   Ni/Cr 1.08   0.62         McDonough 1991 Angrite LEW 87051 24 Cr 1.09             Mittlefehldt 2004 Mittlefehldt & Lindstrom 1990 Shallowater Aubrite 24 Cr 1.1             Mittlefehldt 2004 Easton 1985 Keil et al. 1989 Continental Intraplate Peridotite 24 Cr 1.14           wt% Pearson et al. 2004 Ionov 1996 Continental Intraplate Peridotite 24 Cr 1.18           wt% Pearson et al. 2004 Ionov 1996 Continental Intraplate Peridotite 24 Cr 1.18           wt% Pearson et al. 2004 Ionov 1996 Continental Intraplate Peridotite 24 Cr 1.18           wt% Pearson et al. 2004 Ionov 1996 Depleted MORB Mantle Clinopyroxene 24 Cr 1.2           wt% Workman & Hart 2005 Upper Continental Crust   Cr/V 1.2             Condie 1993 Continental Intraplate Peridotite 24 Cr 1.29           wt% Pearson et al. 2004 Ionov 1996 Upper Continental Crust   Cr/V 1.3             Condie 1993 Continental Intraplate Peridotite 24 Cr 1.32           wt% Pearson et al. 2004 Ionov 1996 CI Chondrites   Cr/Mn 1.4             McDonough & Sun 1995 Angrite Angra Dos Reis 24 Cr 1.5             Mittlefehldt 2004 Mittlefehldt & Lindstrom 1990 EET 84302 Acapulcoite 24 Cr 1.5             Mittlefehldt 2004 Weigel et al. 1999 IAB Campo del Cielo 24 Cr 1.5             Mittlefehldt 2004 Bild 1977 Ordinary Chondrites   Cr/Mn 1.51   0.08         McDonough & Sun 1995 Enstatite Chondrites   Cr/Mn 1.54   0.13         McDonough & Sun 1995 Mercury Crustal Silicates 24 Cr 1.6           wt% Taylor & Scott 2004 Morgan & Anders 1980 Early Archean Upper Crust   Cr/Ni 1.7             Condie 1993 Early Archean Upper Crust   Cr/Ni 1.7             Condie 1993 Late Proterozoic Upper Crust   Cr/Ni 1.7             Condie 1993 IAB Landes 24 Cr 1.73             Mittlefehldt 2004 Bild 1977 Cratonic Peridotite 24 Cr 1.74           wt% Pearson et al. 2004 Canil & O'Neill 1996 Late Archean Upper Crust   Cr/Ni 1.8             Condie 1993 Late Proterozoic Upper Crust   Cr/Ni 1.8             Condie 1993 Marine Organisms 24 Cr 1.8           ppm Li 1991 Bowen 1979 Paleozoic Upper Crust   Cr/Ni 1.8             Condie 1993 Paleozoic Upper Crust   Cr/Ni 1.8             Condie 1993 Upper Continental Crust   Cr/Ni 1.8             Condie 1993 Ocean Island Peridotite 24 Cr 1.82           wt% Pearson et al. 2004 Sen 1988 Early Proterozoic Upper Crust   Cr/Ni 1.9             Condie 1993 Early Proterozoic Upper Crust   Cr/Ni 1.9             Condie 1993 Late Archean Upper Crust   Cr/Ni 1.9             Condie 1993 Late Archean Upper Crust   Cr/V 1.9             Condie 1993 Late Archean Upper Crust   Cr/V 1.9             Condie 1993 Mesozoic & Cenozoic Upper Crust   Cr/Ni 1.9             Condie 1993 Mesozoic & Cenozoic Upper Crust   Cr/Ni 1.9             Condie 1993 Middle Proterozoic Upper Crust   Cr/Ni 1.9             Condie 1993 Middle Proterozoic Upper Crust   Cr/Ni 1.9             Condie 1993 Upper Continental Crust   Cr/Ni 1.9             Condie 1993 Winonaite Tierra Blanca 24 Cr 1.91             Mittlefehldt 2004 Kallemeyn & Wasson 1985 Jarosweich 1990 Nuevo Laredo Eucrite 24 Cr 1.93             Mittlefehldt 2004 Warren & Jerde 1987 Sioux County Eucrite 24 Cr 1.98             Mittlefehldt 2004 Barrat et al. 2000 McCarthy et al. 1973 Felsic Volcanics 24 Cr 10           ppm Condie 1993 North American Shale Composite (NASC)   Cr/Th 10.2             Condie 1993 Depleted MORB Mantle Spinel 24 Cr 10.23           wt% Workman & Hart 2005 Chert 24 Cr 10.7         4 ppm Plank & Langmuir 1998 Depleted MORB Mantle Spinel 24 Cr 10.7             Workman & Hart 2005 Chert 24 Cr 10.8         4 ppm Plank & Langmuir 1998 Active Continental Rifts 24 Cr 100           ppm Rudnick & Fountain 1995 Continental Crust 24 Cr 100           µg/g Rudnick & Gao 2004 Taylor 1964 Danube River Particulates 24 Cr 100           µg/g Martin & Meybeck 1979 River Particulates 24 Cr 100           µg/g Martin & Meybeck 1979 Phosphoria Formation 24 Cr 1000         60 ppm Altschuller 1980 Gulbrandsen 1966 North Qinling Belt in China 24 Cr 101           ppm Gao et al. 1998 Oceanic Plateaus 24 Cr 101           ppm Kerr 2004 Reynaud et al. 1999 Paleozoic Orogens 24 Cr 101           ppm Rudnick & Fountain 1995 South Qinling Belt in China 24 Cr 101           ppm Gao et al. 1998 Sumatra Trench 24 Cr 101.5           ppm Plank & Langmuir 1998 Felsic Granulites 24 Cr 102         137 ppm Gao et al. 1998 Intermediate Precambrian Granulites 24 Cr 102         26 ppm Shaw et al. 1986 Mekong River Particulates 24 Cr 102           µg/g Martin & Meybeck 1979 Sandstones 24 Cr 102           ppm Condie 1993 Oceanic Plateaus 24 Cr 1032           ppm Kerr 2004 Kerr et al. 1996 Shales 24 Cr 104           ppm Condie 1993 Upper Continental Crust 24 Cr 104           ppm Condie 1993 Turbidites 24 Cr 106.3         4 ppm Plank & Langmuir 1998 Central East China Craton 24 Cr 107           ppm Gao et al. 1998 Basalts 24 Cr 108         3 ppm Farmer 2004 Chung et al. 1995 North Qinling Belt in China 24 Cr 108           ppm Gao et al. 1998 Basalts 24 Cr 1082         10 ppm Farmer 2004 Chung et al. 2001 East China Craton 24 Cr 109           ppm Gao et al. 1998 South Qinling Belt in China 24 Cr 109           ppm Gao et al. 1998 Chert 24 Cr 11           ppm Elliot et al. 1997 Cratonic Peridotite 24 Cr 11.5           wt% Pearson et al. 2004 Canil & O'Neill 1996 Battle Creek Formation 24 Cr 110         17 ppm Altschuller 1980 De Keyser & Cook 1972 Upper Continental Crust 24 Cr 112           ppm Condie 1993 Upper Continental Crust 24 Cr 112           µg/g Rudnick & Gao 2004 Condie 1993 Rifted Continental Margins 24 Cr 114           ppm Rudnick & Fountain 1995 Shales 24 Cr 115           ppm Condie 1993 Yukon River Particulates 24 Cr 115           µg/g Martin & Meybeck 1979 Central East China Craton 24 Cr 119           ppm Gao et al. 1998 Continental Crust 24 Cr 119           ppm Rudnick & Fountain 1995 Continental Crust 24 Cr 119           µg/g Rudnick & Gao 2004 Rudnick & Fountain 1995 Upper Continental Crust   Cr/Th 12             Condie 1993 Upper Continental Crust   Cr/Th 12             Condie 1993 Hydrothermal Sediment 24 Cr 12.7         4 ppm Plank & Langmuir 1998 Radiolarites 24 Cr 12.9         4 ppm Plank & Langmuir 1998 Intermediate Mafic Granulitic Xenolites 24 Cr 122 95       30 ppm Rudnick & Fountain 1995 Central East China Craton 24 Cr 123           ppm Gao et al. 1998 Lower Continental Crust 24 Cr 123           µg/g Rudnick & Gao 2004 Gao et al. 1998a Marine Phosphorites 24 Cr 125 75   7 400 18 ppm Altschuller 1980 North American Shale Composite (NASC) 24 Cr 125           ppm Condie 1993 Continental Crust 24 Cr 126           µg/g Rudnick & Gao 2004 Wedepohl 1995 Continental Crust 24 Cr 126           ppm Wedepohl 1995 Oceanic Plateaus 24 Cr 127           ppm Kerr 2004 Hauff et al. 2000 Solar System 24 Cr 12700             Anders & Ebihara 1982 Cameron 1982 Continental Shields & Platforms 24 Cr 128           ppm Rudnick & Fountain 1995 Andaman Trench 24 Cr 129.3           ppm Plank & Langmuir 1998 Carbonates 24 Cr 13   0.69     162 ppm Mirota & Veizer 1994 Late Archean Upper Crust   Cr/Sc 13             Condie 1993 Late Archean Upper Crust   Cr/Sc 13             Condie 1993 Radiolarites 24 Cr 13           ppm Elliot et al. 1997 Continental Intraplate Peridotite 24 Cr 13.34           wt% Pearson et al. 2004 Zipfel & Worner 1992 Kimberlite 24 Cr 1305         22 ppm Farmer 2004 Taylor et al. 1994 Interior North China Craton 24 Cr 131           ppm Gao et al. 1998 Mafic Granulites 24 Cr 131         128 ppm Gao et al. 1998 Continental Crust 24 Cr 132           ppm Rudnick & Fountain 1995 Wedepohl 1995 Mesozoic & Cenozoic Extensions 24 Cr 132           ppm Rudnick & Fountain 1995 Mesozoic & Cenozoic Orogens 24 Cr 132           ppm Rudnick & Fountain 1995 Lower Continental Crust 24 Cr 133           µg/g Rudnick & Gao 2004 Condie & Selverstone 1999 Basalts 24 Cr 134         7 ppm Farmer 2004 Conticelli et al. 1997 DSDP/ODP Site 801 24 Cr 134           ppm Elliot et al. 1997 DSDP/ODP Site 801 24 Cr 134.2           ppm Plank & Langmuir 1998 Solar System 24 Cr 13400   1072     12   Anders & Ebihara 1982 Continental Crust 24 Cr 135           µg/g Rudnick & Gao 2004 Rudnick & Fountain 1995 Continental Crust 24 Cr 135           µg/g Rudnick & Gao 2004 Continental Crust 24 Cr 135           ppm Kemp & Hawkesworth 2004 Rudnick & Gao 2004 Metapelitic Granulitic Xenolites 24 Cr 135 117       56 ppm Rudnick & Fountain 1995 Shergotty Meteorite 24 Cr 1350   100       ppm McSween, Jr. 2004 Lodders 1998 Solar System 24 Cr 13500   1030     13   Anders & Grevesse 1989 Magdalena River Particulates 24 Cr 136           µg/g Martin & Meybeck 1979 Phanerozoic Flood Basalts 24 Cr 137         9 ppm Farmer 2004 Wooden et al. 1993 Oceanic Plateaus 24 Cr 1373           ppm Kerr 2004 Aitken & Echeverria 1984 Dupre & Echeverria 1984 Jochum et al. 1991 Graywackes 24 Cr 139           ppm Condie 1993 Oceanic Plateaus 24 Cr 1393           ppm Kerr 2004 Kerr et al. 2002 Archean Canadian Shield 24 Cr 140           ppm Shaw et al. 1986 Taylor & McLennan 1981 Late Archean Upper Crust 24 Cr 140           ppm Condie 1993 Central East China Craton 24 Cr 141           ppm Gao et al. 1998 Continental Arcs 24 Cr 141           ppm Rudnick & Fountain 1995 Lower Continental Crust 24 Cr 144           ppm Shaw et al. 1986 Precambrian Granulites 24 Cr 144         88 ppm Shaw et al. 1986 Continental Crust 24 Cr 145           ppm Wedepohl & Hartmann 1994 Wedepohl 1991 Granulites 24 Cr 145 56       369 ppm Rudnick & Presper 1990 Lower Continental Crust 24 Cr 145           µg/g Rudnick & Gao 2004 Rudnick & Presper 1990 Basalts 24 Cr 147           ppm Condie 1993 Radiolarites 24 Cr 15.6         17 ppm Plank & Langmuir 1998 Basalts 24 Cr 150           ppm Condie 1993 Niger River Particulates 24 Cr 150           µg/g Martin & Meybeck 1979 Phanerozoic Flood Basalts 24 Cr 151         18 ppm Farmer 2004 Lightfoot et al. 1990 Basalts 24 Cr 152           ppm Condie 1993 Basalts 24 Cr 153         44 ppm Farmer 2004 Baker et al. 1997 Intermediate Mafic Archean Granulites 24 Cr 155 103       90 ppm Rudnick & Fountain 1995 Intermediate Granulites 24 Cr 157         136 ppm Gao et al. 1998 Basalts 24 Cr 158           ppm Condie 1993 Granites 24 Cr 16           ppm Condie 1993 Shalka Diogenite 24 Cr 16.5             Mittlefehldt 2004 McCarthy et al. 1972 Mittlefehldt 1994 Arenaceous Rocks 24 Cr 161         121 ppm Gao et al. 1998 Late Archean Upper Crust 24 Cr 161           ppm Condie 1993 N-MORB 24 Cr 161           ppm Klein 2004 Lehnert 2000 Ashy Clay 24 Cr 161.3         4 ppm Plank & Langmuir 1998 Archean Terrains 24 Cr 162           ppm Rudnick & Fountain 1995 Oceanic Plateaus 24 Cr 162           ppm Kerr 2004 Mahoney et al. 1993 Orangeite 24 Cr 1624         114 ppm Farmer 2004 Mitchell 1995 Oceanic Plateaus 24 Cr 163           ppm Kerr 2004 Mahoney et al. 1993 Pelagic Clay 24 Cr 164.4         6 ppm Plank & Langmuir 1998 Marianas Trench 24 Cr 164.5           ppm Plank & Langmuir 1998 Central East China Craton 24 Cr 165           ppm Gao et al. 1998 Mavic Volcanics 24 Cr 166         632 ppm Gao et al. 1998 Oceanic Plateaus 24 Cr 166           ppm Kerr 2004 Salters et al. 1992 Talkeetna Arc Plutonic Rocks 24 Cr 167   4     31 ppm Kelemen et al. 2004 Lower Continental Crust 24 Cr 168           µg/g Rudnick & Gao 2004 Shaw et al. 1994 Late Archean Upper Crust   Cr/Th 17             Condie 1993 Andesites 24 Cr 170           ppm Condie 1993 Sera de Mage Eucrite 24 Cr 1740           ppm Morgan et al. 1978 Schmitt et al. 1972 Active Continental Rifts 24 Cr 175           ppm Rudnick & Fountain 1995 Congo River Particulates 24 Cr 175           µg/g Martin & Meybeck 1979 Dover Sandstone 24 Cr 175         4 ppm Altschuller 1980 Cathcart & Schmidt 1974 Graywackes 24 Cr 175           ppm Condie 1993 Paleozoic Orogens 24 Cr 175           ppm Rudnick & Fountain 1995 Pungo River Formation 24 Cr 175         2 ppm Altschuller 1980 Nakhla Meteorite 24 Cr 1770   280       ppm McSween, Jr. 2004 Lodders 1998 Lower Continental Crust 24 Cr 178           µg/g Rudnick & Gao 2004 Villaseca et al. 1999 Oceanic Plateaus 24 Cr 178           ppm Kerr 2004 Kerr et al. 1996 Granites 24 Cr 18           ppm Condie 1993 Continental Intraplate Peridotite 24 Cr 18.25           wt% Pearson et al. 2004 Ionov 1996 Interlayered Clay & Chert 24 Cr 18.9         12 ppm Plank & Langmuir 1998 Archean Terrains 24 Cr 180           ppm Taylor & McLennan 1995 Basalts 24 Cr 182           ppm Condie 1993 Continental Crust 24 Cr 185           µg/g Rudnick & Gao 2004 Taylor & McLennan 1985 Taylor & McLennan 1995 Continental Crust 24 Cr 185           ppm Palme & O'Neill 2004 Rudnick & Gao 2004 Continental Crust 24 Cr 185           ppm Taylor & McLennan 1995 Talkeetna Arc Plutonic Rocks 24 Cr 188   21     6 ppm Kelemen et al. 2004 Amazon River Particulates 24 Cr 193           µg/g Martin & Meybeck 1979 Basalts 24 Cr 193         3 ppm Farmer 2004 Wilson et al. 1997 Oceanic Plateaus 24 Cr 193           ppm Kerr 2004 Salters et al. 1992 Igneous Rocks 24 Cr 1930           ppm Morgan et al. 1978 Schmitt et al. 1972 Oceanic Plateaus 24 Cr 194           ppm Kerr 2004 Aitken & Echeverria 1984 Dupre & Echeverria 1984 Jochum et al. 1991 DSDP/ODP Site 800 24 Cr 194.7           ppm Plank & Langmuir 1998 Australian Granite 24 Cr 2         8 ppm Kemp & Hawkesworth 2004 Whalen 1985 Australian Granite 24 Cr 2           ppm Kemp & Hawkesworth 2004 Collins et al. 1982 Pacific Ocean Surface Water 24 Cr 2             Bruland 1983 Cratonic Peridotite 24 Cr 2.07           wt% Pearson et al. 2004 Canil & O'Neill 1996 Winonaite Pontlyfni 24 Cr 2.087             Mittlefehldt 2004 Graham et al. 1977 Davis et al. 1977 Ibitira Eucrite 24 Cr 2.12             Mittlefehldt 2004 Jarosewich 1990 Barrat et al. 2000 Watson IIE Iron 24 Cr 2.173             Mittlefehldt 2004 Olsen et al. 1994 Carbonaceous Chondrites   Cr/Mn 2.2   0.5         McDonough & Sun 1995 Stannern Eucrite 24 Cr 2.2             Mittlefehldt 2004 Barrat et al. 2000 McCarthy et al. 1973 Cratonic Peridotite 24 Cr 2.22           wt% Pearson et al. 2004 Smith et al. 1991 Seawater 24 Cr 2.3     3 5     Jeandel & Minster 1987 Y-791491 Lodranite 24 Cr 2.35             Mittlefehldt 2004 Weigel et al. 1999 Qingzhen Enstatite Chondrite 24 Cr 2.39             Grossman et al. 1985 Macibini Eucrites 24 Cr 2.5             Mittlefehldt 2004 McCarthy et al. 1973 Buchanan et al. 2000b Primitive Mantle   Cr/Mn 2.5             McDonough & Sun 1995 Silicate Earth   Cr/Mn 2.5             McDonough & Sun 1995 Orgueil Chondrite 24 Cr 2.54             Grossman et al. 1985 Seawater 24 Cr 2.6             Li 1991 Whitfield & Turner 1987 Cratonic Peridotite 24 Cr 2.64           wt% Pearson et al. 2004 Canil & O'Neill 1996 CI Chondrites 24 Cr 2.67           ppm McDonough & Sun 1995 Palme 1988 Y-74450 Eucrites 24 Cr 2.71             Mittlefehldt 2004 Wanke et al. 1977 Gibson Lodranite 24 Cr 2.8             Mittlefehldt 2004 Weigel et al. 1999 Moore County Eucrite 24 Cr 2.81             Mittlefehldt 2004 Barrat et al. 2000 McCarthy et al. 1973 Alborz Mountains 24 Cr 20         3 ppm Altschuller 1980 Aval et al. 1968 Australian Granite 24 Cr 20         1074 ppm Kemp & Hawkesworth 2004 Wormald & Price 1988 Felsic Volcanics 24 Cr 20           ppm Condie 1993 Late Archean Upper Crust   Cr/Th 20             Condie 1993 Andesites 24 Cr 200           ppm Condie 1993 Granulites 24 Cr 203 56       483 ppm Rudnick & Presper 1990 Oceanic Plateaus 24 Cr 208           ppm Kerr 2004 Kerr et al. 1997 Hauff et al. 2000 Early Archean Upper Crust   Cr/Sc 21             Condie 1993 Juvinas Eucrite 24 Cr 2100           ppm Morgan et al. 1978 Schmitt et al. 1972 Wanke et al. 1972 North American Shale Composite (NASC) 24 Cr 2100           ppm Morgan et al. 1978 Protolith Gabbros at ODP Site 735 24 Cr 212         8 ppm Hart et al. 1999 Continental Shields & Platforms 24 Cr 213           ppm Rudnick & Fountain 1995 Lower Continental Crust 24 Cr 215           ppm Rudnick & Fountain 1995 Lower Continental Crust 24 Cr 215           µg/g Rudnick & Gao 2004 Rudnick & Fountain 1995 Lower Continental Crust 24 Cr 215           µg/g Rudnick & Gao 2004 Rudnick & Fountain 1995 Lower Continental Crust 24 Cr 215           ppm Kemp & Hawkesworth 2004 Rudnick & Gao 2004 Amphibolites 24 Cr 217         189 ppm Gao et al. 1998 Lower Continental Crust 24 Cr 219           µg/g Rudnick & Gao 2004 Taylor & McLennan 1985 Taylor & McLennan 1995 Early Archean Upper Crust   Cr/Sc 22             Condie 1993 Tonalites-Trondhjemites-Granodiorites 24 Cr 22           ppm Condie 1993 Continental Intraplate Peridotite 24 Cr 22.37           wt% Pearson et al. 2004 Ionov 1996 Interlayered Chert & Limestone 24 Cr 22.5         5 ppm Plank & Langmuir 1998 Monterey Formation 24 Cr 220         5 ppm Altschuller 1980 Sera de Mage Eucrite 24 Cr 2200           ppm Morgan et al. 1978 Interior North China Craton 24 Cr 221           ppm Gao et al. 1998 Basalts 24 Cr 224         9 ppm Farmer 2004 Hoang & Flower 1998 Basalts 24 Cr 225         12 ppm Farmer 2004 Dungan et al. 1986 Lower Continental Crust 24 Cr 228           ppm Wedepohl 1995 Lower Continental Crust 24 Cr 228           µg/g Rudnick & Gao 2004 Wedepohl 1995 Continental Intraplate Peridotite 24 Cr 23.05           wt% Pearson et al. 2004 Ionov 1996 Kamchatka Trench 24 Cr 23.7           ppm Plank & Langmuir 1998 Primitive Mantle   Fe/Cr 23.8             McDonough & Sun 1995 Silicate Earth   Fe/Cr 23.8             McDonough & Sun 1995 Archean Terrains 24 Cr 230           ppm Taylor & McLennan 1995 Early Archean Upper Crust 24 Cr 231           ppm Condie 1993 Basalts 24 Cr 232         6 ppm Farmer 2004 Marzoli et al. 2000 Basalts 24 Cr 233         4 ppm Farmer 2004 Chung 1999 Lower Continental Crust 24 Cr 235           ppm Taylor & McLennan 1995 Precambrian Canadian Shield 24 Cr 237           ppm Shaw et al. 1986 Oceanic Plateaus 24 Cr 238           ppm Kerr 2004 Tejada et al. 1996 Continental Arcs 24 Cr 239           ppm Rudnick & Fountain 1995 Rifted Continental Margins 24 Cr 239           ppm Rudnick & Fountain 1995 Granites 24 Cr 24         402 ppm Gao et al. 1998 Izu-Bonin Trench 24 Cr 24           ppm Plank & Langmuir 1998 Sandstones 24 Cr 24           ppm Condie 1993 Tonga Trench 24 Cr 24.6           ppm Plank & Langmuir 1998 Basalts 24 Cr 248         16 ppm Farmer 2004 Jung & Hoernes 2000 Felsic Volcanics 24 Cr 25           ppm Condie 1993 Metafelsic Volcanics 24 Cr 25         41 ppm Gao et al. 1998 Periodotite Section in Ophiolites   Fe/Cr 25   7         McDonough 1991 Primitive Mantle   Fe/Cr 25             McDonough 1991 Upper Continental Crust 24 Cr 25           ppm Shaw et al. 1986 Taylor & McLennan 1981 Ocean Island Peridotite 24 Cr 25.97           wt% Pearson et al. 2004 Sen 1988 N-MORB 24 Cr 250           ppm Klein 2004 Thompson et al. 1980 Seawater 24 Cr 250             Li 1991 Whitfield & Turner 1987 Depleted Mantle 24 Cr 2500   1000       ppm Salters & Stracke 2004 North American Shale Composite (NASC) 24 Cr 2500           ppm Morgan et al. 1978 Wanke & Palme 1974 Primitive Mantle 24 Cr 2500           ppm Wedepohl & Hartmann 1994 Wedepohl 1991 N-MORB 24 Cr 251           ppm Klein 2004 Lehnert 2000 Andesites 24 Cr 252.76         27 ppm Kelemen et al. 2004 Primitive Mantle 24 Cr 2520   252       ppm Palme & O'Neill 2004 O'Neill & Palme 1998 Primitive Mantle 24 Cr 2520           ppm Palme & O'Neill 2004 O'Neill & Palme 1998 Continental Arc Xenoliths 24 Cr 2521 2552 499     28   Pearson et al. 2004 N-MORB 24 Cr 253           ppm Klein 2004 Niu et al. 1999 Balmuccia Spinel Lherzolites 24 Cr 2568   176     18 ppm Wedepohl & Hartmann 1994 Mafic Intrusions 24 Cr 259         308 ppm Gao et al. 1998 Granites 24 Cr 26           ppm Kemp & Hawkesworth 2004 Sylvester 1995 Interlayerd Clay & Chert 24 Cr 26         2 ppm Plank & Langmuir 1998 Spinel Peridotites   Fe/Cr 26   9         McDonough 1991 Oceanic Plateaus 24 Cr 260           ppm Kerr 2004 Salters et al. 1992 Island Arc Andesite 24 Cr 260.75         21 ppm Kelemen et al. 2004 Primitive Mantle 24 Cr 2625   393.75       ppm McDonough & Sun 1995 Silicate Earth 24 Cr 2625           ppm McDonough 2004 Silicate Earth 24 Cr 2625   393.75       ppm McDonough & Sun 1995 Silicate Earth 24 Cr 2625           µg/g McDonough 1998 Baldissero Spinel Lherzolites 24 Cr 2628   38     14 ppm Wedepohl & Hartmann 1994 CI Chondrites 24 Cr 2646   79.38       ppm Palme & O'Neill 2004 Palme & Jones 2004 CI Chondrites 24 Cr 2646   79.38       ppm Palme & Jones 2004 Palme & Beer 1993 Mishash Formation 24 Cr 265         3 ppm Altschuller 1980 Mazor 1963 CI Chondrites 24 Cr 2650           ppm McDonough & Sun 1995 CI Chondrites 24 Cr 2650           ppm McDonough & Sun 1995 Wasson & Kallemeyn 1988 Orgueil Chondrite 24 Cr 2650         8 ppm Anders & Ebihara 1982 Basalts 24 Cr 266         7 ppm Farmer 2004 Price et al. 1997 Scotia Island Basalt 24 Cr 266.33         15 ppm Kelemen et al. 2004 CI Chondrites 24 Cr 2660   202     13 ppm Anders & Grevesse 1989 CI Chondrites 24 Cr 2660           ppm Palme & Jones 2004 Anders & Grevesse 1989 Orgueil Chondrite 24 Cr 2660         9 ppm Anders & Grevesse 1989 Basalts 24 Cr 268         13 ppm Farmer 2004 Robert et al. 1992 Oceans Surface water 24 Cr 268           ng/kg Quinby-Hunt & Turekian 1983 Cranston 1979 Greater Antilles Basalt 24 Cr 269.13         15 ppm Kelemen et al. 2004 Spinel Peridotites 24 Cr 2690 2690 705     325 ppm McDonough 1990 Brown Rock 24 Cr 27         3 ppm Altschuller 1980 St. Lawrence River Particulates 24 Cr 270           µg/g Martin & Meybeck 1979 Komatiites 24 Cr 2700           ppm Condie 1993 Basalts 24 Cr 273         16 ppm Farmer 2004 Rogers et al. 1998 Continental Rift Xenoliths 24 Cr 2749 2703 640     23   Pearson et al. 2004 Lower Continental Crust 24 Cr 276           µg/g Rudnick & Gao 2004 Rudnick & Taylor 1987 Oceanic Island Xenoliths 24 Cr 2794 2601 806     16   Pearson et al. 2004 Carbonate 24 Cr 28         13 ppm Plank & Langmuir 1998 Continental Intraplate Xenoliths 24 Cr 2819 2740 625     273   Pearson et al. 2004 Early Archean Upper Crust 24 Cr 286           ppm Condie 1993 Ultrabasic Precambrian Granulites 24 Cr 289         14 ppm Shaw et al. 1986 Garnet Peridotites   Fe/Cr 29   9         McDonough 1991 Tonalites-Trondhjemites-Granodiorites 24 Cr 29         355 ppm Kemp & Hawkesworth 2004 Martin 1995 Nano Ooze 24 Cr 29.4         4 ppm Plank & Langmuir 1998 ODP Site 735 24 Cr 290.1 248       22 ppm Hart et al. 1999 Basalts 24 Cr 296         6 ppm Farmer 2004 Turner et al. 1996a Oceans Deep water 24 Cr 296           ng/kg Quinby-Hunt & Turekian 1983 Cranston 1979 Serra De Mage Eucrite 24 Cr 3.08             Mittlefehldt 2004 Barrat et al. 2000 McCarthy et al. 1973 Mesozoic & Cenozoic Upper Crust   Cr/Sc 3.1             Condie 1993 Petersburg Eucrites 24 Cr 3.16             Mittlefehldt 2004 Mason et al. 1979 Buchanan & Reid 1996 Mesozoic & Cenozoic Upper Crust   Cr/Sc 3.2             Condie 1993 Paleozoic Upper Crust   Cr/Sc 3.2             Condie 1993 IAB Udei Station 24 Cr 3.23             Mittlefehldt 2004 Kallemeyn & Wasson 1985 META 78008 Urelite 24 Cr 3.23             Mittlefehldt 2004 Warren & Kallemeyn 1992 Early Archean Upper Crust   Cr/V 3.3             Condie 1993 Late Proterozoic Upper Crust   Cr/Sc 3.3             Condie 1993 Late Proterozoic Upper Crust   Cr/Sc 3.3             Condie 1993 Mercury Crustal Silicates 24 Cr 3.3           wt% Taylor & Scott 2004 Morgan & Anders 1980 Paleozoic Upper Crust   Cr/Sc 3.3             Condie 1993 Intra Stellar Medium 24 Cr 3.4   0.17         Palme & Jones 2004 Savage & Sembach 1996 Early Archean Upper Crust   Cr/V 3.5             Condie 1993 Cratonic Peridotite 24 Cr 3.54           wt% Pearson et al. 2004 Canil & O'Neill 1996 Chaunskij Mesosiderite 24 Cr 3.83             Mittlefehldt 2004 Mittlefehldt in press Petaev et al. 2000 MAC 88177 Lodranite 24 Cr 3.85             Mittlefehldt 2004 Weigel et al. 1999 Malvern Howardites 24 Cr 3.855             Mittlefehldt 2004 Palme et al. 1978 Middle Proterozoic Upper Crust   Cr/Sc 3.9             Condie 1993 ALH 84025 Brachinite 24 Cr 3.94             Mittlefehldt 2004 Warren & Kallemeyn 1989a Australian Granite 24 Cr 30         704 ppm Kemp & Hawkesworth 2004 Chappell & White 1992 Early Archean Upper Crust   Cr/Th 30             Condie 1993 Felsic Volcanics 24 Cr 30         972 ppm Gao et al. 1998 Tonalites-Trondhjemites-Granodiorites 24 Cr 30         641 ppm Gao et al. 1998 Diatom Oozes & Clay 24 Cr 30.2         15 ppm Plank & Langmuir 1998 South Sandwich Trench 24 Cr 30.2           ppm Plank & Langmuir 1998 Oulad Abdoun Basin 24 Cr 300         4 ppm Altschuller 1980 Phanerozoic Flood Basalts 24 Cr 307         1 ppm Farmer 2004 Peate 1997 Granulitic Xenolites 24 Cr 308 148       256 ppm Rudnick & Presper 1990 Basic Precambrian Granulites 24 Cr 317         25 ppm Shaw et al. 1986 Oceanic Crust 24 Cr 317           ppm Wedepohl & Hartmann 1994 Wedepohl 1981 Kermadec Basalts 24 Cr 317.1         10 ppm Kelemen et al. 2004 Graywackes 24 Cr 318           ppm Condie 1993 Archean Amphibolites 24 Cr 32           ppm Weaver & Tarney 1984 Weaver & Tarney 1981 Central America Trench 24 Cr 32           ppm Plank & Langmuir 1998 Komatiites   Fe/Cr 32             McDonough 1991 Middle Continental Crust 24 Cr 32           µg/g Rudnick & Gao 2004 Weaver & Tarney 1984 Primitive Mantle   Cr/V 32             McDonough & Sun 1995 Silicate Earth   Cr/V 32             McDonough & Sun 1995 Volcanoclastic Turbidites 24 Cr 320.9         13 ppm Plank & Langmuir 1998 Volcanoclastic Turbidites 24 Cr 321           ppm Elliot et al. 1997 Marianas Basalt 24 Cr 322.5         22 ppm Kelemen et al. 2004 Talkeetna Arc Plutonic Rocks 24 Cr 3239   105     17 ppm Kelemen et al. 2004 Continental Arc Andesite 24 Cr 326.83         55 ppm Kelemen et al. 2004 Tonalites-Trondhjemites-Granodiorites 24 Cr 33           ppm Condie 1993 Metalliferous Clay 24 Cr 33.7         12 ppm Plank & Langmuir 1998 Seawater 24 Cr 330           ng/kg Quinby-Hunt & Turekian 1983 Cranston 1979 Seawater 24 Cr 330           ng/kg Quinby-Hunt & Turekian 1983 Cranston 1979 Ocean Arc Xenoliths 24 Cr 3326 2998 1021     21   Pearson et al. 2004 Basalts 24 Cr 334         23 ppm Farmer 2004 Paslick et al. 1995 Luzon Basalt 24 Cr 339.57         7 ppm Kelemen et al. 2004 Basalts 24 Cr 343         8 ppm Farmer 2004 Marzoli et al. 2000 Andes Basalt 24 Cr 344.42         26 ppm Kelemen et al. 2004 Mafic Post-Archean Granulites 24 Cr 345 153       74 ppm Rudnick & Fountain 1995 Primitive Mantle 24 Cr 3465           ppm Wedepohl & Hartmann 1994 Jagoutz et al. 1979 Enstatite Chondrites   Mg/Cr 35   4         McDonough & Sun 1995 Granites 24 Cr 35         8 ppm Kemp & Hawkesworth 2004 Kemp 2001 Manganese Nodules 24 Cr 35           ppm Li 1991 Baturin 1988 Precambrian Canadian Shield 24 Cr 35           ppm Shaw et al. 1986 Tonalites-Trondhjemites-Granodiorites 24 Cr 35           ppm Condie 1993 Upper Continental Crust 24 Cr 35           ppm Wedepohl 1995 Upper Continental Crust 24 Cr 35           µg/g Rudnick & Gao 2004 Wedepohl 1995 Upper Continental Crust 24 Cr 35           µg/g Rudnick & Gao 2004 Shaw et al. 1967 Shaw et al. 1976 Upper Continental Crust 24 Cr 35           ppm Taylor et al. 1983 Taylor & McLennan 1981 Upper Continental Crust 24 Cr 35           ppm Weaver & Tarney 1984 Taylor & McLennan 1981 Upper Continental Crust 24 Cr 35           ppm Taylor & McLennan 1995 Seawater 24 Cr 350           ng/kg Quinby-Hunt & Turekian 1983 Cranston 1979 Mafic Granulitic Xenolites 24 Cr 353 252       192 ppm Rudnick & Fountain 1995 Fresh Mid-Ocean Ridge Basalts 24 Cr 357.1         48 ppm Kelemen et al. 2004 Cascade Basalt 24 Cr 358.75         24 ppm Kelemen et al. 2004 CI Chondrites   Mg/Cr 36.4             McDonough & Sun 1995 Diatome Ooze 24 Cr 36.5         4 ppm Plank & Langmuir 1998 Japan Trench 24 Cr 37.3           ppm Plank & Langmuir 1998 Kuriles Trench 24 Cr 37.3           ppm Plank & Langmuir 1998 Basalts 24 Cr 377         8 ppm Farmer 2004 Zhang & O'Reilly 1997 Cratonic Xenoliths 24 Cr 3778 2861 2720     232   Pearson et al. 2004 Early Archean Upper Crust   Cr/Th 38             Condie 1993 Tonalites 24 Cr 38           ppm Wedepohl 1995 Carbonaceous Chondrites   Mg/Cr 39   2         McDonough & Sun 1995 Ordinary Chondrites   Mg/Cr 39   1         McDonough & Sun 1995 Phanerozoic Flood Basalts 24 Cr 39         36 ppm Farmer 2004 Hooper & Hawkesworth 1993 Continental Arc Andesite 24 Cr 397.96         145 ppm Kelemen et al. 2004 CI Chondrites   Ni/Cr 4             McDonough 1990 McDonough & Frey 1989 Sun & McDonough 1989 Sun 1982 Middle Proterozoic Upper Crust   Cr/Sc 4             Condie 1993 Seawater 24 Cr 4     2 5     Bruland 1983 Miles IIE Iron 24 Cr 4.07             Mittlefehldt 2004 Ebihara et al. 1997 Havero Urelite 24 Cr 4.09             Mittlefehldt 2004 Wanke et al. 1972 Early Proterozoic Upper Crust   Cr/Sc 4.1             Condie 1993 Early Proterozoic Upper Crust   Cr/Sc 4.2             Condie 1993 Mesozoic & Cenozoic Upper Crust   Cr/Th 4.3             Condie 1993 Late Proterozoic Upper Crust   Cr/Th 4.4             Condie 1993 Brachina Brachinite 24 Cr 4.44             Mittlefehldt 2004 Nehru et al. 1983 Paleozoic Upper Crust   Cr/Th 4.5             Condie 1993 Kapoeta Howardites 24 Cr 4.75             Mittlefehldt 2004 Wanke et al. 1972 ALHA 77257 Urelite 24 Cr 4.8             Mittlefehldt 2004 Jarosewich 1990 Warren & Kallemeyn 1992 Spitz & Boynton 1991 EET 83309 Urelite 24 Cr 4.85             Mittlefehldt 2004 Warren & Kallemeyn 1989b ALHA 81101 Urelite 24 Cr 4.9             Mittlefehldt 2004 Warren & Kallemeyn 1992 Spitz & Boynton 1991 Andesites 24 Cr 40           ppm Condie 1993 Carbonaceous Chondrites   Cr/V 40   3         McDonough & Sun 1995 Volcanoclastic Sediment 24 Cr 40         15 ppm Plank & Langmuir 1998 Pelagic Clay 24 Cr 40.3         56 ppm Plank & Langmuir 1998 Pelagic Clay 24 Cr 40.3         56 ppm Plank & Langmuir 1998 Slope Lisbourne Group 24 Cr 400         4 ppm Altschuller 1980 Patton & Matzko 1959 Oceanic Plateaus 24 Cr 401           ppm Kerr 2004 Salters et al. 1992 Basalts 24 Cr 406           ppm Condie 1993 Felsic Post-Archean Granulites 24 Cr 41 22       134 ppm Rudnick & Fountain 1995 Andesites 24 Cr 42           ppm Condie 1993 Diatome Clay 24 Cr 42         6 ppm Plank & Langmuir 1998 Brown Clay 24 Cr 42.2         4 ppm Plank & Langmuir 1998 New Hebrides Islands 24 Cr 420.11         18 ppm Kelemen et al. 2004 Solid Earth 24 Cr 4290           ppm Allegre et al. 1995 Arenaceous Rocks 24 Cr 43         2754 ppm Gao et al. 1998 Middle Continental Crust 24 Cr 43           µg/g Rudnick & Gao 2004 Shaw et al. 1994 North Qinling Belt in China 24 Cr 43           ppm Gao et al. 1998 Tonalites-Trondhjemites-Granodiorites 24 Cr 43         553 ppm Gao et al. 1998 East Sunda Trench 24 Cr 43.6           ppm Plank & Langmuir 1998 Volcanoclastic Turbidites 24 Cr 439.3         43 ppm Plank & Langmuir 1998 Mesozoic & Cenozoic Upper Crust 24 Cr 44           ppm Condie 1993 Diatome Mud 24 Cr 44.8         6 ppm Plank & Langmuir 1998 Kamchatka Basalt 24 Cr 442.26         39 ppm Kelemen et al. 2004 Fresh MORB in Indian Ocean 24 Cr 446           ppm Klein 2004 Klein et al. 1991 Aleutian Basalts 24 Cr 449.93         27 ppm Kelemen et al. 2004 Andean Andesites 24 Cr 45           ppm Weaver & Tarney 1984 Bailey 1981 Enstatite Chondrites   Mg/Cr 45   8         McDonough & Sun 1995 La Caja Formation 24 Cr 45         8 ppm Altschuller 1980 Rogers et al. 1956 Paleozoic Upper Crust 24 Cr 45           ppm Condie 1993 Post-Archean Terrrains 24 Cr 45           ppm Shaw et al. 1986 Eade & Fahrig 1971 Talkeetna Arc Plutonic Rocks 24 Cr 45.2   0.7     86 ppm Kelemen et al. 2004 Peru Trench 24 Cr 45.7           ppm Plank & Langmuir 1998 Ryuku Trench 24 Cr 45.9           ppm Plank & Langmuir 1998 Basalts 24 Cr 456           ppm Condie 1993 Mafic Archean Granulites 24 Cr 464 229       92 ppm Rudnick & Fountain 1995 CI Chondrites   Cr/V 47             McDonough & Sun 1995 Felsic Archean Granulites 24 Cr 47 16       249 ppm Rudnick & Fountain 1995 Island Arcs 24 Cr 47         323 ppm Kemp & Hawkesworth 2004 Silver & Chappell 1998 Late Proterozoic Upper Crust 24 Cr 47           ppm Condie 1993 Solid Earth 24 Cr 4700           µg/g McDonough 1998 Solid Earth 24 Cr 4700           ppm McDonough 2004 Andesites 24 Cr 48           ppm Condie 1993 Battle Creek Formation 24 Cr 48         7 ppm Altschuller 1980 De Keyser & Cook 1972 Vanuatu Trench 24 Cr 48           ppm Plank & Langmuir 1998 Cratonic Peridotite 24 Cr 49.4           wt% Pearson et al. 2004 Canil & O'Neill 1996 Lower Continental Crust 24 Cr 490           µg/g Rudnick & Gao 2004 Liu et al. 2001 Central American Basalts 24 Cr 491.51         29 ppm Kelemen et al. 2004 Australian Granite 24 Cr 5         6 ppm Kemp & Hawkesworth 2004 Turner et al. 1992 Felsic Volcanics 24 Cr 5           ppm Condie 1993 Pacific Ocean Deep Water 24 Cr 5             Bruland 1983 Mincy Mesosiderite 24 Cr 5.03             Mittlefehldt 2004 Mittlefehldt in press Simpson & Ahrens 1977 Colombia Trench 24 Cr 5.1           ppm Plank & Langmuir 1998 Middle Proterozoic Upper Crust   Cr/Th 5.3             Condie 1993 Barea Mesosiderite 24 Cr 5.42             Mittlefehldt 2004 Mason & Jarosewich 1973 Mittlefehldt in press Late Proterozoic Upper Crust   Cr/Th 5.5             Condie 1993 Comet Halley 24 Cr 5.53   0.09         Anders & Grevesse 1989 Jessberger et al. 1988 Miles IIE Iron 24 Cr 5.55             Mittlefehldt 2004 Ebihara et al. 1997 Binda Eucrite 24 Cr 5.61             Mittlefehldt 2004 Barrat et al. 2000 McCarthy et al. 1973 Johnstown Diogenite 24 Cr 5.61             Mittlefehldt 2004 Wanke et al. 1977 CI Chondrites 24 Cr 5.67   0.01         Palme & Jones 2004 Solar Photosphere 24 Cr 5.67   0.03         Palme & Jones 2004 Grevesse & Sauval 1998 Solar Photosphere 24 Cr 5.67   0.03         Anders & Grevesse 1989 Solar System 24 Cr 5.67   0.2835         Palme & Jones 2004 Early Proterozoic Upper Crust   Cr/Th 5.7             Condie 1993 Mesozoic & Cenozoic Upper Crust   Cr/Th 5.7             Condie 1993 Paleozoic Upper Crust   Cr/Th 5.8             Condie 1993 Solar Corona 24 Cr 5.81   0.09         Anders & Grevesse 1989 Solar Corona 24 Cr 5.81   0.08         Anders & Grevesse 1989 Breneman & Stone 1985 Andesites 24 Cr 50           ppm Condie 1993 Bambui Group 24 Cr 50         14 ppm Altschuller 1980 Cathcart 1974 Belkinsk Akai Sayan 24 Cr 50         33 ppm Altschuller 1980 Chaikina & Nikolskaya 1970 Mesozoic & Cenozoic Upper Crust 24 Cr 50           ppm Condie 1993 Ordinary Chondrites   Cr/V 50   1         McDonough & Sun 1995 Silicic Precambrian Granulites 24 Cr 50         23 ppm Shaw et al. 1986 Yangtze Craton 24 Cr 50           ppm Gao et al. 1998 Shales 24 Cr 507           ppm Condie 1993 Honshu Basalt 24 Cr 507.53         45 ppm Kelemen et al. 2004 Pelagic Clay 24 Cr 51.7         3 ppm Plank & Langmuir 1998 Paleozoic Upper Crust 24 Cr 52           ppm Condie 1993 Chassigny Meteorite 24 Cr 5240   1050       ppm McSween, Jr. 2004 Lodders 1998 Carbonate Turbidites 24 Cr 53         87 ppm Plank & Langmuir 1998 Late Proterozoic Upper Crust 24 Cr 53           ppm Condie 1993 Ordinary Chondrites   Fe/Cr 53   4         McDonough & Sun 1995 Pelagic Clay 24 Cr 53           ppm Elliot et al. 1997 Pelagic Clay 24 Cr 53.3         6 ppm Plank & Langmuir 1998 Continental Crust 24 Cr 55           ppm Weaver & Tarney 1984 Taylor & McLennan 1981 Enstatite Chondrites   Cr/V 55   5         McDonough & Sun 1995 Island Arcs 24 Cr 55           ppm Taylor & McLennan 1995 Karatau 24 Cr 55         10 ppm Altschuller 1980 Kholodov 1963 Middle Proterozoic Upper Crust 24 Cr 55           ppm Condie 1993 Talkeetna Arc Plutonic Rocks 24 Cr 55   10     7 ppm Kelemen et al. 2004 Radiolarian Clay 24 Cr 55.1         2 ppm Plank & Langmuir 1998 Continental Crust 24 Cr 56           ppm Weaver & Tarney 1984 Continental Crust 24 Cr 56           µg/g Rudnick & Gao 2004 Weaver & Tarney 1984 Oceanic Plateaus 24 Cr 56           ppm Kerr 2004 Tejada et al. 2002 Yangtze Craton 24 Cr 56           ppm Gao et al. 1998 Mesozoic & Cenozoic Extensions 24 Cr 57           ppm Rudnick & Fountain 1995 Island Arc Andesite 24 Cr 575.68         132 ppm Kelemen et al. 2004 Early Proterozoic Upper Crust 24 Cr 59           ppm Condie 1993 Shales   Cr/Th 59.6             Condie 1993 Phanerozoic Flood Basalts 24 Cr 595         7 ppm Farmer 2004 Wooden et al. 1993 Felsic Volcanics 24 Cr 6           ppm Condie 1993 Silicified Limestone 24 Cr 6           ppm Plank & Langmuir 1998 Estherville Mesosiderite 24 Cr 6.08             Mittlefehldt 2004 Mittlefehldt in press Simpson & Ahrens 1977 Talkeetna Arc Plutonic Rocks 24 Cr 6.3   0.4     13 ppm Kelemen et al. 2004 Veramin Mesosiderite 24 Cr 6.68             Mittlefehldt 2004 Mittlefehldt in press Powell 1971 Middle Proterozoic Upper Crust   Cr/Th 6.7             Condie 1993 Acapulcoite Primitive Achondrites 24 Cr 6.995             Mittlefehldt 2004 Yanai & Kojima 1991 Zipfel et al. 1995 Bone Valley Formation 24 Cr 60         8 ppm Altschuller 1980 Oceanic Plateaus 24 Cr 61           ppm Kerr 2004 Tejada et al. 2002 Nankai Trench 24 Cr 61.8           ppm Plank & Langmuir 1998 Pelagic Clay 24 Cr 61.8         55 ppm Plank & Langmuir 1998 Middle Proterozoic Upper Crust 24 Cr 63           ppm Condie 1993 Oceanic Plateaus 24 Cr 63           ppm Kerr 2004 Kerr et al. 1997 Hauff et al. 2000 Makran Trench 24 Cr 64.9           ppm Plank & Langmuir 1998 Lower Continental Crust 24 Cr 65           ppm Shaw et al. 1986 Taylor & McLennan 1981 Yangtze Craton 24 Cr 65           ppm Gao et al. 1998 Carbonaceous Chondrites   Fe/Cr 66   5         McDonough & Sun 1995 Yangtze Craton 24 Cr 66           ppm Gao et al. 1998 Basalts 24 Cr 665         27 ppm Farmer 2004 Farmer et al. 2002 ALH 77005 Meteorite 24 Cr 6670   520       ppm McSween, Jr. 2004 Lodders 1998 Pelagic Clay 24 Cr 67.9         8 ppm Plank & Langmuir 1998 Early Proterozoic Upper Crust 24 Cr 68           ppm Condie 1993 CI Chondrites   Fe/Cr 68.3             McDonough & Sun 1995 Central East China Craton 24 Cr 69           ppm Gao et al. 1998 Middle Continental Crust 24 Cr 69           µg/g Rudnick & Gao 2004 Gao et al. 1998 North Antilles Trench 24 Cr 69           ppm Plank & Langmuir 1998 South Margin of North China Craton 24 Cr 69           ppm Gao et al. 1998 Aleutian Trench 24 Cr 69.2           ppm Plank & Langmuir 1998 Kerm Trench 24 Cr 69.7           ppm Plank & Langmuir 1998 Boninites 24 Cr 696.03         76 ppm Kelemen et al. 2004 Felsic Volcanics 24 Cr 7           ppm Condie 1993 Kyzyl Kum 24 Cr 7         5 ppm Altschuller 1980 Kapustyanski 1964 ALHA77081 Acapulcoite 24 Cr 7.19             Mittlefehldt 2004 Schultz et al. 1982 Early Proterozoic Upper Crust   Cr/Th 7.4             Condie 1993 Shales   Cr/Th 7.7             Condie 1993 Upper Continental Crust   Cr/Sc 7.8             Condie 1993 Frankfort Howardites 24 Cr 7.94             Mittlefehldt 2004 McCarthy et al. 1972 Palme et al. 1978 Graywackes 24 Cr 70           ppm Condie 1993 Orinoco River Particulates 24 Cr 70           µg/g Martin & Meybeck 1979 Java Trench 24 Cr 70.5           ppm Plank & Langmuir 1998 Central East China Craton 24 Cr 71           ppm Gao et al. 1998 Ganges River Particulates 24 Cr 71           µg/g Martin & Meybeck 1979 Tongan Basalts 24 Cr 716.67         9 ppm Kelemen et al. 2004 Enstatite Chondrites   Fe/Cr 72   14         McDonough & Sun 1995 Mississippi River Particulates 24 Cr 72           µg/g Martin & Meybeck 1979 Peninsular Range Batholith 24 Cr 73           ppm Kemp & Hawkesworth 2004 Sylvester 1995 South Margin of North China Craton 24 Cr 73           ppm Gao et al. 1998 Ordinary Chondrites   Fe/Cr 74   4         McDonough & Sun 1995 South Margin of North China Craton 24 Cr 74           ppm Gao et al. 1998 Andesites 24 Cr 75           ppm Condie 1993 Phanerozoic Flood Basalts 24 Cr 75         1 ppm Farmer 2004 Peate 1997 Alaska Trench 24 Cr 75.1           ppm Plank & Langmuir 1998 Diorite 24 Cr 76         260 ppm Gao et al. 1998 Mesozoic & Cenozoic Orogens 24 Cr 76           ppm Rudnick & Fountain 1995 Middle Continental Crust 24 Cr 76   10       µg/g Rudnick & Gao 2004 Middle Continental Crust 24 Cr 76           ppm Kemp & Hawkesworth 2004 Rudnick & Gao 2004 Pelites 24 Cr 76         69 ppm Gao et al. 1998 Upper Continental Crust 24 Cr 76           µg/g Rudnick & Gao 2004 Eade and Fahrig 1973 ALH 84001 Meteorite 24 Cr 7760   670       ppm McSween, Jr. 2004 Lodders 1998 Core 24 Cr 7790           ppm Allegre et al. 1995 Subducted Sediment 24 Cr 78.9   7       ppm Plank & Langmuir 1998 South Margin of North China Craton 24 Cr 79           ppm Gao et al. 1998 South Margin of North China Craton 24 Cr 79           ppm Gao et al. 1998 Carbonates 24 Cr 8         50 ppm Gao et al. 1998 Granites 24 Cr 8           ppm Condie 1993 Shales   Cr/Th 8             Condie 1993 Upper Continental Crust   Cr/Sc 8.4             Condie 1993 MacKenzie River Particulates 24 Cr 8.5           µg/g Martin & Meybeck 1979 Ocean Island Peridotite 24 Cr 8.6           wt% Pearson et al. 2004 Sen 1988 Granites 24 Cr 8.8         1226 ppm Gao et al. 1998 Central East China Craton 24 Cr 80           ppm Gao et al. 1998 Graywackes 24 Cr 80           ppm Condie 1993 Graywackes 24 Cr 80           ppm Condie 1993 Intermediate Mafic Post-Archean Granulites 24 Cr 80 56       79 ppm Rudnick & Fountain 1995 Turbidites 24 Cr 80         4 ppm Plank & Langmuir 1998 Upper Continental Crust 24 Cr 80           µg/g Rudnick & Gao 2004 Gao et al. 1998 South Antilles Trench 24 Cr 80.3           ppm Plank & Langmuir 1998 South Qinling Belt in China 24 Cr 81           ppm Gao et al. 1998 Colorado River Particulates 24 Cr 82           µg/g Martin & Meybeck 1979 Oceanic Plateaus 24 Cr 82           ppm Kerr 2004 Yangtze Craton 24 Cr 82           ppm Gao et al. 1998 Radiolarian Clay 24 Cr 82.2         8 ppm Plank & Langmuir 1998 Radiolarian Clay 24 Cr 82.2         8 ppm Plank & Langmuir 1998 Central East China Craton 24 Cr 83           ppm Gao et al. 1998 Middle Continental Crust 24 Cr 83           ppm Rudnick & Fountain 1995 Middle Continental Crust 24 Cr 83           µg/g Rudnick & Gao 2004 Rudnick & Fountain 1995 Archean Terrains 24 Cr 84           ppm Shaw et al. 1986 Shaw et al. 1967 Interior North China Craton 24 Cr 84           ppm Gao et al. 1998 North Qinling Belt in China 24 Cr 84           ppm Gao et al. 1998 Pelites 24 Cr 85         1341 ppm Gao et al. 1998 Upper Continental Crust 24 Cr 85           µg/g Rudnick & Gao 2004 Taylor & McLennan 1985 Taylor & McLennan 1995 Central East China Craton 24 Cr 86           ppm Gao et al. 1998 Archean Canadian Shield 24 Cr 88           ppm Shaw et al. 1986 Eade & Fahrig 1971 Archean Lower Crust 24 Cr 88           ppm Shaw et al. 1986 Weaver & Tarney 1984 Granulites 24 Cr 88           ppm Weaver & Tarney 1984 Weaver & Tarney 1982 Greywackes 24 Cr 88           ppm Wedepohl 1995 Lower Continental Crust 24 Cr 88           µg/g Rudnick & Gao 2004 Weaver & Tarney 1984 Carbonates 24 Cr 9         2038 ppm Gao et al. 1998 Felsic Volcanics 24 Cr 9           ppm Condie 1993 Continental Crust 24 Cr 90           µg/g Rudnick & Gao 2004 Shaw et al. 1986 Continental Crust 24 Cr 90           ppm Shaw et al. 1986 Enstatite Chondrites   Fe/Cr 90   6         McDonough & Sun 1995 Interior North China Craton 24 Cr 90           ppm Gao et al. 1998 Marine Pelagic Clay 24 Cr 90           ppm Li 1991 Turekian & Wedepohl 1961 Marine Pelagic Clay 24 Cr 90           ppm Li 1982 Marine Shales 24 Cr 90           ppm Altschuller 1980 Turekian & Wedepohl 1961 Marine Shales 24 Cr 90           ppm Li 1991 Turekian & Wedepohl 1961 Parana River Particulates 24 Cr 90           µg/g Martin & Meybeck 1979 Tamalyk Krasnoyarsk 24 Cr 90         38 ppm Altschuller 1980 Chaikina & Nikolskaya 1970 Core 24 Cr 9000           µg/g McDonough 1998 Central East China Craton 24 Cr 92           ppm Gao et al. 1998 Continental Crust 24 Cr 92           µg/g Rudnick & Gao 2004 Gao et al. 1998a East China Craton 24 Cr 92           ppm Gao et al. 1998 Upper Continental Crust 24 Cr 92           µg/g Rudnick & Gao 2004 Upper Continental Crust 24 Cr 92   17       µg/g Rudnick & Gao 2004 see text Upper Continental Crust 24 Cr 92           ppm Kemp & Hawkesworth 2004 Rudnick & Gao 2004 Andesites 24 Cr 92.8         50 ppm Plank & Langmuir 1998 Plank & Langmuir 1988 Cascadia Trench 24 Cr 94           ppm Plank & Langmuir 1998 Clastic Turbidites 24 Cr 94         28 ppm Plank & Langmuir 1998 Phanerozoic Flood Basalts 24 Cr 94         1 ppm Farmer 2004 Peate 1997 Green Clay 24 Cr 94.9         3 ppm Plank & Langmuir 1998 North Qinling Belt in China 24 Cr 95           ppm Gao et al. 1998 Oceanic Plateaus 24 Cr 95           ppm Kerr 2004 Mahoney et al. 1995 Philip Trench 24 Cr 95.8           ppm Plank & Langmuir 1998 Silty Mud 24 Cr 95.9         16 ppm Plank & Langmuir 1998 QUE 94201 Meteorite 24 Cr 950   85       ppm McSween, Jr. 2004 Lodders 1998 Mexico Trench 24 Cr 97.1           ppm Plank & Langmuir 1998 Lesser Antilles Basalt 24 Cr 974.55         47 ppm Kelemen et al. 2004 Basalts 24 Cr 99         5 ppm Farmer 2004 Wilson et al. 1997 Interior North China Craton 24 Cr 99           ppm Gao et al. 1998 South Qinling Belt in China 24 Cr 99           ppm Gao et al. 1998 Brown Clay 24 Cr 99.3         29 ppm Plank & Langmuir 1998 Core 24 Cr       0.8 0.95   wt% McDonough & Sun 1995 Core   Cr/Mn       1.8 1.8     McDonough & Sun 1995 Core   Cr/V       67 79     McDonough & Sun 1995 Core   Fe/Cr       98 92     McDonough & Sun 1995 Garnet Peridotites 24 Cr   0.35         wt%ox McDonough 1991 Maaloe & Aoki 1975 Jordan 1979 Boyd 1989 McDonough 1990 Periodotite Section in Ophiolites 24 Cr   0.37         wt%ox McDonough 1991 Phosphoria Formation 24 Cr   1000         ppm Gulbrandsen 1966 Primitive Mantle 24 Cr   0.38         wt%ox McDonough 1991 McDonough & Frey 1989 Sun 1982 Solid Earth 24 Cr       0.44 0.49   wt% McDonough & Sun 1995 Solid Earth   Cr/Mn       2 2     McDonough & Sun 1995 Solid Earth   Cr/V       46 52     McDonough & Sun 1995 Solid Earth   Fe/Cr       68 67     McDonough & Sun 1995 Spinel Peridotites 24 Cr   0.39         wt%ox McDonough 1991 Maaloe & Aoki 1975 Jordan 1979 Boyd 1989 McDonough 1990 Ureilite Primitive Achondrites 24 Cr       0.66 0.79   wt%ox Boynton et al. 1976 Mason 1971