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)
Fresh Mid-Ocean Ridge Basalts   143Nd/144Nd 0.5134             Isotopic compositions of Depleted Mantle (DM) according to Neodymium isotopic values from the 'All MORB' data compilation.  To achieve an average isotopic composition of the Depleted Mantle the PetDB database was utilized. All eruptive products from mid-ocean spreading centers were compiled and filtered to include only samples that were erupted in water depths in excess of 2000 m.  All samples that contained more than 55 wt.% SiO2 were excluded as well. Samples with non-smooth REE patterns were excluded wherever applicable.  With these minimal steps of filtering, this ensures that at least part of the plume influenced basalts are excluded.    Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts   143Nd/144Nd 0.5131         90   Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   176Hf/177Hf 0.28328             Isotopic compositions of Depleted Mantle (DM) according to Hafnium isotopic values from the 'All MORB' data compilation.  To achieve an average isotopic composition of the Depleted Mantle the PetDB database was utilized. All eruptive products from mid-ocean spreading centers were compiled and filtered to include only samples that were erupted in water depths in excess of 2000 m.  All samples that contained more than 55 wt.% SiO2 were excluded as well. Samples with non-smooth REE patterns were excluded wherever applicable.  With these minimal steps of filtering, this ensures that at least part of the plume influenced basalts are excluded.    Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts   206Pb/204Pb 18.38         86   Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   207Pb/204Pb 15.5         86   Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   208Pb/204Pb 37.9             Isotopic compositions of Depleted Mantle (DM) according to Lead isotopic values from the 'All MORB' data compilation.  To achieve an average isotopic composition of the Depleted Mantle the PetDB database was utilized. All eruptive products from mid-ocean spreading centers were compiled and filtered to include only samples that were erupted in water depths in excess of 2000 m.  All samples that contained more than 55 wt.% SiO2 were excluded as well. Samples with non-smooth REE patterns were excluded wherever applicable.  With these minimal steps of filtering, this ensures that at least part of the plume influenced basalts are excluded.    Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts   208Pb/204Pb 38.01         86   Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   226Ra/230Th 10             Isotopic analyses from axial MORB samples from the East Pacific Rise located 13-23¿S at a depth of 2,600-2,900m.  These analyses are taken from Rubin and McDougall 1988 & 1990. Elliott & Spiegelman 2004 Rubin & Macdougall 1988
Rubin & Macdougall 1990
Fresh Mid-Ocean Ridge Basalts   226Ra/230Th 6             Isotopic analyses from axial MORB samples from the Mid-Atlantic Ridge located at 33¿S at a depth of 3,500 and 2,700m.  These analyses are taken from Lundstrom et al. 1998a. Elliott & Spiegelman 2004 Lundstrom et al. 1998a
Fresh Mid-Ocean Ridge Basalts   226Ra/230Th 1             Isotopic analyses from axial MORB samples from the Mid-Atlantic Ridge (specifically the FAZAR area) located at  37-41¿N at a depth of 950-3,000m.  These analyses are taken from Bourdon et al. 1996a,b, 2000. Elliott & Spiegelman 2004 Bourdon et al. 1996a
Bourdon et al. 1996b
Bourdon et al. 2000
Fresh Mid-Ocean Ridge Basalts   226Ra/230Th 7             Isotopic analyses from axial MORB samples from the Mid-Atlantic Ridge (specifically the Reykjanes Ridge) located at  57-63¿N at a depth of 600-1,825m.  These analyses are taken from Peate et al. 2001. Elliott & Spiegelman 2004 Peate et al. 2001
Fresh Mid-Ocean Ridge Basalts   226Ra/230Th 6             Isotopic analyses from axial MORB samples from the East Pacific Rise located 26-28¿S and 35¿S at a depth of 2,450m.  These analyses are taken from Rubin and McDougall 1988 & 1990. Elliott & Spiegelman 2004 Rubin & Macdougall 1988
Rubin & Macdougall 1990
Fresh Mid-Ocean Ridge Basalts   226Ra/230Th 23             Isotopic analyses from axial MORB samples from the East Pacific Rise as well as the Siqueiros transform located 8-10¿N at a depth of 2,600m.  These analyses are taken from various sources. Elliott & Spiegelman 2004 Volpe & Goldstein 1993
Lundstrom et al. 1999
Sims et al. 2002
Fresh Mid-Ocean Ridge Basalts   226Ra/230Th 10             Isotopic analyses from axial MORB samples from the East Pacific Rise located 11-13¿N at a depth of 2,600m.  These analyses are taken from various sources. Elliott & Spiegelman 2004 Rubin & Macdougall 1988
Reinitz & Turekian 1989
BenOthman & Allegre 1990
Goldstein et al. 1991
Goldstein et al. 1993
Fresh Mid-Ocean Ridge Basalts   226Ra/230Th 1             Isotopic analyses from axial MORB samples from the East Pacific Rise located 20-21¿N at a depth of 2,600m.  These analyses are taken from various sources. Elliott & Spiegelman 2004 Newman et al. 1983
Rubin & Macdougall 1988
Rubin & Macdougall 1990
Fresh Mid-Ocean Ridge Basalts   226Ra/230Th 4             Isotopic analyses from axial MORB samples from Gorda Ridge located 41-42¿N at a depth of 3,000m.  These analyses are taken from various sources. Elliott & Spiegelman 2004 Goldstein et al. 1991
Goldstein et al. 1993
Volpe & Goldstein 1993
Cooper et al. 2003
Fresh Mid-Ocean Ridge Basalts   226Ra/230Th 5             Isotopic analyses from axial MORB samples from Juan de Fuca ridge located 44-48¿ N at a depth of 2,200 m.  These analyses are taken from various sources. Elliott & Spiegelman 2004 Goldstein et al. 1991
Goldstein et al. 1993
Volpe & Goldstein 1993
Lundstrom et al. 1995
Fresh Mid-Ocean Ridge Basalts   230Th/238U 2             Isotopic analyses from axial MORB samples from the East Pacific Rise located 26-28¿S and 35¿S at a depth of 2,450m.  These analyses are taken from Rubin and McDougall 1988 & 1990. Elliott & Spiegelman 2004 Rubin & Macdougall 1988
Rubin & Macdougall 1990
Fresh Mid-Ocean Ridge Basalts   230Th/238U 2             Isotopic analyses from axial MORB samples from the Australian-Antarctic Discordance (AAD) located at 50¿S and at a depth of 4,200m.  These analyses are taken from Bourdon et al. 1996b. Elliott & Spiegelman 2004 Bourdon et al. 1996b
Fresh Mid-Ocean Ridge Basalts   230Th/238U 7             Isotopic analyses from axial MORB samples from the Mid-Atlantic Ridge (specifically the Reykjanes Ridge) located at  57-63¿N at a depth of 600-1,825m.  These analyses are taken from Peate et al. 2001. Elliott & Spiegelman 2004 Peate et al. 2001
Fresh Mid-Ocean Ridge Basalts   230Th/238U 23             Isotopic analyses from axial MORB samples from the Mid-Atlantic Ridge (specifically the FAZAR area) located at  37-41¿N at a depth of 950-3,000m.  These analyses are taken from Bourdon et al. 1996a,b, 2000. Elliott & Spiegelman 2004 Bourdon et al. 1996a
Bourdon et al. 1996b
Bourdon et al. 2000
Fresh Mid-Ocean Ridge Basalts   230Th/238U 3             Isotopic analyses from axial MORB samples from the Mid-Atlantic Ridge (specifically the FAMOUS location) located at  36¿50'N at a depth of 2,550m.  These analyses are taken from Condomines et al. 1981. Elliott & Spiegelman 2004 Condomines et al. 1981
Fresh Mid-Ocean Ridge Basalts   230Th/238U 2             Isotopic analyses from axial MORB samples from the Mid-Atlantic Ridge located at 29-30¿N at a depth of 3,300-4,000m.  These analyses are taken from Bourdon et al. 1996b. Elliott & Spiegelman 2004 Bourdon et al. 1996b
Fresh Mid-Ocean Ridge Basalts   230Th/238U 13             Isotopic analyses from axial MORB samples from Juan de Fuca ridge located 44-48¿ N at a depth of 2,200 m.  These analyses are taken from various sources. Elliott & Spiegelman 2004 Goldstein et al. 1991
Goldstein et al. 1993
Volpe & Goldstein 1993
Lundstrom et al. 1995
Fresh Mid-Ocean Ridge Basalts   230Th/238U 40             Isotopic analyses from axial MORB samples from the East Pacific Rise as well as the Siqueiros transform located 8-10¿N at a depth of 2,600m.  These analyses are taken from various sources. Elliott & Spiegelman 2004 Volpe & Goldstein 1993
Lundstrom et al. 1999
Sims et al. 2002
Fresh Mid-Ocean Ridge Basalts   230Th/238U 6             Isotopic analyses from axial MORB samples from the East Pacific Rise located 11-13¿N at a depth of 2,600m.  These analyses are taken from various sources. Elliott & Spiegelman 2004 Rubin & Macdougall 1988
Reinitz & Turekian 1989
BenOthman & Allegre 1990
Goldstein et al. 1991
Goldstein et al. 1993
Fresh Mid-Ocean Ridge Basalts   230Th/238U 6             Isotopic analyses from axial MORB samples from the East Pacific Rise located 20-21¿N at a depth of 2,600m.  These analyses are taken from various sources. Elliott & Spiegelman 2004 Newman et al. 1983
Rubin & Macdougall 1988
Rubin & Macdougall 1990
Fresh Mid-Ocean Ridge Basalts   230Th/238U 9             Isotopic analyses from axial MORB samples from Gorda Ridge located 41-42¿N at a depth of 3,000m.  These analyses are taken from various sources. Elliott & Spiegelman 2004 Goldstein et al. 1991
Goldstein et al. 1993
Volpe & Goldstein 1993
Cooper et al. 2003
Fresh Mid-Ocean Ridge Basalts   230Th/238U 6             Isotopic analyses from axial MORB samples from the Mid-Atlantic Ridge located at 33¿S at a depth of 3,500 and 2,700m.  These analyses are taken from Lundstrom et al. 1998a. Elliott & Spiegelman 2004 Lundstrom et al. 1998a
Fresh Mid-Ocean Ridge Basalts   231Pa/235U 1             Isotopic analyses from axial MORB samples from the Mid-Atlantic Ridge (specifically the FAZAR area) located at  37-41¿N at a depth of 950-3,000m.  These analyses are taken from Bourdon et al. 1996a,b, 2000. Elliott & Spiegelman 2004 Bourdon et al. 1996a
Bourdon et al. 1996b
Bourdon et al. 2000
Fresh Mid-Ocean Ridge Basalts   231Pa/235U 20             Isotopic analyses from axial MORB samples from the East Pacific Rise as well as the Siqueiros transform located 8-10¿N at a depth of 2,600m.  These analyses are taken from various sources. Elliott & Spiegelman 2004 Volpe & Goldstein 1993
Lundstrom et al. 1999
Sims et al. 2002
Fresh Mid-Ocean Ridge Basalts   231Pa/235U 4             Isotopic analyses from axial MORB samples from Gorda Ridge located 41-42¿N at a depth of 3,000m.  These analyses are taken from various sources. Elliott & Spiegelman 2004 Goldstein et al. 1991
Goldstein et al. 1993
Volpe & Goldstein 1993
Cooper et al. 2003
Fresh Mid-Ocean Ridge Basalts   231Pa/235U 5             Isotopic analyses from axial MORB samples from Juan de Fuca ridge located 44-48¿ N at a depth of 2,200 m.  These analyses are taken from various sources. Elliott & Spiegelman 2004 Goldstein et al. 1991
Goldstein et al. 1993
Volpe & Goldstein 1993
Lundstrom et al. 1995
Fresh Mid-Ocean Ridge Basalts   231Pa/235U 6             Isotopic analyses from axial MORB samples from the Mid-Atlantic Ridge located at 33¿S at a depth of 3,500 and 2,700m.  These analyses are taken from Lundstrom et al. 1998a. Elliott & Spiegelman 2004 Lundstrom et al. 1998a
Fresh Mid-Ocean Ridge Basalts   87Sr/86Sr 0.70274         104   Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   87Sr/86Sr 0.7027             Isotopic compositions of Depleted Mantle (DM) according to Strontium isotopic values from the 'All MORB' data compilation.  To achieve an average isotopic composition of the Depleted Mantle the PetDB database was utilized. All eruptive products from mid-ocean spreading centers were compiled and filtered to include only samples that were erupted in water depths in excess of 2000 m.  All samples that contained more than 55 wt.% SiO2 were excluded as well. Samples with non-smooth REE patterns were excluded wherever applicable.  With these minimal steps of filtering, this ensures that at least part of the plume influenced basalts are excluded.    Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts 13 Al 15.97         203 wt% Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 13 Al 4.49           wt% Composition of the Earth's Mantle as based on bulk composition of upper mantle rocks. Palme & O'Neill 2004
Fresh Mid-Ocean Ridge Basalts 56 Ba 10           ppm Barium concentration found in Basalts in ppm. Concentration values were calculated by Isotope dilution mass spectrometry at MIT campus. Edmond et al. 1979
Fresh Mid-Ocean Ridge Basalts 56 Ba 30.7         44 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   Ba/Rb   11.44 0.19     142   Hofmann & White 1983
Fresh Mid-Ocean Ridge Basalts   Ba/Th 86.04             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts 6 C 11.26             Compositional analyses of Transitional Mid-Ocean Ridge Basalt obtained by direct sampling of hot gas vents at Erta 'Ale Volcano 1974. Based on the geology of this region the volatile levels are consistent with those of any subducted continental margin.  Carbon in this particular case is given as CO2. Oppenheimer 2004 Symonds et al. 1994
Fresh Mid-Ocean Ridge Basalts 6 C       50 400   ppm Averages of typical pre-eruptive volatile abundances in magmas of MORB settings.  The values reported are generally for the melt phase (dissolved). Oppenheimer 2004 Johnson et al. 1993
Wallace & Anderson 2000
Fresh Mid-Ocean Ridge Basalts 20 Ca 8.5             Calcium concentration found in Basalts, which is compared to the value obtained at the Galapagos. Calcium concentrations were obtained via EGTA/EDTA titration, electrometric endpoint, Hg electrode at MIT. Edmond et al. 1979
Fresh Mid-Ocean Ridge Basalts 20 Ca 11.85         203 wt% Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 20 Ca 3.65           wt% Composition of the Earth's Mantle as based on bulk composition of upper mantle rocks. Palme & O'Neill 2004
Fresh Mid-Ocean Ridge Basalts 58 Ce 11.46         62 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   Ce/Nd 1.21             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts   Ce/P 0.19             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts   Ce/Pb 22.36             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts 17 Cl 45           ppm Edmond et al. 1979
Fresh Mid-Ocean Ridge Basalts 17 Cl       20 50   ppm Averages of typical pre-eruptive volatile abundances in magmas of MORB settings.  The values reported are generally for the melt phase (dissolved). Oppenheimer 2004 Johnson et al. 1993
Wallace & Anderson 2000
Fresh Mid-Ocean Ridge Basalts 27 Co 0.44             Compositional analyses of Transitional Mid-Ocean Ridge Basalt obtained by direct sampling of hot gas vents at Erta 'Ale Volcano 1974. Based on the geology of this region the volatile levels are consistent with those of any subducted continental margin.  Carbon in this particular case is given as CO. Oppenheimer 2004 Symonds et al. 1994
Fresh Mid-Ocean Ridge Basalts 27 Co 41.76         33 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 24 Cr 357.1         48 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 55 Cs 0.05         6 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   Cs/Rb 0.015             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts 29 Cu 69.87         30 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 66 Dy 4.7         25 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 68 Er 3         29 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 63 Eu 1.13         66 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 9 F 100           ppm Edmond et al. 1979
Fresh Mid-Ocean Ridge Basalts 9 F       100 600   ppm Averages of typical pre-eruptive volatile abundances in magmas of MORB settings.  The values reported are generally for the melt phase (dissolved). Oppenheimer 2004 Johnson et al. 1993
Wallace & Anderson 2000
Fresh Mid-Ocean Ridge Basalts 26 Fe 8.85         203 wt% Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 26 Fe 8.1           wt% Composition of the Earth's Mantle as based on bulk composition of upper mantle rocks. Palme & O'Neill 2004
Fresh Mid-Ocean Ridge Basalts 64 Gd 4.04         27 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 1 H 77.24             Compositional analyses of Transitional Mid-Ocean Ridge Basalt obtained by direct sampling of hot gas vents at Erta 'Ale Volcano 1974. Based on the geology of this region the volatile levels are consistent with those of any subducted continental margin.  Hydrogen in this particular value is given as H2O. Oppenheimer 2004 Symonds et al. 1994
Fresh Mid-Ocean Ridge Basalts 1 H 1.39             Compositional analyses of Transitional Mid-Ocean Ridge Basalt obtained by direct sampling of hot gas vents at Erta 'Ale Volcano 1974. Based on the geology of this region the volatile levels are consistent with those of any subducted continental margin.  Hydrogen in this particular value is given as H2 (Pure Hydrogen Gas Emissions). Oppenheimer 2004 Symonds et al. 1994
Fresh Mid-Ocean Ridge Basalts 1 H 0.68             Compositional analyses of Transitional Mid-Ocean Ridge Basalt obtained by direct sampling of hot gas vents at Erta 'Ale Volcano 1974. Based on the geology of this region the volatile levels are consistent with those of any subducted continental margin.  Hydrogen in this particular case is given as H2S gas. Oppenheimer 2004 Symonds et al. 1994
Fresh Mid-Ocean Ridge Basalts 1 H 0.42             Compositional analyses of Transitional Mid-Ocean Ridge Basalt obtained by direct sampling of hot gas vents at Erta 'Ale Volcano 1974. Based on the geology of this region the volatile levels are consistent with those of any subducted continental margin.  Hydrogen in this particular case is given as HCl. Oppenheimer 2004 Symonds et al. 1994
Fresh Mid-Ocean Ridge Basalts 1 H       0.4 0.5   wt% Averages of typical pre-eruptive volatile abundances in magmas of MORB settings.  The values reported are generally for the melt phase (dissolved). Oppenheimer 2004 Johnson et al. 1993
Wallace & Anderson 2000
Fresh Mid-Ocean Ridge Basalts 1 H       0.1 0.2   wt% Averages of typical pre-eruptive volatile abundances in magmas of MORB settings.  The values reported are generally for the melt phase (dissolved). Oppenheimer 2004 Johnson et al. 1993
Wallace & Anderson 2000
Fresh Mid-Ocean Ridge Basalts 1 H 1.5           wt% Averages of typical pre-eruptive volatile abundances in magmas of MORB settings. This particular value is that of Enriched Mid-Ocean Ridge Basalt (E-MORB). The values reported are generally for the melt phase (dissolved). Oppenheimer 2004 Johnson et al. 1993
Wallace & Anderson 2000
Fresh Mid-Ocean Ridge Basalts 72 Hf       0.28304 0.283311     Range in 176 to 177 Hf ratio as shown in 'normal' ridge segments, which is show to be a more defined/limited range of values. Nowell et al. 1998
Fresh Mid-Ocean Ridge Basalts 72 Hf 2.31         41 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 67 Ho 0.93         6 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 19 K 1160           ppm Potassium concentration as seen in Basalts. These values are mainly given as a comparison to those concentrations obtained in the hydrothermal ridge crest study. Values obtained according to Microgravimetry as the tetra phenyl borate on pre weighed Nucleopore filters at MIT. Edmond et al. 1979
Fresh Mid-Ocean Ridge Basalts 19 K 0.16         203 wt% Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   K/U 14674             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts 57 La 4.13         59 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   La/Ce 0.3565             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts   La/Nb 1.2             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts 3 Li 10           ppm Lithium concentration as found in basalts, given for comparison to concentrations obtained during the Galapagos study. Considered a cyclic salt due to its input and impending uptake during low temperature alteration of the oceanic crust. Range values obtained according to Atomic Absorption Spectroscopy with internal additions performed at MIT. Edmond et al. 1979
Fresh Mid-Ocean Ridge Basalts 71 Lu 0.41         40 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 12 Mg 5             Magnesium concentration of Basalts. All values determined via EGTA/EDTA titration, electrometric endpoint, Hg electrode at MIT. Edmond et al. 1979
Fresh Mid-Ocean Ridge Basalts 12 Mg 8.57         203 wt% Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 12 Mg 36.77           wt% Composition of the Earth's Mantle as based on bulk composition of upper mantle rocks. Palme & O'Neill 2004
Fresh Mid-Ocean Ridge Basalts   Mg# 63.23         203   Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 25 Mn 0.16         203 wt% Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 11 Na 2.57         203 wt% Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 41 Nb 6.04         20 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   Nb/Ta 14.73             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts   Nb/U 45.74             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts 60 Nd 9.3         60 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   Nd/Pr 5.13             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts 28 Ni 135.24         46 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 15 P 0.14         203 wt% Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 82 Pb 0.38         14 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 59 Pr 1.84         6 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 37 Rb 1.11           ppm Rubidium concentration as is found in Basalts. Values obtained according to Isotope dilution mass spectrometry and compared to the range from the Galapagos study for Rb values in the ocean. Edmond et al. 1979
Fresh Mid-Ocean Ridge Basalts 37 Rb 2.93         33 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   Rb/Ba 0.0874             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts 16 S       800 1500   ppm Averages of typical pre-eruptive volatile abundances in magmas of MORB settings.  The values reported are generally for the melt phase (dissolved). Oppenheimer 2004 Johnson et al. 1993
Wallace & Anderson 2000
Fresh Mid-Ocean Ridge Basalts 16 S 0.21             Compositional analyses of Transitional Mid-Ocean Ridge Basalt obtained by direct sampling of hot gas vents at Erta 'Ale Volcano 1974. Based on the geology of this region the volatile levels are consistent with those of any subducted continental margin.  Sulfur in this particular case is given as S2 gas. Oppenheimer 2004 Symonds et al. 1994
Fresh Mid-Ocean Ridge Basalts 16 S 8.34             Compositional analyses of Transitional Mid-Ocean Ridge Basalt obtained by direct sampling of hot gas vents at Erta 'Ale Volcano 1974. Based on the geology of this region the volatile levels are consistent with those of any subducted continental margin.  Sulfur in this particular case is given as SO2 gas. Oppenheimer 2004 Symonds et al. 1994
Fresh Mid-Ocean Ridge Basalts 16 S 800           ppm Edmond et al. 1979
Fresh Mid-Ocean Ridge Basalts 21 Sc 36.75         45 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 14 Si 50.7             Edmond et al. 1979
Fresh Mid-Ocean Ridge Basalts 14 Si 50.51         203 wt% Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 14 Si 45.4           wt% Composition of the Earth's Mantle as based on bulk composition of upper mantle rocks. Palme & O'Neill 2004
Fresh Mid-Ocean Ridge Basalts 62 Sm 2.96         66 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   Sm/Hf 1.32             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts 38 Sr 141.42         55 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   Sr/Nd 11.88             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts 73 Ta 0.31         28 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 65 Tb 0.68         42 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 90 Th 0.28         34 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   Th/U 3.26             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts 22 Ti 1.22         203 wt% Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   Ti/Gd 1937             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts 69 Tm 0.47         4 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 92 U 0.23         26 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 23 V 245.77         39 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 39 Y 27.48         46 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   Y/Yb 10.07             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
Fresh Mid-Ocean Ridge Basalts 70 Yb 2.72         62 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts 30 Zn 67.27         30 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   Zn/Cd   125900 2400     137   Hofmann & White 1983
Fresh Mid-Ocean Ridge Basalts 40 Zr 92.63         54 ppm Average major and trace element values for Primitive MORB given in weight percent and parts per million respectively. Kelemen et al. 2004
Fresh Mid-Ocean Ridge Basalts   Zr/Hf 39.03             Constant' ratios in MORB as taken from the 'All MORB' data set according to Salters and Stracke 2003.  The 'All MORB' data set is a compilation of 639 sample ratios to represent the MORB composition.  In using these values and applying a simple mathematical process order to remove the outliers, which are found by calculating the upper and lower quartile range, then applying the outlier criterion (explained in Salters and Stracke 2003 pg.7).  In addition to this method all the samples with La > 5 ppm were rejected.  This, much like with the tests and criteria of the D-MORB values, is a method of removing low degree melts from the MORB data in order to come closer to a value for Depleted Mantle.  Salters & Stracke 2004
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