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 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 MORB in Atlantic Ocean   143Nd/144Nd 0.5132277   0.000218132 0.513095 0.514132 20   Average value for Nd isotopes as found in MORB and NAIP samples taken from 20 different Atlantic localities. These values are averaged over Atlantic Ocean MORB and NAIP values given in table 2 and appendix 1 of this particular reference (2622) without consideration of the standard deviation given by the authors according to these 20 values.  Values as found in the Carribean Sea were also not taken into consideration in this particular average of values. For latitude and longitude of samples used as well as sample numbers/names please see the actual values as printed in both Table 2 and Appendix 1 of Nowell et al.  Nowell et al. 1998 White & Hofmann 1982
O'Nions et al. 1977
Salters & Hart 1991
White 1979
Salters 1996
Fresh MORB in Atlantic Ocean   143Nd/144Nd 0.5132277   0.000218132 0.513095 0.514132 20   Average value for Nd isotopes as found in MORB and NAIP samples taken from 20 different Atlantic localities. These values are averaged over Atlantic Ocean MORB and NAIP values given in table 2 and appendix 1 of this particular reference (2622) without consideration of the standard deviation given by the authors according to these 20 values.  Values as found in the Carribean Sea were also not taken into consideration in this particular average of values. For latitude and longitude of samples used as well as sample numbers/names please see the actual values as printed in both Table 2 and Appendix 1 of Nowell et al.  Nowell et al. 1998
Fresh MORB in Atlantic Ocean   176Hf/177Hf 0.283211545   6.89104e-05 0.283063 0.283311 22   Average value for Hf isotopes as found in MORB and NAIP samples taken from 22 different Atlantic localities. These values are averaged over Atlantic Ocean MORB and NAIP values given in table 2 and appendix 1 of this particular reference (2622) without consideration of the standard deviation given by the authors according to these 22 values.  Values as found in the Carribean Sea were also not taken into consideration in this particular average of values. For latitude and longitude of samples used as well as sample numbers/names please see the actual values as printed in both Table 2 and Appendix 1 of Nowell et al.  Nowell et al. 1998
Fresh MORB in Atlantic Ocean   176Hf/177Hf 0.283211545   6.89104e-05 0.283063 0.283311 22   Average value for Hf isotopes as found in MORB and NAIP samples taken from 22 different Atlantic localities. These values are averaged over Atlantic Ocean MORB and NAIP values given in table 2 and appendix 1 of this particular reference (2622) without consideration of the standard deviation given by the authors according to these 22 values.  Values as found in the Carribean Sea were also not taken into consideration in this particular average of values. For latitude and longitude of samples used as well as sample numbers/names please see the actual values as printed in both Table 2 and Appendix 1 of Nowell et al.  Nowell et al. 1998 Patchett 1983
Patchett & Tatsumoto 1980
Salters & Hart 1991
Blichert-Toft et al. 1997
Salters 1996

Fresh MORB in Atlantic Ocean   e-Hf 15.135   0.799030663 14.57 15.7 2   Average eHf value calculated from the multiple values for eHf given in Table 2 of Nowell et al. 1998.  The average is taken from eHf values from samples taken from 2 different localities in the Atlantic Ocean.  For actual sample information and individual values for those samples please see Table 2 of Nowell et al. 1998 (Ref. No. 2622 in Earth Ref Reference Database). Nowell et al. 1998
Fresh MORB in Atlantic Ocean   e-Nd 9.08   0.509116882 8.72 9.44 2   Average eNd value calculated from the multiple values for eNd given in Table 2 of Nowell et al. 1998.  The average is taken from eNd values from samples taken from 2 different localities in the Indian Ocean along the Southwest Indian Ridge. For actual sample information and individual values for those samples please see Table 2 of Nowell et al. 1998 (Ref. No. 2622 in Earth Ref Reference Database). Nowell et al. 1998
Fresh MORB in Atlantic Ocean   e-Nd 10.605   0.360624458 10.35 10.86 2   Average eNd value calculated from the multiple values for eNd given in Table 2 of Nowell et al. 1998.  The average is taken from eNd values from samples taken from 2 different localities in the Atlantic Ocean along the Mid Atlantic Ridge.  For actual sample information and individual values for those samples please see Table 2 of Nowell et al. 1998 (Ref. No. 2622 in Earth Ref Reference Database). Nowell et al. 1998
Fresh MORB in Atlantic Ocean   e-Nd 10.53222222   0.875125388 9.21 11.35 9   Average eNd value calculated from the multiple values for eNd given in Table 2 of Nowell et al. 1998.  The average is taken from eNd values from samples taken from 9 different localities in the Pacific Ocean along the East Pacific Rise (EPR).  For actual sample information and individual values for those samples please see Table 2 of Nowell et al. 1998 (Ref. No. 2622 in Earth Ref Reference Database). Nowell et al. 1998
Fresh MORB in Indian Ocean   143Nd/144Nd 0.513031   6.33777e-05 0.512917 0.513122 12   Average value for Nd isotopes as found in MORB and NAIP samples taken from 12 different Indian Ocean localities. These values are averaged over Indian Ocean MORB and NAIP values given in table 2 and appendix 1 of this particular reference (2622) without consideration of the standard deviation given by the authors according to these 12 values.  For latitude and longitude of samples used as well as sample numbers/names please see the actual values as printed in both Table 2 and Appendix 1 of Nowell et al.  Nowell et al. 1998 Salters 1996
Fresh MORB in Indian Ocean   143Nd/144Nd 0.513031   6.33777e-05 0.512917 0.513122 12   Average value for Nd isotopes as found in MORB and NAIP samples taken from 12 different Indian Ocean localities. These values are averaged over Indian Ocean MORB and NAIP values given in table 2 and appendix 1 of this particular reference (2622) without consideration of the standard deviation given by the authors according to these 12 values.  For latitude and longitude of samples used as well as sample numbers/names please see the actual values as printed in both Table 2 and Appendix 1 of Nowell et al.  Nowell et al. 1998
Fresh MORB in Indian Ocean   176Hf/177Hf 0.283209583   4.77978e-05 0.283129 0.283298 12   Average value for Hf isotopes as found in MORB and NAIP samples taken from 12 different Indian Ocean localities along the South West Indian Ridge. These values are averaged over Indian Ocean MORB and NAIP values given in table 2 and appendix 1 of this particular reference (2622: Nowell et al. 1998) without consideration of the standard deviation given by the authors according to these 12 values.   For latitude and longitude of samples used as well as sample numbers/names please see the actual values as printed in both Table 2 and Appendix 1 of Nowell et al. 1998. Nowell et al. 1998 Salters 1996
Fresh MORB in Indian Ocean   176Hf/177Hf 0.283209583   4.77978e-05 0.283129 0.283298 12   Average value for Hf isotopes as found in MORB and NAIP samples taken from 12 different Indian Ocean localities along the South West Indian Ridge. These values are averaged over Indian Ocean MORB and NAIP values given in table 2 and appendix 1 of this particular reference (2622: Nowell et al. 1998) without consideration of the standard deviation given by the authors according to these 12 values.   For latitude and longitude of samples used as well as sample numbers/names please see the actual values as printed in both Table 2 and Appendix 1 of Nowell et al. 1998. Nowell et al. 1998
Fresh MORB in Indian Ocean   e-Hf 13.405   0.954594155 12.73 14.08 2   Average eHf value calculated from the multiple values for eHf given in Table 2 of Nowell et al. 1998.  The average is taken from eHf values from samples taken from 2 different localities in the Indian Ocean along the Southwest Indian Ridge.  For actual sample information and individual values for those samples please see Table 2 of Nowell et al. 1998 (Ref. No. 2622 in Earth Ref Reference Database). Nowell et al. 1998
Fresh MORB in Pacific Ocean   143Nd/144Nd 0.513180833   4.01063e-05 0.51311 0.51322 12   Average value for Nd isotopes as found in MORB and NAIP samples taken from 12 different Pacific localities. These values are averaged over Pacific Ocean MORB and NAIP values given in table 2 and appendix 1 of this particular reference (2622) without consideration of the standard deviation given by the authors according to these 12 values.  For latitude and longitude of samples used as well as sample numbers/names please see the actual values as printed in both Table 2 and Appendix 1 of Nowell et al.  Nowell et al. 1998 White & Hofmann 1982
Fresh MORB in Pacific Ocean   143Nd/144Nd 0.513180833   4.01063e-05 0.51311 0.51322 12   Average value for Nd isotopes as found in MORB and NAIP samples taken from 12 different Pacific localities. These values are averaged over Pacific Ocean MORB and NAIP values given in table 2 and appendix 1 of this particular reference (2622) without consideration of the standard deviation given by the authors according to these 12 values.  For latitude and longitude of samples used as well as sample numbers/names please see the actual values as printed in both Table 2 and Appendix 1 of Nowell et al.  Nowell et al. 1998
Fresh MORB in Pacific Ocean   176Hf/177Hf 0.283192786   5.87055e-05 0.283091 0.283269 14   Average value for Hf isotopes as found in MORB and NAIP samples taken from 14 different Pacific localities along the East Pacific Rise (EPR). These values are averaged over Pacific Ocean MORB and NAIP values given in table 2 and appendix 1 of this particular reference (2622: Nowell et al. 1998) without consideration of the standard deviation given by the authors according to these 14 values.   For latitude and longitude of samples used as well as sample numbers/names please see the actual values as printed in both Table 2 and Appendix 1 of Nowell et al. 1998. Nowell et al. 1998 Patchett & Tatsumoto 1980
Blichert-Toft et al. 1997

Fresh MORB in Pacific Ocean   176Hf/177Hf 0.283192786   5.87055e-05 0.283091 0.283269 14   Average value for Hf isotopes as found in MORB and NAIP samples taken from 14 different Pacific localities along the East Pacific Rise (EPR). These values are averaged over Pacific Ocean MORB and NAIP values given in table 2 and appendix 1 of this particular reference (2622: Nowell et al. 1998) without consideration of the standard deviation given by the authors according to these 14 values.   For latitude and longitude of samples used as well as sample numbers/names please see the actual values as printed in both Table 2 and Appendix 1 of Nowell et al. 1998. Nowell et al. 1998
Fresh MORB in Pacific Ocean   e-Hf 15.36444444   2.087235679 11.39 17.68 9   Average eHf value calculated from the multiple values for eHf given in Table 2 of Nowell et al. 1998.  The average is taken from eHf values from samples taken from 9 different localities in the Pacific Ocean along the East Pacific Rise.  For actual sample information and individual values for those samples please see Table 2 of Nowell et al. 1998 (Ref. No. 2622 in Earth Ref Reference Database). Nowell et al. 1998
N-MORB 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
Click to return to previous page