GERM Reservoir Database
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GERM Database Search Results        
Reservoir Z Element Value Median SD Low High N Unit Info Reference Source(s)
Continental Crust   206Pb/204Pb       18.04 18.35     Assuming 7 ppm Pb in lower crust and 15-20 ppm Pb in upper crust. Pb isotopic compositions for upper crust are 206Pb/204Pb = 18.76 and 207Pb/204Pb = 15.66 from Newsom et al. (1986) and the lower crust from models 1-4 in this Table. Rudnick & Goldstein 1990
Continental Crust   207Pb/204Pb       15.51 15.62     Assuming 7 ppm Pb in lower crust and 15-20 ppm Pb in upper crust. Pb isotopic compositions for upper crust are 206Pb/204Pb = 18.76 and 207Pb/204Pb = 15.66 from Newsom et al. (1986) and the lower crust from models 1-4 in this Table. Rudnick & Goldstein 1990
Lower Continental Crust 82 Pb 5.2           ppm Rudnick & Goldstein 1990 Davies 1984
Lower Continental Crust 82 Pb 6.8           ppm Rudnick & Goldstein 1990 Zartman & Doe 1981
Lower Continental Crust 82 Pb 4           ppm Rudnick & Goldstein 1990 Taylor & McLennan 1985
Lower Continental Crust 82 Pb 7           ppm Rudnick & Goldstein 1990
Lower Continental Crust 82 Pb 7.5           ppm Rudnick & Goldstein 1990 Newsom et al. 1986
Upper Continental Crust 82 Pb 15           ppm Rudnick & Goldstein 1990 Newsom et al. 1986
Upper Continental Crust 82 Pb 13           ppm Rudnick & Goldstein 1990 Davies 1984
Upper Continental Crust 82 Pb 20           ppm Rudnick & Goldstein 1990 Taylor & McLennan 1985
Upper Continental Crust 82 Pb       15 20   ppm Rudnick & Goldstein 1990
Upper Continental Crust 82 Pb 23.5           ppm Rudnick & Goldstein 1990 Zartman & Doe 1981
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