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)
Andesites 13 Al 17.02         2203 wt%ox Average major oxide concentration values for Andesite consolidated from 200 references and 2203 analyses. Differentiation index equal to 51.41, Crystallization index equal to 34.27. Le Maitre 1976
Andesites 6 C       10 1200   ppm Averages of typical pre-eruptive volatile abundances in Andesites. Note that it is particularly difficult to quantify pre-eruptive volatile abundances for Andesites because most are erupted subaerially after significant degassing has taken place and contain abundant phenocrysts such that liquid compositions are more silicic than bulk rock. Mineral disequilibria also hamper experimental work. Oppenheimer 2004 Johnson et al. 1993
Wallace & Anderson 2000
Andesites 6 C 0.05         2203 wt%ox Average major oxide concentration values for Andesite consolidated from 200 references and 2203 analyses. Differentiation index equal to 51.41, Crystallization index equal to 34.27. Le Maitre 1976
Andesites 20 Ca 6.79         2203 wt%ox Average major oxide concentration values for Andesite consolidated from 200 references and 2203 analyses. Differentiation index equal to 51.41, Crystallization index equal to 34.27. Le Maitre 1976
Andesites 17 Cl       1500 5000   ppm Averages of typical pre-eruptive volatile abundances in Andesites. Note that it is particularly difficult to quantify pre-eruptive volatile abundances for Andesites because most are erupted subaerially after significant degassing has taken place and contain abundant phenocrysts such that liquid compositions are more silicic than bulk rock. Mineral disequilibria also hamper experimental work. Oppenheimer 2004 Johnson et al. 1993
Wallace & Anderson 2000
Andesites 9 F         500   ppm Averages of typical pre-eruptive volatile abundances in Andesites. Note that it is particularly difficult to quantify pre-eruptive volatile abundances for Andesites because most are erupted subaerially after significant degassing has taken place and contain abundant phenocrysts such that liquid compositions are more silicic than bulk rock. Mineral disequilibria also hamper experimental work. Oppenheimer 2004 Johnson et al. 1993
Wallace & Anderson 2000
Andesites 26 Fe 6.982         2203 wt%ox Average major oxide concentration values for Andesite consolidated from 200 references and 2203 analyses. Differentiation index equal to 51.41, Crystallization index equal to 34.27.Total Fe calculated from Fe2O3 value of 3.27 and FeO value of 4.04. Le Maitre 1976
Andesites 1 H 1.17         2203 wt%ox Average major oxide concentration values for Andesite consolidated from 200 references and 2203 analyses. Differentiation index equal to 51.41, Crystallization index equal to 34.27.Combination of H2O+ and H2O- values. Le Maitre 1976
Andesites 1 H       3     wt% Averages of typical pre-eruptive volatile abundances in Andesites. Note that it is particularly difficult to quantify pre-eruptive volatile abundances for Andesites because most are erupted subaerially after significant degassing has taken place and contain abundant phenocrysts such that liquid compositions are more silicic than bulk rock. Mineral disequilibria also hamper experimental work. Oppenheimer 2004 Johnson et al. 1993
Wallace & Anderson 2000
Andesites 19 K 1.62         2203 wt%ox Average major oxide concentration values for Andesite consolidated from 200 references and 2203 analyses. Differentiation index equal to 51.41, Crystallization index equal to 34.27. Le Maitre 1976
Andesites 12 Mg 3.33         2203 wt%ox Average major oxide concentration values for Andesite consolidated from 200 references and 2203 analyses. Differentiation index equal to 51.41, Crystallization index equal to 34.27. Le Maitre 1976
Andesites 25 Mn 0.14         2203 wt%ox Average major oxide concentration values for Andesite consolidated from 200 references and 2203 analyses. Differentiation index equal to 51.41, Crystallization index equal to 34.27. Le Maitre 1976
Andesites 11 Na 3.48         2203 wt%ox Average major oxide concentration values for Andesite consolidated from 200 references and 2203 analyses. Differentiation index equal to 51.41, Crystallization index equal to 34.27. Le Maitre 1976
Andesites 15 P 0.21         2203 wt%ox Average major oxide concentration values for Andesite consolidated from 200 references and 2203 analyses. Differentiation index equal to 51.41, Crystallization index equal to 34.27. Le Maitre 1976
Andesites 16 S         1000   ppm Averages of typical pre-eruptive volatile abundances in Andesites. Note that it is particularly difficult to quantify pre-eruptive volatile abundances for Andesites because most are erupted subaerially after significant degassing has taken place and contain abundant phenocrysts such that liquid compositions are more silicic than bulk rock. Mineral disequilibria also hamper experimental work. Oppenheimer 2004 Johnson et al. 1993
Wallace & Anderson 2000
Andesites 16 S       200 400   ppm Averages of typical pre-eruptive volatile abundances in Andesites. Note that it is particularly difficult to quantify pre-eruptive volatile abundances for Andesites because most are erupted subaerially after significant degassing has taken place and contain abundant phenocrysts such that liquid compositions are more silicic than bulk rock. Mineral disequilibria also hamper experimental work. Oppenheimer 2004 Johnson et al. 1993
Wallace & Anderson 2000
Andesites 14 Si 57.94         2203 wt%ox Average major oxide concentration values for Andesite consolidated from 200 references and 2203 analyses. Differentiation index equal to 51.41, Crystallization index equal to 34.27. Le Maitre 1976
Andesites 22 Ti 0.87         2203 wt%ox Average major oxide concentration values for Andesite consolidated from 200 references and 2203 analyses. Differentiation index equal to 51.41, Crystallization index equal to 34.27. Le Maitre 1976
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