andesite low calcium pyroxene 0.14 Ewart & Griffin 1994 andesite magnetite 2 Burke et al. 1982 andesite olivine 0.3 Klock & Palme 1988 andesite olivine 0.11 Ewart & Griffin 1994 andesite plagioclase 0.18 Ewart & Griffin 1994 basalt metal 1000 Klock & Palme 1988 high silica rhyolite low calcium pyroxene 0.23 Ewart & Griffin 1994 high silica rhyolite magnetite 2.6 Burke et al. 1982 high silica rhyolite plagioclase 0.02 0.12 Ewart & Griffin 1994 leucosome plagioclase 0.056 Ewart & Griffin 1994 low silica rhyolite k-feldspar 0.11 0.41 Ewart & Griffin 1994 low silica rhyolite low calcium pyroxene 0.45 0.83 Ewart & Griffin 1994 low silica rhyolite magnetite 1.1 Burke et al. 1982 low silica rhyolite plagioclase 0.05 Ewart & Griffin 1994 quartz latite clinopyroxene 0.51 Ewart & Griffin 1994 quartz latite low calcium pyroxene 0.25 0.3 Ewart & Griffin 1994 quartz latite magnetite 1.4 3.6 Burke et al. 1982 quartz latite plagioclase 0.1 0.39 Ewart & Griffin 1994 rhyolite pyrrhotite 2 3 Stimac & Hickmott 1994