Experimental determination of metal/silicate partition coefficients for P, Co, Ni, Cu, Ga, Ge, Mo, and W and some implications for the early evolution of the earth

Details Experimental determination of metal/silicate partition coefficients for P, Co, Ni, Cu, Ga, Ge, Mo, and W and some implications for the early evolution of the earth Experimental determination of metal/silicate partition coefficients for P, Co, Ni, Cu, Ga, Ge, Mo, and W and some implications for the early evolution of the earth

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989gecoa..53..173s&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 53, Jan. 1989, p. 173-185.

Physics

30

Earth (Planet), Metals, Mineralogy, Planetary Evolution, Silicates, Abundance, Basalt, Oxygen, Radioactive Materials, Temperature Dependence, Trace Elements

Scientific paper

Metal-silicate partition coefficients were determined at 1600 C for P, Ga, Ge, and W and at 1300 C for P, Fe, Co, Ni, Cu, Ga, Ge, Mo, and W, using well-homogenized tholeiitic basalt powder as a starting material for silicates; parallel samples, containing either radioactive metal or radioactive metal oxide as tracers, were placed simultaneously into a furnace. For all elements, the correlations obtained between the logs of the O2 fugacity and the partition coefficients were linear, with the slopes reflecting the number of oxygen atoms associated with the metal oxides in the silicate phase. Reasonable agreement with literature data was found for all elements except Mo. The significance of the metal-silicate partition coefficients for models of core formation is discussed.

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