Siderophile elements in the upper mantle of the Earth: New clues from metal-silicate partition coefficients

Details Siderophile elements in the upper mantle of the Earth: New clues from metal-silicate partition coefficients Siderophile elements in the upper mantle of the Earth: New clues from metal-silicate partition coefficients

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24..667h&link_type=abstract

In Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 2: G-M p 667-668 (SEE N94-16173 03-91)

Physics

Cobalt Oxides, Earth Mantle, Glass, Melts (Crystal Growth), Molybdenum Oxides, Nickel Oxides, Solubility, Geochemistry, Mineralogy, Oxidation, Silicates

Scientific paper

New, precise data on the solubilities of Ni, Co, and Mo in silicate melts at 1400 C and fO2 from IW to IW-2 are presented. The results suggest NiO, CoO as stable species in the melt. No evidence for metallic Ni or Co was found. Equilibrium was ensured by reversals with initially high Ni and Co in the glass. Mo appears to change oxidation state at IW-1, from MoO3 to MoO2. Metal-silicate partition coefficients calculated from these data and recent data on Pd indicate similar partition coefficients for Pd and Mo at the conditions of core formation. This unexpected result constrains models of core formation in the Earth.

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