Physics
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pepi...69..163s&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 69, Issue 3-4, p. 163-175.
Physics
4
Scientific paper
The systems (Fe, Ni)-silicate-water, (Fe, Co)-silicate-water and (Fe, Ni)-silicate-water-sulfur were investigated at around 5 GPa and 1000-1500°C by using a tetrahedral-anvil and cubic-anvil high-pressure apparatus. The quenched samples showed the coexistence of olivine, pyroxene and metal. The distribution behavior of Fe, Ni and Co between metal-olivine and metal-pyroxene was measured in these quenched samples. The observed values of apparent partition coefficients, K'(Fe-Ni) and K'(Fe-Co), were approximately 40-100 and 10-30, respectively. These values are 10-100 times larger than the estimated value for the Earth's core and mantle, and would indicate that the Earth could not be in equilibrium as a total system. To explain the observed transition metal abundance in the Earth, it is necessary to consider the accretion process and the core formation processes in the partially molten layer of the proto-Earth.
Akimoto Syun-Iti
Suzuki Toshihiro
Yagi Takehiko
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