Dissolution of Silicon and Oxygen in Molten Iron at High Pressure and Temperature.

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概要

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• Reaction between molten iron and silicate at high pressure and temperature was examined by employing a mixture of pure iron and (Mg0.9Fe0.1)2SiO4 olivine as the starting material. The experimental charge quenched at 24 GPa and 2550°C demonstrated that certain amount of SiO2 component (at least 2wt% of Si) dissolved into mol ten iron fromthe silicate melt. It is suggested that the dissolving would be enhanced with increasing pressure. The experimental results indicate that Si and O are the important alloying light-elements in the earth's core if the core segregation proceeded in the magma ocean of the proto-earth. Concurrently, SiO2 contents of the mantle should be substantially reduced from its primitive content.

• 日本学士院の論文

著者

• Ito Eiji

  Institute For Study Of Earth's Lnterior Okayama University

• KATSURA Tomoo

  Universitat Bayreuth

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