Iron-water reaction under high pressure and its implication in the evolution of the earth

Details Iron-water reaction under high pressure and its implication in the evolution of the earth Iron-water reaction under high pressure and its implication in the evolution of the earth

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.9222f&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Aug. 10, 1986, p. 9222-9230.

Physics

25

Chemical Evolution, Earth Core, High Pressure, Iron, Planetary Evolution, Water, Earth Mantle, Hydrides, Hydrogen, Mass Flow, Solubility, Terrestrial Planets

Scientific paper

Properties of the Fe-H system and the Fe-H2O reaction under high pressure are discussed, and it is suggested that the Fe-H2O reaction should have played a crucial role in the evolution of the earth, including the core-mantle separation and the dissolution of hydrogen in the earth's core. Assuming a 10:90 mixture of low-temperature and high-temperature components for the primordial mass, and Fe/(Fe + Mg) of about 0.11 for the whole mantle, the mass flow in the evolution process is calculated, and reasonable values are obtained for the density deficit of the outer core. Using the density reduction data, an outer core composition of DeH(0.25)C(0.05)O(0.13)S(0.03) is derived.

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