Carbon in the core

Details Carbon in the core Carbon in the core

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993e%26psl.117..593w&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 117, no. 3-4, p. 593-607.

Computer Science

80

Carbon, Earth Core, Planetary Composition, Planetary Evolution, Protoplanets, Chemical Composition, Melting, Pressure Dependence, Solubility, Volatility

Scientific paper

Carbon volatility is noted to be a strongly pressure-dependent phenomenon which occurs during condensation from a solar gas, but not at pressures and temperatures generated during planetary accretion and differentiation. Impact heating and degassing of the protoearth would therefore have resulted in an Fe-rich melt with 2-4 wt pct C, rather than the 0.01-0.6 wt pct in Fe meteorites and the 0.3-3 ppm C predicted for Fe condensed from the solar gas. Experiments conducted at pressures of up to 9 GPa on the Fe-C and Fe-C-S systems indicate that while C solubility in an Fe melt increases slightly with pressure, C could not make up more than half the light element content of the core.

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