Computer Science
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..351f&link_type=abstract
Lunar and Planetary Science, volume 27, page 351
Computer Science
Cores: Composition, Experiments: High-Pressure, Iron-Iron Sulfate System, Mars: Core, Melting: Relations
Scientific paper
Compositional models, based on element correlations observed in SNC meteorites and cosmochemical constraints, suggest that the Martian core is enriched in FeS. Whether the Martian core is liquid or solid is dependent on its thermal state and the melting behavior of the core materials. Accurate determination of melting temperatures in the Fe-FeS system at high pressure is required to assess the state of a sulfur-bearing iron-core. Melting in the system Fe-FeS at high pressure has been studied up to 10 GPa, far below the core pressures of Mars. The results above 5 GPa are still controversial. We have carried out high-pressure melting experiments on Fe-FeS mixtures in piston-cylinder and multi-anvil apparatus. In this paper, we present our melting data in the Fe-FeS system up to core pressures of Mars. We also report a new iron-sulfur compound (Fe3S2), synthesized above 14 GPa, which affects the melting behavior in the simple binary system. Finally, we discuss the state of the Martian core in light of our new experimental results.
Bertka Constance M.
Fei Yingwei
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