Experimental investigations of the melting relations in the Fe-FeS system at high pressures and implications for planetary cores

Details Experimental investigations of the melting relations in the Fe-FeS system at high pressures and implications for planetary cores Experimental investigations of the melting relations in the Fe-FeS system at high pressures and implications for planetary cores

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufm.u43c..07c&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #U43C-07

Physics

3612 Reactions And Phase Equilibria (1012, 8412), 3630 Experimental Mineralogy And Petrology, 3900 Mineral Physics, 3924 High-Pressure Behavior, 3939 Physical Thermodynamics

Scientific paper

We have investigated melting relations in the Fe-FeS system at high pressures using a multi-anvil apparatus. Sulfur is believed to be one of the most likely alloying light elements in iron-rich planetary cores. Understanding the thermal and physical state as well as the evolution of planetary cores require detailed knowledge on the melting relations and sub-solidus mineralogy in the Fe-FeS system at high pressures. We have determined the liquidus curve of the iron-rich portion of the Fe-S binary system at 10 GPa and 14 GPa. Our data are applied to the current core of Mercury and proto-cores of Venus, Earth, and Mars. We will estimate the thermal profile of Mercury's core based on existing composition models. The contribution of latent heat to the energy budget of the cores of the terrestrial planets and its implications for the age of the Earth's inner core will also be discussed.

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