文章基本信息

标题：Melting relations in the Fe–S–Si system at high pressure and temperature: implications for the planetary core
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作者：Takanori Sakairi ; Eiji Ohtani ; Seiji Kamada 等
期刊名称：Progress in Earth and Planetary Science
电子版ISSN：2197-4284
出版年度：2017
卷号：4
期号：1
页码：10-20
DOI：10.1186/s40645-017-0125-x
出版社：Springer Verlag
摘要：The phase and melting relations in the Fe–S–Si system were determined up to 60 GPa by using a double-sided laser-heated diamond anvil cell combined with X-ray diffraction. On the basis of the X-ray diffraction patterns, we confirmed that hcp/fcc Fe–Si alloys and Fe 3 S are stable phases under subsolidus conditions in the Fe–S–Si system. Both solidus and liquidus temperatures are significantly lower than the melting temperature of pure Fe and both increase with pressure. The slopes of the Fe–S–Si liquidus and solidus curves determined here are smaller than the adiabatic temperature gradients of the liquid cores of Mercury and Mars. Thus, crystallization of their cores started at the core–mantle boundary region.
关键词：Planetary core ; Melting relations ; Fe ; S ; Si system ; Diamond anvil cell