Melting experiments on Fe–Fe 3 S system to 254 GPa

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書誌事項

公開日
2017-04
資源種別
journal article
権利情報
  • https://www.elsevier.com/tdm/userlicense/1.0/
DOI
  • 10.1016/j.epsl.2017.02.021
公開者
Elsevier BV

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説明

Abstract Melting experiments were performed on the Fe–Fe 3 S system at high pressures between 34 and 254 GPa in a laser-heated diamond-anvil cell (DAC), using starting materials of fine-grained homogeneous mixtures of Fe and FeS ( 5.7 ( ± 0.3 ) wt.% S coexisted with both solid Fe 3 S and Fe containing 3.9 ( ± 0.4 ) wt.% S at 254 GPa and 3550 K. The eutectic liquid at inner core boundary (ICB) pressure includes less sulfur than is required to account for the density deficit of the outer core (≥10 wt.% S). Furthermore, the difference in sulfur concentration between coexisting liquid and solid is not sufficient to account for the observed density jump across the ICB. These indicate that sulfur cannot be a predominant light element in the core.

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