کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5779918 | 1634692 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Melting experiments on Fe-Fe3S system to 254 GPa
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
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چکیده انگلیسی
Melting experiments were performed on the Fe-Fe3S 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 (<500 nm) prepared by induction melting and rapid quenching techniques. Melting phase relations including the liquid/solid partitioning of sulfur were examined on the basis of textural and chemical characterizations of recovered samples using a focused ion beam (FIB) and electron microprobes. The results demonstrate that the sulfur content in eutectic liquid decreases substantially with increasing pressure. The eutectic liquid Fe with 5.7(±0.3) wt.% S coexisted with both solid Fe3S 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 (â¥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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Earth and Planetary Science Letters - Volume 464, 15 April 2017, Pages 135-141
Journal: Earth and Planetary Science Letters - Volume 464, 15 April 2017, Pages 135-141
نویسندگان
Yuko Mori, Haruka Ozawa, Kei Hirose, Ryosuke Sinmyo, Shigehiko Tateno, Guillaume Morard, Yasuo Ohishi,