Metal-silicate silicon isotopic fractionation and the composition of the bulk Earth

Moynier Frederic; Deng Zhengbin; Lanteri Ariane; Martins Rayssa; Chaussidon Marc; Savage Paul; Siebert Julien

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Metal-silicate silicon isotopic fractionation and the composition of the bulk Earth

机译：金属 - 硅酸盐硅同位素分级和散装地球的组成

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The difference in the Si isotopic composition between the Earth and primitive meteorites had been used to constrain the amount of Si in the Earth's core. However, there is presently a debate on the magnitude of the isotopic fractionation between metal and silicates as function of temperature based on experimental data. Here, we use a natural sample, an enstatite meteorite, Itqyi, as a natural experiment to determine an independent Si isotopic fractionation factor between metal and silicate. We determined the temperature of equilibrium between metal and silicate as well as the Si isotopic composition between the phases. We find that the dependence of Si isotopes with temperature to be:

机译：地球和原始陨石之间的Si同位素组成的差异已被用来限制地球核心中的Si量。然而，目前存在关于金属和硅酸盐之间的同位素分馏的大小的争论，如实验数据的温度的功能。在这里，我们使用天然样本，enstatite陨石，Itqyi作为自然实验，以确定金属和硅酸盐之间的独立Si同位素分级因子。我们确定了金属和硅酸盐之间的平衡温度以及相位之间的Si同位素组成。我们发现Si同位素与温度的依赖性是：

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来源
《Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System》 |2020年第1期|共8页
作者
Moynier Frederic; Deng Zhengbin; Lanteri Ariane; Martins Rayssa; Chaussidon Marc; Savage Paul; Siebert Julien;
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作者单位

Univ Paris Inst Phys Globe Paris CNRS 1 Rue Jussieu F-75005 Paris France;

Univ Paris Inst Phys Globe Paris CNRS 1 Rue Jussieu F-75005 Paris France;

Univ Paris Inst Phys Globe Paris CNRS 1 Rue Jussieu F-75005 Paris France;

Univ Paris Inst Phys Globe Paris CNRS 1 Rue Jussieu F-75005 Paris France;

Univ Paris Inst Phys Globe Paris CNRS 1 Rue Jussieu F-75005 Paris France;

Univ St Andrews Sch Earth &

Environm Sci Irvine Bldg St Andrews KY16 9AL Fife Scotland;

Univ Paris Inst Phys Globe Paris CNRS 1 Rue Jussieu F-75005 Paris France;

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原文格式 PDF
正文语种 eng
中图分类天文学、地球科学;行星、卫星、彗星、流星、陨星;
关键词
geochemistry; core formation; accretion; planetary differentiation; meteorites; Itqyi;

机译：地球化学;核心形成;accretion;行星分化;陨石;ITQYI;

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1. Metal-silicate silicon isotopic fractionation and the composition of the bulk Earth [J] . Moynier Frederic, Deng Zhengbin, Lanteri Ariane, Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System . 2020,第1期

机译：金属 - 硅酸盐硅同位素分级和散装地球的组成
2. Tin isotope fractionation during magmatic processes and the isotope composition of the bulk silicate Earth [J] . Wang Xueying, Amet Quentin, Fitoussi Caroline, Geochimica et Cosmochimica Acta: Journal of the Geochemical Society and the Meteoritical Society . 2018,第期

机译：岩石工艺期间的锡同位素分馏和散装硅酸盐地球的同位素组成
3. Calcium isotopic fractionation in mantle peridotites by melting and metasomatism and Ca isotope composition of the Bulk Silicate Earth [J] . Kang Jin-Ting, Ionov Dmitri A., Liu Fang, Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System . 2017,第期

机译：通过熔融和弥思散裂和散装硅酸盐地球的CA同位素组成的岩石阶层钙同位素分级
4. Are carbon and oxygen isotope compositions of bulk leaf material reliable predictors of water use efficiency in slow-growing droughtadapted species? [C] . C Werner, C Maguas International Congress on Photosynthesis . 2001

机译：是批量叶片材料的碳和氧同位素组成可靠的水利用效率预测因子在缓慢生长的促进脱水物种吗？
5. Isotopic fractionation effects under laser ablation of silicon from pure silicon and silicon oxide targets. [D] . Shappirio, Mark. 2004

机译：激光烧蚀纯硅和氧化硅靶材上的硅时，同位素分馏效应。
6. Meteorite zircon constraints on the bulk Lu−Hf isotope composition and early differentiation of the Earth [O] . Tsuyoshi Iizuka, Takao Yamaguchi, Yuki Hibiya, 2015

机译：陨石锆石对Lu-Hf同位素组成和地球早期分化的约束
7. Stable chromium isotopic composition of meteorites and metal-silicate experiments: implications for fractionation during core formation [O] . Bonnand, P, Wood, BJ, Halliday, A, 2016

机译：陨石和金属硅酸盐实验的稳定铬同位素组成：对岩心形成过程中分馏的影响
8. Isotopic composition of Murchison organic compounds: Intramolecular carbon isotope fractionation of acetic acid. Simulation studies of cosmochemical organic syntheses [R] . Yuen, G. U., Cronin, J. R., Blair, N. E., 1991

机译：murchison有机化合物的同位素组成：乙酸的分子内碳同位素分馏。宇宙化学有机合成的模拟研究

Metal-silicate silicon isotopic fractionation and the composition of the bulk Earth

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