气候变化领域集成服务门户(CCPortal): Earth’s volatile element depletion pattern inherited from a carbonaceous chondrite-like source

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DOI	10.1038/s41561-019-0375-x
	Earth’s volatile element depletion pattern inherited from a carbonaceous chondrite-like source
	Braukmüller N.; Wombacher F.; Funk C.; Münker C.
发表日期	2019
ISSN	17520894
卷号	12 期号:7
英文摘要	Earth’s volatile element abundances (for example, sulfur, zinc, indium and lead) provide constraints on fundamental processes, such as planetary accretion, differentiation and the delivery of volatile species, like water, which contributed to Earth becoming a habitable planet. The composition of the silicate Earth suggests a chemical affinity but isotopic disparity to carbonaceous chondrites—meteorites that record the early element fractionations in the protoplanetary disk. However, the volatile element depletion pattern of the silicate Earth is obscured by core formation. Another key problem is the overabundance of indium, which could not be reconciled with any known chondrite group. Here we complement recently published volatile element abundances for carbonaceous chondrites with high-precision sulfur, selenium and tellurium data. We show that both Earth and carbonaceous chondrites exhibit a unique hockey stick volatile element depletion pattern in which volatile elements with low condensation temperatures (750–500 K) are unfractionated from each other. This abundance plateau accounts for the apparent overabundance of indium in the silicate Earth without the need of exotic building materials or vaporization from precursors or during the Moon-forming impact and suggests the accretion of 10–15 wt% CI-like material before core formation ceased. Finally, more accurate estimates of volatile element abundances in the core and bulk Earth can now be provided. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	carbonaceous chondrite; condensation; Earth; isotopic fractionation; meteorite; rare earth element; volatile substance
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124647
作者单位	Institut für Geologie und Mineralogie, Universität zu Köln, Köln, Germany; Steinmann Institut für Geologie, Mineralogie und Paläontologie, Universität Bonn, Poppelsdorfer Schloss, Bonn, Germany
推荐引用方式 GB/T 7714	Braukmüller N.,Wombacher F.,Funk C.,等. Earth’s volatile element depletion pattern inherited from a carbonaceous chondrite-like source[J],2019,12(7).
APA	Braukmüller N.,Wombacher F.,Funk C.,&Münker C..(2019).Earth’s volatile element depletion pattern inherited from a carbonaceous chondrite-like source.Nature Geoscience,12(7).
MLA	Braukmüller N.,et al."Earth’s volatile element depletion pattern inherited from a carbonaceous chondrite-like source".Nature Geoscience 12.7(2019).