气候变化领域集成服务门户(CCPortal): Helium in diamonds unravels over a billion years of craton metasomatism

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DOI	10.1038/s41467-021-22860-3
	Helium in diamonds unravels over a billion years of craton metasomatism
	Weiss Y.; Kiro Y.; Class C.; Winckler G.; Harris J.W.; Goldstein S.L.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	Chemical events involving deep carbon- and water-rich fluids impact the continental lithosphere over its history. Diamonds are a by-product of such episodic fluid infiltrations, and entrapment of these fluids as microinclusions in lithospheric diamonds provide unique opportunities to investigate their nature. However, until now, direct constraints on the timing of such events have not been available. Here we report three alteration events in the southwest Kaapvaal lithosphere using U-Th-He geochronology of fluid-bearing diamonds, and constrain the upper limit of He diffusivity (to D ≈ 1.8 × 10−19 cm2 s−1), thus providing a means to directly place both upper and lower age limits on these alteration episodes. The youngest, during the Cretaceous, involved highly saline fluids, indicating a relationship with late-Mesozoic kimberlite eruptions. Remnants of two preceding events, by a Paleozoic silicic fluid and a Proterozoic carbonatitic fluid, are also encapsulated in Kaapvaal diamonds and are likely coeval with major surface tectonic events (e.g. the Damara and Namaqua–Natal orogenies). © 2021, The Author(s).
语种	英语
scopus关键词	carbon; diamond; helium; nitrogen; silicon dioxide; sodium chloride; water; byproduct; continental lithosphere; diamond; geochronology; helium; metasomatism; Article; chemical reaction; craton; Cretaceous; diffusivity; geology; laser ablation inductively coupled plasma mass spectrometry; lithosphere; Mesozoic; metasomatism; Paleozoic; Proterozoic; surface property
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/251455
作者单位	The Freddy and Nadine Herrmann Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel; Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States; Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel; Department of Earth and Environmental Sciences, Columbia University, Palisades, NY, United States; School of Geographical and Earth Sciences, University of Glasgow, Glasgow, United Kingdom
推荐引用方式 GB/T 7714	Weiss Y.,Kiro Y.,Class C.,et al. Helium in diamonds unravels over a billion years of craton metasomatism[J],2021,12(1).
APA	Weiss Y.,Kiro Y.,Class C.,Winckler G.,Harris J.W.,&Goldstein S.L..(2021).Helium in diamonds unravels over a billion years of craton metasomatism.Nature Communications,12(1).
MLA	Weiss Y.,et al."Helium in diamonds unravels over a billion years of craton metasomatism".Nature Communications 12.1(2021).