气候变化领域集成服务门户(CCPortal): Decreasing extents of Archean serpentinization contributed to the rise of an oxidized atmosphere

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DOI	10.1038/s41467-021-27589-7
	Decreasing extents of Archean serpentinization contributed to the rise of an oxidized atmosphere
	Leong J.A.M.; Ely T.; Shock E.L.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	At present, molecular hydrogen (H2) produced through Fe(II) oxidation during serpentinization of ultramafic rocks represents a small fraction of the global sink for O2 due to limited exposures of ultramafic rocks. In contrast, ultramafic rocks such as komatiites were much more common in the Early Earth and H2 production via serpentinization was a likely factor in maintaining an O2-free atmosphere throughout most of the Archean. Using thermodynamic simulations, this work quantifies the global O2 consumption attributed to serpentinization during the past 3.5 billion years. Results show that H2 generation is strongly dependent on rock compositions where serpentinization of more magnesian lithologies generated substantially higher amounts of H2. Consumption of >2 Tmole O2 yr−1 via low-temperature serpentinization of Archean continents and seafloor is possible. This O2 sink diminished greatly towards the end of the Archean as ultramafic rocks became less common and helped set the stage for the Great Oxidation Event. © 2021, The Author(s).
语种	英语
scopus关键词	Archean; komatiite; oxidation; seafloor; serpentinization; thermodynamics; ultramafic rock
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/251279
作者单位	School of Earth and Space Exploration, Arizona State University, Tempe, AZ, United States; School of Molecular Sciences, Arizona State University, Tempe, AZ, United States; Lamont-Doherty Earth Observatory, Columbia University, New York, NY, United States; Department of Earth and Environmental Sciences, University of Minnesota, Minneapolis, MN, United States; 39 Alpha Research, Tempe, AZ, United States
推荐引用方式 GB/T 7714	Leong J.A.M.,Ely T.,Shock E.L.. Decreasing extents of Archean serpentinization contributed to the rise of an oxidized atmosphere[J],2021,12(1).
APA	Leong J.A.M.,Ely T.,&Shock E.L..(2021).Decreasing extents of Archean serpentinization contributed to the rise of an oxidized atmosphere.Nature Communications,12(1).
MLA	Leong J.A.M.,et al."Decreasing extents of Archean serpentinization contributed to the rise of an oxidized atmosphere".Nature Communications 12.1(2021).