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DOI	10.1073/pnas.2021689118
	Volcanically extruded phosphides as an abiotic source of Venusian phosphine
	Truong N.; Lunine J.I.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:29
英文摘要	We hypothesize that trace amounts of phosphides formed in the mantle are a plausible abiotic source of the Venusian phosphine observed by Greaves et al. [Nat. Astron., https://doi.org/10.1038/ s41550-020-1174-4 (2020)]. In this hypothesis, small amounts of phosphides (P3− bound in metals such as iron), sourced from a deep mantle, are brought to the surface by volcanism. They are then ejected into the atmosphere in the form of volcanic dust by explosive volcanic eruptions, which were invoked by others to explain the episodic changes of sulfur dioxide seen in the atmosphere [Esposito, Science 223, 1072–1074 (1984)]. There they react with sulfuric acid in the aerosol layer to form phosphine (2 P3− + 3H2SO4 = 2PH3 + 3SO42-). We take issue with the conclusion of Bains et al. [arXiv:2009.06499 (2020)] that the volcanic rates for such a mechanism would have to be implausibly high. We consider a mantle with the redox state similar to the Earth, magma originating deep in the mantle—a likely scenario for the origin of plume volcanism on Venus—and episodically high but plausible rates of volcanism on a Venus bereft of plate tectonics. We conclude that volcanism could supply an adequate amount of phosphide to produce phosphine. Our conclusion is supported by remote sensing observations of the Venusian atmosphere and surface that have been interpreted as indicative of currently active volcanism. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Phosphine; Venus; Volcanism
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238479
作者单位	Department of Earth and Atmospheric Science, Cornell University, Ithaca, NY 14853, United States; Carl Sagan Institute, Cornell University, Ithaca, NY 14853, United States; Department of Astronomy, Cornell University, Ithaca, NY 14853, United States
推荐引用方式 GB/T 7714	Truong N.,Lunine J.I.. Volcanically extruded phosphides as an abiotic source of Venusian phosphine[J],2021,118(29).
APA	Truong N.,&Lunine J.I..(2021).Volcanically extruded phosphides as an abiotic source of Venusian phosphine.Proceedings of the National Academy of Sciences of the United States of America,118(29).
MLA	Truong N.,et al."Volcanically extruded phosphides as an abiotic source of Venusian phosphine".Proceedings of the National Academy of Sciences of the United States of America 118.29(2021).