气候变化领域集成服务门户(CCPortal): Volcanic controls on seawater sulfate over the past 120 million years

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DOI	10.1073/pnas.1921308117
	Volcanic controls on seawater sulfate over the past 120 million years
	Laakso T.A.; Waldeck A.; MacDonald F.A.; Johnston D.
发表日期	2020
ISSN	0027-8424
起始页码	21118
结束页码	21124
卷号	117 期号:35
英文摘要	Changes in the geological sulfur cycle are inferred from the sulfur isotopic composition of marine barite. The structure of the 34S/32S record from the Mesozoic to present, which includes ~50- and 100-Ma stepwise increases, has been interpreted as the result of microbial isotope effects or abrupt changes to tectonics and associated pyrite burial. Untangling the physical processes that govern the marine sulfur cycle and associated isotopic change is critical to understanding how climate, atmospheric oxygenation, and marine ecology have coevolved over geologic time. Here we demonstrate that the sulfur outgassing associated with emplacement of large igneous provinces can produce the apparent stepwise jumps in the isotopic record when coupled to long-term changes in burial efficiency. The record of large igneous provinces map onto the required outgassing events in our model, with the two largest steps in the sulfur isotope record coinciding with the emplacement of large igneous provinces into volatile-rich sedimentary basins. This solution provides a quantitative picture of the last 120 My of change in the ocean's largest oxidant reservoir. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Biogeochemistry; Large igneous provinces; Sulfur
语种	英语
scopus关键词	barium sulfate; oxygen; pyrite; sea water; sulfate; sulfur; Article; burial; chemical structure; climate; fractionation; isotope analysis; marine biology; mathematical analysis; oxygenation; priority journal; quantitative analysis; sea; sedimentation; sulfur cycle; volcano
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/160824
作者单位	Laakso, T.A., Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02139, United States; Waldeck, A., Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02139, United States; MacDonald, F.A., Department of Earth Science, University of California, Santa Barbara, CA 93106, United States; Johnston, D., Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02139, United States
推荐引用方式 GB/T 7714	Laakso T.A.,Waldeck A.,MacDonald F.A.,et al. Volcanic controls on seawater sulfate over the past 120 million years[J],2020,117(35).
APA	Laakso T.A.,Waldeck A.,MacDonald F.A.,&Johnston D..(2020).Volcanic controls on seawater sulfate over the past 120 million years.Proceedings of the National Academy of Sciences of the United States of America,117(35).
MLA	Laakso T.A.,et al."Volcanic controls on seawater sulfate over the past 120 million years".Proceedings of the National Academy of Sciences of the United States of America 117.35(2020).