气候变化领域集成服务门户(CCPortal): Sedimentary pyrite sulfur isotopes track the local dynamics of the Peruvian oxygen minimum zone

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DOI	10.1038/s41467-021-24753-x
	Sedimentary pyrite sulfur isotopes track the local dynamics of the Peruvian oxygen minimum zone
	Pasquier V.; Fike D.A.; Halevy I.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	Sulfur cycling is ubiquitous in sedimentary environments, where it mediates organic carbon remineralization, impacting both local and global redox budgets, and leaving an imprint in pyrite sulfur isotope ratios (δ34Spyr). It is unclear to what extent stratigraphic δ34Spyr variations reflect local aspects of the depositional environment or microbial activity versus global sulfur-cycle variations. Here, we couple carbon-nitrogen-sulfur concentrations and stable isotopes to identify clear influences on δ34Spyr of local environmental changes along the Peru margin. Stratigraphically coherent glacial-interglacial δ34Spyr fluctuations (>30‰) were mediated by Oxygen Minimum Zone intensification/expansion and local enhancement of organic matter deposition. The higher resulting microbial sulfate reduction rates led to more effective drawdown and 34S-enrichment of residual porewater sulfate and sulfide produced from it, some of which is preserved in pyrite. We identify organic carbon loading as a major influence on δ34Spyr, adding to the growing body of evidence highlighting the local controls on these records. © 2021, The Author(s).
语种	英语
scopus关键词	carbon; iron; nitrogen; organic carbon; oxygen; pyrite; stable isotope; sulfate; sulfur; oxygen; pyrite; sulfide; sulfur; concentration (composition); depositional environment; drawdown; environmental change; glacial-interglacial cycle; oxygen minimum layer; sulfur isotope; Article; benthic foraminifera; biogeochemical cycling; chronology; climate; dynamics; environmental change; histogram; Holocene; nonhuman; Peru; sedimentation rate; total organic carbon; X ray fluorescence; anaerobic bacterium; carbon cycle; chemistry; geography; metabolism; microbiology; oxidation reduction reaction; sediment; Peru; Bacteria, Anaerobic; Carbon; Carbon Cycle; Geography; Geologic Sediments; Iron; Oxidation-Reduction; Oxygen; Peru; Sulfides; Sulfur; Sulfur Isotopes
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/251384
作者单位	Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel; Earth and Planetary Sciences, Washington University in St. Louis, St. Louis, MO, United States
推荐引用方式 GB/T 7714	Pasquier V.,Fike D.A.,Halevy I.. Sedimentary pyrite sulfur isotopes track the local dynamics of the Peruvian oxygen minimum zone[J],2021,12(1).
APA	Pasquier V.,Fike D.A.,&Halevy I..(2021).Sedimentary pyrite sulfur isotopes track the local dynamics of the Peruvian oxygen minimum zone.Nature Communications,12(1).
MLA	Pasquier V.,et al."Sedimentary pyrite sulfur isotopes track the local dynamics of the Peruvian oxygen minimum zone".Nature Communications 12.1(2021).