气候变化领域集成服务门户(CCPortal): Sedimentary host phases of mercury (Hg) and implications for use of Hg as a volcanic proxy

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DOI	10.1016/j.epsl.2020.116333
	Sedimentary host phases of mercury (Hg) and implications for use of Hg as a volcanic proxy
	Shen J.; Feng Q.; Algeo T.J.; Liu J.; Zhou C.; Wei W.; Liu J.; Them T.R.; II; Gill B.C.; Chen J.
发表日期	2020
ISSN	0012821X
卷号	543
英文摘要	Mercury (Hg) concentration enrichments have become a widely used proxy for volcanic inputs to sediments, especially for investigation of ancient large igneous province (LIP) eruptions. Its application for this purpose requires normalization to an element representing the dominant host phase of Hg–generally total organic carbon (TOC) for the organic fraction, but occasionally total sulfur (TS) or aluminum (Al) for the sulfide or clay fractions, respectively. Hg studies generally assume an organic matter host, but recent work has demonstrated that sulfide or clay fraction host phases are not uncommon, making it essential to determine formation-specific Hg host phases. Here, we investigate Hg concentrations and their relationships to TOC, TS, and Al in four modern marine settings (Black Sea, Japan Sea, Saanich Inlet, and Peru Margin) and six ancient marine formations (from Lower Cambrian to Lower Jurassic). Multiple regression analysis (MRA) shows that the organic fraction is the dominant host of Hg in all of the modern marine sediments examined here, as well as in many ancient marine units, although in some of the latter Hg resides primarily in the sulfide fraction (i.e., lower Cambrian and Upper Ordovician units) or partly in the clay mineral fraction (Middle Permian) of the sediment. A sulfide host phase is more likely in strongly euxinic depositional facies, as reflected in high TS concentrations (>1.0%) and TS/TOC ratios (>∼0.35). This study thus demonstrates the importance of determining Hg host phases in sediments prior to normalization and use of Hg as a volcanic proxy. © 2020 Elsevier B.V.
关键词	black shale mass extinction organic matter pyrite sulfide volcanism
英文关键词	Deposition; Organic carbon; Regression analysis; Sediments; Submarine geology; Sulfur compounds; Volcanoes; Hg concentrations; ITS applications; Large igneous provinces; Lower cambrians; Marine sediments; Multiple regression analysis; Organic fractions; Total Organic Carbon; Aluminum compounds; aluminum; clay mineral; concentration (composition); marine sediment; mercury (element); multiple regression; sediment chemistry; sulfur; total organic carbon; trace element; Black Sea; British Columbia; Canada; Pacific Ocean; Peru Margin; Saanich Inlet; Sea of Japan
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202885
作者单位	State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, Hubei 430074, China; School of Earth Sciences, China University of Geosciences, Wuhan, Hubei 430074, China; Department of Geology, University of Cincinnati, Cincinnati, OH 45221-0013, United States; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, Hubei 430074, China; State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, Fujian 361102, China; Department of Geology and Environmental Geosciences, College of Charleston, Charleston, SC 29424, United States; Department of Geosciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States; Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, China
推荐引用方式 GB/T 7714	Shen J.,Feng Q.,Algeo T.J.,et al. Sedimentary host phases of mercury (Hg) and implications for use of Hg as a volcanic proxy[J],2020,543.
APA	Shen J..,Feng Q..,Algeo T.J..,Liu J..,Zhou C..,...&Chen J..(2020).Sedimentary host phases of mercury (Hg) and implications for use of Hg as a volcanic proxy.Earth and Planetary Science Letters,543.
MLA	Shen J.,et al."Sedimentary host phases of mercury (Hg) and implications for use of Hg as a volcanic proxy".Earth and Planetary Science Letters 543(2020).