globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2020.116333
论文题名:
Sedimentary host phases of mercury (Hg) and implications for use of Hg as a volcanic proxy
作者: Shen J.; Feng Q.; Algeo T.J.; Liu J.; Zhou C.; Wei W.; Liu J.; Them T.R.; II; Gill B.C.; Chen J.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 543
语种: 英语
中文关键词: 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
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165263
Appears in Collections:气候变化与战略

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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

Recommended Citation:
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]. Earth and Planetary Science Letters,2020-01-01,543
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