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DOI	10.1016/j.earscirev.2019.102880
	Mercury as a proxy for volcanic emissions in the geologic record
	Grasby S.E.; Them T.R.; II; Chen Z.; Yin R.; Ardakani O.H.
发表日期	2019
ISSN	00128252
卷号	196
英文摘要	Large igneous province (LIP) eruptions are increasingly considered to have driven mass extinction events throughout the Phanerozoic; however, uncertainties in radiometric age dating of LIP materials, along with difficulty in accurate age dating of sedimentary rocks that record the environmental and biological history of our planet, create inherent uncertainties in any linkage. As such, there is interest in using geochemical proxies to fingerprint periods of major volcanism in the sedimentary record (termed here LIP marks). The use of sedimentary mercury (Hg) contents has been suggested to be the best tool to accomplish this goal, and recent work is reviewed here. Studies to-date show that most extinction events, ocean anoxic events, and other environmental crises through the Phanerozoic have an associated sedimentary Hg anomaly. It remains unclear though if each Hg anomaly is truly a signature of massive volcanism, or if it is controlled by local or regional processes. As Hg has a strong affinity to organic matter (OM), normalisation with total organic carbon (TOC) has been used to assess anomalies. The measurement of TOC has been fraught with error throughout many studies, leaving some claimed Hg/TOC anomalies questionable. Normalisation by other elements that can affect Hg sequestration, such as Al and S, are less common but warrant further investigation. Stable isotope systematics of Hg have helped to further clarify the origin of Hg spikes, and clearly show that not all Hg anomalies are directly related to volcanism. Although a promising tool, the Hg proxy requires more refinement to accurately understand the nuances of an Hg anomaly in the rock record. © 2019
关键词	Large Igneous Province Mass extinction Mercury spikes Ocean anoxic event
英文关键词	anoxic conditions; emission; geological record; large igneous province; mass extinction; mercury (element); sedimentary rock; volcanic eruption; volcanic gas; volcanism
语种	英语
来源期刊	Earth Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203440
作者单位	Geological Survey of Canada, Natural Resources Canada, 3303 33rd St NW, Calgary, AB T2L 2A7, Canada; Department of Geology and Environmental Geosciences, College of Charleston, Charleston, SC 29424, United States; State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China
推荐引用方式 GB/T 7714	Grasby S.E.,Them T.R.,II,et al. Mercury as a proxy for volcanic emissions in the geologic record[J],2019,196.
APA	Grasby S.E.,Them T.R.,II,Chen Z.,Yin R.,&Ardakani O.H..(2019).Mercury as a proxy for volcanic emissions in the geologic record.Earth Science Reviews,196.
MLA	Grasby S.E.,et al."Mercury as a proxy for volcanic emissions in the geologic record".Earth Science Reviews 196(2019).