气候变化领域集成服务门户(CCPortal): Enrichment of chalcophile elements in seawater accompanying the end-Cretaceous impact event

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DOI	10.1130/B35403.1
	Enrichment of chalcophile elements in seawater accompanying the end-Cretaceous impact event
	Maruoka T.; Nishio Y.; Kogiso T.; Suzuki K.; Osawa T.; Hatsukawa Y.; Terada Y.
发表日期	2020
ISSN	167606
起始页码	2055
结束页码	2066
卷号	132 期号:2021-09-10
英文摘要	Chalcophile elements are enriched in the Cretaceous-Paleogene (KPg) boundary clays from Stevns Klint, Denmark. As the concentrations of Cu, Ag, and Pb among several chalcophile elements such as Cu, Zn, Ga, As, Ag, and Pb are correlated with those of Ir, we suggest that these elements were supplied to the oceans by processes related to the end-Cretaceous asteroid impact. Synchrotron X-ray fluorescence images revealed that Cu and Ag exist as trace elements in pyrite grains or as 1-10-μm-sized discrete phases specifically enriched in Cu or Ag. The difference in carrier phases might depend on the materials that transported these elements to the seafloor. Based on their affinities with Cu, Ag, and Ir, iron oxides/hydroxides and organic matter were identified as the potential carrier phases that supplied these elements to the seafloor. Chalcophile elements adsorbed on iron oxides/hydroxides might have been released during reductive dissolution of iron oxides/hydroxides and incorporated into the pyrite produced simultaneously with the reductive dissolution of iron oxides/hydroxides. Both iron oxides/hydroxides and chalcophile elements were possibly released from the KPg target rocks (i.e., sedimentary rocks and/or basement crystalline rocks) by impact heating. Elements with a high affinity to organic matter would have been released upon its degradation and then converted into discrete minerals because of the deficiency in Fe ions. As such discrete minerals include the elements that form acid soluble sulfides such as Cu, Ag, and Pb, enrichment of these elements might have been induced by the intense acid rain just after the end-Cretaceous asteroid impact. © 2019 Geological Society of America.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184716
作者单位	Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba City, Ibaraki, 305-8572, Japan; Faculty of Agriculture and Marine Science, Kochi University, Monobe B200, Nankoku, Kochi, 783-8502, Japan; Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan; Japan Agency for Marine-Earth Science and Technology, Yokosuka, Kanagawa, 237-0061, Japan; Japan Atomic Energy Agency, Tokai-mura, Naka-Gun, Ibaraki, 319-1195, Japan; National Institutes for Quantum and Radiological Science and Technology, Tokai-mura, Naka-gun, Ibaraki, 319-1106, Japan; Japan Synchrotron Radiation Research Institute, Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
推荐引用方式 GB/T 7714	Maruoka T.,Nishio Y.,Kogiso T.,et al. Enrichment of chalcophile elements in seawater accompanying the end-Cretaceous impact event[J],2020,132(2021-09-10).
APA	Maruoka T..,Nishio Y..,Kogiso T..,Suzuki K..,Osawa T..,...&Terada Y..(2020).Enrichment of chalcophile elements in seawater accompanying the end-Cretaceous impact event.Bulletin of the Geological Society of America,132(2021-09-10).
MLA	Maruoka T.,et al."Enrichment of chalcophile elements in seawater accompanying the end-Cretaceous impact event".Bulletin of the Geological Society of America 132.2021-09-10(2020).