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Enrichment of Multiple Elements and Depositional Environment of Selenium-rich Deposits in Yutangba, Western Hubei
Author(s): 
Pages: 271-282
Year: Issue:  2
Journal: ACTA SEDIMENTOLOGICA SINICA

Keyword:  渔塘坝湖北西部硒矿床硅质岩和页岩多元素富集缺氧或静海环境;
Abstract: 对采自湖北西部渔塘坝二叠系独立硒矿区的硅质岩和页岩样品进行了元素测试(微量元素、总铁、总有机碳、总硫),分析了该区域的多元素富集及沉积环境.该区域V、Cu、As、Cd、Tl、Se、Mo、V、Sb、U、Ag、Cr、Ni相对富集, Ba、Hf、Ta、W、Pb、Th相对贫化或亏损.全硫-全铁(TS-TFe)的关系表明页岩及部分硅质岩的S/Fe比值均大于1.15,说明有过量的硫存在,可能为有机硫或为其他亲硫元素沉淀提供条件.TOC-TS-TFe三角图及V/(V + Ni)表明该区域的岩石形成于缺氧或静海相环境.U/Th、Zr-Cr、P-Y等微量元素地球化学参数表明该区域有热水沉积的存在.通过对微量元素可能的来源研究分析,该区域的微量元素可能存在多种来源:热水来源、海水沉积、峨眉山玄武岩.
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