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Isotopic Variability of Mercury in Ore Mine-Waste Calcine and Leachates of Mine-Waste Calcine from Areas Mined for Mercury

机译：汞矿石矿山煅烧炉中的汞的同位素变异性以及矿山汞矿的浸出液中汞的同位素变异性

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The isotopic composition of mercury (Hg) was determined in cinnabar ore, mine-waste calcine (retorted ore), and leachates obtained from water leaching experiments of calcine from two large Hg mining districts in the U.S. This study is the first to report significant mass-dependent Hg isotopic fractionation between cinnabar ore and resultant calcine. Data indicate that δ202Hg values relative to NIST 3133 of calcine (up to 1.52‰) in the Terlingua district, Texas, are as much as 3.24‰ heavier than cinnabar (−1.72‰) prior to retorting. In addition, δ202Hg values obtained from leachates of Terlingua district calcines are isotopically similar to, or as much as 1.17‰ heavier than associated calcines, most likely due to leaching of soluble, byproduct Hg compounds formed during ore retorting that are a minor component in the calcines. As a result of the large fractionation found between cinnabar and calcine, and because calcine is the dominant source of Hg contamination from the mines studied, δ202Hg values of calcine may be more environmentally important in these mined areas than the primary cinnabar ore. Measurement of the Hg isotopic composition of calcine is necessary when using Hg isotopes for tracing Hg sources from areas mined for Hg, especially mine water runoff.
机译：从美国两个大型汞矿区的煅烧水浸出实验获得的朱砂矿石，矿山废煅烧（干馏矿石）和浸出液中确定了汞的同位素组成。该研究是首次报道大量汞砂矿和所得煅烧矿之间的汞依赖性Hg同位素分馏。数据表明，在蒸馏之前，相对于得克萨斯州特灵格阿地区的煅烧NIST 3133（最高1.52‰）的δ 202 Hg值比朱砂（−1.72‰）重3.24‰。 。此外，从Terlingua地区煅烧炉的渗滤液中获得的δ 202 Hg值与相关煅烧炉的同位素相似，或比其重约1.17‰，这很可能是由于在此过程中形成的可溶性副产物Hg化合物的浸出所致。矿石煅烧是煅烧中的次要成分。由于朱砂和煅烧石之间存在较大的分馏作用，并且由于煅烧矿是研究矿山中汞污染的主要来源，因此煅烧矿山的δ 202 Hg值在环境中可能更为重要比朱砂原矿要高。当使用汞同位素从汞开采地区（尤其是矿泉水径流）中追踪汞来源时，必须测量煅烧炉中汞的同位素组成。

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