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- W1994578280 abstract "The microdisseminated gold deposits at La'erma and Qiongmo are typically hosted in Cambrian chert formation in western Qinling Mountains, China. Both in the host rocks and the gold ores selenium is present in high abundance, as selenide minerals or isomorphous admixtures in sulfides, with independent selenium orebodies can be delineated in some localities. Intergrowth of selenides and native gold is commonly observed. Selenium is also noticed in considerably high content in fluid inclusions in quartz and barite, which are closely related to gold mineralization. Studies show that gold and selenium may have been transported together in ore solutions as Au–S–Se complex. In view of the wide difference in electrode potential between selenium and sulfur, the two elements would be separated under oxidizing conditions. Selenium would mostly occur as isomorphic mixtures in sulfides during the early stage of mineralization when the environment is more reducing but would precipitate as selenides during the late, oxidizing stage. Simultaneous enrichment of gold and selenium would be favored by boiling of the ore solution or mixing of ore solution with oxygen-rich water at shallow depths." @default.
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- W1994578280 date "2000-09-01" @default.
- W1994578280 modified "2023-10-05" @default.
- W1994578280 title "Geochemistry of the La'erma and Qiongmo Au–Se deposits in the western Qinling Mountains, China" @default.
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- W1994578280 doi "https://doi.org/10.1016/s0169-1368(00)00008-1" @default.
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