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Geology and geochemistry of Carlin-type gold deposits in China
Hu Rui-Zhong;  Su Wen-Chao;  Bi Xian-Wu;  Tu Guang-Zhi;  Albert H. Hofstra
2002
Source PublicationMineralium Deposita
Volume37Pages:378–392
Abstract

The Carlin-type gold deposits in China lie mostly near the margins of the Proterozoic Yangtze and Aba cratons. Submicron-sized gold in micron-sized arsenian pyrite is disseminated in fractured Cambrian through Triassic carbonaceous shale and carbonate rocks, and is associated with anomalous Hg, Sb, As, U, and Tl. Alteration typically includes silicification, argillization, and sulfidation. Aqueous fluid inclusions contain CO2, have relatively low temperatures of homogenization (250–150 °C), and salinities (8–2 wt% equiv. NaCl) that typically decrease from early to later stages. The indicated pressures of 105–330×105 Pa correspond to depths in excess of 1.0 to 3.0 km, assuming hydrostatic conditions. The δD values of fluid inclusions (–87 to –47‰) and the calculated δ18O values for water in ore fluids (–2.1 to 16.2‰) reflect interactions between meteoric water and sedimentary rocks. The δ13C values of calcite (–9 to 2‰) and δ34S values of sulfides (–24 to 17‰) suggest that C and S were derived from marine carbonate (and organic carbon) and diagenetic sulfides (and organic sulfur) in the vicinity of the deposits. Geologic relationships and geochronologic evidence indicate the deposits formed during a late phase of the Yanshanian orogeny (140–75 Ma).

KeywordCarlin China Gold Yangtze Crate
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8323
Collection矿床地球化学国家重点实验室
Affiliation1.Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002, P.R. China
2.US Geological Survey, MS-973,US Geological Survey, MS-973,
Recommended Citation
GB/T 7714
Hu Rui-Zhong;Su Wen-Chao;Bi Xian-Wu;Tu Guang-Zhi;Albert H. Hofstra. Geology and geochemistry of Carlin-type gold deposits in China[J]. Mineralium Deposita,2002,37:378–392.
APA Hu Rui-Zhong;Su Wen-Chao;Bi Xian-Wu;Tu Guang-Zhi;Albert H. Hofstra.(2002).Geology and geochemistry of Carlin-type gold deposits in China.Mineralium Deposita,37,378–392.
MLA Hu Rui-Zhong;Su Wen-Chao;Bi Xian-Wu;Tu Guang-Zhi;Albert H. Hofstra."Geology and geochemistry of Carlin-type gold deposits in China".Mineralium Deposita 37(2002):378–392.
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