| 淘金冲金矿成矿流体地球化学和矿床成因研究 |
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| 引用本文：.1994.Ore-forming fluid geochemistry and genesis of the Taojinchong gold deposit[J].Mineral Deposits,13(2):156~162 |
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| 基金项目:国家自然科学基金和国家教委博士点基金资助项目 |
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| 中文摘要:包裹体地球化学和氢氧同位素研究结果表明，淘金冲金矿床成矿溶液为中低温、中压、弱碱性和还原性的Ca-Mg-C-S体系，成矿溶液早期以变质水为主，中晚期则以建造水为主（大气降水来源），明显具混合成因特点，其矿床成因类型属受地下水改造成因的层控金矿或特征的“江南型”金矿。 |
| 中文关键词:淘金冲金矿 包裹体地球化学 氢氧同位素 矿床成因 |
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| Ore-forming fluid geochemistry and genesis of the Taojinchong gold deposit |
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| Abstract:According to geochemical studies of inclusions in the Taojinehong gold Deposit, the ore-forming temperature of the deposit is 130～230℃, its ore-forming pressure is some 60～80 MPa, its cations in the ore-forming solution are mainly Ca2+ and Mg2+, its anions are chiefly HCO3- and HS-, its salinity is 3％～8％ NaCl, its density is 0.88～0.97 g/cm3, and its ore-formingsolution shows weakly alkaline and reducing behaviors. In the ore-forming solution, gold is transported mainly in the form of [Au(HS)2]-, and the precipitation of gold is mainly attributed to the decrease in temperature, pressure, pH value and ∑S concentration. Hydrogen and oxygen isotope studies of the ore deposit show that the ore-forming solution is dominated by metamorphio water at the early stage and by formation water derived from meteoric water at the middle-late stage, showing obvious character of mixed genesis. The Taojinchong gold deposit derived its ore-forming materials from ore-control strata and its ore-forming energy from Xuefengian tectonism and metamorphism. Genetically, it is a stratabound gold deposit that has undergone reformation by groundwater or a characteristic"Jiangnan" type gold deposit. |
| keywords:the Taojinchong gold deposit, inclusion geochemistry, hydrogen and oxygen isotopes, genesis of the ore deposit |
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