| 新疆包古图金矿床特征及其成因 |
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| 引用本文：.1992.Characteristics And Genesis Of Gold Deposits In Baogutu, Xinjiang[J].Mineral Deposits,11(2):154~164 |
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| 中文摘要:西准噶尔包古图地区已发现20多个金矿床和矿点，它们与海西期发育的闪长质小岩体群和脉岩群有密切的成因联系。为石英脉-网脉型矿脉，其分布受北东向裂隙控制，无论侧向还是纵向都呈平行排列和成群出现。含金矿物是自然金和银金矿。经石英和黄铁矿的气液包裹体测试表明，金矿化温度170～305℃，平均222℃；矿化条件为还原和酸性环境；矿液主要为岩浆热液和大气降水。 |
| 中文关键词:闪长质岩浆 石英脉-网脉型 物理化学条件 矿床成因 |
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| Characteristics And Genesis Of Gold Deposits In Baogutu, Xinjiang |
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| Abstract:More than 20 gold deposits and occurrences have been discovered in Baogutu area, west Junggar. They are closely related to Hercynian dioritic intrusive groups and vein groups. Ore veins are of quartz vein type and stockwork type, which are in parallel arrangement both laterally and vertically with their distribution strictly controlled by NE-trending fissures. Decrepitation temperatures of inclusions in quartz and pyrite show that mineralization temperatures of native gold are 170～305℃, averaging 222℃. Chemical composition of ore minerals also implies that the mineralization temperature of native gold is low. Thermoelectricity of pyrite is mainly of P type and, next, mixed P and N type. Fluid inclusion composition of minerals indicates a reducing and acid mineralization environment. Hydrogen and oxygen isotopic composition demonstrates that mineralizing fluids are magmatic water and meteoric water. |
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