| 西南天山布隆金矿床成矿作用同位素地质年代学 |
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| 引用本文：杨建国,杨林海,吕昌国,李智佩,于浦生.2006.西南天山布隆金矿床成矿作用同位素地质年代学[J].地球学报,27(1):51-55. |
| DOI：10.3975/cagsb.2006.01.07 |
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| 基金项目:中国地质调查局基金项目“西南天山矿产资源潜力综合评价”(编号:199910200249) |
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| 中文摘要:位于新疆西南天山阿合奇县的布隆金矿是一个国内较少见的低温热液石英重晶石脉型金矿床,它赋存于上泥盆统细碎屑岩中,金矿体受层间缓倾斜破碎带控制。根据矿脉矿物组合及相互穿插关系,原生成矿期成矿作用可分为:①黄铁矿-石英阶段;②石英-黄铁矿-菱铁矿-重晶石阶段;③方解石-石英-重晶石阶段和④重晶石阶段。年代学研究表明,主成矿阶段(②阶段)含金石英脉RB-SR等时线年龄为258±15MA,表明成矿作用发生在晚二叠世末,与中亚南天山大规模的金成矿作用发生时期相一致。 |
| 中文关键词:石英重晶石脉型金矿床 成矿作用年代学 布隆 西南天山 新疆 |
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| Isotopic Geochronology of Minerogenesis of the Bulong Gold Deposit in Southwestern Tianshan Mountains |
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| Abstract:The Bulong gold deposit, located in the southwestern Tianshan Mountains, Xinjiang Uygur Autonomous Region, is a rare epithermal quartz-barite vein-type gold deposit in China. It occurs in Devonian fine clastic rocks and is controlled by fractures zones. According to the mineral assemblages and intercalated relationship, minerogenesis of protogene mineralization phase can be divided into: ① pyrite-quartz stage; ② quartz-pyrite-siderite-barite stage; ③ calcite-quartz-barite stage; ④ barite stage. Chronology study showed that the Rb-Sr isochron age of auriferous quartz of the main mineral stage(②) is 258±15 Ma and the minerogenesis happened between Late Permian epoch and Early Triassic epoch. So it is in accordance with the tremendous minerogenesis of South Tianshan Mountains in Central Asia. |
| keywords:quartz-barite vein-type gold deposit isotopic geochronology for mineralization Bulong southwestern Tianshan Mountains Xinjiang |
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