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地球学报  2006 

西南天山布隆金矿床成矿作用同位素地质年代学

DOI: 10.3975/cagsb.2006.01.07

Keywords: 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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Abstract:

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。

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