内蒙古哈达门沟金矿床28号矿脉流体包裹体研究
首发时间:2016-09-30
摘要:对哈达门沟金矿床28号矿脉四个热液成矿阶段的流体包裹体进行系统的岩相学、显微测温研究,研究表明:包裹体以气液两相水包裹体、含子矿物多相包裹体和CO2-H2O三相包裹体为主,含少量纯液相水、纯气相水和纯液相CO2包裹体。成矿流体属于中高温、中等盐度、中等密度范围,成矿作用发生在中深成环境。CO2 流体在本区金成矿作用过程中,促使矿源层的金活化并转化为可溶解性金,为还原硫与金的络合迁移提供了重要条件。与柳坝沟金矿床的成矿流体特征对比表明,两者成矿流体性质及演化规律相似,具有共同的流体来源。
关键词: 流体包裹体 岩相学特征 显微测温 CO2流体 哈达门沟金矿床
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Fluid inclusion study of vein No.28 in the Hadamengou gold deposit,Inner Mongolia
Abstract:Petrography and microthermometry were used to study fluid inclusions in No.28 vein of the Hadamengou deposit systematically. It shows that the inclusions of fluid-rich, multiphase with daughter mineral-bearing and CO2-H2O three-phase are three main types of fluid inclusion, a small amount of pure liquid inclusions and pure gas phase inclusions can also be observed, the amount of pure liquid CO2 is the least. The Hadamengou gold deposit belongs to medium-high temperature, medium salinity and medium-density hydrothermal mineralization and formed in the medium-deep ore-forming environment. During the process of gold mineralization, CO2 fluids prompt the gold in source bed being activated and translated into soluble gold and provide important conditions for the complexing migration of the reductive sulfur and gold. The characteristics of ore-forming fluids comparison in both the Hadamengou gold deposit and the Liubagou gold deposit show that they are very similar in the nature and evolution of ore-forming fluid, are common in the source of ore-forming fluids.
Keywords: fluid inclusion petrological characteristics microthermometry CO2 fluid Hadamengou gold deposit
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No.4705532116505214****
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