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内蒙古哈达门沟金矿床28号矿脉流体包裹体研究

发表时间:2017-03-31  浏览量:1480  下载量:209
全部作者: 葛战林,章永梅
作者单位: 中国地质大学(北京)地球科学与资源学院;武警黄金第八支队
摘 要: 对哈达门沟金矿床28号矿脉4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。结果表明,包裹体以气液两相水溶液包裹体、含子晶多相包裹体和CO2-H2O三相包裹体为主,含少量纯液相水溶液包裹体、纯气相水溶液包裹体和纯液相CO2包裹体。成矿流体属于中高温、中等盐度、中等密度流体,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发现,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: 矿床学与矿相学;流体包裹体;岩相学特征;显微测温;CO2流体;哈达门沟金矿床
Title: Fluid inclusion study of vein No.28 in Hadamengou gold deposit, Inner Mongolia
Author: GE Zhanlin, ZHANG Yongmei
Organization: School of Earth Sciences and Resources, China University of Geosciences (Beijing); Eighth Detachment of Gold Exploration Branch of Armed Police
Abstract: Petrography and microthermometry were used to study fluid inclusions in 4 hydrothermal mineralization stages of vein No.28 in Hadamengou gold deposit systematically. It shows that there are three main types of fluid inclusions, including gas-fluid inclusions, daughter mineral-bearing inclusions and CO2-H2O three-phase inclusions. A small amount of pure liquid H2O inclusions, pure gas H2O inclusions and pure liquid CO2inclusions can also be observed. Hadamengou gold deposit belongs to medium-high temperature, medium salinity and medium-density hydrothermal mineralization and it formed in medium-deep ore-forming environment. During the process of gold mineralization, CO2 fluid prompted the gold in source bed to be activated and translated into soluble gold and provided important conditions for the complexing migration of the reductive sulfur and gold. Comparison of the characteristics of ore-forming fluid in both Hadamengou gold deposit and Liubagou gold deposit shows that they are very similar in both the nature and the evolution laws, and the two deposits also have the common source of ore-forming fluid.
Key words: ore deposit geology and mineralography; fluid inclusion; petrological characteristics; microthermometry; CO2 fluid; Hadamengou gold deposit
发表期数: 2017年3月第6期
引用格式: 葛战林,章永梅. 内蒙古哈达门沟金矿床28号矿脉流体包裹体研究[J]. 中国科技论文在线精品论文,2017,10(6):662-671.
 
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