贵州水银洞金矿金的赋存状态  

Occurrence of gold in Shuiyindong gold deposit,Guizhou

作　　者：李国 皮桥辉[1,2] 韦朝文 吴建标 杨雄 李林威 LI Guo;PI Qiao-hui;WI Chao-wen;WU Jian-biao;YANG Xiong;LI Lin-wei(Guangxi Key Laboratory of Hidden Metallic Ore Deposit Exploration;College of Earth Sciences,Guilin Univeisity of Technology,Guilin 541006,China;Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]桂林理工大学有色及贵金属隐伏矿床勘查教育部工程研究中心,广西桂林541006 [2]桂林理工大学地球科学学院,广西桂林541006 [3]昆明理工大学国土资源工程学院,昆明650093

出　　处：《桂林理工大学学报》2019年第4期817-829,共13页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(41563004;41973042);广西自然科学基金项目(2017GXNSFAA198336;2018GXNSFAA281303);广西高等学校高水平创新团队及卓越学者计划项目

摘　　要：采用扫描电镜、电子探针显微分析等分析方法,对贵州水银洞金矿床中的主要载金矿物黄铁矿、毒砂进行形貌观察及成分分析。结果表明,Au以3种形式赋存于水银洞金矿床中:以超显微Au^+赋存于黄铁矿和毒砂晶格结构中;以"不可见"显微Au^0吸附在黄铁矿表面;以"可见"微米级自然金Au^0吸附在黄铁矿表面,或赋存于碳酸盐岩岩脉附近及岩脉中,粒径在0.5~200μm。Scanning electron microscopy and electron probe microanalysis were used to observe the morphology and composition analysis of the main gold-bearing minerals pyrite and arsenopyrite in Shuiyindong gold deposit in Guizhou.The results showed that Au occurs in three forms in Shuiyindong gold deposit.(1)Ultramicroscopic Au^+ is present in the pyrite and arsenopyrite lattice structure.(2)The"invisible"microscopic Au^0 is adsorbed on the pyrite surface.(3)"Visible"micron-sized natural gold Au^0 is adsorbed on the surface of pyrite,or found near and in carbonate veins,with a particle size of 0.5-200μm.

关 键 词：卡林型金矿 赋存状态 晶格金 自然金 水银洞金矿 

分 类 号：P618.51[天文地球—矿床学]