哈图金矿蚀变岩型矿体特征及金赋存状态研究  

ORE CHARACTERISTICS AND OCCURRENCE OF GOLD MINERALS IN HATU GOLD DEPOSIT,NORTH XINJIANG

作　　者：邱添[1] 肖飞 张凤军 林彩香 王勇 安芳[1] 朱永峰[1] 

机构地区：[1]造山带与地壳演化教育部重点实验室,北京大学地球与空间科学学院,北京100871 [2]新疆西部矿业股份有限责任公司,新疆克拉玛依83400

出　　处：《新疆地质》2011年第2期155-161,共7页Xinjiang Geology

基　　金：西部黄金有限责任公司哈图金矿成矿规律研究项目;国家国际科技合作项目(2010DFB23390)联合资助

摘　　要：哈图金矿由石英脉型和蚀变岩型矿体组成,蚀变岩型矿体遭受了强烈黄铁矿化、毒砂化、碳酸盐化、硅化和绢云母化蚀变.成矿作用划分5个阶段:钠长石-石英阶段(I)、黄铁矿-碳酸盐-石英阶段(II)、黝铜矿-黄铜矿-自然金阶段(III)、毒砂-碳酸盐-绢云母阶段(IV)和方解石-石英阶段(V).其中,II—IV阶段是主要金成矿阶段.哈图金矿含金矿物主要为自然金,平均成色912.自然金呈裂隙金、包裹金、粒间金形式嵌布在黄铁矿和毒砂中.当载金矿物为黄铁矿时,自然金与黝铜矿-黄铜矿-闪锌矿关系密切;当载金矿物为毒砂时,自然金与黄铁矿-黄铜矿关系密切.The Hatu gold deposit, locating in west Junggar of Xinjiang, is composed of quartz vein type orebody and alteration type orehody. The orebodies are hosting in tuff and basalt in Lower Carboniferous volcano-sedimentary rocks. We study the alteration-type orebody which mainly locates in the deep part of Hatu mine.Pyritization, arsenopyritization, carbonation,sericitization and chloritization are widespread in the alteration-type orebody.The ore-forming process of alteration-type orebody can be divided into five stages：albite-quartz stage （I）;pyrite-carbonate-quartz stage （II）; tetrahedrite-chalcopyrite-native gold （III）;arsenopyrite-carbonate-sericite stage （IV）;calcite-quartz stage （V）.Stage II-IV are the main periods of gold deposition.The essential gold mineral of Hatu deposit is native gold with average gold content of 91.2%.Native gold in the major auriferous minerals （pyrite and arsenopyrite） occurs in the intergranular, crevice and enclosure forms. The native gold - tetrahedrite - chalcopyrite - sphalerite assemblages can be enclosed by pyrite or fill the fractures of pyrite.The native gold-pyrite-chalcopyrite can be enclosed by arsenopyrite or fill the fractures of arsenopyrite.

关 键 词：哈图金矿 自然金 黄铁矿 毒砂 

分 类 号：P618.51[天文地球—矿床学]