湖南临湘虎形山矿区蚀变地球化学过程研究  

Geochemical process of alteration in the Huxingshan tungsten deposit in Linxiang city,Hunan province

作　　者：刘烨 赖健清[1,2] 徐军伟 肖文舟 LIU Ye;LAI Jianqing;XU Junwei;XIAO Wenzhou(Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological EnvironmentMonitoring, Ministry of Education, Central South University, Changsha 410083, China;School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;No. 247 Team of Hunan Nonferrous Geologial Exploration Bureau, Changsha 410129, China)

机构地区：[1]中南大学有色金属成矿预测与地质环境监测教育部重点实验室,长沙410083 [2]中南大学地球科学与信息物理学院,长沙410083 [3]湖南省有色地质勘查局二四七队,长沙410129

出　　处：《地质找矿论丛》2019年第2期187-195,共9页Contributions to Geology and Mineral Resources Research

基　　金：中南大学创新驱动项目(编号:2015CX008);中南大学中央高校基本科研业务专项(编号:2017zzts566)联合资助;中国地质调查局“整装勘查关键基础地质研究”计划项目(编号:12120114052701)

摘　　要：湖南省临湘市虎形山钨矿是近年来新发现的大型钨铍矿床。矿区内围岩蚀变类型较多,主要有云英岩化、硅化、绢云母化、碳酸盐化、绿泥石化等。为了探究矿区围岩蚀变与成矿的关系,对蚀变硅质板岩分别作了主微量元素分析,通过元素相关性分析探究了各元素的迁移特征,并探讨了主要蚀变过程中出现的矿化类型以及矿化过程中一些金属矿物的生成顺序;利用标准化Isocon图解法,对围岩蚀变过程中组分的带入带出进行质量平衡计算。研究结果表明,板岩中组分迁移受绢云母化影响强烈,其中云英岩化与成矿关系最为密切,碳酸盐化与钨矿化也有一定联系。通过对湘东北地区、虎形山矿区冷家溪群和上地壳W、Cu、Pb、Zn、As、Sb丰度值的对比,反映了矿区地层富含成矿物质,但并未给成矿提供物质来源。Huxingshan tungsten deposit in Linxiang city of Hunan is a large tungsten beryllium deposit discovered in the recent years.There are many types of wall rock alteration in the mining area.Greisenization,silicification,sericitization,carbonation,chloritization are the main ones.In order to explore the relationship between the alteration and mineralization this paper analyses main elements and trace elements of the altered siliceous slate.Correlative analysis is used to discuss migration characteristics of each elements,also mineralization types occurred in the main alteration processes and sequence of generation of metal minerals in the mineralization types discussed.Mass transfer between the host rock and the ore-forming fluid in the process of wall-rock was calculated by the normalized Isocon diagram method.The results show that sericitization has great influence on element migration of the the slate and greisenization is closely related to mineralization,carbonation related to tungsten mineralization.Comparison of the abundance of W,Cu,Pb,Zn,As,Sb of upper crust to those of Lengjiaxi group in the mining area in northeastern Hunan province reflects that strata in the mining area are rich in ore-forming material,but not the source for mineralization.

关 键 词：虎形山钨矿床 元素相关性 标准化Isocon图解法 云英岩化 湖南省 

分 类 号：P618.67[天文地球—矿床学]