湖南省平江县万古金矿区大塘冲矿段地质特征及找矿方向  

Geological characteristics and prospecting direction of Datangchong Ore Section of Wangu Gold District in Pingjiang County,Hunan Province

作　　者：阳镇东 郑宇 文志林 黄赞 董国军 周剑琪 李欢[2] Yang Zhendong;Zheng Yu;Wen Zhilin;Huang Zan;Dong Guojun;Zhou Jianqi;Li Huan(Hunan Institute of Geological Disaster Investigation and Monitoring;School of Geosciences and Info-Physics,Central South University)

机构地区：[1]湖南省地质灾害调查监测所 [2]中南大学地球科学与信息物理学院

出　　处：《黄金》2023年第3期65-73,共9页Gold

基　　金：湖南省科技创新计划项目(2021RC4055)。

摘　　要：万古金矿区大塘冲矿段位于万古金矿区东部,是近年来新设立的金矿勘查区。在野外地质调查基础上,对大塘冲矿段的矿脉、矿体及矿石特征进行了详细研究,厘定了矿床类型及成因,探索了成矿规律,并指出了进一步的找矿方向。研究表明,大塘冲矿段内含金矿脉受控于北西(西)向断裂破碎带,断裂破碎带由构造角砾岩、石英细脉及蚀变板岩组成,倾向北(北)东。矿石构造主要为块状构造、角砾状构造、条带状构造、板状构造等,矿石结构包括碎裂结构、角砾状结构、显微鳞片变晶结构、镶嵌结构等。矿石类型以石英脉型、蚀变破碎板岩型、构造角砾岩型及蚀变板岩型为主。大塘冲矿段矿床成因类型为受断裂控制的岩浆期后远成中低温热液型,矿体富集在舒缓波状弯曲、断裂分支部位;北西(西)向和近东西向断裂或层间滑脱带,硅化、绢云母化、黄铁矿化、毒砂矿化、辉锑矿化、褪色化较强地段和Au、As、Sb、Hg等元素的组合异常及金的重砂异常是重要的金找矿标志。14号矿脉深部是成矿有利地段,具有较大找矿潜力。The Datangchong Ore Section of the Wangu Gold District is located in the east part of the Wangu Gold District.It is a newly established gold exploration area in recent years.Based on the detailed field geological survey,this paper determines the type and genesis of the deposit,explores the metallogenic regularity,and points out further prospecting direction.The research results show that the gold-bearing vein belts in Datangchong Ore Section are controlled by the NW(W)-trending and N(N)E-dipping fault fracture zone composed of structural breccia,quartz veinlets,and altered slate.The ore structures are mainly block structures,breccia structures,strip structures,slate structures,and so on.The ore textures include fragment texture,breccia texture,microscopic lepidoblastic texture,mosaic texture,and so on.The ore types are mainly quartz vein type,altered fractured slate type,structural breccia type,and altered slate type.The deposit genesis type of Datangchong Ore Section is a post-magmatic tele-mesothermal hydrothermal gold deposit controlled by fault structure,and the ore body is generally enriched in the gentle wavy bending and fault branches;NW(W)and near EW faults or interlayer detachment zones,sections with strong silicification,sericitization,pyritization,arsenopyrization,stibium mineralization,and tarnishing,and composite anomalies of Au,as,Sb,Hg and heavy sand anomalies of gold are important gold prospecting indicators.It is proposed that No.14 is a favorable ore-forming vein for further exploration,which has great prospecting potential.

关 键 词：构造控矿 脉状金矿床 成矿规律 找矿勘查 地质特征 找矿方向 

分 类 号：TD15[矿业工程—矿山地质测量] P618.51[天文地球—矿床学]