湖南常宁康家湾铅锌矿床角砾岩成因及其与成矿的关系  

Genesis of Breccia and its Relationship with Mineralization in the Kangjiawan Lead-zinc Deposit of Changning County,Hunan Province

作　　者：左昌虎[1,2] 屈金宝 左中勇[1] 左宗 李德鹏[1] 

机构地区：[1]湖南水口山有色金属集团公司,湖南衡阳421513 [2]内生金属矿床成矿机制研究国家重点实验室,南京大学地球科学与工程学院,江苏南京210093

出　　处：《地质与勘探》2016年第2期251-260,共10页Geology and Exploration

基　　金：中国地质调查局调查项目(编号:1212011085407)资助

摘　　要：康家湾铅锌矿是一个大型多金属矿床,矿区内发育有大面积角砾岩。本文在详细地质工作的基础上,参照前人研究成果,探讨了该角砾岩成因及其与成矿的关系。根据角砾成分和空间分布等特征,矿区内角砾岩可划分为层间硅化角砾岩(Qb)、岩溶角砾岩(Kb)、崩塌角砾岩(Ba)和断层角砾岩(Bf)四种类型。分析认为角砾岩主要由构造与热液双重作用形成,分别经历构造破碎、热液交代及后期岩溶改造三个阶段。矿体主要赋存于层间硅化角砾岩中,少量角砾状矿石赋存于岩溶角砾岩中。据上认为,该套角砾岩成因与康家湾铅锌矿具有密切成因关系。The Kangjiawan lead-zinc mine is a large-scale polymetallic deposit, with a large area of breccia. Based on detailed geological work and previous research, this paper analyzes the genesis of breccia and its relationship with mineralization in this deposit. According to composition and spatial distribution of breccia, it can be divided into four types, i.e. interlayer silicified breccia （Qb）, karst breccia （Kb）, collapse breccia （Ba） and fault breccia （Bf）. Our research suggests that breccia was produced by tectonic and hydrothermal dual function, which experienced three stages including tectonic fracturing, hydrothermal alteration and later karst-reformation. Ore bodies occurs mainly in the interlayer silicified breccia, while a small amount of brecciated in karst breccia. Thus the Kangjiawan lead-zinc deposit has a close genetic relationship with the interlayer silicified breccia.

关 键 词：角砾岩 类型及成因 与成矿的关系 康家湾铅锌矿床 湖南常宁 

分 类 号：P614[天文地球—矿床学]