摘要
乐马厂银矿为地矿部“八五”重点普查项目，普查找矿取得了突破性进展，矿床达大型规模。该矿床类型独特，为国内、外少见的独立银矿床，因此对矿床地质特征和矿床赋存规律进行了较深入研究，取得了新的认识。文章在乐马厂银矿床地质背景基础上，着重研究了该矿床的地质特征及成矿地质作用，并论述了其为产于叠瓦状逆冲－推覆断裂破碎蚀变带中的独立银矿床，其矿化作用过程经历了古构造－沉积（矿源层形成）和构造－热液（充填交代富集）两个阶段，构造活动控制了银矿化作用和银矿体的最终定位。这对在滇东北地区寻找此类银、铅锌矿床具有指导意义。
The study of the Lemachang silver deposit was a major reconnaissance project for 8th“Five Year Plan” assigned by Ministry of Geology and Mineral Resources.The reconnaissance and ore prospecting made remarkable breakthrough,and the ore deposit was proved to be of large size.Based on years of field practice,the authors found that the ore deposit is an independent silver deposit rarely seen both in China and abroad,thus belonging to a unique type.Through a thorough study of the geological characteristics and the mode of occurrence of the ore deposit,the author has also acquired some new understanding.According to the geological setting of the Lemachang silver depisit,this paper deals emphatically with geological characteristics and ore forming geological activity of the ore deposit,and points out that the Lemachang deposit is an independent silver deposit in a shatter alteration zone of imbricated thrusting napping faults,with its mineralization expriencing the paleostructure sedimentation(the formation of the source bed) stage and the strcutral hydrothermal(filling metasomatic enrichment)stage,and the structural activity controlling the silver mineralization and the eventual location of the silver orebody.All these opinions are of important indicating significance in the prospecting of silver and lead zinc deposits in northeastern Yunnan.
出处
《矿床地质》
CAS
CSCD
北大核心
1999年第2期121-128,共8页
Mineral Deposits
基金
地矿部重点普查项目
关键词
成矿作用
乐马厂
鲁甸县
银矿床
地质特征
geology and silver deposit,ore forming process,Lemachang,Ludian County in Yunnan Province
