云南易门县铜厂铜矿床成矿规律及找矿预测  

Metallogenic regularity and prospecting forecast of Tongchang copper deposit in Yimen County of Yunnan

作　　者：余璨 赵向东 吕晓宏 YU Can;ZHAO Xiangdong;LYU Xiaohong(Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co.,Ltd.,Kunming 650051,Yunnan,China)

机构地区：[1]中国有色金属工业昆明勘察设计研究院有限公司,云南昆明650051

出　　处：《矿产与地质》2021年第6期1031-1038,共8页Mineral Resources and Geology

基　　金：中铝国际重点科技项目“复杂采空区联测关键技术及稳定性‘DME’评价体系研究”(编号:CJ2018JS-14)资助。

摘　　要：铜厂铜矿床位于扬子陆块西南缘,地层出露齐全,地质构造发育,岩浆活动频繁,变质作用显著,成矿地质条件优越。在对铜厂矿床成矿地质背景、矿床地质特征、控矿因素总结的基础上,本文系统厘定矿床矿化类型,认为矿区发育沉积-成岩型及热液脉型两种铜矿化类型。结合三维地质建模及地质统计学数据对矿区铜成矿规律进行探讨,矿(化)体的空间分布、矿化富集程度严格受岩相古地理、地层岩性及地质构造所控制,铜矿石品位空间分布规律与矿区“两凹夹一隆”的构造格局一致。推测铜厂矿床西侧存在大量沉积-成岩型盲矿体,新庄、小马山一带则是寻找热液脉状铜矿体的主要找矿靶区。Tongchang copper deposit is located at the southwestern margin of Yangtze Block,which is characterized by completely developed strata,structural development,frequent magmatic activity,obvious regional matamorphism and superior metallogenic condition.According to the metallogenic and geological background,geological characteristics and ore-controlling factors in the deposit,this paper gives a systematic summary of the mineralization types,and suggests that the there have been identified for two mineralization types,sedimentary-diagenesis copper mineralzation and hydrothermal vein copper mineralization types.In addition,the ore-forming regularity has been discussed on the basis of three-dimensional technology and geostatistical data,and the spatial distribution of mineralization and accumulation degree are strictly controlled by lithoface paleogeography,stratum lithology and geological structure.The grade distribution feature has been controlled by the structural framework as“one uplift zone foldered by two hollow zones”.It is speculated that there are a large number of sedimentary-diagenetic blind orebodies on the west side of Tongchang deposit.The Xinzhuang area and Xiaomashan area are the main prospecting target zones to explore for hydrothermal vein copper orebodies.

关 键 词：铜厂矿床 矿化类型 成矿规律 找矿预测 云南易门 

分 类 号：P618.41[天文地球—矿床学]