云南易门某铜矿矿床地质特征及控矿规律  

Geological Characteristics and Ore-controlling Regularity of a Certain Copper Deposit in Yimen County,Yunnan Province

作　　者：郭丽丽 刀艳 Guo Lili;Dao Yan(Wuhan University of Engineering Science;Geological Survey Institute of Yunnan Province)

机构地区：[1]武汉工程科技学院,湖北省武汉市430200 [2]云南省地质调查院

出　　处：《现代矿业》2019年第12期37-40,共4页Modern Mining

摘　　要：易门铜矿带是滇中地区重要的成矿地段,以层控型矿床闻名,大尖山矿床的发现,弥补了矿体热液脉状铜矿的空缺。为深入阐明矿床成因机制,在前人对矿带研究工作的基础上,结合成矿地质背景,详细分析了矿床地质特征及成矿规律。结果表明①矿床内矿化自鹅头厂组至因民组均有发育,以落雪组白云岩中最为富集;②受区域构造影响,矿区内断裂构造发育,发育NNW向、NWW先及近SN向3组断层,节理、裂隙发育,严格控制着矿(化)体的空间分布及富集;③矿床属典型的热液脉型铜矿床,构造交汇部位、围岩蚀变(硅化)、落雪组地层及物化探异常为“大尖山式”矿体的有利找矿标志。Yimen copper belt is a significant metallogenic belt in Central Yunnan Province,which famous for its stratabound deposits.The excavation of Dajianshan copper deposit makes up the weakness of hydrothermal-vien type deposit.In order to study the genetic mechanism of ore deposit,the geological characteristics and metallogenic regularity of deposit are analyzed in depth,based on the detail analysis of the geological working results of the ore belt.In addition,the geological background of mineralization is also discussed.The results indicated that:①the mineralzation are occurred in every formations,including Etouchang Formation and Luoxue Formation,and the richest strata is the dolomite in Luoxue Formation;②affected by regional tectonic activities,the fault structures are developed in the mining area,which directions are mainly tending for NNW,NWW and near SN.Besides,the mining area is characterized by joint crack development,the mineralization is strictly controlled by these structures;③he deposit is a typical hydrothermal vein copper deposit,the intersection part of faults,wall-rock alteration(silicigication),Luoxue Formation and geophysical-geochemical anomalies can be regarded as the favorable prospecting indicators of the mining area.

关 键 词：铜矿床 热液脉型 矿床成因 找矿靶区 

分 类 号：P61[天文地球—矿床学]