柬埔寨KW铜金矿床地质特征及控矿条件  

Geological characteristics and ore controlling conditions of KW copper-gold deposit in Cambodia

作　　者：张雪亮[1] 牛聪聪[1] 赵俊宏[1] 宁庚陈 

机构地区：[1]中国有色桂林矿产地质研究院有限公司,广西桂林541004

出　　处：《矿产与地质》2014年第2期191-195,共5页Mineral Resources and Geology

摘　　要：柬埔寨 KW 铜金矿床产于安山质火山岩中,矿化受 NE-NNE 向断裂控制,为中低温热液脉型矿化；矿体一般长80～640m,厚0.13～7.05m,品位 Cu0.56%～3.48%,Au0.36×10-6～2.56×10-6；矿石金属矿物以黄铜矿、黄铁矿、毒砂为主,非金属矿物以石英为主,含少量绢云母、绿泥石、方解石等,近矿围岩蚀变以硅化-绢云母化-绿泥石化。矿区安山岩属高钾低钠的钙碱性岩类,矿石与安山岩有相似的稀土配分特征,显示成矿与安山质岩浆活动有密切的成因联系。矿区青磐岩化、细脉状石膏较为普遍,显示可能存在与次火山岩体有关的蚀变岩型矿化,该类型矿化是下一步找矿突破的重要方向。KW copper gold deposit in Cambodia is controlled by NE-NNE trending faults in the andesitic vol-cano rocks,with hydrothermal vein type mineralization of low to moderate temperature.The orebody is gen-erally 80～640 meters long,0.13～7.05 meters thick,with grade Cu 0.56%～3.48% and Au（0.36～2.56） ×10 -6 .The metal minerals are mainly chalcopyrite,pyrite and arsenopyrite.The non-metallic mineral is mainly quartz with a small amount of sericite,chlorite and calcite.The wall rock alterations are silicification, sericitization and chloritization.Andesite is belonged to calc alkaline type with high potassium and low sodi-um.The ore is similar to andesite in REE pattern characteristics.The mineralization has close genetic rela-tionship with andesitic magma activity.For propylitization,veinlets gypsum are relatively common in the mine,it suggests that the altered rock type mineralization is possibly related to the volcanic rock.The miner-alization type is an important direction for the prospecting achievement in the future.

关 键 词：铜金矿床 矿床地质特征 控矿条件 柬埔寨 

分 类 号：P618.51[天文地球—矿床学]