甘肃省金塔县西铅炉子铅锌矿地质特征及矿床成因

Geological characteristics and genesis of West lead furnace lead zinc ore in Jinta county Gansu province

甘肃省金塔县西铅炉子铅锌矿位于桥湾-西铅炉子华力西期Au、Fe、W、Pb、Zn、Cu成矿带东端,矿体受NEE向断裂控制,断裂带充填大量石英脉体,矿石主要为石英脉型铅锌矿矿石,矿体主要呈脉状、透镜状产出,赋存于长城系铅炉子沟群上组下岩段的(角岩化)泥质板岩、粉砂质板岩夹大理岩透镜体中。金属矿物以方铅矿、闪锌矿为主,次为黄铜矿、黄铁矿等,围岩蚀变主要有硅化、退色、绢云母化、绿泥石化、碳酸盐化、高岭土化、石膏化等。其成因类型为受断裂控制的中低温热液铅锌矿床。找矿标志为石英脉、闪长玢岩脉发育的北西西向构造蚀变带。

West lead furnace lead zinc ore in Jinta county Gansu province is located in the Qiaowan-west lead stove variscan Au、Fe、W、Pb、Zn、Cu、zinc,The eastern end of the metallogenic belt,ore body by the NEE to fracture control,fault zone,filling a large quartz vein body minerals are mainly quartz vein type lead and zinc ore,ore body main vein,lenticular output,occurrence lead they fasten furnace under the groove on the group of group of rock(lithification)argillaceous slate,silty slate clip in the marble lens.Metallic minerals are mainly galena and sphalerite,followed by chalcopyrite and pyrite,etc.,and wall rock alteration mainly includes silicification,discoloration,sericitization,chlorinization,carbonation,kaolinization,gypsumization,etc.The genesis type is low-medium temperature hydrothermal lead-zinc deposit controlled by fracture.The prospecting indicator is the nw structural alteration belt of quartz vein and diorite porphyrite vein.