云南芦子园铅锌矿区构造期次划分及其控矿特征

THE STRUCTURE PHASE DIVISION AND ORE CONTROL FEATURE OF LUZIYUAN PB-ZN OREFIELD IN YUNNAN

云南芦子园铅锌多金属矿床属于超大型矽卡岩型矿床。矿体产于上寒武统沙河厂组(∈3s)大理岩与板岩层间破碎带中,构造控矿明显。矿区主要经历三期构造活动,早期为北东向压扭性断裂,是矿区的主要导矿和容矿构造,控制了矿体的空间展布;中期为北西向张扭性断裂,晚期为近东西向张性,中-晚期断裂为破矿构造,错断北东向断裂及矿体。

Luziyuan Pb-Zn multimetallic deposit in Yunnan is a superlarge skarn deposit.The orebody is in the fracture zone between Upper Cambrian Shahechang Formation(∈ 3 sh)marble and slate,ore control of structure clear.The orefield has experienced of 3 structure movements.The early one is NE pressure torsion fault,which is the main ore transmit,and bearing structure,controlling the space distribution of orebody;the mddle is NW tension torsion fault;the later is near EW tension.Thr middle an later ones are the ore break structure,cutting NE fault and orebody.