浙江苍南龙船坞铅锌银矿床地质特征及成因分析

Geological characteristics and genesis discussion of Longchuangwu Lead-Zinc-Silver deposit in Cangnan county,Zhejiang province

龙船坞铅锌银矿区地处华南褶皱系浙东南隆起区,位于浙江苍南县城—灵溪镇一带。矿区出露地层为一套酸性火山碎屑岩,构造以断裂构造为主,构造方向为北西向和北东向,北东向是矿区主要赋矿构造。银铅锌矿体沿构造断裂带充填,呈透镜状,分布极不均匀。物质来源为深部热液上升与下渗大气降水,改变了流体原来的盐度、压力、pH、Eh值,使矿质沉淀形成矿体。

Longchuanwu mining area,which belongs to Southeast Zhejiang uplift area of South China fold system,is located around Cangnan County-Lingxi Town in Zhejiang province.The strata in the mining area are acidic pyroclastic rocks;the structures in the mining area are mainly northwest and northeast strike faults;and the northeast strike structures control the orebodies.Lead-zinc-silver orebodies are hosted in the fault zone;the shape of orebodies is lenticular;and the distribution of orebodies is very nonuniform.The material source of ore is from uplifted hydrothermal fluid in the deep and infiltrated meteoric water,which change the original salinity,pressure,temperature,pH and Eh value,then minerals are deposited forming orebodies.