湖南宁远银山咀铅锌矿地质特征及成矿条件分析

Geological characteristics and metallogenic conditions of Yinshan Tsui lead zinc deposit,Ningyuan,Hunan

湖南宁远银山咀铅锌矿区位于南岭成矿构造带中段,属于沉积改造型铅锌矿床。区内构造复杂,褶皱以银山咀向斜为主体;断裂构造主要以NNE、NNW为主,规模较大,次级的NE向断裂为后期构造,切割前期断裂。同时,次级的NW、近SN向断裂和层间硅化破碎带亦较发育,是区内岩脉、矿化体的主要赋存部位,矿体多呈脉状、层状、似层状产出。通过分析得知构造作用对矿体的空间分布,形态,产状以及矿化的发生与形式都起到重要的控制作用。

Yinshanzui Pb-Zn deposit in Ningyuan,Hunan Province,is located in the middle of Nanling metallogenic tectonic belt and belongs to sedimentary reformed Pb-Zn deposit.The structure in the area is complex,and the fold is mainly Yinshanzui syncline;the fault structure is mainly NNE and NNW,and the scale is large,the secondary NE-trending fault is late structure,and the early cutting fault.At the same time,the secondary NW,near SN-trending faults and interlayer silicified fracture zones are also well developed,which are the main occurrence sites of dikes and mineralized bodies in the area.Most of the ore bodies occur in the form of veins,layers and layers.The analysis shows that tectonism plays an important role in controlling the spatial distribution,shape,occurrence,occurrence and form of mineralization of ore bodies.