天宝山铅锌矿床成因探讨

Discussion on the genesis of Tianbaoshan Pb-Zn deposit

本文简述了矿区出露地层、构造特征、矿石结构构造。通过对比分析地下水热液矿床的特征,认为天宝山铅锌矿床属于地下水热液矿床。从成矿物质来源和成矿环境方面分析天宝山铅锌矿床成因,认为古封存卤水是热液的来源,F1断裂是导矿构造,F3断裂是容矿构造,地表渗透水的介入改变了热液性质,有利于成矿物质富集。指出找矿方向是在F3断裂两侧附近。

After introducing the exposed strata, structural features and ore structure in this mining area, the author thinks that the Tianbaoshan Pb-Zn deposit is a thermal groundwater deposit through the contrast analysis of characteristics of different deposits. Based on the analysis of metallogenic material source and mineralization environment of Tianbaoshan Pb-Zn deposit, the author makes a series of conclusions that the paleo-sealed brine is the source for ore forming hydrothermal solution, the FI fault is the main structure as passageway for ore fluids, the F3 fault is the main ore- bearing structure, infiltration water from the surface will change the property of ore fluids which is better for the enrichment of ore--elements. At last, the author points out that the both sides of F3 fault is the prospecting direction.