云南白乐寨铜矿床地质特征及找矿前景

Geological Characteristics and Prospecting Potential of Bailezhai Copper Deposit in Yunnan Province

白乐寨铜矿区区域构造位置处于扬子准地台西南缘丽江台缘褶皱带之点苍山-哀牢山褶皱束的东南端,属扬子准地台西南缘边缘的一个逆冲~推覆构造带。矿区断裂十分发育,以北北西向、北西西向为主,次为北西向、北东向,有多条区域性断裂穿越矿区。矿床为受断裂构造控制的热液充填交代脉型矿床,产于三叠系中上统蚀变灰岩及泥质粉砂质板岩中沿断裂展布的构造角砾岩或蚀变岩里。本文通过对矿区地质特征、找矿标志的总结分析,认为该区具有很好的找矿前景。

Bailezhai copper mining area regional tectonic position is located in SW of Diancangshan-Ailaos- han platform bunch which is situated in Lijiang platform margin fold belt of the south margin of Yangtze paraplatform , it belongs to a thrust and nappe belt along the SW mergin of Yangtze paraplatform, fracture of the area is very develop, direction is mainly for NNW and NWW, secondary for NW and NE, there are multiple regional fracture through the mining area. Ore deposit is controlled by the fracture structure of hydrothermal filling metasomatic vein type deposit, which are found in medium--upper Triassic system al- tered argillaceous limestone and silty slate along the fracture distribution in tectonic breccia or alteration in the rock. Through analyzing the mining area geological characteristics and prospecting marks, it is thought that the area has good ore prospects.