云南弥勒县宝园铜矿成矿条件分析

Analysis of Copper Mineralization Condition of Baoyuan Copper Mine in Mile County of Yunnan

弥勒县宝园铜矿区在大地构造上主要处于扬子准地台滇东台褶带,区域构造基本形态为地堑构造。区内矿床多以铜多金属矿为主,大部分发育于近地表喷发的玄武岩熔岩层序中,部分产在玄武质角砾岩中,玄武岩长期遭受风化淋滤,可次生富集,在岩溶盆地、溶蚀凹地及张性断裂等有利部位形成铁、铜矿。通过分析,认为该区成矿条件十分利于富集成矿。

The copper mine of Baoyuan in Mile County is mainly located in Yangzi platform,folding zone in eastern Yunnan. The basic shape of the regional structure is a graben structure. The deposits in this region are primarily copper polymetallic ore,most of which develop in basalt lava bed erupted in near-surface,part of which develop in basalt breccia. The basalt is affected by weathering and leaching for long time,iron and copper deposits could be formed by secondary enrichment at the favorable position such as karst basin,corrosion hollow and tensional fracture. It is showed by the analysis result combined with regional geochemical and physical anomalies that the mineralization conditions of this region are beneficial to enrichment mineralization.