云南永胜县宝坪铜矿地质特征及找矿标志

THE GEOLOGICAL FEATURE AND PROSPECTING CRITERIA OF BAOPING CU DEPOSIT IN YONGSHENG,YUNNAN

云南永胜宝坪铜矿矿体呈似层状、扁豆状,赋存于上二叠统黑泥哨组岩层中,矿床的形成与该区域晚二叠世第4次玄武岩浆喷发旋回有关;矿体明显受地层、构造和岩相古地理环境控制,具有显著火山—沉积型矿床特征。区内上二叠统黑泥哨组、断裂构造隆起带、围岩蚀变、化探元素组合异常和前人遗留的老硐、旧坑、采矿遗址等为重要找矿标志。

The orebody of Baoping Cu deposit in Yongsheng,Yunnan is stratoid,lenticular in Upper P Heinishao Formation rock bed.The genesis of ore deposit is inrelation to the 4 th basalt eruption cycle of Late P in this area.The orebody is controlled clear by the strata,structure and lithofacies palaeogeographic environment,with the evident feature of volcanic-sedimentary ore deposit.The Upper P Heinishao Formation in this area,rise zone of fault,alteration of wall rock,geochemical anomaly of element assemblage,old pit,mining relict are the important prospecting criteria.