云南景谷县大独田铜矿地质特征与成因

THE GEOLOGICAL FEATURE AND GENESIS OF DADUTIAN CU DEPOSIT IN JINGGU,YUNNAN

云南省景谷县大独田铜矿多为隐伏矿体,矿体呈似层状、透镜状赋存于上三叠统小定西组第二段上亚段(T_(3)X^(2-2))岩层中,矿体产状与岩层产状一致;含矿岩性为石英砾岩、岩屑砂岩、复成分砾岩、致密块状玄武岩、火山角砾岩等。成矿物质来源于自地壳深部的含矿热液,矿床成因类型为中-低温火山热液-叠加改造型铜矿床。

The orebodies of Dadutian Cu deposit in Puer,Yunnan are mostly buried,which are stratoid,lenticular in Upper Triassic Xiaodingxi Formation Member 2 Upper Sub-Member(T3x22).The orebody occurrence is consistent with that of the rock bed.The ore-bearing rocks are the quartz conglomerate,debris sandstone,composite conglomerate,dense massive basalt,volcanic breccia,etc.The metalloenesis material is derived from the deep ore-bearing hydrothermal fluid.It is a middle-low T hydrothermal-superimposition reformation Cu deposit in genesis.