云南省维西县山加铜矿地质特征及找矿标志

THE GEOLOGICAL FEATURE AND PROSPECTING CRITERIA OF SHANJIA CU DEPOSIT IN WEIXI,YUNNAN

云南维西县山加铜矿矿体呈脉状、层状、似层状、透镜状赋存于断层构造破碎带中,矿体近矿围岩为侏罗系中统花开左组(J_2h)和白垩系下统景星组第一段(K_1j^1),构造控矿明显,属构造破碎带控制的中-低温热液充填、交代富集型铜矿床。矿区内物化探异常、构造破碎带的围岩蚀变、以及前人遗留下的采坑、废矿硐、炼铜炉渣等是本矿区重要的找矿标志。

The orebody of Shanjia Cu deposit in Weixi,Yunnan is Veined,Bedded,stratoid,lenticular in the fault fracture zone.The wall rock near orebody is Middle Jurassic Huakaizuo Formation(J2h)and Lower Cretaceous Jingxing Formation Member 1(K1j^1),ore control of structure clear,belonging to the middle-low T hydrothermal filling,metasomatic concentration Cu deposit controlled by structure fracture zone.The important prospecting criteria in this orefield are the geophysical-geochemical anomaly,wall rock alteration of structure fracture zone and the remained precedent stope,waste shaft,slag,etc.