青海省干热各沟地区铜金多金属矿找矿地质条件及成矿远景

本文研究区大地构造位置位于东昆仑南缝合带北侧,布喀达坂峰-阿尼玛卿山华力西期铜、钴、金(锑)、煤、蛇纹岩Ⅲ级成矿带上,属秦祁昆地层区的东昆仑南坡分区。研究区出露的地层总体北部广布第四系,南西部分布古近系古新统—始新统沱沱河组地层,中西部以二叠系上统布青山群马尔争组为主;受昆南深大断裂的影响,区域内褶皱构造和断裂构造发育,构造以北西西向断裂为主;岩浆岩主要为华力西期晚期基性-超基性、中酸性侵入岩多分布于研究区中东部,多呈岩株、岩基、岩脉状产出。研究区内圈定MCu1—MCu6六条铜矿化带,MAu1、MAu2两条金矿化带,其中MCu2、MCu3铜矿化带和MAu1、MAu2金矿化带规模及品位较好。通过对已有地质信息与典型矿床对比分析成矿条件,确定找矿类型、找矿方向和找矿远景。

Geological Conditions and Metallogenic Potential of Copper-Gold Deposits in Ditches of Hot and Dry Regions in Qinghai

he study area is located in the north of tectonic suture zone of East Kunlun and in the metallogenic belt of copper, cobalt, gold （antimony）, coal, ore gradeⅢin Buka Daban Peak-A＇nyemaqen Variscan mountain which belongs to the southern slope of East Kunlun Mountain of Qinling-qilian-kunlun stratigraphic area. The north of the exposed formation in the study area wildly distributes in quaternary system. E1-2t is located in the south west part and p2m in the middle west part. Influenced by the deep facture in the south of the Kunlun Moun-tain, it is mainly the fold structure and the fracture development in this region and is north-west structure. Magmat-ic rock is mainly distributed in the late variscan basic-ultrabasic. Acidic intrusive rocks are mainly distributed in the middle-east part of the study area. It mainly presents as stock, bathylith and dyke. Six MCu1-MCu6 copper mineralization belts and two gold mineralization belts are settled in the study area. And, the scope and grade of MCu2, MCu3 copper mineralization belts are better. This paper analyzes the minerogenetic conditions based on the contrast between the previous geological information and typical ore deposit, and discovers ore types, ore di-rections and ore prospects.