青海沙丘沟地区金矿床地质特征及找矿远景分析

青海省都兰县沙丘沟地区金矿出露地层主要为古元古界金水口岩群片岩组和片麻岩组,另外分布有少量的第四系。通过激电工作,在XV矿带、II矿带各圈定了2处激电异常带,在III矿带圈定了1处激电异常带;通过地质工作,基本查明了研究区内XV、II、III、IV 4条蚀变带及带内矿体的分布规律及其空间形态、厚度、品位的纵横向变化和矿石的类型、矿石的主要化学成分、金的赋存状态。研究表明,研究区内的金及多金属成矿受构造控制作用明显,矿体严格受控于XV、II、III、IV 4条蚀变带,矿体多呈透镜状、脉状产出。

Geological Characteristics and Prospecting Prospect of Gold Deposits in Shaqiou Area, Qinghai

The exposed strata of the gold deposits in the Shaqiou area of Dulan County, Qinghai Province mainly are schists and gneisses of Paleoproterozoic Jinshuikou Group, with a small distribution of Quaternary rocks. Two IP anomalies have been delineated in each of XV and II ore belt, and one IP anomaly has been identified in III ore belt. Through geological works, four alteration zones (XV, II, III and IV) have been basically identified in the study area. In addition, the distribution law, spatial shape and thickness of ore bodies in the alteration belts, the type and main chemical composition of the ore, the longitudinal and lateral changes of gold grade and the occurrence of gold also have been found out. The research shows that the gold and polymetallic mineralization in the study area is obviously controlled by structure, the ore body is strictly controlled by XV, II, III and IV4 alteration zones, and the ore bodies mostly are lenticular and vein-like.