青海包尔浩日地区金多金属矿成矿潜力分析

Analysis on the metallogenic potential of gold polymetallic deposits in Baoerhaori of Qinghai

为了对青海包尔浩日地区金多金属矿成矿潜力进行评价,本文以地球化学特征为研究内容,在野外地质工作的基础上,结合同一成矿带不同矿床构造蚀变带、剥蚀程度的变化特征,分析了该地区金多金属矿的成矿潜力。结果表明:研究区北西向构造蚀变带深部赋存韧—脆性变形、韧性变形控制的糜棱岩型金、银矿的前景较好,铅锌矿成矿前景一般,与土壤综合异常相吻合的SbⅡ、SbⅢ、SbⅣ构造蚀变带是重点找矿地段。研究结果可为今后在该地区地质找矿提供一定的理论基础。

Geochemical characteristics are studied in this paper to evaluate the metallogenic potential of gold polymetallic deposits in Baoerhaori of Qinghai.On the basis of field geological work,the metallogenic potential of gold polymetallic deposits in the area is discussed combining the variation characteristics of structural alteration zone and denudation degree of different deposits in the same metallogenic belt.The results show that the deep part of NW-trending structural alteration zone in the area has a good prospect of mylonite-type gold and silver deposits controlled by ductile deformation.The metallogenic prospect of lead-zinc deposits is general.The key prospecting area is the structural alteration zones of SbII,SbIII and SbⅣwhich are consistent with the comprehensive soil anomalies.The results can provide a theoretical basis for geological prospecting in the area.