1∶5万地球化学测量在青海沱沱河郭仓乐玛地区找矿中的应用

Application of 1∶50000 geochemical survey in ore prospecting in Guocanglema area of Tuotuo River,Qinghai Province

沱沱河郭仓乐玛地区位于青海省西南部唐古拉山北坡,三江多金属成矿带北西段。依据1∶5万地球化学测量资料,结合地质特征,对郭仓乐玛地区9种成矿指示元素的分布、相关性、组合异常等特征进行了分析研究,圈出14处综合异常,通过对异常初步查证,圈出2条大型锌矿化蚀变带,3条锌矿化体,锌资源量为15.07万t,平均品位3.28%;铜资源量0.375万t,平均品位2.19%。说明1∶5万地球化学测量可以在该区发挥很好的找矿指导作用,确定了Zn、Ba、Cd、Cu、Sb、Mo、As、Ag、Au等具有明显找矿指示意义的元素异常分布模式,指出下步找矿方向。

The Guocanglema area of Tuotuo River is located in the north slope of tanggula mountain in the southwest of qinghai province,in the north-west section of the Sanjiang polymetallic metallogenic belt.Based on the 1∶50,000 geochemical survey,and combining the geological features,The distribution,correlation and assemblage anomalies of nine metallogenic indicator elements in guocanglema area were analyzed and studied.Fourteen geochemical anomalies were identified,Through the preliminary verification of the anomaly,Two large mineralized alteration belts and three zinc mineralized bodies are circled,This indicates that the geochemical survey of 1: 50,000 can play a good guiding role in ore-prospecting in this area.and determined the distribution patterns of elementanomalies such as Zn、Ba、Cd、Cu、Sb、Mo、As、Ag、Au,which have obvious prospecting indication significance.The next prospecting direction is pointed out.