西藏尕尔穷铜金矿元素空间分布规律及地球化学勘查模型

尕尔穷铜金矿床是班公湖-怒江成矿带西段唯一达到详查级别的矿床,其金资源量已达大型规模.根据30个钻孔的成矿元素化学分析结果,对各成矿元素平面分布特征进行了系统分析发现,尕尔穷矿床具有较明显的与岩浆热液成矿作用有关的元素分带特征,矿体从南东→北西向、深部→浅部具有Mo→Cu(Au)→Cu+Au+Ag→Au+Cu+Ag→A...

Element Spatial Distribution of the Gaerqiong Copper-gold Deposit in Tibet and Its Geochemical Exploration Model

The Gaerqiong copper-gold deposit in the western section of the Bangong Co-Nujiang River metallogenic belt is the only deposit that has reached the level of detailed investigation,with its gold resource reaching the large size.According to the analytical results of elements in 30 drill holes,the authors made a systematic analysis of the plane distribution characteristics of ore-forming elements and found that the Gaerqiong deposit has obvious element zoning characteristics related to magmatic hydrothermal metallogenesis.The ore body from southeast to northwest and from the depth to the shallow part has the zoning feature of Mo→Cu(Au)→Cu+ Au+Ag→Au+Cu+Ag →Au+Ag.Through studying the mineralization in the lateral and vertical directions of the II—II’vertical profile and No.8 exploration line,the authors found that the ore body in the section and the plane has similar zoning characteristics.The geochemical exploration model indicates that from southeast to northwest there exists the anomaly zonality of Mo+Bi→Bi+Cu+Au+As→As+Au+Cu+Sb+Zn→Au(Cu)+ Zn→Au+Pb.Researches suggest that the hydrothermal center of the Gaerqiong deposit should be located in the 8—12 lines,the direction of fluid migration was from the southeast to the northwest,and the Gaerqiong copper-gold deposit is a typical porphyry-skarn deposit.