西藏色热勒地区水系沉积物测量地球化学特征及其找矿意义

Geochemical characteristics and prospecting significance of stream sediment survey in serele area,Tibet

西藏色热勒地区位于冈底斯-喜马拉雅山造山系北缘的拉达克-冈底斯-察隅弧盆系与班公湖-双湖-怒江-昌宁对接带西段的班公湖-怒江结合带的结合部位,属羌塘高原大湖盆区,在区域地质上具有重要的成矿潜力。通过1:5万水系沉积物测量圈定单元素异常发现色热勒地区的Hg、As、Sb、Mo等元素的异常值较高,异常区域较大。通过水系沉积物测量缩小了找矿范围,由野外验证和岩石地球化学剖面分析发现单元素异常与其套合性较好,为找矿工作提供了更简单确切的找矿信息。

The Serele Region of Tibet is located at the junction of the Ladakh Gangdise Chayu arc basin system on the northern margin of the Gangdise Himalayan orogenic system and the Bangong Nujiang Nujiang junction zone in the western part of the Bangong Lake Shuanghu Nujiang Changning junction zone.It belong to the great lake basin area of Qiangtang plateau and has important mineralization potential in the regional geology.Based on 1:50000 stream sediment survey,it is found that Hg,As,Sb,Mo and other elements have higher abnormal values and larger anomaly areas.Through the measurement of stream sediment,the prospecting scope is narrowed.Through field verification and rock geochemical profile analysis,it is found that the single element anomaly is well matched with it,which provides more simple and accurate prospecting information for ore prospecting.