新疆乌恰县吾合沙鲁地区水系沉积物地球化学特征与找矿远景

新疆乌恰县吾合沙鲁地区位于塔里木盆地西缘,该区及周边已发现金属矿床(点)20余处,具有良好的铜、铅、锌矿找矿前景。通过1∶5万水系沉积物的地球化学测量,对吾合沙鲁地区Cu、Pb、Zn、Ag等15种元素的地球化学特征进行了初步分析,综合元素分异程度、富集程度、叠加强度,发现Cu、Pb、Zn、Ag、Sb、Sn、Sr、W在研究区内有富集成矿的可能,是研究区主要成矿元素。根据异常特征与成矿地质条件,共圈出15处地球化学综合异常,优选出3处找矿远景区,即吾合沙鲁铜、银、铅、锶多金属找矿远景区、硝尔布拉克套铜多金属找矿远景区和阿克套铜、锶多金属找矿远景区,为下一步找矿工作指明了方向。

Geochemical Characteristics of Stream Sediments and Prospecting Direction in the Wuheshalu Area,Wuqia County,Xinjiang

The Wuheshalu area is located in the west margin of Tarim basin, Wuqia County, Xinjiang. More than 20 metal deposits (mineralized spots) have been found in Wuheshalu and the surrounding area, which have a good prospecting direction for copper, lead and zinc. Through 1∶50,000 geochemical survey of stream sediments in the Wuheshalu area, we have analyzed the geochemical characteristics of 15 elements such as Cu, Pb, Zn, Ag. Based on the differentiation, enrichment and superposition degree, we conclude that there is good potential for the concentration and mineralization of elements of Cu, Pb, Zn, Ag, Sb, Sn, Sr, and W,and these elements are the main ore-forming elements in the study area. According to the anomaly characteristics and metallogenic geological conditions, fifteen geochemical complex anomalies, in addition to three prospective areas are delineated, namely the Wuheshalu Cu-Sr-Pb-Ag polymetallic ore prospective area, the Xiaoerbulake-tao Cu polymetallic ore prospective area and the Aketao Cu-Sr polymetallic ore prospective area,respectively.This paper points out the direction for the prospecting work in the next stage.