土壤地球化学测量在新疆西准吉尔吾沙克金矿勘查工作中的应用

Application of Soil Geochemical Survey in Exploration of the Gill Vishak Gold Deposit,Western Junggar,Xinjiang

新疆在1∶20万比例尺的区域化探扫面中发现大量Au异常,据此找到多处大中型金矿床。为了对托里县幅1∶20万水系沉积物测量所圈定的"39乙"号异常区进行检查,开展了1∶1万土壤地球化学测量。通过合理确定研究区土壤中Au元素背景值与异常下限,直接用异常下限值圈定异常,利用岩石地球化学剖面测量进一步验证土壤异常。最终确定了土壤地球化学测量在该区找矿工作中的适用性和可靠性,圈定了2个Au异常带(4个异常区),并划定I号异常带为研究区首要找矿靶区。

Several large or medium gold deposits had been discovered on the basis of numbers of Au anomaly were found in the 1：200,000 scale geochemical prospecting of the Xinjiang regional. In order to examine the anomaly re- gion （39# B） delineated in Tori 1： 200,000 scale regional stream sediment survey, a 1 ： 10,000 scale soil geochemi- cal survey was developed in this area. According to reasonably determining the Au soil background value and threshold, the soil anomaly was further verified by using the anomaly threshold to delineate the anomaly directly and the rock geochemical profile measurement. Finally, the practicality and reliability of the soil geological survey in the prospecting work were determined; two Au anomaly belts （four anomaly sites） were delineated; and the I a nomaly belt was delineated as the primary prospecting target.