为了快速缩小找矿范围，提供有利靶区，根据1∶5万水系沉积物测量化探异常( Hs-27)区，在青海龙哇俄当地区开展了1∶1万土壤地球化学测量工作，通过对1570件有效土壤样品进行Au、Ag、Pb、Zn、Cu、As、Sb、Bi等元素分析测试，结果表明：Pb、Zn和As元素的浓集系数和变异系数较大，易形成地球化学异常，共圈定出12处异常集中区。运用聚类分析和因子分析等方法，在分析各元素组合特征、浓度情况的基础上，对异常进行了筛选评价，圈定和优选了3处找矿靶区，并对下一步找矿工作提出了建议。
In order to quickly narrow down the prospecting scope to a favorable target,1∶10 000 soil geochemical measurement is carried out in Longwaedang region of Qinghai province based on the 1∶50 000 stream sediment survey geochemical anomaly (Hs-27) area. Analysis on elements including Au,Ag,Pb,Zn,Cu,As,Sb,Bi,etc. is conducted in 1 570 effective soil samples. The results show the concentration and variation coefficients of Pb,Zn and As are rela-tively big,so they are easy to form a geochemical anomaly. A total of 12 anomaly clusters are delineated. The paper classifies and evaluates the anomalies using clustering analysis and factor analysis based on the analysis of the assem-blage characteristics and concentration of each element,and delineates 3 priority prospecting targets besides offering suggestions about future prospecting.
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