青海龙哇俄当地区土壤地球化学测量找矿研究

Study on soil geochemistry measurement and ore-prospecting in Longwaedang Region

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1 570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 relatively 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 assemblage characteristics and concentration of each element,and delineates 3 priority prospecting targets besides offering suggestions about future prospecting.