青海省石灰沟地区水系沉积物测量地球化学特征及找矿预测

通过在青海省都兰县石灰沟地区开展的1∶50000水系沉积物测量工作,运用元素的变化系数、元素富集离散特征、叠加系数对石灰沟地区水系沉积物测量的10种微量元素进行地球化学统计分析,论述了10种微量元素的成矿潜力,得出Au、Cu、Pb、Zn这4种微量元素具有较大的成矿潜力,并通过相关分析、因子分析确立了测区内元素组合特征,共划分了3组成矿元素组合(Ag-Cu-Pb-Zn,Au-As-Sb,W-Bi-Hg)。通过衬值异常法圈定组合异常显示:研究区组合异常明显,异常套合较好。最后,根据组合衬值异常套合结果,在研究区优选了3处金铜铅锌多金属找矿靶区(A,B,C)。

Geochemical characteristics of stream sediments and ore prospecting prediction in Shihuigou area,Qinghai Province

This paper makes a geochemical statistical analysis of 10 kinds of trace elements measured in stream sediments in Shihuigou area, and discusses the metallogenic potential of 10 kinds of trace elements using the variation coefficient of elements, the discrete characteristics of element enrichment and the superposition coefficient based on the survey of 1:50 000 stream sediments in Shihuigou area, Dulan County, Qinghai Province.The paper concludes that four trace elements, Au, Cu, Pb, and Zn have great metallogenic potential, and establishes the characteristics of element assemblage in the survey area by correlation analysis and factor analysis. A total of 3 ore element assemblages (Ag-Cu-Pb-Zn, Au-As-Sb, W-Bi-Hg) are divided.Through the contrast value anomaly method to circle, the combination anomaly in the study area is obvious, and the anomaly combination is better. Finally, according to the abnormal nesting results of the combined contrast value, three gold, copper, lead and zinc polymetallic prospecting targets (A, B, C) are selected in the study area.