以五道梁地区1∶20万水系沉积物测量更新数据为基础,以渐新统雅西错组为研究对象,利用地层汇水域水系沉积物测量元素原始数据进行了参数统计,通过相对丰度、R型聚类分析和因子分析,分析了地层中各元素的含量分布特征及元素间的亲疏关系,进一步浅析了地层在成矿中的作用.认为雅西错组高钙碳酸盐岩建造环境显著,Ba、Sr、Ag、As、Cd、Mo在地层中有不同程度的富集.地层有一定的含矿性,其中Ag趋向于与黏土岩伴随的硅质砂岩类中,其他在碳酸盐岩中.在后期岩浆热源作用下,主要成矿元素能进一步富集成异常或成矿.%This article discusse Oligocene Yaxi lake Formation based on the up data of Wudaoliang area 1: 200000 stream sediment surveys. We have got the parametric statistics from original data of elements of stream sediment surveys. Through relative abundance, R type cluster analysis and factor analysis, it ana-lyses the content distribution characteristics of each element and the relationship among elements in strata, it gave a further explanation in strata metallogenesis. It was considered that Yaxi lake Formation had a significant high calcium carbonate rock built environment, and Ba, Sr, Ag, As, Cd, Mo had different degrees of enrichment.Strata have ore-bearing property, among them Ag distributes in silicon sandstone, others in carbonate rock. Under the effect of magma heat source, the main ore-forming elements could en-rich further to unusual or formed ore.
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