为解决鄂尔多斯盆地华庆地区延长组长6段的物源问题,引入聚类分析方法.通过研究长6段砂岩的稀土元素特征和聚类分析,确定了该区的物源方向.稀土元素特征表明:配分曲线与上地壳稀土元素的分布形态几乎完全一致,与下地壳和洋壳的特征相差甚远,说明其陆源碎屑物质应来源于上地壳.聚类分析结果认为该区主要物源有北东方向,北东东方向和正北方向三个物源,与鄂尔多斯盆地古地理背景一致. In order to solve the source of Yanchang Formation Member 6 in Huaqing area, Ordos Basin, a cluster analysis method was introduced to study the provenance direction of the sandstone in Chang 6, The results show that the distribution curve is nearly identical with that of the upper crust, which is far from the characteristics of the lower crust and the oceanic crust, indicating that the terrigenous crustal material should originate from the upper crust. North East, North East and North of the three provenance, consistent with the Ordos Basin paleogeography background.