黄土粒度粗，不稳定重矿物含量高，表明西宁黄土区距黄土物源近。
The grain size of the loess is coarse with high contents of unstable minerals, indicating that the Xining loess material source approximate to the loess region.
平面上，研究区靠近米仓山和大巴山，结合岩屑、重矿物分析，显示物源来自北部大巴山褶皱带。
Meanwhile, analysis results shows that the material come from the north and northwest of the studied area.
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