Based on analysis of heavy minerals,paleocurrent and clastic particles grading,the sediment of Yanchang section in Ordos Basin comes from two types of parent rock.

• 根据重矿物组合、古流向和碎屑颗粒粒度等资料,对鄂尔多斯盆地上三叠统延长组物源区的母岩性质、物源方向及演变特征等进行了分析。