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利用研究区沙二段砂岩分区的类型,岩屑类型及含量变化,重矿物含量变化,分析埕北断阶区沙河街组二段的物源区。分析结果认为,沙河街组二段沉积时期,研究区物源主要来自南部埕宁隆起和北部燕山褶皱带,还有来自东北部的海中隆起。
Based on the type of sandstone, the type and content of cuttings and the change of heavy minerals in the second member of Shahejie Formation in the study area, the source area of the second member of Shahejie Formation in Tiebei fault zone is analyzed. The results show that during the sedimentary period of the second member of Shahejie Formation, the provenance of the study area comes mainly from the Suining uplift in the south and the Yanshan fold belt in the north, and uplift from the sea in the northeast.