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本文通过研究,主要得出以下结论:二叠系地层中以细粒砂岩为主,中粒砂岩次之,粗粒砂岩含量较少;本区二叠系煤系地层中的粉砂岩多富含泥质,以含泥粉砂岩或泥质粉砂岩为主,碎屑成分常见者为石英,岩屑(包括云母)含量次之;研究区二叠系含煤地层由陆源碎屑岩夹煤层组成,砂岩的成因类型主要为分流河道型和决口沉积型。
The main conclusions of this paper are as follows: the Permian strata are mainly composed of fine-grained sandstones, followed by medium-grained sandstones and coarse-grained sandstones; the siltstones in the Permian coal measures strata in this area are rich in The mudstone is dominated by muddy siltstone or argillaceous siltstone. The common component of the debris is quartz, and the cuttings (including mica) are the second most frequently. The Permian coal-bearing strata in the study area are composed of terrigenous clastic rock intercalated with coal The main types of sandstone are distributary channel type and breaching sedimentary type.