鄂尔多斯盆地东缘柳林—子洲地区本溪组富有机质泥页岩发育影响因素与发育模式.

The marine-continent transitional mud shale in Upper Carboniferous Benxi Formation is a potential shale gas exploration target in the eastern Ordos Basin. Based on the systematic observation and sampling analysis of representative profiles and key well, the influencing factors and development pattern of organic-rich mud shale in Benxi Formation of Liulin-Zizhou area, the eastern Ordos Basin were studied, and the development pattern “slow subsidence, terrigenous organic matter supply, and enclosed preservation” of marine-continent transitional organic-rich mud shale was established. The results show that the organic-rich mud shale in Benxi Formation of Liulin-Zizhou area, the eastern Ordos Basin mainly belongs to Jinci and Pangou members, and the lithofacies is mainly clay mud shale with a small amount of siliceous mud shale; the abundance of organic matter is high, and the type is mainly humic; the coal-forming plants flourish in the region because of the hot and humid climate in Benxi depositional period, and result in an abundant supply of organic matter for the sedimentary water; the transgression occurs in the eastern Ordos Basin under the tectonic background of slow subsidence; the high salinity of anoxic water at the bottom maintains reduction environment in the barrier island-lagoon-neritic muddy shelf sedimentary system, which provides a favorable zone for the preservation and enrichment of sedimentary organic matter. [ABSTRACT FROM AUTHOR]