根据岩心、薄片和测井资料,并结合古地貌分析,认为鄂尔多斯盆地东部发育多期岩溶,马四期前因盐刺穿构造作用,地层抬升,马三段地层被剥蚀,形成“后马三期”新的一期岩溶作用。岩溶塌陷发育受控于断裂和底劈作用,并沿断裂带分布。 According to the data of cores, thin slices and logs and the analysis of palaeogeomorphology, it is considered that multi-stage karstification developed in the eastern part of Ordos Basin. Due to the salt piercing tectonic action and stratigraphic uplift in Ma 4 period, the strata of Ma 3 sections were denuded to form “Houma Three ”a new period of karstification. The development of karst collapse is controlled by faults and dike and distributed along the fault zone.