鄂尔多斯盆地中、新生代后期改造

鄂尔多斯盆地周缘和内部在中、新生代都受到后期改造作用，周缘存在挤压逆冲推覆和拉张断陷等不同性质的构造改造作用。在盆地内部，后期改造过程中发育在盖层中的断裂具有很强的规律性，受到了基底断裂的控制。盆地中部东西向断裂带对盆地的构造特征具有分区性，南北构造特征有别，北部地区北东、北西、近东西向断裂均有发育，正断裂、逆断裂和由断裂控制的挠曲构造等有规律发育，在不同方向基底断裂交汇部位的盖层内断裂最发育。南部则主要发育北东方向断层。

Late reformation of Ordos Basin in Mesozoic and Cenozoic

The margin and inside of the Ordos Basin are all reformed in Mesozoic and Cenozoic. Two different kinds of structure belt exist around the Ordos Basin. They are compressional thrust nappe belt and extensional faulted depression belt. Faults develop regularly in the sediment strata of inner basin during the stage of late reformation and are controlled by basement faults. EW trending basement fault in the middle of basin. The structural characteristics are different in the north area from those in the south,they are divided by the EW trending fault belt in the middle of basin. In the north area, NE, NW and EW trending faults are all developed and more developed in the joint of basement faults of NE, NW and EW derection. NE trending faults are mainly developed in the south area. The faults developed in sediment strata of basin are controlled by basement faults.