The Mesozoic to Cenozoic intraplate deformation of the North China Craton (NCC) is an intriguing phenomenon that led to different evolutions of the Ordos Basin and the eastern part of the NCC. Located in the central part of the NCC, the Lüliangshan is regarded as a boundary between the Ordos Basin and the eastern NCC, but the exact location of this boundary is still debated. Our field investigations suggest that the Lüliangshan anticline is a classical Mesozoic basement-involved anticline. The Lishi fault on the west of the southern part of the Lüliangshan anticline is argued to be a large fault and the east boundary of the Ordos Basin. However, our investigations show that it is not a continuous single fault but a deformation zone composed of several segments without connection along the strike. In front of the western Lüliangshan, this tectonic zone is a top-to-the-west breakthrough thrust placing the western Lüliangshan basement-involved anticline in the hanging wall with limited displacement. Field investigations show that the traditional view of the northern segment of the Lishi fault as a boundary between blocks is not clear. With a similar deformation style, the southern Lishi fault passes Lishi City, extends northeastward, connects to the Ximafang fault, and then extends to link with the Kouquan fault as the west boundary of the Datong Basin. All these faults show a map pattern of relay array. The eastern margin of the Ordos Basin was deformed by a series of thrusts that controlled the basement-involved folds. The Lüliangshan anticline and its boundary faults were formed in the Late Jurassic, and the driving force of the intraplate deformation is inferred to the westward low-angle subduction of the Paleo-Pacific plate from the east.

中文翻译：

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中生代鄂尔多斯盆地东界性质与吕梁山背斜的形成

华北克拉通（NCC）的中新生代板内变形是一个有趣的现象，导致鄂尔多斯盆地和华北克拉通东部发生不同的演化。吕梁山位于华北盆地中部，被认为是鄂尔多斯盆地与华北盆地东部的分界线，但该界线的确切位置仍有争议。野外调查表明，吕梁山背斜是典型的中生代基底卷入背斜。吕梁山背斜南部以西的离石断裂被认为是鄂尔多斯盆地东部边界的大型断裂。然而，我们的调查表明，它不是一个连续的单一断层，而是一个由沿走向没有连接的几个片段组成的变形带。西吕梁山前，该构造带是一个自上而西的突破冲断，将西吕梁山基底卷入的背斜置于上盘中，位移有限。野外调查表明，传统的将离石断裂北段作为地块边界的观点并不明确。类似的变形方式，南离石断裂经过离石市，向东北延伸，与西马房断裂相连，再延伸与口泉断裂相连，作为大同盆地的西边界。所有这些故障都显示了继电器阵列的映射模式。鄂尔多斯盆地东缘被一系列控制基底卷曲的逆冲带变形。吕梁山背斜及其边界断裂形成于晚侏罗世，