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基于鄂尔多斯地块周边的GPS资料,我们发现地块南北边界的左旋错动速率比东西边界的右旋错动速率大2～3倍,而基于地质资料和几十年来的测量资料,大多数研究者强调鄂尔多斯地块东西边界的右旋错动和地块的逆时针旋转特征,针对上述矛盾,本文利用地块及其周边地区的地质和地形变测量资料(包括GPS和水准),分析了地块周边的地震活动随时间的变化,认识到鄂尔多斯地块的南北边界与东边界的构造活动存在交替性以及鄂尔多斯地区的构造运动以地块为单元的运动特点。鄂尔多斯地块与周边地块间的相对运动是通过它们之间边界带的变形和相对位移来实现的,近几年来,鄂尔多斯地块的南北边界带处于活动时期,但从长时期来看,鄂尔多斯地块相对阿拉善和阴山地块向东南运动,同时伴随着逆时针方向的旋转。
Based on the GPS data around the Ordos block, we find that the L-slip rate at the north-south boundary of the block is 2-3 times larger than the dextral dextral rate at the east-west boundary. Based on the geological data and decades of measured data, most studies Emphasizing the right-hand dislocation and the anti-clockwise rotation of the block on the east-west boundary of the Ordos block. According to the above contradictions, this paper analyzes the geological and topographical variables (including GPS and leveling data) of the block and its surrounding areas, The seismic activity around the block changes with time. It is recognized that the tectonic activities of the Ordos block have alternating tectonic activities between the northern and southern boundaries and the eastern boundary, and that the tectonic movement of the Ordos is characterized by the unit block. The relative movement between the Ordos block and the surrounding block is achieved through the deformation and relative displacement of the boundary strip between them. In recent years, the northern and southern border belt of the Ordos block has been active. However, in the long term, the Erdos The plot moves southeastwards relative to the Alashan and Yinshan plots, accompanied by anticlockwise rotation.