论文部分内容阅读
运用板块构造理论，对鄂尔多斯盆地西缘和南缘的地质背景和构造变形特征进行分析，认为鄂尔多斯盆地中央古隆起在早古生代由祁连海槽与鄂尔多斯盆地碰撞拼贴产生的近东西方向的侧向挤压应力作用而形成。盆地西缘近南北向的青铜峡－固原断裂是碰撞拼贴带，断裂带与中央古隆起延伸方向平行，同时，秦岭海槽由南向北推挤以及渭北构造带北界的近东西走向的草碧－老龙山－圣人桥断裂的左行走滑使中央古隆起的南端向东转折，导致中央古隆起在平面上呈现“Ｌ”形展布。
Based on the tectonic theory of plate tectonics, the geological background and tectonic deformation characteristics of the western and southern Ordos Basin are analyzed. It is concluded that the central paleohighlift in the Ordos Basin was laterally crushed in the near east-west direction caused by collision and collage between the Qilian Trough and Ordos Basin in the Early Paleozoic Compressive stress and the formation of. The Qinghai-Gully-Guyuan fault near the north-south margin of the basin is a collision collage zone, which is parallel to the extending direction of the central paleohigh. At the same time, the Qinling trough pushed from south to north and near east-west of the northern boundary of the Weibei tectonic belt The left bank of the Caolbi-Laolongshan-Saints Bridge fractured eastwards to the south of the central paleohigh, resulting in a “L” -shaped distribution of the central paleohigh in the plane.