Mesozoic Tectonic Evolution in North Section of the Western Margin of Ordos basin

For a long time,many scholars have made a lot of studies on the structural characteristics,attributes,evolution,and formation mechanism of the north part of the western Ordos basin because of its special tectonic location and complex structural features,they are different viewpoints.In this paper,based on the study on the northern zone geometry,with the subsidence history and rock type analysis,kinematics of the northern zone has been interpreted.It is concluded that the thrusting activity of Western structural belt and subsidence of the basin were closely related to the terranes accretion of Qinghai—Xizang(Tibetan)Plateau and the subduction of Izanagi plate.The NS-striking thrust—nappe belt along the western Ordos basin was come into being in Late Triassic—Cretaceous,accordingly,intracontinental foreland basin was developed in western basin and Multiple syntectonic coarse fragment were deposited.