羌塘盆地是青藏高原面积最大、勘探前景最好的盆地。盆地地表褶皱构造主要发育于侏罗系构造层中,呈带状展布,以东西向和北西西向直立水平褶皱为主,并构成类隔挡式组合样式。褶皱变形受挤压、走滑作用和基底构造多种构造机制制约,盆地南北缝合带造山作用控制了盆地褶皱形态、样式和空间分布规律,是褶皱变形的主要动力学因素。侏罗系构造层中大型背斜形成于侏罗纪末-早白垩世,与盆地主力烃源岩油气生成和运聚时空配置关系较好,为油气有利圈闭构造。
Qiangtang basin is the largest and most prospective petroliferous basin in Qianghai-Tibet plateau. Its surface fold buildings mostly occur in zonal distribution within the Jurassic structural layer, and are dominated by EW-NWW trending upright horizontal folds in pseudo-ejective assemblages. The deformation mechanisms of folds were controlled by compression, strike-slip, and basal structures. Nevertheless, the orogeny along the NS-trending suture zone was the dominant dynamics factors that controlled the geometry, styles and spatial distribution of the folds in the basin. The large folds in the Jurassic structural layer were formed during the Late Jurassic-Early Cretaceous and their temporal and spatial relationships with the generation, migration and accumulation of hydrocarbons from the major source rocks were favorable for hydrocarbon pooling. Therefore, they are favorable trap structures.