松辽裂陷盆地伸展构造演化与油气

EXTENSIONAL TECTONIC EVOLUTION AND PETROLEUM ACCUMULATION IN SONGLIAO RIFT BASIN.

松辽裂陷盆地指松辽地区晚侏罗世至早白垩世期间发育的盆地，因地壳伸展而产生。伸展构造以与中国大陆板块相邻的板块对中国大陆板块不均衡作用为背景，以动力变质和半地堑构造为特征，经历了前伸展裂陷、伸展裂陷和伸展裂陷定型３个演化阶段；裂陷盆地沉积了大量烃源岩，伸展运动中形成大量断块、潜山等圈闭，提供烃源岩演化的热动力，有较好的油气勘探前景。

The Songliao rift basin refers to the basin developed by crustal extension in Songliao region during Late Jurassic to Early Cretaceous period. The extensional structures are characterized by dynamometamorphism and half graben caused by the listric normal fault downdip, which had been resulted from the unbalanced action of the plates around China to China continent plate. The evolution involved three phases of the pre-extensional rifting, the extensional rifting and the extensional rift patterning. The extensional movement during Late Jurassic-Early Cretaceous has a close relationship with hydrocarbon:the sedimentation of a number of source rocks and the development of various traps.