中国东部含油气盆地逆断层地震解释

Seismic interpretation of the reverse faults in east China oil-bearing basins

中国东部逆断层是中朝板块与西伯利亚板块在晚古生代时相对接、碰撞,加之中亚蒙古大洋向中朝板块俯冲,关闭形成的贺根山(西拉木伦)缝合带。二连地区的地震剖面显示,从阿拉坦合力白垩系对冲逆断层、到哈帮逆断层、塔北逆断层、准棚对冲断层、格日勒敖都对冲逆断层,其轴线可连成NEE方向。这进一步说明这些白垩系断层是贺根山(西拉木伦)缝合带晚期的延续。在中朝板块之上的华北盆地,其大地构造三期断坳结构演化的力学机制也是形成华北盆地不同时期断层的动力。

The reverse faults in east China lie on the Kegenshan(Xar Moron) suture zone formed by the joint and collision of Sino-Korea plate and Siberia plate in late Palaeozoic,as well as by underthrusting of Mongolia paleo-ocean from central Asia toward Sino-Korea plate.The seismic profile in Eren area shows that there appears an axial line of NEE trend from Cretaceous Alatanheli thrust fault to Habang reverse fault,Tabei reverse fault,Zhunpeng thrust fault and Gerileaodu thrust fault.This further demonstrates that these Cretaceous faults are the continuation of late Kegenshan(Xar Moron) suture zone.The dynamic mechanism of the three stages of fault depression evolution in North China Basin on Sino-Korea plate was also a force of faulting in different stages.