中国大陆东部晚中生代裂陷作用的表现形式及其幕式扩展

晚中生代期间，岩石圈的深部过程和构造应力场由左旋压扭（Ｊ２－Ｊ３）到右旋张扭（Ｊ３－Ｋ１）的反转变格导致了中国大陆东部大规模的裂陷作用，表现为广泛的火山岩喷发、花岗岩浆侵位、大规模ＮＮＥ向含油气断陷盆地系和变质核杂岩的发育。根据地质和地球物理资料探讨了这期裂陷作用的运动学体制。利用计算机模拟研究了裂陷盆地的充填演化过程，结果表明边界同沉积断层沉降速率的变化是盆地发育演化的重要特征之一，并由此导致了断陷盆地的幕式扩展

FEATURES OF LATE MESOZOIC RIFTING IN EAST CHINA AND ITS EPISODIC EXTENSION

During Late Mesozoic times, deep process and the reversion of tectonic stress field from sinistral compresso shear to dextral tenso shear of lithosphere caused the large scale rifting in East China, displaying in the widespread volcanic eruption, intrusion of granite and formation of large scale fault basin system with hydrocarbon and metamorphic core complexes. According to geological and geophysical data, kinematic system of this rifting is discussed. A computer modelling software has been programmed to investigate the processes controlling the basin fillings and evolution. The study result shows that the varied subsident rate of the marginal syndepositional faults is one of the major factors, which resulted in the episodic extension.