郯庐断裂系研究的新进展——兼论东亚北东向走滑断裂系统

对郯庐断裂系研究的最新进展作了介绍。郯庐断裂是多期活动，性质多次转换的巨型断裂，最初的启动时间在晚三叠世末，与南北大陆的碰撞有着直接的关系，早期以走滑（左行）运动为主，伴随挤压和拉伸，范围限于华北地块内部，断裂纵向伸展的高峰期为白垩纪到早始新世，这一时期也是裂陷作用最强的时期，始新世以来以挤压作用为主，东亚走滑断裂系各组成断裂性质复杂，不能以中生代左行平移运动简单概括，走滑断裂系的发展和演化与同时

ADVANCES IN STUDIES OF TAN-LU FAULT ZONE AND STRIKE-SLIP FAULT SYSTEM IN NORTHEAST ASIA

Tan-Lu fault zone is a large scale fault zone characterized by polystage movement. It is started during collision between North China Block (NCB) and South China Block (SCB) in late Upper Triassic. The early stage (J₃-K₁) of movement known as left-lateral strike-slip which is associated with compression (early) and extension (late) is limited in inner NCB. The northern extension of the fault along its strike is taken place during Cretaceous and early Eocene, which is also a peak period of depression. After Eocene, the fault zone is mainly in compressional regime with slight right-lateral strike-slip movement.
Those faults consisting of northeast Asia strike-slip fault system are very complicated and can not be sumarised by a simple model of Mesozoic left-lateral trench fault system, although strike-slip movement dominate their history of evolution. The development and evolution of the strike-slip fault system is closely related to its geodynamic background, i.e. collision between NCB and SCB as well as subduction of Farallon plate, Izanagi plate and Pacific plate under east Asia continent.Late Cenozoic tectonic events seriously deformed or displaced the preexisting Mesozoic structures which must be considered during reconstruction of Mesozoic geology.