关键词: 中国东部, 中—新生代, 断裂系, 断裂构造迁移, 成因类型

Abstract: Deep and large faults developed very well in the central section of epicontinent of the East China. Based on the spacetime distribution of the faults, four fault systems are divided, namely, Yanshan orogenic belt fault system, QinlingDabieSulu orogenic belt fault system, Tanlu fault system and East China Sea shelf basinOkinawa trough fault system.The four fault systems have different migration regularities of the faults. The faults of Indosinian epochYanshan epoch of Yanshan orogenic belt have deflective migration regularity from EW direction to NE direction to NNE direction from the early to the late periods. The strength of thrustnappe of the QinlingDabie orogenic belt fault system shows a tendency of being strong in the south and in the east, weak in the north and in the west and of faulting in the east and folding in the west in Indosinianearly Yanshan epochs. Meanwhile,the faults have the feature of diachronous migration evolution from the east to the west from the early to the late periods. On the contrary, the last Yanshanian-early Himalayaian epochs show the tectonic feature of being strong in the north and in the west ,weak in the south and in the east. The activity and basincontrolling function of the Talu fault system are characterized by the migration from south to north from early to late periods. The formation time of the East China Sea shelf basinOkinawa trough fault system become apparently younger from west to east. The four fault systems and their structural migration are the products of different geodynamic backgrounds: collision of plates, intracontinental subduction, intracontinental orogency, strikeslip, plate subduction and retreat.

Key words: East China, MesoCenozoic, fault system, fault migration, genetic types