Abstract:

Through the analysis of the inversion structures in each secondary tectonic unit of the East China Sea Shelf Basin, we considered that the Cenozoic inversion structures were mainly as anticline，associated with thrust fault. There were four main tectonic inversions: Oujiang movement(T80)，Yuquan movement(T30)，Huagang movement(T20) and Longjing movement(T12); while such tectonic inversions had significant differences in time and space. In time evolution scale，the tectonic inversions were relatively weakened from Oujiang movement(T80) to Huagang movement(T20) in the West Depression Belt，and on the other hand they were relatively enhanced from Yuquan movement(T30)，Huagang movement(T20) to Longjing movement(T12) in the East Depression Belt. In space evolution scale，The Longjing movement(T12) in Xihu Sag and Diaobei Sag of the East Depression Belt had weakened trend significantly from north to south. The intensity distribution and migration evolution of Cenozoic tectonic inversions were the local response in the East China Sea Shelf Basin affected by the subduction rate and direction of plates interactions between Indian Plate with Eurasian Plate and Pacific Plate with Eurasian Plate.

Key words: inversion structure, distribution characteristics, migration law, genetic mechanism, the East China Sea Shelf Basin