Oil & Gas Geology ›› 2005, Vol. 26 ›› Issue (2): 197-201.doi: 10.11743/ogg20050210

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Meso-Cenozoic tectonic setting and evolution of East China Sea shelf basin

Zheng Qiugen1,2, Zhou Zuyi2, Cai Liguo1, Lu Yongde1, Cao Qinggu1   

  1. 1. Wuxi Branch of Exploration and Production Research Institute, SINOPEC, Wuxi, Jiangsu;
    2. College of Marine Geology & Earth Science, Tongji University, Shanghai
  • Received:2005-04-01 Online:2005-04-25 Published:2012-01-16

Abstract:

Based on distribution of Mesozoic in East China Sea and magmatic-tectonic events in the eastern Fujian and Zhejiang provinces, Kula-Pacific plate would have relatively strong subduction toward China's mainland during Jurassic-Early Cretaceous, thus East China Sea and the area to the south should be of fore-arc basin. During late Late Cretaceous-Eocene, volcanic island arc moved eastward and the East China Sea shelf basin was turned into a back-arc basin. The centers of fault subsidence were located in Changjiang and Oujiang sags in the western part of the shelf basin during Palaeocene, and they moved eastward during Eocene and consisted mainly of the Xihu sag in the eastern part of the shelf basin. East China Sea shelf basin was downwarped in Oligocene, due to the change of subduction direction of Pacific plate and the effect of Philippine Sea plate, and the center of depression was mainly located in the eastern part. Okinawa ocean trough and Ryukyu island arc were formed in late Miocene. During late Miocene (approx. 6 Ma), Luzon island arc collided with China's mainland in Taiwan area, resulting in the emergence of Taiwan Island, and the formation of the present features of Taixi(or West Taiwan) basin.

Key words: East China Sea shelf basin, Meso-Cenozoic, Pacific plate, Philippine Sea plate, tectonic evolution

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