Journal of Jilin University(Earth Science Edition) ›› 2019, Vol. 49 ›› Issue (1): 139-153.doi: 10.13278/j.cnki.jjuese.20180177

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Mesozoic Evolution and Dynamics Transition in Southern Shelf Basin of the East China Sea

Yang Changqing1,2, Yang Chuansheng1,2, Sun Jing1,2, Yang Yanqiu1,2   

  1. 1. Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, Shandong, China;
    2. Laboratory for Marine Mineral Resources, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266071, Shandong, China
  • Received:2018-07-04 Published:2019-01-18
  • Supported by:
    Supported by National Natural Science Foundation of China (41476053) and China Geological Survey Project (DD20160153,DD20190211)

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Abstract: The East China Sea Shelf basin is located on the southeastern edge of the Eurasian plate. Its tectonic evolution and dynamic mechanism transformation are related to the collision between the Pacific plate and the Eurasian plate and the remote push effect of the Indian-Australian plate. Since Mesozoic, the basin formation and evolution process has been superimposed by multi-period subduction and multi-tectonic systems of the Paleo-Pacific plate. The geological structure and geophysical field are complex, and the basin evolution and dynamic process has been the debate focus. Based on the latest survey data, the authors mainly studied the Mesozoic basin evolution in the southern shelf basin of the East China Sea by means of regional tectonic-sedimentary setting analysis, structural physical simulation experiments and recovery technology of balanced geological profiles, and discussed the dynamics transition process of the southern shelf basin of the East China Sea. Our data suggests that the southern shelf basin of the East China Sea has experienced 1) pre-Late Triassic passive continental margins and Late Triassic-Middle Jurassic active continental margin squeeze-depression, the extrusive stress originated from the low-angle subduction of the Izanagi plate to the Eurasian plate; 2) the Late Early Cretaceous-Late Cretaceous active continental marginal faulted basin, whose stress originated from the lithospheric thinning and paleo-environment resulting from the subduction of the Paleo-Pacific plate into the Eurasian plate; and 3) the Paleogene back-arc extension faulted-depression. It is also suggested that the transition time from the EW-trending Paleo-Tethys tectonic system to the NE-trending Paleo-Pacific tectonic system in the East China Sea Shelf occurred in the end of Middle Triassic. The low-angle subduction and withdrawal subduction of the Paleo-Pacific plate represents the Mesozoic deep geological process in the East China Sea Shelf.

Key words: dynamics transition, basin evolution, Mesozoic, structural physical simulation experiment, East China Sea Shelf basin

CLC Number: 

  • P541
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