Oil & Gas Geology ›› 2006, Vol. 27 ›› Issue (2): 244-252.doi: 10.11743/ogg20060216

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Types of original sedimentary basins and tectonic evolution on southeastern margin of North China plate

Yu Hezhong1, Han Shouhua1, Xie Jinlong2, Guo Qingxin1, Wu Jinyun1   

  1. 1. Hangzhou Institute of Geology, PetroChina, Hangzhou, Zhejiang, 310023;
    2. School of Energy Resources, China University of Geosciences, Bejing, 100083
  • Received:2006-03-01 Online:2006-04-25 Published:2012-01-16

Abstract:

The types of original sedimentary basins on southeastern margin of North China plate were controlled by tectonic evolution. North China and Yangtze plates experienced the changes from"divergence"to"convergence"in Paleozoic-Middle Triassic. The southeastern margin of North China plate correspondingly experienced the changes from passive continental margin in Sinian-Middle Ordovician(Z-O2)to uplifting and denudation in Late Ordovician to Early Carboniferous (O3-C1). During late Early Carboniferous-Middle Triassic (C2-P2), foreland flysch depositional basins were formed on the continental margin due to convergence of plates. During Late Triassic ?Early Jurassic, Qinling-Dabie orogenic zone was formed through the collision of the two plates, coupled with the formation of molasses sedimentary basins. During Middle Jurassic-Early Cretaceous, the margin of the orogenic belt detached while the epiorogenic subsidence occurred within the orogenic belt, resulting in a complicated structural pattern with outstretching on the trailing edge and thrusting on the leading dege. Outstretched fault-depression and down-warped basins were formed later under the control of the activities of Palaeo-Pacific plate and Pacific plate.

Key words: foreland flysch sedimentary basin, foreland molasses sedimentary basin, detached structure, type of original basin, North China plate

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