Oil & Gas Geology ›› 2006, Vol. 27 ›› Issue (1): 70-77.doi: 10.11743/ogg20060112

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Tectonic evolution and extensional pattern of rifted basin:a case study of Dongpu depression

Su Hui1,2, Qu Liping2, Zhang Jinchuan3, Wang Pingxia2, He Feng2, Wang Min2, Wang Qi4, Hu Yujie2   

  1. 1. China University of Geosciences, Beijing 100083, China;
    2. Exploration and Development Research Institute of Zhongyuan Oilfield Company, SINOPEC, Puyang, Henan 457001, China;
    3. Exploration and Production Research Institute, SINOPEC, Beijing 100083, China;
    4. Research Institute of Suruey and Design, Zhnngyuan Oilfield Company. SlNOPEC, Puyang, Henan 457001, China
  • Received:2005-09-18 Online:2006-02-25 Published:2012-01-16

Abstract:

Dongpu depression is a typical rifted basin in eastern China. The tectonic evolution of the basin includes an Early Paleozoic-Triassic cratonic basin cycle and a Cenozoic rift basin cycle. The latter can be subdivided into 4 stages, including initial rifting, intense rifting, late rifting and Late Tertiary integral downwar-ping. The basement extension in Dongpu depression increases, as a whole, from north to south. The extensional tectonic deformation is of simple shear extensional pattern in the upper earth crust, and of pure shear extensional pattern in the lower earth crust. The mutation zone of detachment surface might be the main factor causing the lateral tectonic transformation belt from Sangcunji to Qiaokou to Baimiao, and the difference of tectonic activity and the enrichment of oil and gas in the northern and southern parts of Dongpu depression.

Key words: extension, extensional pattern, tectonic evolution, rifted basin, Dongpu depression

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