Oil & Gas Geology ›› 2006, Vol. 27 ›› Issue (4): 522-527.doi: 10.11743/ogg20060413

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A study on characteristics of the Late Cretaceous-Paleocene structures in Jiuquan Basin

Cheng Xiaogan, Zheng Dewen, Yang Shufeng, Xiao Ancheng, Chen Hanlin   

  1. Department of Earth Sciences, Zhejiang University, Hangzhou, Zhejiang 310027
  • Received:2006-04-27 Online:2006-08-25 Published:2012-01-16

Abstract:

The unconformity between the Eocene and the Lower Cretaceous is common in Jiuquan basin.Based on analyses of the seismic profiles and remnant thickness of the Lower Cretaceous Zhonggou Formation,it is suggested that a strong structural deformation had happened during the Late Cretaceous-Paleocene,resulting in generally NW-trending structural lines in the basin.The deformation resulted in the separation of Jiuquan Basin from Minle Basin that were previous connected in the Early Cretaceous and Huahai depression from Shida depression in Jiuquan basin.It also controlled the hydrocarbon accumulation and the later sedimentation in the basin.

Key words: Late Cretaceous-Paleocene, structural deformation, unconformity, Jiuquan Basin

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