Oil & Gas Geology ›› 2006, Vol. 27 ›› Issue (3): 326-331.doi: 10.11743/ogg20060306

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A discussion on Kaijiang-Liangping ocean trough

Ma Yongsheng1, Mou Chuanlong2, Tan Qinyin2, Yu Qian2   

  1. 1. Southern Exploration and Development Division Company, SINOPEC, Kunming, Yunnan 650200;
    2. Chengdu Institute of Geology and Mineral Resources, Chengdu, Sichuan 610082
  • Received:2006-04-27 Online:2006-06-25 Published:2012-01-16

Abstract:

It is previously believed that Kaijiang-Liangping area was an ocean trough during Changxing age of Late Permian-Early Indo-Chinese epoch in Early Triassic,and was called "Kaijiang-Liangping ocean trough".The understanding and definition of the sedimentary framework in this area are directly related with exploration deployment in the northeastern part of Sichuan basin.Based on sedimentological study and the new understan-(dings) obtained from drilling and seismic data,it is demonstrated,in respects of tectonic setting and the concept and sedimentation of ocean trough,that Kaijiang-Liangping area was not an ocean trough during Changxing age of Late Permian-early Early Triassic,but a platform-shelf with relatively deep water within a carbonate platform,and the sediment was dominated by micrite with some high energy shoal deposits.

Key words: ocean trough, platform-shelf, sedimentary framework, Kaijiang-Liangping area, Sichuan basin

CLC Number: