Oil & Gas Geology ›› 2006, Vol. 27 ›› Issue (4): 528-535.doi: 10.11743/ogg20060414

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Tectonic setting and geological evolution of Mohe basin in Northeast China

Wu Genyao1, Feng Zhiqiang2, Yang Jianguo2,3, Wang Zaijun2, Zhang Liguo2, Guo Qingxia2   

  1. 1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029;
    2. Exploration and Development Research Institute of PetroChina Daqing Oilfield Company Ltd., Daqing, Helongjiang 163712;
    3. School of Earth and Space Sciences, Peking University, Beijing 100871
  • Received:2006-03-10 Online:2006-08-25 Published:2012-01-16

Abstract:

Based on the sedimentary features and facies change of the Upper Jurassic in Mohe basin and supported by many other evidences,it is proposed for the first time that the late Jurassic Mohe basin is a molasse basin controlled by the Yanshanian intracontinental orogeny,which was caused by the activation of the fossil suture zones related to subduction of the Mongolia-Ochotsk ocean.Three stages of the development of the basin have been established and the northward migration feature of its dynamic evolution has been identified.At the end of Jurassic the basin closed and was reformed by the W-E trending thrusts(the main deformation episode) along with continent-continent collision.From the Cretaceous to the Eogene,two phases of reformation happened in the basin and their structure features are nearly NNE trending transtentional faults,with at least three deformation episodes recognized and W-E trending normal faults.In terms of oil and gas exploration potential,the central,eastern,and southern part of the basin are more promising than the rest parts of the basin.

Key words: foreland basin, Yanshanian intracontinental orogeny, formation and reformation, Late Jurassic, Mohe in Heilongjiang

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