Oil & Gas Geology ›› 2021, Vol. 42 ›› Issue (2): 251-264.doi: 10.11743/ogg20210201

• Petroleum Geology • Previous Articles     Next Articles

Impacts of the closure of eastern Mongolia-Okhotsk Ocean on formation and evolution of Songliao Basin

Zhiqiang Feng1(), Li Dong1, Ying Tong2, Zihui Feng3, Shun Zhang3, Gaokui Wu1, Qiang Ren4   

  1. 1. Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083, China
    2. Beijing SHRIMP Center of the Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China
    3. Petroleum Exploration and Development Research Institute of Daqing Oilfield Company, PetroChina, Daqing, Heilongjiang 163712
    4. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, Sichuan 610059, China
  • Received:2021-02-01 Online:2021-04-28 Published:2021-04-21

Abstract:

Songliao Basin is a large non-marine petroliferous basin of the Cretaceous in Northeast China.It is generally believed that its tectonic evolution is mainly controlled by the westward subduction of the Western Pacific Plate.What is the dynamic mechanism in forming a large depression basin only in Northeast China within the Western Pacific tectonic belt? Why are there two stages of volcanism (Huoshiling Formation and Yingcheng Formation) developed in the rifting stage of Songliao Basin? Why are the Mesozoic magmatic rocks prone to get developed in Northeast China? Obviously, it's difficult to explain these questions merely by Pacific Plate activities.The closure of Mongolia-Okhotsk Ocean is the most important tectonic event in Northeast Asia in the Mesozoic.There is no doubt that the plate subduction, collision, subsequent compression, extension and magmatic activity would have significant effects on the formation and evolution of the basins and mountains in Northeast Asia.Based on existing research results, this paper analyzes the influence of the closure of the eastern Mongolia-Okhotsk Ocean on the formation and evolution of Songliao Basin from the perspectives of regional dynamics, temporal and spatial distribution characteristics of volcanic rocks and tectonic evolution of sedimentary basins.Besides, a genetic model of bidirectional subduction between the Mongolia-Okhotsk Ocean and the West Pacific Plate is proposed for the formation of Songliao Basin, under the effect of which multiple transitions between compression and extension mechanisms in Northeast China are delineated.In all, the formation and evolution of Songliao Basin are re-recognized from brand-new perspectives, while reasonably interpreting the differential magmatic activities between Northeast China and southern West Pacific during the Late Jurassic and Early Cretaceous.

Key words: tectonic evolution, bidirectional subduction pattern, magnatic rock, suture zone, Songliao Basin, Mongolia-Okhotsk Ocean, Northeast Asia

CLC Number: