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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2008  >  30(4): 424-428
Liu Yuping, Yin Hongwei, Zhang Jie, Xu Shijin, Xie Guoai. PHYSICAL MODELING ON DOUBLE DECOLLEMENTS STRUCTURE IN FOLD-AND-THRUST BELT[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2008, 30(4): 424-428. doi: 10.11781/sysydz200804424
Citation: Liu Yuping, Yin Hongwei, Zhang Jie, Xu Shijin, Xie Guoai. PHYSICAL MODELING ON DOUBLE DECOLLEMENTS STRUCTURE IN FOLD-AND-THRUST BELT[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2008, 30(4): 424-428. doi: 10.11781/sysydz200804424
shu

PHYSICAL MODELING ON DOUBLE DECOLLEMENTS STRUCTURE IN FOLD-AND-THRUST BELT

doi: 10.11781/sysydz200804424

  • Department of Earth Sciences, Nanjing University, Nanjing, Jiangsu 210093, China

  • Received Date: 2007-08-02
  • Rev Recd Date: 2008-05-30
  • Publish Date: 2008-07-28
    Abstract
  • Fold-and-thrust belt is an important component in orogen-foreland basin system.Decollement plays a remarkable role in its formation and development.In order to study geometric and kinematic characteristics of fold-and-thrust belt which has 2 decollements with different thickness and position,a series of scaled physical modeling experiments have been done.Deformations of models with shortening increase are photoed.In fold-and-thrust belt with 2 decollements,forward thrusts which propagate from the lower decollement form the main thrusts,and their development obeys forward pattern.In the hanging wall of thrust,rock layers bend above the upper decollement and form fault-related fold.When the 2 decollements are close to each other,they work together and control thrust development,forming less forward thrusts,yet favorable for backward thrusts.While they are widely spaced,the lower decollement mainly controls thrusts development.More forward thrusts and less backward thrusts are formed.

     

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