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Geoscience ›› 2011, Vol. 25 ›› Issue (3): 447-455.

• structural geology • Previous Articles     Next Articles

Dynamic BasinOrogen Coupling and Sequence Response Process:Taking LanpingSimao Basin, Western Yunnan as a Case

 YANG  Xin-1, 2 , ZHENG  Jian-Jing-1, LIU  Xin-Wang-1, 2 , SU  Long-1, LIU  Yu-Hu-1, 2 , LIU  Yan-Gong-3   

  • Online:2011-06-22 Published:2011-06-23

Abstract:

Accompanied with the orogenic belt evolution stage from collision to postcollision and intraplate stage, the coupled basins transform from foreland basin to extensional basin and strikeslip structural basin, which is considered as the dynamical basinorogen coupling model. The MesozoicCenozoic basinorogen coupling of Sanjiang region of western Yunnan is a typical example of this conceptual model. Based on strata and outcrops, we divide Mesozoic strata of LanpingSimao basin into 3 second sequences and 11 third sequences. The 3 second sequences corresponded to the evolutional stage of foreland basin, extensional basin and strikeslip structural basin, on behalf of each single prototype of the sedimentary basin filling. The growth of 11 third sequences controlled by several times noncyclical basin basement activities including repeatedly deflection response to thrust load, episodic faulting activity of basement, and strikeslip structural function.

Key words: sequence stratigraphy, sedimentary response, basinorogen coupling, basin dynamics, postcollision extensional basin