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Numerical simulation of the influence of lower-crustal flow on the deformation of the Sichuan-Yunnan Region

Numerical simulation of the influence of lower-crustal flow on the deformation of the Sichuan-Yunnan Region,10.1007/s11589-007-0617-7,Acta Seismologic

Numerical simulation of the influence of lower-crustal flow on the deformation of the Sichuan-Yunnan Region   (Citations: 1)
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On the basis of distribution of active fault and regional rheological structure, a three-dimensional finite element model of Sichuan-Yunnan region, China, is constructed to simulate contemporary crustal motion and stress distribution and discuss the dynamic mechanism of crustal motion and deformation in the Sichuan-Yunnan region. Linear Maxwell visco-elastic model is applied, which includes the active fault zones, the elastic upper crust and viscous lower crust and upper mantle. Four different models with different boundary conditions and deep structure are calculated. Some conclusions are drawn through comparison. Firstly, the crustal rotation about the eastern syntaxis of the Himalaya in the Sicuan-Yunnan region may be controlled by the special dynamic boundary condition. The drag force of the lower-crust on the upper crust is not negligible. At the same time, the main active fault zones play an important role in the contemporary crustal motion and deformation in Sichuan-Yunnan region.
Journal: Acta Seismologica Sinica , vol. 20, no. 6, pp. 617-627, 2007
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