Deep electrical structure beneath Sichuan-Yunnan area in the eastern margin of the Tibetan Plateau

摘要

In response to the ongoing convergence between Indian and Eurasian plates, significantrnintracontinental deformation has been accommodated by crustal thickening on large-scale strike slip faults.rnSeveral modes have been proposed to explain the deformation of the eastern Tibetan Plateau, including: (1)rnlateral extrusion of rigid blocks, in which deformation is primarily localized along strike-slip faults thatrnbound the block; (2) continuous deformation lithosphere; (3) ductile channel flow in the mid-lower crust. Thernmechanisms for Tibetan Plateau deformation and expansion have remained enigmatic due to the resolutionrnlimitations of methods and data. The major characteristics are dominated by the large-scale clockwisernrotation around the Eastern Himalayan Syntaxis in the southeast margin of the Tibetan Plateau. The debatesrnof these models center around whether the deformation is localized to the mantle or to the upper crust. Thernsoutheast margin of the Tibetan Plateau, which have undergone significant crustal thickening and tectonicrnextrusion, is particularly important for researching the kinematics and dynamics of intracontinentalrndeformation.