Title: Study on the Mes-Cenozoic Tectonic Deformation and Basin-range Coupling Mechanism in the Western Part of South Tianshan, Xingjiang
Abstract: Ravines deep, strong folding, fracture aspect of the western part in South Tianshan, Tectonic evolution of Mesozoic and the strong uplift in Xinjiang area, and the subsequent large-scale rift-subsidence of the Tarim Basin are closely related, are under the control of a typical basin- range coupling mechanism. Analysis from the stratigraphic distribution of involved in folding and regional tectonic deformation feature, the Xinjiang area on the basis of the original the Tarim block, because of large-scale mantle upwelling, occurred uplifting in the late Mesozoic, and north western margin of western part in South Tianshan area formed strike NEE tectonic magmatic belt. Since the Cenozoic, strong thermal thinning effect of axis part in the Xinjiang uplift, leading to uplift occurred in the central part of large-scale rift, and gradually formed the Tarim basin. At the same time, tectonics and magmatic activities formed orogenic belt of western part in South Tianshan and the Tarim Basin constitute the larger(topography)potential difference, causing from the North West to South East decoupling of western part in South Tianshan. Regional fold formation for the first phase is transformed into a series of overturned fold, often show north west limb gently, strata are complete, the eastern limb steep or reversed nappe structure, even formed larger scale thrust- nappe structures in some anticline overturned limb, at the same time,produce a plurality of strike NW strike- slip fault, In order to regulate detachment inhomogeneity amplitude along strike. Therefore,western part of South Tianshan, and even the whole Xinjiang area, the regional tectonic evolution of the Mesozoic and Cenozoic analyses the geodynamic processes from the basin-mountain coupling. Perhaps this is to unravel key of complex deformation history of Southwest Tianshan mountain
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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