On the Geodynamic Mechanism of Episodic Uplift of the Tibetan Plateau during the Cenozoic Era |
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| Authors: | WANG Guocan CAO Kai WANG An SHEN Tianyi ZHANG Kexin WANG Liquan |
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| Institution: | [1]State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China [2]Center for Global Tectonics, China University ofGeosciences, Wuhan 430074, China [3]School of Earth Sciences, China University ofGeosciences, Wuhan 430074, China [4]Key Laboratory of Biological and Environmental Geology of Ministry of Education, China University of Geosciences, Wuhan 430074, China [5]Chengdu Institute of Geology and Minerals Resources, Chengdu 610081, China |
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| Abstract: | Multi-stage uplift of the Tibetan Plateau during the Cenozoic implies a complex geodynamic process. In this paper, we review main geodynamic models for the uplift of the plateau, and, in particular, analyze the spatio-temporal framework of the Cenozoic deformation structures, which are closely related to the deep geodynamic mechanism for the plateau uplift. From this perspective, significant change of the deformation regime over the Tibetan Plateau occurred by the middle-late Miocene, while thrust and thrust-folding system under NS compression was succeded by extension or stress-relaxation. Meanwhile, a series of large-scale strike-slip faults commenced or was kinemtically reversed. Based on a systematic synthesis of the structure deformation, magmatism, geomorphological process and geophysical exploration, we propose a periodical model of alternating crustal compression and extension for episodic uplift of the Tibetan Plateau. |
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| Keywords: | Tibetan Plateau Cenozoic episodic uplift geodynamic mechanism |
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