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Three evolutionary stages of the collision orogenic deformation in the Middle Yangtze Region |
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| Authors: | SUN Yan SHU LiangShu ZHU Wenbin GUO Jichun CHEN Xiangyun MFaure JCharvet WLin |
| Institution: | 1. State Key Laboratory of Mineral Deposits, Department of Earth Sciences, Nanjing University, Nanjing 210093, China; 2. Geological Survey institute of Jiangxi Province, Nanchang 330201, China; 3. Department of Earth Sciences, Orleans University, BP 6759, Orleans, France |
| Abstract: | A discussion of collision orogenic deformation has been made for the Middle Yangtze Region. Based on its deformation assemblage orders, three developing stages are classified successively as compression thrust uplift, strike-slip escape rheology and tension extension inversion. The collision orogenesis of the studied region has been divided into three developing periods of initial, chief and late orogeny. Based on the data from Wugong Mts., Jiuling Mts. and Xuefeng Mts., for each stage, its variation of stress and strain axes, the conversion of joint fractures and their relative tectonic evolution are described, models are plotted and corresponding explanations are made for the rock chronology dating value in the same tectonic period. |
| Keywords: | collision orogenesis deformation tectonic evolution the Middle Yangtze Region |
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