| THE BALANCED CROSS-SECTION AND SHORTENING IN QIANGTANG TERRAIN QINGHAI—TIBET PLATEAU |
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| 引用本文： | Li Yalin,Wang Chengshan,Wu Shan,Ding Xuelin[WT,”BX].THE BALANCED CROSS-SECTION AND SHORTENING IN QIANGTANG TERRAIN QINGHAI—TIBET PLATEAU[J].地学前缘,2000(Z1). |
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| 作者姓名： | Li Yalin Wang Chengshan Wu Shan Ding Xuelin[WT ”BX] |
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| 作者单位： | Institute of Sedimentary Geology，Chengdu University of Technology，Chengdu 610059，China |
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| 摘 要： | THE BALANCED CROSS-SECTION AND SHORTENING IN QIANGTANG TERRAIN QINGHAI—TIBET PLATEAU
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The Balanced Cross-Section and Shortening in Qiangtang Terrain Qinghai-Tibet Plateau |
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| Li Yalin,et al.The Balanced Cross-Section and Shortening in Qiangtang Terrain Qinghai-Tibet Plateau[J].Earth Science Frontiers,2000(Z1). |
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| Authors: | Li Yalin |
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| Abstract: | Geological studies indicate that Qinghai\|Tibet plateau crust has shortened at least 2500km and the thickness was increased to 60～70km in the past 45Ma. Different researchers advocate different views to explain the shortening according to their studies.( Tapponnier,1977;Chang et al,1986;England et al,1986;Murphy,1997;Y.Pan,1999),however it is still unresolved on how much shortening in upper crustal especially in Qiangtang terrain.Qiangtang terrain is located in the center of Qinghai\|Tibet plateau, the tectonic deformation has been resulted from intracontinental convergence and collision of India plate with Eurasian plate.The deformation style of Qiangtang terrain shows east\|west\|trending folds and thrusts which formed in the shallow tectonic level during collisional\|intracontinental period. The folds type is characterized by nonpenetrative\|foliation parallel fold, the hinges have the same trend with the thrusts. These traits are favourable for restoring the balanced cross\|section and measuring the shortening. The balanced reconstruction is based on line balancing on three different stratigraphic sections (A,B and C)across the Northern Qiangtang basin in the area between 85°E and 87°E.The sections are all north\|south\|trending in accordance with the moving direction of thrusts. |
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| Keywords: | Qiangtang terrain balanced cross\|section deformation style shortening |
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