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| Tectonic evolution of the Dabieshan orogen: In the view from polyphase deformation of the Beihuaiyang metamorphic zone | |
| 作者姓名： | LIN Wei Faure Michel WANG Qingchen & Arnaud Nicolas . LTE Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China . |
| 作者单位： | 1. LTE,Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;Department of Earth and Planetary Sciences, Graduate School of Science, Nagoya University,Japan 2. ISTO, UMR CNRS 6113, Batiment Géosciences, Orléans Université d'Orléans, 45067 Orléans Cedex 2, France 3. LTE,Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 4. UMR 6524 "Magmas et Volcans", 5 Rue Kessler,63000 Clermont-Ferrand,France |
| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金，post-doctor grant for Lin W. From the JSPS |
| 摘 要： | The Dabieshan and its geological counterpart in the Sulu area represent the eastern part of the Qinling-Dabie orogenic belt in Eastern China. This Orogen corresponds to the collision zone between the North and South China blocks (denoted as NCB and SCB, respectively) during the Early Mesozoic. Since the discovery of ultra-high-pressure (UHP) metamor- phism1?3], research of the Dabieshan has made great progress from petrological work (e.g. Cong and Wang, 1999 and enclosed references)… |
Tectonic evolution of the Dabieshan orogen: In the view from polyphase deformation of the Beihuaiyang metamorphic zone |
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| LIN Wei,Faure Michel,WANG Qingchen,Arnaud Nicolas.Tectonic evolution of the Dabieshan orogen: In the view from polyphase deformation of the Beihuaiyang metamorphic zone[J].Science in China(Earth Sciences),2005,48(7). | |
| Authors: | LIN Wei Faure Michel WANG Qingchen Arnaud Nicolas |
| Abstract: | The Beihuaiyang metamorphic zone was formed by the Early Mesozoic collision of the North and South China Blocks. It consisted of the Foziling and Luzhenguan complexes and was thought to have never afforded a deep subduction. A similar feature of the deformation in the Dabieshan UHP metamorphic rocks implies that these different tectonic units share the same geodynamic background. The early stage of deformation can be preserved on account of their relatively shallower subduction than that for UHP rocks. On the basis of an analysis of the geo- logical structure and geochronological results, five deformational stages have been recognized: a D1-Early compressional deformation which represents the continental subduction; a D2-Early exhumation deformation producing a syn-convergence exhumation; a D3-Main deformation, represented by an exhumation deformation with Late Triassic age; a D4-Doming and its margin extensional gravity collapse deformation and finally a D5-regional extensional deformation of Cretaceous that was mostly introduced by the migmatization and plutonism. |
| Keywords: | Beihuaiyang metamorphic zone geometry kinematic polyphase deformation tectonic evolution |
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