Constructing the Longmen Shan eastern Tibetan Plateau margin: Insights from low-temperature thermochronology
文献类型：期刊论文
| 作者 | Tian, Yuntao1,2; Kohn, Barry P.1; Gleadow, Andrew J. W.1; Hu, Shengbiao2 |
| 刊名 | TECTONICS
 |
| 出版日期 | 2013-06-01 |
| 卷号 | 32期号:3页码:576-592 |
| 关键词 | Tibetan Plateau Longmen Shan low-temperature thermochronology out-of-sequence thrusting intracontinental tectonics |
| DOI | 10.1002/tect.20043 |
| 文献子类 | Article |
| 英文摘要 | Contrasting models of upper crustal shortening versus lower crustal flow have been proposed to explain the formation of thickened crust in the Longmen Shan (LMS), eastern Tibetan Plateau (TP) margin. These models require different structural kinematics along the LMS, whose structural geometry is defined by three parallel NW-dipping fault zones. From foreland (southeast) to hinterland (northwest), they are the Guanxian-Anxian Fault, Yingxiu-Beichuan Fault (YBF), and Wenchuan-Maowen Fault (WMF). Newly derived and previously published low-temperature thermochronology data from the LMS were synthesized to constrain the spatial exhumation and test previous models. The results show that (1) exhumation increases abruptly across the range-bounding YBF, suggesting the fault being the main thrust boundary between the LMS and the Sichuan Basin to the east; (2) Younger Late Cenozoic cooling ages are found on the hinterland WMF, where a dichotomy of ages on the hanging wall versus footwall suggests Late Cenozoic thrust activity; and (3) toward the hinterland to the west, exhumation rates decrease twofold over a distance of similar to 30-40km. This exhumation pattern indicates a westward decrease of tectonic uplift, providing the regional topography approached a steady state, whereby exhumation is in balance with tectonic uplift. The observed exhumation estimates support an upper crustal configuration where thrusts in the LMS merge gradually into a gentle detachment seated at a depth of similar to 20-30km. Results of this study support a revised upper crustal thrusting model. |
| WOS关键词 | 2008 WENCHUAN EARTHQUAKE ; FISSION-TRACK THERMOCHRONOLOGY ; LOWER CRUSTAL FLOW ; APATITE (U-TH)/HE THERMOCHRONOMETRY ; KUNLUN FAULT ZONE ; GARZE FOLD BELT ; SICHUAN BASIN ; RADIATION-DAMAGE ; XIANSHUIHE FAULT ; NORTHERN TIBET |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000322124300017 |
| 资助机构 | China National Oil-Gas Major Special Projects(2011ZX05008-002) ; China National Oil-Gas Major Special Projects(2011ZX05008-002) ; IPRS at the University of Melbourne ; IPRS at the University of Melbourne ; MIRS at the University of Melbourne ; MIRS at the University of Melbourne ; China National Oil-Gas Major Special Projects(2011ZX05008-002) ; China National Oil-Gas Major Special Projects(2011ZX05008-002) ; IPRS at the University of Melbourne ; IPRS at the University of Melbourne ; MIRS at the University of Melbourne ; MIRS at the University of Melbourne |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/62524]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 作者单位 | 1.Univ Melbourne, Sch Earth Sci, Melbourne, Vic 3010, Australia 2.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tian, Yuntao,Kohn, Barry P.,Gleadow, Andrew J. W.,et al. Constructing the Longmen Shan eastern Tibetan Plateau margin: Insights from low-temperature thermochronology[J]. TECTONICS,2013,32(3):576-592. |
| APA | Tian, Yuntao,Kohn, Barry P.,Gleadow, Andrew J. W.,&Hu, Shengbiao.(2013).Constructing the Longmen Shan eastern Tibetan Plateau margin: Insights from low-temperature thermochronology.TECTONICS,32(3),576-592. |
| MLA | Tian, Yuntao,et al."Constructing the Longmen Shan eastern Tibetan Plateau margin: Insights from low-temperature thermochronology".TECTONICS 32.3(2013):576-592. |
入库方式： OAI收割
来源：地质与地球物理研究所
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