Revised timing of rapid exhumation in the West Qinling: Implications for geodynamics of Oligocene-Miocene Tibetan plateau outward expansion
文献类型：期刊论文
| 作者 | Li, Chaopeng2,3; Zheng, Dewen2; Yu, Jingxing2; Lease, Richard O.1; Wang, Yizhou2; Pang, Jianzhang2; Wang, Ying2; Hao, Yuqi2; Xu, Yi-Gang3 |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2024-11-15 |
| 卷号 | 646页码:9 |
| 关键词 | Northeastern Tibetan Plateau West Qinling Apatite (U-Th)/He thermochronology Erosion surface Plateau expansion |
| ISSN号 | 0012-821X |
| DOI | 10.1016/j.epsl.2024.118966 |
| 英文摘要 | Two contrasting age models for initial mountain building in the northeastern (NE) Tibetan Plateau (Paleoceneearly Eocene versus late Oligocene-early Miocene) have led to the debate on how the deformed continental lithosphere absorbs plate convergence in general. The initial compressional deformation in the West Qinling (WQL) of the NE Tibetan Plateau figures prominently in this ongoing debate. Here, apatite (U-Th)/He (AHe) thermochronology combined with geomorphological analysis are used to refine the onset of compressional deformation in the WQL. New AHe ages from two vertical transects and an updated reconstruction of an obliquely-tilted erosion surface document the accelerated exhumation in the northern WQL at 23-22 Ma, interpreted as the onset of north-vergent thrusting. The AHe results, together with sedimentary records in the intermontane and foreland basins, suggest that the entire WQL began experiencing compressional deformation in the late Oligocene-early Miocene. When integrated with previous studies, our findings show that the northern plateau boundary has not remained stationary since the collision, but has instead experienced similar to 750 km of outward expansion during the late Oligocene to middle Miocene. This phase of rapid plateau growth is coeval with the similar to 30-50 % reduction of the India-Eurasia convergence rate, which suggests that the increased gravitational potential energy of orogenic belts played a key role in plate motion changes. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001309789700001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/81110]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Li, Chaopeng |
| 作者单位 | 1.US Geol Survey, Alaska Sci Ctr, Anchorage, AK 99508 USA 2.China Earthquake Adm, Inst Geol, State Key Lab Earthquake Dynam, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Chaopeng,Zheng, Dewen,Yu, Jingxing,et al. Revised timing of rapid exhumation in the West Qinling: Implications for geodynamics of Oligocene-Miocene Tibetan plateau outward expansion[J]. EARTH AND PLANETARY SCIENCE LETTERS,2024,646:9. |
| APA | Li, Chaopeng.,Zheng, Dewen.,Yu, Jingxing.,Lease, Richard O..,Wang, Yizhou.,...&Xu, Yi-Gang.(2024).Revised timing of rapid exhumation in the West Qinling: Implications for geodynamics of Oligocene-Miocene Tibetan plateau outward expansion.EARTH AND PLANETARY SCIENCE LETTERS,646,9. |
| MLA | Li, Chaopeng,et al."Revised timing of rapid exhumation in the West Qinling: Implications for geodynamics of Oligocene-Miocene Tibetan plateau outward expansion".EARTH AND PLANETARY SCIENCE LETTERS 646(2024):9. |
入库方式： OAI收割
来源：广州地球化学研究所
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