Deep Crustal Structure Beneath the Pamir-Tibetan Plateau: Insights From the Moho Depth and Vp/Vs Ratio Variation
文献类型：期刊论文
| 作者 | Murodov, Davlatkhudzha1,2; Mi, Wang1; Murodov, Amirkhamza3; Oimuhmmadzoda, Ilhomjon2; Abdulov, Sherzod2,4; Xin, Wang1 |
| 刊名 | FRONTIERS IN EARTH SCIENCE
 |
| 出版日期 | 2022-03-15 |
| 卷号 | 10页码:12 |
| 关键词 | crustal composition Vp Vs ratio Pamir-Tibetan plateau crustal structure continental subduction |
| DOI | 10.3389/feart.2022.821497 |
| 英文摘要 | The Cenozoic convergence between India and Asia has created Earth's thickest crust in the Pamir-Tibetan plateau, leading to broadly distributed deformation and extensive crustal shortening; however, the crustal deformation of the high plateau is still poorly constrained. The variation of the Moho topography and crustal composition beneath the Pamir-Tibetan plateau has an important correlation with the major tectonic units. In this study, the results of the receiver functions have been reviewed and analyzed to observe variations in the Moho depth and crustal Vp/Vs ratio beneath the Pamir-Tibetan plateau. We found a notable SE-NW-oriented deep Moho interface that starts from the southeast of the Tibetan plateau and continues to the eastern Pamir with a northward dipping direction, which may indicate the northern frontier of the decoupled lower crust of northward underthrusting of the Indian plate. In contrast, the deepest Moho beneath the Pamir plateau has a southward dipping direction indicating the southward underthrusting Asian plate. In general, the average crustal Vp/Vs ratio is relatively low beneath the South-Central Pamir (similar to 1.70), while it is relatively higher (similar to 1.75) under the Himalaya-Lhasa terrane, suggesting more felsic to intermediate rock composition with locally high values indicating a low-velocity zone, possibly caused by partial melting. Elevated Vp/Vs ratios are observed beneath the northern Pamir (>1.77) and Qiangtang and Songpan-Ganze terranes (>1.80), which can be related to the high mafic rock content and upwelling hot materials from the upper mantle. The Vp/Vs ratio beneath the Pamir-Tibetan plateau presents complex north-south variations with a relatively low crustal Vp/Vs ratio in the south, while it gradually increases toward the north of the Pamir and central-northern Tibet, which is probably caused by the joint effects of the northward underthrusting Indian lower crust and southward subduction of the Asian plate, the low-velocity zones within the mid-upper crust, and substantial crustal shortening and thickening. The low to average crustal Vp/Vs ratio throughout the plateau (except the central Tibet) indicates a limited amount of hot materials to support the low crustal channel flow model, instead suggesting that crustal thickening and shortening is the main uplifting mechanism of the Pamir-Tibetan plateau. |
| WOS关键词 | INDIAN LITHOSPHERE BENEATH ; HINDU-KUSH ; BREAK-OFF ; CONTINENTAL CHINA ; SUBDUCTION ; DEFORMATION ; ASIA ; CONSTRAINTS ; TECTONICS ; EVOLUTION |
| 资助项目 | National Natural Science Foundation of China[42072211] ; second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0602] ; open foundation of MOE Key Laboratory of Western China's Environmental Systems[lzujbky-2021-kb01] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000778686600001 |
| 出版者 | FRONTIERS MEDIA SA |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; open foundation of MOE Key Laboratory of Western China's Environmental Systems ; open foundation of MOE Key Laboratory of Western China's Environmental Systems ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; open foundation of MOE Key Laboratory of Western China's Environmental Systems ; open foundation of MOE Key Laboratory of Western China's Environmental Systems ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; open foundation of MOE Key Laboratory of Western China's Environmental Systems ; open foundation of MOE Key Laboratory of Western China's Environmental Systems ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; open foundation of MOE Key Laboratory of Western China's Environmental Systems ; open foundation of MOE Key Laboratory of Western China's Environmental Systems |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/105115]  |
| 专题 | 地质与地球物理研究所_中国科学院新生代地质与环境重点实验室 |
| 通讯作者 | Xin, Wang |
| 作者单位 | 1.Lanzhou Univ, Coll Earth & Environm Sci, Minist Educ, Key Lab Western Chinas Environm Syst, Lanzhou, Peoples R China 2.Natl Acad Sci Tajikistan, Inst Geol Earthquake Engn & Seismol, Dushanbe, Tajikistan 3.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Murodov, Davlatkhudzha,Mi, Wang,Murodov, Amirkhamza,et al. Deep Crustal Structure Beneath the Pamir-Tibetan Plateau: Insights From the Moho Depth and Vp/Vs Ratio Variation[J]. FRONTIERS IN EARTH SCIENCE,2022,10:12. |
| APA | Murodov, Davlatkhudzha,Mi, Wang,Murodov, Amirkhamza,Oimuhmmadzoda, Ilhomjon,Abdulov, Sherzod,&Xin, Wang.(2022).Deep Crustal Structure Beneath the Pamir-Tibetan Plateau: Insights From the Moho Depth and Vp/Vs Ratio Variation.FRONTIERS IN EARTH SCIENCE,10,12. |
| MLA | Murodov, Davlatkhudzha,et al."Deep Crustal Structure Beneath the Pamir-Tibetan Plateau: Insights From the Moho Depth and Vp/Vs Ratio Variation".FRONTIERS IN EARTH SCIENCE 10(2022):12. |
入库方式： OAI收割
来源：地质与地球物理研究所
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