Pn uppermost mantle tomography of Central Tibet: Implication for mechanisms of N-S rifts and conjugate faults
文献类型：期刊论文
| 作者 | Nie, Shitan1,4; Tian, Xiaobo1,3; Liang, Xiaofeng1,2; Chen, Yun1,2; Xu, Tao1,3 |
| 刊名 | TECTONOPHYSICS
 |
| 出版日期 | 2020-08-05 |
| 卷号 | 788页码:10 |
| ISSN号 | 0040-1951 |
| 关键词 | Tibetan Plateau Pn velocity Indian lithospheric slab North-south trending rifts Conjugated strike-slip faults |
| DOI | 10.1016/j.tecto.2020.228499 |
| 英文摘要 | The north-south convergence between the Indian and Eurasian continents since Cenozoic has produced the Tibetan plateau, and east-west extension structures have also developed since late Cenozoic. Whether these extensional structures are limited to the crust or extend to the deep lithosphere remains controversial. The uppermost mantle serves as a link between the crust and deep lithosphere, the velocity structure of which provides an important constraint on exploring the mechanism of extensional structures. Based on Pn traveltime data recorded by the SANDWICH network in central Tibet, we use the interstation traveltime difference method to obtain the uppermost mantle velocity structure. Our results show significant velocity differences for the uppermost mantle beneath the conjugated strike-slip faults and rifts, which indicates their different formation mechanisms. The high Pn velocity beneath the conjugated strike-slip faults support an eastward horizontal shear at the base of the upper crust rather than the lower crust has contributed to the development of the conjugated strike-slip faults. The low Pn velocity beneath the rifts in Lhasa may provide evidence for the rifts cutting through the entire crust and reflect the connection between the formation of the rifts and deep tectonic activities. The most prominent features in our results are the low Pn velocity zones beneath the Tangra Yum Co Rift (TYR), the Pumqu-Xianza Rift (PXR) and the zone between the two rifts, and we explain the low Pn velocity as the top of the mantle wedge upon the subducting Indian lithospheric slab. |
| WOS关键词 | VELOCITY STRUCTURE BENEATH ; INDIAN LITHOSPHERE BENEATH ; EAST-WEST EXTENSION ; YADONG-GULU RIFT ; SOUTHERN TIBET ; ANISOTROPIC TOMOGRAPHY ; EARTHQUAKES BENEATH ; QIANGTANG TERRANE ; CRUSTAL STRUCTURE ; SEISMIC ARRAY |
| 资助项目 | National Key R&D Program of China[2016YFC0600301] ; strategic Priority Research Program (B) of the Chinese Academy of Science[XDB03010700] ; National Natural Science Foundation of China[41974053] ; National Natural Science Foundation of China[41574048] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000540731100002 |
| 资助机构 | National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/96897]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Tian, Xiaobo |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Nie, Shitan,Tian, Xiaobo,Liang, Xiaofeng,et al. Pn uppermost mantle tomography of Central Tibet: Implication for mechanisms of N-S rifts and conjugate faults[J]. TECTONOPHYSICS,2020,788:10. |
| APA | Nie, Shitan,Tian, Xiaobo,Liang, Xiaofeng,Chen, Yun,&Xu, Tao.(2020).Pn uppermost mantle tomography of Central Tibet: Implication for mechanisms of N-S rifts and conjugate faults.TECTONOPHYSICS,788,10. |
| MLA | Nie, Shitan,et al."Pn uppermost mantle tomography of Central Tibet: Implication for mechanisms of N-S rifts and conjugate faults".TECTONOPHYSICS 788(2020):10. |
入库方式： OAI收割
来源：地质与地球物理研究所
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