Crustal deformation in the southeastern margin of the Tibetan Plateau: insights from broad-band Pg-wave attenuation tomography
文献类型：期刊论文
| 作者 | Li, Ruo-Jie1,4; Zhao, Lian-Feng1,2; Xie, Xiao-Bi3; Yao, Zhen-Xing1 |
| 刊名 | GEOPHYSICAL JOURNAL INTERNATIONAL
 |
| 出版日期 | 2023-09-18 |
| 卷号 | 235期号:3页码:2870-2886 |
| 关键词 | Asia Body waves Seismic attenuation Seismic tomography Crustal structure Large igneous provinces |
| ISSN号 | 0956-540X |
| DOI | 10.1093/gji/ggad404 |
| 英文摘要 | The deformation mechanism in southeastern Tibet since the continental collision between the Indian and Eurasian plates could be explained by several models, including two major classic end-member models, the rigid-block extrusion model and the crustal flow model. Crustal channel flow is likely an important tectonic regime for properly explaining a large number of geological and geophysical observations but remains in competition with the block extrusion model. Consequently, detecting ductile flow connectivity would play a key role in understanding the tectonic evolution of the southeastern Tibetan Plateau. Here, we established a high-resolution broad-band QPg model for the crust in SE Tibet by using a joint inversion tomography method based on both single- and two-station Pg data. We verified the stability of the QPg tomography by comparing the QPg values at 1 Hz between the joint inversion and the two-station method. Two low-QPg zones were observed, isolated by the high-QPg Emeishan large igneous province (ELIP). Strong Pg attenuation beneath the Songpan-Ganzi Block and Western Sichuan Block may indicate the presence of crustal material flow due to relatively weak rheological strength. Cooled basaltic magma remnants in the inner zone of the ELIP likely block the southeastward migration of crustal materials driven by the gravity and lateral pressure gradient, and restrict the flow to the Western Sichuan Block, resulting in surface uplift and crustal thickening. Strong Pg attenuation near the Xiaojiang Fault and the Red River Fault may result from mantle upwelling in this region. Our QPg model, combined with previous results, suggests that the tectonic deformation in the southeastern Tibetan Plateau has been mainly controlled by the effects of crustal channel flow and asthenospheric upwelling since the Late Miocene. |
| WOS关键词 | BENEATH SE TIBET ; REGIONAL SEISMIC PHASES ; LARGE IGNEOUS PROVINCE ; LG ATTENUATION ; SPECTRAL CHARACTERISTICS ; SOUTHWEST CHINA ; JOINT INVERSION ; UNITED-STATES ; HEAT-FLOW ; SW CHINA |
| 资助项目 | National Natural Science Foundation of China[U2139206] ; National Natural Science Foundation of China[41974061] ; National Natural Science Foundation of China[41974054] ; National Natural Science Foundation of China[2019CSES0103] ; National Natural Science Foundation of China |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001124759000005 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | 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 Natural Science Foundation of China ; 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 Natural Science Foundation of China ; 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 Natural Science Foundation of China ; 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 Natural Science Foundation of China ; 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 Natural Science Foundation of China ; 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 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/132A11/111685]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Zhao, Lian-Feng |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Heilongjiang Mohe Observ Geophys, Beijing 100029, Peoples R China 3.Univ Calif Santa Cruz, Inst Geophys & Planetary Phys, Santa Cruz, CA 95064 USA 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Ruo-Jie,Zhao, Lian-Feng,Xie, Xiao-Bi,et al. Crustal deformation in the southeastern margin of the Tibetan Plateau: insights from broad-band Pg-wave attenuation tomography[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2023,235(3):2870-2886. |
| APA | Li, Ruo-Jie,Zhao, Lian-Feng,Xie, Xiao-Bi,&Yao, Zhen-Xing.(2023).Crustal deformation in the southeastern margin of the Tibetan Plateau: insights from broad-band Pg-wave attenuation tomography.GEOPHYSICAL JOURNAL INTERNATIONAL,235(3),2870-2886. |
| MLA | Li, Ruo-Jie,et al."Crustal deformation in the southeastern margin of the Tibetan Plateau: insights from broad-band Pg-wave attenuation tomography".GEOPHYSICAL JOURNAL INTERNATIONAL 235.3(2023):2870-2886. |
入库方式： OAI收割
来源：地质与地球物理研究所
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