Lithospheric Structures beneath the Tibetan Plateau Constrained by Sn Propagation Efficiency
文献类型：期刊论文
| 作者 | Jiang, Mengfan; Sun, Weijia; Hu, Jiamin; Tang, Qingya |
| 刊名 | LITHOSPHERE
 |
| 出版日期 | 2022 |
| 卷号 | 2022期号:1页码:13 |
| ISSN号 | 1941-8264 |
| DOI | 10.2113/2022/4073788 |
| 英文摘要 | The uppermost mantle is a crucial region linking the lower crust and lithospheric mantle and carries important dynamic and structural information (e.g., upwelling and delamination) on interactions between the crust and mantle. An intriguing observation of an inefficient Sn wave zone beneath the Tibetan Plateau was reported but had unclear spatial distributions. By analyzing the Sn wave propagation efficiency from 34,917 Sn wave arrivals, we provide strong constraints on the lateral and depth variations in the inefficient Sn wave zone in the Tibetan Plateau. Our results show that with increasing frequencies, the inefficient Sn wave zone becomes larger, expanding to the eastern Songpan-Ganze terrane and then to the Sanjiang area and the southern margin of the Qilian orogenic belt. The northern and eastern boundaries of the inefficient Sn zone, particularly a small inefficient zone in the Qilian orogenic belt (37 degrees N, 102 degrees E), are clearly depicted, indicating the widespread distribution of the seismic attenuation structure or partial melt in the uppermost mantle. Moreover, we provide the depth variations in the inefficient Sn wave zone by simulating 31,538 3D raypaths with the fast marching method. We therefore constrain the depth range of the partial melt region in the uppermost mantle beneath the Tibetan Plateau. The seismic attenuation structure in the northern-central Qiangtang terrane and western Songpan-Ganze terrane extends to 130km from the bottom of the crust, whereas that in the eastern Songpan-Ganze terrane and Sanjiang area is thinner and mainly concentrated from 90 to 130 km. Combining this information with the temporal and spatial variations in potassic-ultrapotassic magmatic rocks, it is suggested that asthenospheric materials might upwell and flow laterally beneath the Tibetan Plateau. This behavior provides a thermal driving force for the uplift of the plateau and the deformation of the crust-mantle structure. |
| WOS关键词 | UPPERMOST MANTLE ; INDIAN LITHOSPHERE ; EASTERN CHINA ; AMBIENT NOISE ; TOMOGRAPHY ; EVOLUTION ; SURFACE ; CRUST ; PN ; DEFORMATION |
| 资助项目 | National Natural Science Foundation of China[41774060] ; National Natural Science Foundation of China[42022026] ; National Natural Science Foundation of China[41720104006] ; Youth Innovation Promotion Association CAS |
| WOS研究方向 | Geochemistry & Geophysics ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000793029800004 |
| 出版者 | GEOSCIENCEWORLD |
| 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 ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/105966]  |
| 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 | Sun, Weijia |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Mengfan,Sun, Weijia,Hu, Jiamin,et al. Lithospheric Structures beneath the Tibetan Plateau Constrained by Sn Propagation Efficiency[J]. LITHOSPHERE,2022,2022(1):13. |
| APA | Jiang, Mengfan,Sun, Weijia,Hu, Jiamin,&Tang, Qingya.(2022).Lithospheric Structures beneath the Tibetan Plateau Constrained by Sn Propagation Efficiency.LITHOSPHERE,2022(1),13. |
| MLA | Jiang, Mengfan,et al."Lithospheric Structures beneath the Tibetan Plateau Constrained by Sn Propagation Efficiency".LITHOSPHERE 2022.1(2022):13. |
入库方式： OAI收割
来源：地质与地球物理研究所
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