Geometry-preserving full-waveform tomography and its application in the Longmen Shan area
文献类型：期刊论文
| 作者 | Dong, Xingpeng3,4; Yang, Dinghui3; Zhu, Hejun1; Chen, Yun2 |
| 刊名 | SCIENCE CHINA-EARTH SCIENCES
 |
| 出版日期 | 2022-03-01 |
| 卷号 | 65期号:3页码:437-448 |
| 关键词 | Optimal transportation Geometry-preserving properties Cycle skipping problem Longmen Shan Lower crustal flow model |
| ISSN号 | 1674-7313 |
| DOI | 10.1007/s11430-021-9849-5 |
| 英文摘要 | Classic L2-norm-based waveform tomography is often plagued by insurmountable cycle skipping problems; as a result, the iterative inversion falls into local minima, yielding erroneous images. According to the optimal transportation theory, we adopt a novel geometry-preserving misfit function based on the quadratic Wasserstein metric (W2-norm), which improves the stability and convexity of the inverse problem. Numerical experiments illustrate that W2-norm-based full-waveform tomography has a larger convergence radius and a faster convergence rate than the L2-norm and can effectively mitigate cycle skipping issues. We apply this method to the Longmen Shan area and obtain a reliable lithospheric velocity model. Our tomographic results indicate that the crystalline crust underlying the Sichuan Basin wedges into the crustal interior of the Tibetan Plateau, and the mid-lower crust of the eastern Tibetan Plateau is characterized by low shear-wave velocities, indicating that ductile crustal flow and strong interactions between terranes jointly dominate the uplift behavior of the Longmen Shan. Furthermore, we find that large earthquakes (e.g., the Wenchuan and Lushan events) occur not only at the junction between high- and low-velocity regions but also in the transition zone from positive to negative radial anisotropy. These findings improve our understanding of the mechanism responsible for large earthquakes in this region. |
| WOS关键词 | FREQUENCY TRAVEL-TIMES ; UPPER-MANTLE ; FINITE-FREQUENCY ; ADJOINT METHODS ; SEISMIC ANISOTROPY ; OPTIMAL TRANSPORT ; SPECTRAL-ELEMENT ; BENEATH EASTERN ; CRUSTAL FLOW ; DEFORMATION |
| 资助项目 | National Key R&D Program of China[2017YFC1500301] ; National Natural Science Foundation of China[U1839206] ; National Natural Science Foundation of China[42004077] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000744796600009 |
| 出版者 | SCIENCE PRESS |
| 资助机构 | National Key R&D Program of China ; National Key R&D Program 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 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 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 Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/104010]  |
| 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 | Yang, Dinghui |
| 作者单位 | 1.Univ Texas Dallas, Dept Geosci, Dallas, TX 75080 USA 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.Tsinghua Univ, Dept Math Sci, Beijing 100084, Peoples R China 4.China Earthquake Adm, Inst Geol, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dong, Xingpeng,Yang, Dinghui,Zhu, Hejun,et al. Geometry-preserving full-waveform tomography and its application in the Longmen Shan area[J]. SCIENCE CHINA-EARTH SCIENCES,2022,65(3):437-448. |
| APA | Dong, Xingpeng,Yang, Dinghui,Zhu, Hejun,&Chen, Yun.(2022).Geometry-preserving full-waveform tomography and its application in the Longmen Shan area.SCIENCE CHINA-EARTH SCIENCES,65(3),437-448. |
| MLA | Dong, Xingpeng,et al."Geometry-preserving full-waveform tomography and its application in the Longmen Shan area".SCIENCE CHINA-EARTH SCIENCES 65.3(2022):437-448. |
入库方式： OAI收割
来源：地质与地球物理研究所
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