IGGCAS OpenIR  > 岩石圈演化国家重点实验室
Geometry-preserving full-waveform tomography and its application in the Longmen Shan area
Dong, Xingpeng1,2; Yang, Dinghui2; Zhu, Hejun3; Chen, Yun4
2022-03-01
Source PublicationSCIENCE CHINA-EARTH SCIENCES
ISSN1674-7313
Volume65Issue:3Pages:437-448
AbstractClassic 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.
KeywordOptimal transportation Geometry-preserving properties Cycle skipping problem Longmen Shan Lower crustal flow model
DOI10.1007/s11430-021-9849-5
Funding OrganizationNational 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
WOS KeywordFREQUENCY TRAVEL-TIMES ; UPPER-MANTLE ; FINITE-FREQUENCY ; ADJOINT METHODS ; SEISMIC ANISOTROPY ; OPTIMAL TRANSPORT ; SPECTRAL-ELEMENT ; BENEATH EASTERN ; CRUSTAL FLOW ; DEFORMATION
Language英语
Funding ProjectNational Key R&D Program of China[2017YFC1500301] ; National Natural Science Foundation of China[U1839206] ; National Natural Science Foundation of China[42004077]
Funding OrganizationNational 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
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000744796600009
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/104010
Collection岩石圈演化国家重点实验室
Corresponding AuthorYang, Dinghui
Affiliation1.China Earthquake Adm, Inst Geol, Beijing 100029, Peoples R China
2.Tsinghua Univ, Dept Math Sci, Beijing 100084, Peoples R China
3.Univ Texas Dallas, Dept Geosci, Dallas, TX 75080 USA
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
Recommended Citation
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.
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