IGGCAS OpenIR  > 地球与行星物理院重点实验室
Anisotropic Pn Tomography of Alaska and Adjacent Regions
He, Yuhui1,2,3,4; Lu, Yan1,2,3,4
2021-11-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
ISSN2169-9313
Volume126Issue:11Pages:11
AbstractWe use Pn tomography with coordinate rotation to image in Alaska and adjacent areas and obtain a new Pn velocity and anisotropy model. The observed Pn velocities correlate well with the local geological structures. Low Pn velocities are observed beneath the Aleutian volcanic arc, which may reveal partial melting related to plate dehydration. However, it is separated by a distinct high-velocity anomaly, suggesting a slab tear. The slightly low Pn velocities beneath the Denali volcanic gap suggest that a small amount of magma is produced but is insufficient to form surface volcanoes. We observe sharp bending of the fast directions on the two sides of the northeast edge of the Yakutat Plate, which reveals the plate's bending. Large-scale low velocities are observed beneath the northwestern Cordillera, which may be due to the upwelling of hot material from the deep mantle. The Pn fast directions are parallel to the Queen Charlotte-Fairweather fault system, consistent with the shear strain direction of the faults, reflecting that the influence of the plate boundary is far-reaching and that the deformation of the crust and the upper mantle is coupled. Our study provides new constraints on the complex deformation beneath Alaska and adjacent areas.
KeywordAlaska Pn velocity anisotropy coordinate rotation
DOI10.1029/2021JB022220
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS
WOS KeywordSEISMIC VELOCITY STRUCTURE ; MANTLE FLOW ; TRANSITION FAULT ; SUBDUCTION ; BENEATH ; SLAB ; INSIGHTS ; ZONE ; WESTERN ; MA
Language英语
Funding ProjectNational Natural Science Foundation of China[41874066] ; National Natural Science Foundation of China[41674066] ; Key Research Program of the Institute of Geology & Geophysics, CAS[IGGCAS-201904]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000723102600051
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/103897
Collection地球与行星物理院重点实验室
Corresponding AuthorLu, Yan
Affiliation1.Chinese Acad Sci, Key Lab Earth & Planetary Phys, Inst Geol & Geophys, Beijing, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Mohe Observ Geophys, Inst Geol & Geophys, Beijing, Peoples R China
Recommended Citation
GB/T 7714
He, Yuhui,Lu, Yan. Anisotropic Pn Tomography of Alaska and Adjacent Regions[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2021,126(11):11.
APA He, Yuhui,&Lu, Yan.(2021).Anisotropic Pn Tomography of Alaska and Adjacent Regions.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,126(11),11.
MLA He, Yuhui,et al."Anisotropic Pn Tomography of Alaska and Adjacent Regions".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 126.11(2021):11.
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