Anisotropic Pn Tomography of Alaska and Adjacent Regions
文献类型：期刊论文
| 作者 | He, Yuhui1,2,3,4; Lu, Yan1,2,3,4 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2021-11-01 |
| 卷号 | 126期号:11页码:11 |
| 关键词 | Alaska Pn velocity anisotropy coordinate rotation |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2021JB022220 |
| 英文摘要 | We 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. |
| WOS关键词 | SEISMIC VELOCITY STRUCTURE ; MANTLE FLOW ; TRANSITION FAULT ; SUBDUCTION ; BENEATH ; SLAB ; INSIGHTS ; ZONE ; WESTERN ; MA |
| 资助项目 | National 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] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000723102600051 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | 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 ; 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 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/103897]  |
| 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 | Lu, Yan |
| 作者单位 | 1.Chinese Acad Sci, Mohe Observ Geophys, Inst Geol & Geophys, Beijing, Peoples R China 2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Key Lab Earth & Planetary Phys, Inst Geol & Geophys, Beijing, Peoples R China 4.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。