Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016GL071227 |
Seismic azimuthal anisotropy beneath the eastern United States and its geodynamic implications | |
Yang, Bin B.1; Liu, Yunhua1,2; Dahm, Haider1,3; Liu, Kelly H.1; Gao, Stephen S.1 | |
2017-03-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Peoples R China; Iraq |
英文摘要 | Systematic spatial variations of anisotropic characteristics are revealed beneath the eastern U.S. using seismic data recorded between 1988 and 2016 by 785 stations. The resulting fast polarization orientations of the 5613 measurements are generally subparallel to the absolute plate motion (APM) and are inconsistent with the strike of major tectonic features. This inconsistency, together with the results of depth estimation using the spatial coherency of the splitting parameters, suggests a mostly asthenospheric origin of the observed azimuthal anisotropy. The observations can be explained by a combined effect of APM-induced mantle fabric and a flow system deflected horizontally around the edges of the keel of the North American continent. Beneath the southern and northeastern portions of the study area, the E-W keel-deflected flow enhances APM-induced fabric and produces mostly E-W fast orientations with large splitting times, while beneath the southeastern U.S., anisotropy from the N-S oriented flow is weakened by the APM. |
英文关键词 | seismic anisotropy shear wave splitting mantle flow Appalachian eastern U S asthenosphere |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399762700007 |
WOS关键词 | WAVE SPLITTING MEASUREMENTS ; MANTLE FLOW BENEATH ; NORTH-AMERICA ; SPATIAL COHERENCY ; UNIFORM DATABASE ; SHEAR ; DEFORMATION ; CONSTRAINTS ; TOMOGRAPHY ; PARAMETERS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26919 |
专题 | 气候变化 |
作者单位 | 1.Missouri Univ Sci & Technol, Geol & Geophys Program, Rolla, MO 65409 USA; 2.CNPC Logging Co Ltd, Xian, Peoples R China; 3.Univ Misan, Dept Geog, Amarah, Iraq |
推荐引用方式 GB/T 7714 | Yang, Bin B.,Liu, Yunhua,Dahm, Haider,et al. Seismic azimuthal anisotropy beneath the eastern United States and its geodynamic implications[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(6). |
APA | Yang, Bin B.,Liu, Yunhua,Dahm, Haider,Liu, Kelly H.,&Gao, Stephen S..(2017).Seismic azimuthal anisotropy beneath the eastern United States and its geodynamic implications.GEOPHYSICAL RESEARCH LETTERS,44(6). |
MLA | Yang, Bin B.,et al."Seismic azimuthal anisotropy beneath the eastern United States and its geodynamic implications".GEOPHYSICAL RESEARCH LETTERS 44.6(2017). |
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