Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL087398 |
The Deformational Journey of the Nazca Slab From Seismic Anisotropy | |
Agrawal, Shubham1; Eakin, Caroline M.1; Portner, Daniel E.2,3; Rodriguez, Emily E.2; Beck, Susan L.2 | |
2020-05-07 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; USA |
英文摘要 | The Andean subduction zone is an excellent place to study deformation within a subducting slab as a function of depth, owing to the varying and well-resolved geometry of the subducting Nazca slab beneath South America. Here we combine the results of source-side shear wave splitting with the latest regional tomography model to isolate intraslab raypaths and determine the spatial distribution of anisotropy within the Nazca slab. We observe that in the upper mantle, the intraslab anisotropy appears strongest where the slab is most contorted, suggesting a strong link between anisotropy and subduction-related slab deformation. We identify a second source of anisotropy (delta t similar to 1 s) within the subducting slab at lower mantle depths (660-800 km). The surrounding mantle and transition zone appear largely isotropic, with deep anisotropy concentrated within the slab as it deforms while entering the higher-viscosity lower mantle. |
英文关键词 | Nazca slab seismic anisotropy source side splitting slab anisotropy slab deformation |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000543387400034 |
WOS关键词 | CRYSTALLOGRAPHIC PREFERRED ORIENTATION ; UPPER-MANTLE ; SUBDUCTION ZONES ; FLOW BENEATH ; PLATE ; EVOLUTION ; MECHANISM ; HYDRATION ; DYNAMICS ; INSIGHTS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
URL | 查看原文 |
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/249184 |
专题 | 气候变化 |
作者单位 | 1.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia; 2.Univ Arizona, Dept Geosci, Tucson, AZ USA; 3.Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC USA |
推荐引用方式 GB/T 7714 | Agrawal, Shubham,Eakin, Caroline M.,Portner, Daniel E.,et al. The Deformational Journey of the Nazca Slab From Seismic Anisotropy[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(11). |
APA | Agrawal, Shubham,Eakin, Caroline M.,Portner, Daniel E.,Rodriguez, Emily E.,&Beck, Susan L..(2020).The Deformational Journey of the Nazca Slab From Seismic Anisotropy.GEOPHYSICAL RESEARCH LETTERS,47(11). |
MLA | Agrawal, Shubham,et al."The Deformational Journey of the Nazca Slab From Seismic Anisotropy".GEOPHYSICAL RESEARCH LETTERS 47.11(2020). |
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