DOI: 10.1002/2015GL067329
论文题名: An automatically updated S-wave model of the upper mantle and the depth extent of azimuthal anisotropy
作者: Debayle E. ; Dubuffet F. ; Durand S.
刊名: Geophysical Research Letters
ISSN: 0094-9475
EISSN: 1944-9206
出版年: 2016
卷: 43, 期: 2 起始页码: 674
结束页码: 682
语种: 英语
英文关键词: surface waves
; tomography
; upper mantle
Scopus关键词: Anisotropy
; Silicate minerals
; Surface waves
; Tomography
; Azimuthal anisotropy
; Lateral resolution
; Olivine crystals
; Radial anisotropy
; Theory and modeling
; Transition zones
; Upper mantle
; Waveform modeling
; Shear waves
; azimuth
; depth determination
; modeling
; olivine
; plate motion
; S-wave
; seismic anisotropy
; seismic data
; seismic tomography
; transition zone
; upper mantle
; waveform analysis
英文摘要: We present 3D2015-07Sv, an S wave model of the upper mantle based on the waveform modeling of 1,359,470 Rayleigh waves recorded since 1976. The use of approximate forward theory and modeling allows updating the model with new data on a regular basis. 3D2015-07Sv contains azimuthal anisotropy, achieves a lateral resolution of ∼600 km, and is consistent with other recent models up to degree 60 in the uppermost 200 km and degree 15 in the transition zone. Although radial anisotropy has been found to extend deeper beneath continents than beneath oceans, we find no such difference for azimuthal anisotropy, suggesting that beneath most continents, the alignment of olivine crystal is preferentially horizontal and azimuthally random at large scale. As most continents are located on slow moving plates, this supports the idea that azimuthal anisotropy aligns at large scale with the present plate motion only for plates faster than ∼4 cm yr-1. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956693673&doi=10.1002%2f2015GL067329&partnerID=40&md5=ca3ef854b649d7badbeaaf03b3c025e2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10438
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Laboratoire de Géologie de Lyon: Terre, Planètes, Environnement, CNRS, UMR 5276, École Normale Supérieure de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, Villeurbanne, France
Recommended Citation:
Debayle E.,Dubuffet F.,Durand S.. An automatically updated S-wave model of the upper mantle and the depth extent of azimuthal anisotropy[J]. Geophysical Research Letters,2016-01-01,43(2).