DOI: 10.1002/grl.50315
论文题名: Seismic anisotropy in eastern Africa, mantle flow, and the African superplume
作者: Bagley B. ; Nyblade A.A.
刊名: Geophysical Research Letters
ISSN: 0094-9149
EISSN: 1944-8880
出版年: 2013
卷: 40, 期: 8 起始页码: 1500
结束页码: 1505
语种: 英语
英文关键词: african superplume
; anisotropy
; shear wave splitting
Scopus关键词: Absolute plate motions
; Archean lithosphere
; Continental break-up
; Polarization direction
; Seismic anisotropy
; Shear wave splitting
; Superplume
; Tectonic deformations
; Anisotropy
; Deformation
; Polarization
; Tectonics
; Tomography
; Shear waves
; Archean
; craton
; deformation
; estimation method
; lithosphere
; mantle
; rift zone
; S-wave
; seismic anisotropy
; tectonic phenomena
; East Africa
; Tanzania
英文摘要: New estimates of seismic anisotropy from shear wave splitting measurements in eastern Africa reveal a pattern of seismic anisotropy dominated by a NE alignment of fast polarization directions with local changes around the thick Archean lithosphere of the Tanzania craton. The overall pattern is consistent with mantle flow from the African superplume but not with absolute plate motion, a plume head, or fossil anisotropy in the lithosphere. In combination with tomographic images of the African superplume, this finding suggests that plateau uplift, volcanism, and continental breakup along the Afro-Arabian rift system is strongly influenced by flow from the lower mantle and indicates a connection between lower mantle processes and the tectonic deformation of the Earth's surface. Key Points The African superplume can explain all of the fast polarization directions Results indicate a connection between the lower mantle and tectonic deformation. ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84877990042&doi=10.1002%2fgrl.50315&partnerID=40&md5=3fc11f12ec5e7cb5acc76be8cdd97d99
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6413
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Geosciences, Pennsylvania State University, University Park PA, United States
Recommended Citation:
Bagley B.,Nyblade A.A.. Seismic anisotropy in eastern Africa, mantle flow, and the African superplume[J]. Geophysical Research Letters,2013-01-01,40(8).