DOI: 10.1002/2014GL059875
论文题名: Lowermost mantle anisotropy and deformation along the boundary of the African LLSVP
作者: Lynner C. ; Long M.D.
刊名: Geophysical Research Letters
ISSN: 0094-10064
EISSN: 1944-9795
出版年: 2014
卷: 41, 期: 10 起始页码: 3447
结束页码: 3454
语种: 英语
英文关键词: African LLSVP
; discrepant SKS-SKKS splitting
; lowermost mantle anisotropy
Scopus关键词: Earth sciences
; Geophysics
; African LLSVP
; discrepant SKS-SKKS splitting
; Lowermost mantle
; Seismic station
; Shear velocities
; Shear wave splitting
; Splitting measurements
; Upper mantle anisotropy
; Anisotropy
; body wave
; deformation
; lower mantle
; mantle structure
; S-wave
; seismic anisotropy
; wave splitting
; Africa
英文摘要: Shear wave splitting of SK(K)S phases is often used to examine upper mantle anisotropy. In specific cases, however, splitting of these phases may reflect anisotropy in the lowermost mantle. Here we present SKS and SKKS splitting measurements for 233 event-station pairs at 34 seismic stations that sample D″ beneath Africa. Of these, 36 pairs show significantly different splitting between the two phases, which likely reflects a contribution from lowermost mantle anisotropy. The vast majority of discrepant pairs sample the boundary of the African large low shear velocity province (LLSVP), which dominates the lower mantle structure beneath this region. In general, we observe little or no splitting of phases that have passed through the LLSVP itself and significant splitting for phases that have sampled the boundary of the LLSVP. We infer that the D″ region just outside the LLSVP boundary is strongly deformed, while its interior remains undeformed (or weakly deformed). © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901161343&doi=10.1002%2f2014GL059875&partnerID=40&md5=48a520e001078f10eb7b51e5f27d83a9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7328
Appears in Collections: 气候减缓与适应
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作者单位: Yale University, New Haven, CT, United States
Recommended Citation:
Lynner C.,Long M.D.. Lowermost mantle anisotropy and deformation along the boundary of the African LLSVP[J]. Geophysical Research Letters,2014-01-01,41(10).