DOI: 10.1002/2014GL059536
论文题名: Seismic anisotropy and subduction-induced mantle fabrics beneath the Arabian and Nubian Plates adjacent to the Red Sea
作者: Elsheikh A.A. ; Gao S.S. ; Liu K.H. ; Mohamed A.A. ; Yu Y. ; Fat-Helbary R.E.
刊名: Geophysical Research Letters
ISSN: 0094-10166
EISSN: 1944-9897
出版年: 2014
卷: 41, 期: 7 起始页码: 2376
结束页码: 2381
语种: 英语
英文关键词: Egypt
; mantle flow
; Red Sea
; Saudi Arabia
; seismic anisotropy
; shear-wave splitting
Scopus关键词: Anisotropy
; Egypt
; Mantle flow
; Red sea
; Saudi Arabia
; Seismic anisotropy
; Shear wave splitting
; Shear waves
; asthenosphere
; joint
; mantle plume
; S-wave
; seismic anisotropy
; subduction
; Egypt
; Red Sea [(GVR) Egypt]
; Saudi Arabia
英文摘要: For most continental areas, the mechanisms leading to mantle fabrics responsible for the observed anisotropy remain ambiguous, partially due to the lack of sufficient spatial coverage of reliable seismological observations. Here we report the first joint analysis of shear-wave splitting measurements obtained at stations on the Arabian and Nubian Plates adjacent to the Red Sea. More than 1100 pairs of high-quality splitting parameters show dominantly N-S fast orientations at all 47 stations and larger-than-normal splitting times beneath the Afro-Arabian Dome (AAD) the uniformly N-S fast orientations and large splitting times up to 1.5 s are inconsistent with significant contributions from the lithosphere, which is about 50-80 km thick beneath the AAD and even thinner beneath the Red Sea the results can best be explained by simple shear between the lithosphere and the asthenosphere associated with northward subduction of the African/Arabian Plates over the past 150 Ma. Key Points Uniform N-S fast orientations on both sides of the Red Sea The results are inconsistent with plume or fossil fabric models Anisotropy may originate from upper asthenosphere due to long-term subduction © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84899043440&doi=10.1002%2f2014GL059536&partnerID=40&md5=683791bac87cb0a7ed7e10226259823b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7430
Appears in Collections: 气候减缓与适应
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作者单位: Missouri University of Science and Technology, Rolla, MO, United States
Recommended Citation:
Elsheikh A.A.,Gao S.S.,Liu K.H.,et al. Seismic anisotropy and subduction-induced mantle fabrics beneath the Arabian and Nubian Plates adjacent to the Red Sea[J]. Geophysical Research Letters,2014-01-01,41(7).