DOI: 10.1002/grl.50694
论文题名: Mantle transition zone thinning beneath eastern Africa: Evidence for a whole-mantle superplume structure
作者: Mulibo G.D. ; Nyblade A.A.
刊名: Geophysical Research Letters
ISSN: 0094-8761
EISSN: 1944-8492
出版年: 2013
卷: 40, 期: 14 起始页码: 3562
结束页码: 3566
语种: 英语
英文关键词: eastern Africa
; mantle transition zone
; superplume
; thermal anomaly
; whole-mantle structure
Scopus关键词: Core-mantle boundary
; Eastern Africa
; Mantle transition zone
; Receiver functions
; Seismic tomography
; Superplume
; Thermal anomalies
; Thermal structure
; Earth sciences
; Geophysics
; Structural geology
; core-mantle boundary
; mantle plume
; thermal structure
; tomography
; transition zone
; Africa
英文摘要: P to S conversions from the 410 and 660 km discontinuities observed in receiver function stacks reveal a mantle transition zone that is ~30-40 km thinner than the global average in a region ~200-400 km wide extending in a SW-NE direction from central Zambia, across Tanzania and into Kenya. The thinning of the transition zone indicates a ~190-300 K thermal anomaly in the same location where seismic tomography models suggest that the lower mantle African superplume structure connects to thermally perturbed upper mantle beneath eastern Africa. This finding provides compelling evidence for the existence of a continuous thermal structure extending from the core-mantle boundary to the surface associated with the African superplume. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880216242&doi=10.1002%2fgrl.50694&partnerID=40&md5=0740b8ca14c5228a8425da9e53556980
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6025
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geosciences, Pennsylvania State University, 402 Deike Bldg., University Park, PA 16802, United States
Recommended Citation:
Mulibo G.D.,Nyblade A.A.. Mantle transition zone thinning beneath eastern Africa: Evidence for a whole-mantle superplume structure[J]. Geophysical Research Letters,2013-01-01,40(14).