DOI: 10.1002/grl.50671
论文题名: Directions of seismic anisotropy in laboratory models of mantle plumes
作者: Druken K.A. ; Kincaid C. ; Griffiths R.W.
刊名: Geophysical Research Letters
ISSN: 0094-8795
EISSN: 1944-8526
出版年: 2013
卷: 40, 期: 14 起始页码: 3544
结束页码: 3549
语种: 英语
英文关键词: mantle plumes
; seismic anisotropy
Scopus关键词: Anisotropy patterns
; Complex relationships
; Fundamental changes
; Geophysical measurements
; Laboratory experiments
; Mantle plume
; Seismic anisotropy
; Tectonic settings
; Silicate minerals
; Tectonics
; Thermal plumes
; Seismology
; geophysical method
; laboratory method
; mantle plume
; measurement method
; numerical model
; plate tectonics
; seismic anisotropy
; seismic data
; seismology
英文摘要: A recent expansion in global seismic anisotropy data provides important new insights about the style of mantle convection. Interpretations of these geophysical measurements rely on complex relationships between mineral physics, seismology, and mantle dynamics. We report on 3-D laboratory experiments using finite strain markers evolving in time-dependent, viscous flow fields to quantify the range in expected anisotropy patterns within buoyant plumes surfacing in a variety of tectonic settings. A surprising result is that laboratory proxies for the olivine fast axis overwhelmingly align tangential to radial outflow in plumes well before reaching the surface. These remarkably robust, and ancient, anisotropy patterns evolve differently in stagnant, translational, and divergent plate tectonic settings and are essentially orthogonal to patterns typically referenced when prospecting for plume signals in seismic data. Results suggest a fundamental change in the mineral physics-seismology-circulation relationship used in accepting or rejecting a plume model. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880210095&doi=10.1002%2fgrl.50671&partnerID=40&md5=5664c1122a57c544fc953268752a040a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6059
Appears in Collections: 气候减缓与适应
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作者单位: Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, DC 20015, United States
Recommended Citation:
Druken K.A.,Kincaid C.,Griffiths R.W.. Directions of seismic anisotropy in laboratory models of mantle plumes[J]. Geophysical Research Letters,2013-01-01,40(14).