DOI: 10.1002/2014GL062862
论文题名: Is inner core seismic anisotropy a marker for plastic flow of cubic iron?
作者: Lincot A. ; Merkel S. ; Cardin P.
刊名: Geophysical Research Letters
ISSN: 0094-8897
EISSN: 1944-8628
出版年: 2015
卷: 42, 期: 5 起始页码: 1326
结束页码: 1333
语种: 英语
英文关键词: cubic iron
; inner core anisotropy
; inner core deformation
Scopus关键词: Coremaking
; Iron alloys
; Plastic deformation
; Seismic prospecting
; Seismology
; Anisotropic structure
; Body-centered cubic
; Elastic anisotropy
; Face-centered cubic
; Inner core
; Monte Carlo approach
; Seismic anisotropy
; Seismic observation
; Anisotropy
; alloy
; inner core
; iron
; seismic anisotropy
英文摘要: This paper investigates whether observations of seismic anisotropy are compatible with a cubic structure of the inner core Fe alloy. We assume that anisotropy is the result of plastic deformation within a large-scale flow induced by preferred growth at the inner core equator. Based on elastic moduli from the literature, body-centered cubic or face-centered cubic Fe produces seismic anisotropy well below seismic observations (<0.4%). A Monte Carlo approach allows us to generalize this result to any form of elastic anisotropy in a cubic system. Within our model, inner core global anisotropy is not compatible with a cubic structure of Fe alloy. Hence, if the inner core material is indeed cubic, large-scale coherent anisotropic structures, incompatible with plastic deformation induced by large-scale flow, must be present. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925880838&doi=10.1002%2f2014GL062862&partnerID=40&md5=edc903899c824b60f8f5fd9dc46e8716
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8513
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Institut des Sciences de la Terre (ISTerre), Université de Grenoble Alpes, CNRS, Grenoble, France
Recommended Citation:
Lincot A.,Merkel S.,Cardin P.. Is inner core seismic anisotropy a marker for plastic flow of cubic iron?[J]. Geophysical Research Letters,2015-01-01,42(5).