DOI: 10.1002/2014GL060490
论文题名: A novel EBSD-based finite-element wave propagation model for investigating seismic anisotropy: Application to Finero Peridotite, Ivrea-Verbano Zone, Northern Italy
作者: Zhong X. ; Frehner M. ; Kunze K. ; Zappone A.
刊名: Geophysical Research Letters
ISSN: 0094-9689
EISSN: 1944-9420
出版年: 2014
卷: 41, 期: 20 起始页码: 7105
结束页码: 7114
语种: 英语
英文关键词: EBSD-based numerical simulation
; Finero peridotite
; finite-element modeling
; fracture
; seismic anisotropy
Scopus关键词: Anisotropy
; Crack propagation
; Crystallography
; Fracture
; Numerical models
; Seismic waves
; Seismology
; Wave propagation
; Crystallographic preferred orientations
; Electron back scatter diffraction
; Finero peridotite
; Laboratory measurements
; Seismic anisotropy
; Shape preferred orientations
; Wave propagation modeling
; Wave propagation simulation
; Finite element method
; crystallography
; finite element method
; numerical model
; peridotite
; seismic anisotropy
; seismic wave
; velocity
; wave propagation
; Italy
; Ivrea-Verbano Zone
英文摘要: A novel electron backscatter diffraction (EBSD) -based finite-element (FE) wave propagation simulation is presented and applied to investigate seismic anisotropy of peridotite samples. The FE model simulates the dynamic propagation of seismic waves along any chosen direction through representative 2D EBSD sections. The numerical model allows separation of the effects of crystallographic preferred orientation (CPO) and shape preferred orientation (SPO). The obtained seismic velocities with respect to specimen orientation are compared with Voigt-Reuss-Hill estimates and with laboratory measurements. The results of these three independent methods testify that CPO is the dominant factor controlling seismic anisotropy. Fracture fillings and minor minerals like hornblende only influence the seismic anisotropy if their volume proportion is sufficiently large (up to 23%). The SPO influence is minor compared to the other factors. The presented FE model is discussed with regard to its potential in simulating seismic wave propagation using EBSD data representing natural rock petrofabrics. Key Points Our combined approach allows separating different causes for seismic anisotropySeismic anisotropy is dominated by crystallographic preferred orientationThe novel EBSD-based FE simulation has several advantages discussed in the paper ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911390483&doi=10.1002%2f2014GL060490&partnerID=40&md5=7569860c6643522103abb5d181e664a5
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6953
Appears in Collections: 气候减缓与适应
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作者单位: Geological Institute, ETH Zurich, Switzerland
Recommended Citation:
Zhong X.,Frehner M.,Kunze K.,et al. A novel EBSD-based finite-element wave propagation model for investigating seismic anisotropy: Application to Finero Peridotite, Ivrea-Verbano Zone, Northern Italy[J]. Geophysical Research Letters,2014-01-01,41(20).