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Seismic anisotropy in the upper mantle
Tectonophysics, 1968Abstract From the study of ultramafic rocks it is clear that there is a strong tendency toward olivine orientation in which the b crystallographic axes show a distinct concentration normal to a schistosity or banding. Olivine a and c axes tend to lie in a girdle normal to this b axis concentration. Laboratory measurements of the elasticity of
N.I. Christensen, R.S. Crosson
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Observations of seismic anisotropy in prestack seismic data
SEG Technical Program Expanded Abstracts 2007, 2007A method for displaying prestack seismic data that highlights azimuthal anisotropy is shown. Using this method to make observations of azimuthal anisotropy in prestack seismic data makes it clear that azimuthal anisotropy is observed in all types of seismic data and that it is widespread from the shallowest to the deepest seismic reflectors. Therefore,
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2002
This chapter focuses on seismological aspects of seismic anisotropy. It presents results that link the observations of seismic anisotropy to dynamic processes acting in the Earth. Evidence for seismic anisotropy come either from local variation of seismic velocities with respect to the direction of propagation, or from anomalies linked with their ...
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This chapter focuses on seismological aspects of seismic anisotropy. It presents results that link the observations of seismic anisotropy to dynamic processes acting in the Earth. Evidence for seismic anisotropy come either from local variation of seismic velocities with respect to the direction of propagation, or from anomalies linked with their ...
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A case of anisotropy of seismic velocity
Geoexploration, 1964Abstract The anisotropy of the seismic velocity at a metamorphic shale was determined by measurements underground in the Langsele mine in the Skelleftea ore district (Sweden). In this paper the results are discussed and compared with a model consisting of a stratified medium with two alternating layers.
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Stochastic representation of seismic anisotropy
2018Jordan?s (2015) self-consistent, second-order Born theory is applied to compute the effective stiffness tensor for spatially stationary stochastic models of 3-D elastic heterogeneity. The effects of local anisotropy can be separated from spatially extended geometric anisotropy by factoring the covariance of the moduli into a one-point variance tensor ...
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Seismic Anisotropy Tomography and Mantle Dynamics
Surveys in Geophysics, 2023Zewei Wang, Dapeng Zhao, Wang Zewei
exaly
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1996
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