V Babuska

(Author)

Seismic Anisotropy in the Earth (1991)Hardcover - 1991, 31 July 1991

Seismic Anisotropy in the Earth (1991)
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Part of Series
Modern Approaches in Geophysics
Part of Series
European Consortium for Mathematics in Industry
Print Length
219 pages
Language
English
Publisher
Springer
Date Published
31 Jul 1991
ISBN-10
0792313216
ISBN-13
9780792313212

Description

Structural geologists are well aware of the fact that isotropic rocks are quite exceptional in nature. Whicheverorigin, sedimentary, metamorphicormagmatic, rocks are shaped with a plane of mineral flattening, the foliation in geologists' jargon, and with a line ofmineral elongation, the lineation. Just like a good quarryman, a trained structural geologistwill detectapreferredorientationin an apparently isotropic granite. Preferred mineral orientation and thus structural anisotropy are the rule in nature. Consideringthe largevariationsinelasticcoefficientsofrock-forming minerals, itcould be predicted that, in turn, seismic anisotropy should exist and be important, provided thatdomains withasimilarstructural signatureare largeenough to affectseismic waves. This is why, in 1982 at a conference held in Frankfurt, which was oneofthe fIrst meetings devoted to the subject of seismic anisotropy, I asked Don Anderson the question of why seismologists had not considered earlier in their models the obvious constraint of anisotropy. I still remember Don's answer: "Adolphe, we knew that our isotropic models were not very good but we had no other choice. It is simply that, so far, computerswere not largeenough tointegrate the anisotropy parameter". Changingisotropic glassesfor anisotropic ones permits us to obtain betterand more realistic seismic modelsofthe Earth's interior, but, maybe more importantly, it has, for a seismologist, the farreaching consequenceofsteppinginto the fIeld ofgeodynamics.

Product Details

Authors:
V BabuskaM Cara
Book Edition:
1991
Book Format:
Hardcover
Country of Origin:
US
Date Published:
31 July 1991
Dimensions:
23.06 x 17.63 x 1.88 cm
ISBN-10:
0792313216
ISBN-13:
9780792313212
Language:
English
Location:
Dordrecht
Pages:
219
Publisher:
Weight:
471.74 gm

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