Seismic Anisotropy in the Earth (Paperback, Softcover reprint of the original 1st ed. 1991)

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.

General

Imprint:	Springer
Country of origin:	Netherlands
Series:	Modern Approaches in Geophysics, 10
Release date:	November 2012
First published:	1991
Authors:	V. Babuska • M. Cara
Dimensions:	235 x 155 x 19mm (L x W x T)
Format:	Paperback
Pages:	219
Edition:	Softcover reprint of the original 1st ed. 1991
ISBN-13:	978-9401055963
Categories:	Books > Science & Mathematics > Physics > Applied physics & special topics > Geophysics Books > Earth & environment > Earth sciences > Geology & the lithosphere > Economic geology > General
LSN:	9401055963
Barcode:	9789401055963

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