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Focal mechanisms produced by shear faulting in weakly transversely isotropic crustal rocks
Vaclav Vavrycuk
Focal mechanisms produced by shear faulting in weakly transversely isotropic crustal rocks
Geophysics (September 2006) 71 (5): D145-D151
Focal mechanisms produced by shear faulting in weakly transversely isotropic crustal rocks
Geophysics (September 2006) 71 (5): D145-D151
Index Terms/Descriptors
Abstract
Shear faulting in anisotropic rocks produces non-double-couple (non-DC) mechanisms. The non-DC mechanisms can comprise the isotropic (ISO) and compensated linear vector dipole (CLVD) components. The formulas for percentages of the ISO and CLVD are simplified under the assumption of weak transverse isotropy and can be expressed advantageously in terms of Thomsen's anisotropy parameters. Shear faulting in crustal rocks with anisotropy strength of 10% can produce an ISO of up to 10% and a CLVD of up to 30%. Such values are significant and detectable in carefully determined focal mechanisms.
ISSN: 0016-8033
EISSN: 1942-2156
Coden: GPYSA7
Serial Title: Geophysics
Serial Volume: 71
Serial Issue: 5
Title: Focal mechanisms produced by shear faulting in weakly transversely isotropic crustal rocks
Author(s): Vavrycuk, Vaclav
Affiliation: Academy of Sciences of the Czech Republic, Geophysical Institute,
Prague,
Czech Republic
Pages: D145-D151
Published: 200609
Text Language: English
Publisher: Society of Exploration Geophysicists,
Tulsa, OK,
United States
References: 33
DOI:
10.1190/1.2236378
Accession Number: 2007-034970
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 200710
