SHEAR WAVE BIREFRINGENCE IN DILATING GRANITE

被引：44

作者：

Bonner, B. P. ^{[1
]}

机构：

[1] Univ Calif Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 1974年 / 1卷 / 05期

关键词：

D O I：

10.1029/GL001i005p00217

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Laboratory observations of ultrasonic shear waves indicate splitting along the direction of minimump rincipal stress of - 11% for confined (20 MPa) and similar to 16% for unconfined specimens of Westerly granite loaded in uniaxial stress. Dilatant strains increase birefringence except at > 80-90% of the ultimate strength, when processes related to shear failure apparently become important. If seismic birefringence observed in the field can be related to anisotropic'dilatants trains, thesel abeasuremoefn ptsre cursovreyl ocity changessh oulpdr oveu sefuiln predictinega earth quakes.

引用

页数：4

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