RHEOLOGICAL PROPERTIES OF ROCK INFERRED FROM THE GEOMETRY AND MICROSTRUCTURES IN 2 NATURAL SHEAR ZONES

Authors
LAMOUROUX C DEBAT P INGLES J GUERRERO N SIRIEYS P SOULA JC
Citation
C. Lamouroux et al., RHEOLOGICAL PROPERTIES OF ROCK INFERRED FROM THE GEOMETRY AND MICROSTRUCTURES IN 2 NATURAL SHEAR ZONES, Mechanics of materials, 18(2), 1994, pp. 79-87
Citations number
16
Categorie Soggetti
Mechanics,"Material Science
Journal title
Mechanics of materials → ACNP
ISSN journal
01676636
Volume
18
Issue
2
Year of publication
1994
Pages
79 - 87
Database
ISI
SICI code
0167-6636(1994)18:2<79:RPORIF>2.0.ZU;2-P
Abstract
We describe the geometric and kinematic characteristics of natural iso lated shear zones developed in two different rock-types (granodiorite arid limestone) under the same low temperature conditions. Profiles of shear strain (gamma) across the shear zones have a gaussian or trapez oidal shape. From these shapes, we infer rheological changes during th e progressive strain, with strain softening in the limestone (a monomi neralic rock) and strain hardening in the granodiorite (a polyminerali c rock).