Modeling of fault gouges with Cosserat Continuum Mechanics: Influence of thermal pressurization and chemical decomposition as coseismic weakening mechanisms

Veveakis, E; Sulem, J; Stefanou, I

dc.contributor.author	Veveakis, E	en
dc.contributor.author	Sulem, J	en
dc.contributor.author	Stefanou, I	en
dc.date.accessioned	2014-03-01T02:11:27Z
dc.date.available	2014-03-01T02:11:27Z
dc.date.issued	2012	en
dc.identifier.issn	01918141	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29904
dc.subject	Cosserat Continuum	en
dc.subject	Micro-inertia	en
dc.subject	Reaction kinetics	en
dc.subject	Shear heating	en
dc.subject	Undrained adiabatic shearing	en
dc.subject.other	Adiabatic shearing	en
dc.subject.other	Chemical decomposition	en
dc.subject.other	Cosserat continuum	en
dc.subject.other	Decomposition reaction	en
dc.subject.other	Fault gouge	en
dc.subject.other	Higher order continuum	en
dc.subject.other	Ill posed problem	en
dc.subject.other	Localization of deformation	en
dc.subject.other	Micro-structural	en
dc.subject.other	Microinertia	en
dc.subject.other	Rotational degrees of freedom	en
dc.subject.other	Seismic deformation	en
dc.subject.other	Shear heating	en
dc.subject.other	Simple shear	en
dc.subject.other	Slip rates	en
dc.subject.other	Thermal pressurization	en
dc.subject.other	Ultra-thin	en
dc.subject.other	Continuum mechanics	en
dc.subject.other	Reaction kinetics	en
dc.subject.other	Fault slips	en
dc.subject.other	continuum mechanics	en
dc.subject.other	coseismic process	en
dc.subject.other	decomposition	en
dc.subject.other	deformation	en
dc.subject.other	fault gouge	en
dc.subject.other	microstructure	en
dc.subject.other	modeling	en
dc.subject.other	reaction kinetics	en
dc.subject.other	shear zone	en
dc.title	Modeling of fault gouges with Cosserat Continuum Mechanics: Influence of thermal pressurization and chemical decomposition as coseismic weakening mechanisms	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jsg.2011.09.012	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jsg.2011.09.012	en
heal.publicationDate	2012	en
heal.abstract	In this paper we study the impact of thermal pressurization and mineral decomposition reactions under seismic deformation conditions (e.g., slip rates of about 1 m/s) triggered by shear heating, to the stability of a saturated fault material. By using higher order continuum considerations, allowing for rotational degrees of freedom to the gouge material, we verify that the micro-inertia of the Cosserat Continuum may regularize the ill-posed problem of simple shear of a fault and that the thermal effects promote localization of deformation into ultra-thin shear bands. It is shown that the width of these structures depends on the parameters of the decomposition reaction considered, obtaining values as low as 100 μm, in agreement with microstructural evidence from natural and artificial faults. © 2011 Elsevier Ltd.	en
heal.journalName	Journal of Structural Geology	en
dc.identifier.doi	10.1016/j.jsg.2011.09.012	en
dc.identifier.volume	38	en
dc.identifier.spage	254	en
dc.identifier.epage	264	en