Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7843
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dc.contributor.authorallDoglioni, C.; Università di Roma La Sapienza, Roma, Italyen
dc.contributor.authorallBarba, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallCarminati, E.; Università di Roma La Sapienza, Roma, Italyen
dc.contributor.authorallRiguzzi, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italiaen
dc.date.accessioned2012-02-23T09:19:03Zen
dc.date.available2012-02-23T09:19:03Zen
dc.date.issued2011en
dc.identifier.urihttp://hdl.handle.net/2122/7843en
dc.description.abstractWe model a fault cross-cutting the brittle upper crust and the ductile lower crust. In the brittle layer the fault is assumed to have stick–slip behaviour, whereas the lower ductile crust is inferred to deform in a steady-state shear. Therefore, the brittle–ductile transition (BDT) separates two layers with different strain rates and structural styles. This contrasting behaviour determines a stress gradient at the BDT that is eventually dissipated during the earthquake. During the interseismic period, along a normal fault it should form a dilated hinge at and above the BDT. Conversely, an over-compressed volume should rather develop above a thrust plane at the BDT. On a normal fault the earthquake is associated with the coseismic closure of the dilated fractures generated in the stretched hangingwall during the interseismic period. In addition to the shear stress overcoming the friction of the fault, the brittle fault moves when the weight of the hangingwall exceeds the strength of the dilated band above the BDT. On a thrust fault, the seismic event is instead associated with the sudden dilation of the previously over-compressed volume in the hangingwall above the BDT, a mechanism requiring much more energy because it acts against gravity. In both cases, the deeper the BDT, the larger the involved volume, and the bigger the related magnitude. We tested two scenarios with two examples from L’Aquila 2009 (Italy) and Chi-Chi 1999 (Taiwan) events. GPS data, energy dissipation and strain rate analysis support these contrasting evolutions. Our model also predicts, consistently with data, that the interseismic strain rate is lower along the fault segment more prone to seismic activation.en
dc.language.isoEnglishen
dc.publisher.nameElsevier Science Limiteden
dc.relation.ispartofPhysics of the Earth and Planetary Interiorsen
dc.relation.ispartofseries3-4/184(2011)en
dc.relation.isversionofhttp://hdl.handle.net/2122/6868en
dc.subjectfaul activationen
dc.titleRole of the brittle–ductile transition on fault activationen
dc.typearticleen
dc.description.statusPublisheden
dc.description.pagenumber160-161en
dc.subject.INGV04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamicsen
dc.identifier.doi10.1016/j.pepi.2010.11.005en
dc.description.journalTypeJCR Journalen
dc.description.fulltextopenen
dc.relation.issn0031-9201en
dc.relation.eissn1872-7395en
dc.contributor.authorDoglioni, C.en
dc.contributor.authorBarba, S.en
dc.contributor.authorCarminati, E.en
dc.contributor.authorRiguzzi, F.en
dc.contributor.departmentUniversità di Roma La Sapienza, Roma, Italyen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentUniversità di Roma La Sapienza, Roma, Italyen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione AC, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia-
crisitem.author.orcid0000-0002-8651-6387-
crisitem.author.orcid0000-0001-7965-6667-
crisitem.author.orcid0000-0003-3453-5110-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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