Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/14471
DC Field | Value | Language |
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dc.date.accessioned | 2021-02-08T08:55:52Z | - |
dc.date.available | 2021-02-08T08:55:52Z | - |
dc.date.issued | 2020 | - |
dc.identifier.uri | http://hdl.handle.net/2122/14471 | - |
dc.description.abstract | Understanding the physical mechanisms at the origin of slow‐slip events has been proven a very challenging task. In particular, little is known on the role of fault heterogeneity during slow slip. In this study, we provide evidences that fault fabric controls slip velocity time histories during slow‐slip events generated in the laboratory. We performed experiments using a double‐direct biaxial shear apparatus and two different fault gouges, homogeneous quartz powder, and heterogeneous anhydrite/dolomite mixture. We measure details of fault slip to resolve the slip velocity function and volumetric deformation that, coupled with an analysis of the resulting microstructure, allow us to infer the mechanical processes at play. Our results show that slow‐slip events can be generated for both fault gouges when k ~ kc with similar values of breakdown work. The shear fabric exerts a strong influence during the coseismic breakdown stage. In quartz, where most of the slip occurs on a very localized slipping surface, the peak slip velocity is attained near the final stage of friction breakdown and therefore a relevant amount of the mechanical work is absorbed during slip acceleration. In anhydrite/dolomite mixture, the peak slip velocity is suddenly reached after a relatively small drop in friction, accompanied by fault dilation, implying that most of the mechanical work is absorbed during slip deceleration. For anhydrite/dolomite mixture these results are likely related to heterogeneous slip distribution along the observed foliation. Taken together, these observations suggest that the mechanics of slow‐slip events depends on shear zone fabric. | en_US |
dc.description.sponsorship | Sapienza Grant Ateneo 2018 to C. C. and Horizon 2020 innovation program under the Marie Sklodowska‐Curie 656676 FEAT to M. M. S. | en_US |
dc.language.iso | English | en_US |
dc.publisher.name | Wiley Agu | en_US |
dc.relation.ispartof | Journal of Geophysical Research: Solid Earth | en_US |
dc.relation.ispartofseries | /125 (2020) | en_US |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 United States | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/us/ | * |
dc.subject | Earthquake | en_US |
dc.subject | Friction | en_US |
dc.title | The Role of Shear Fabric in Controlling Breakdown Processes During Laboratory Slow‐Slip Events | en_US |
dc.type | article | en |
dc.description.status | Published | en_US |
dc.description.pagenumber | e2020JB020405 | en_US |
dc.subject.INGV | Earthquake physics | en_US |
dc.identifier.doi | 10.1029/2020JB020405 | en_US |
dc.description.obiettivoSpecifico | 1T. Struttura della Terra | en_US |
dc.description.journalType | JCR Journal | en_US |
dc.contributor.author | Scuderi, Marco Maria | - |
dc.contributor.author | Tinti, Elisa | - |
dc.contributor.author | Cocco, Massimo | - |
dc.contributor.author | Collettini, Cristiano | - |
dc.contributor.department | Dipartimento di Scienze della Terra, La Sapienza Università di Roma, Rome, Italy | en_US |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | en_US |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | en_US |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | en_US |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Università Roma La Sapienza | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.dept | Università La Sapienza | - |
crisitem.author.orcid | 0000-0001-5232-0792 | - |
crisitem.author.orcid | 0000-0002-6942-3592 | - |
crisitem.author.orcid | 0000-0001-6798-4225 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
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File | Description | Size | Format | |
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00_ANDO_2020JGR.pdf | 10.01 MB | Adobe PDF | View/Open |
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