Show simple item record

dc.contributor.authorMarti, Sina
dc.contributor.authorStunitz, Holger
dc.contributor.authorHeilbronner, Renée
dc.contributor.authorDrury, Martyn
dc.contributor.authorPlümper, Oliver
dc.contributor.authorDrury, Martyn
dc.date.accessioned2018-07-25T12:00:33Z
dc.date.available2018-07-25T12:00:33Z
dc.date.issued2017-11-03
dc.description.abstractRock deformation experiments are performed on fault gouge fabricated from ‘Maryland Diabase’ rock powder to investigate the transition from dominant brittle to dominant viscous behaviour. At the imposed strain rates of γ = 3 • 10⁻⁵ − 3 • 10⁻⁶ s-1 the transition is observed in the temperature range of (600 °C < T < 800 °C) at confining pressures of (0.5 GPa ≤ Pc ≤ 1.5 GPa). The transition thereby takes place by a switch from brittle fracturing and cataclastic flow to viscous dissolution-precipitation creep and grain boundary sliding. Mineral reactions and resulting grain size refinement by nucleation are observed to be critical processes for the switch to viscous deformation, i.e., grain size sensitive creep. In the transitional regime, the mechanical response of the sample is a mixed-mode between brittle and viscous rheology and microstructures associated with both brittle and viscous deformation are observed. As grain size reduction by reaction and nucleation is a time dependent process, the brittle-viscous transition is not only a function of T but to a large extent also of microstructural evolution.en_US
dc.description.sponsorshipSwiss National Foundation grant The Freiwillige Akademische Gesellschaft, Baselen_US
dc.descriptionAccepted manuscript version. Published version available at <a href=https://doi.org/10.1016/j.jsg.2017.10.011> https://doi.org/10.1016/j.jsg.2017.10.011</a>. Accepted manuscript version, licensed <a href=http://creativecommons.org/licenses/by-nc-nd/4.0/> CC BY-NC-ND 4.0.</a>en_US
dc.identifier.citationMarti, S., Stunitz, H., Heilbronner, R., Plümper, O. & Drury, M. 2017). Experimental investigation of the brittle-viscous transition in mafic rocks – Interplay between fracturing, reaction, and viscous deformation. Journal of Structural Geology, 105, 62-79. https://doi.org/10.1016/j.jsg.2017.10.011en_US
dc.identifier.cristinIDFRIDAID 1544540
dc.identifier.doi10.1016/j.jsg.2017.10.011
dc.identifier.issn0191-8141
dc.identifier.issn1873-1201
dc.identifier.urihttps://hdl.handle.net/10037/13264
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalJournal of Structural Geology
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectRock deformation experimentsen_US
dc.subjectBrittle-viscous transitionen_US
dc.subjectDissolution-precipitationen_US
dc.subjectGrain boundary slidingen_US
dc.subjectPolyphase rheologyen_US
dc.titleExperimental investigation of the brittle-viscous transition in mafic rocks – Interplay between fracturing, reaction, and viscous deformationen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


File(s) in this item

Thumbnail

This item appears in the following collection(s)

Show simple item record