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Localization effect on AMS fabric revealed by microstructural evidence across small-scale shear zone in marble

2019-11-25Journal article Open access
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dc.contributor.authorKusbach, Vladimir
dc.contributor.authorMachek, Matej
dc.contributor.authorRoxerová, Z.
dc.contributor.authorRacek, Martin
dc.contributor.authorSilva, Pedro
dc.date.accessioned2019-12-05T11:13:08Z
dc.date.available2019-12-05T11:13:08Z
dc.date.issued2019-11-25
dc.description.abstractAnisotropy of magnetic susceptibility (AMS) is regularly applied as a tool to infer structural analysis of deformation and flow in rocks, particularly, with low anisotropy. AMS integrates the magnetic signature of crystallographic and shape preferred orientation of all mineral grains present in the rock microstructure. Those preferred orientations result from multiple processes affecting the rock during its evolution, therefore the desirable AMS-strain relationship is not straightforward. Here we show that due to localization of deformation, AMS is indirectly dependent on the magnitude and character of deformation. In order to decipher the AMS-strain relationship, AMS studies should be accompanied by microstructural analyses combined with numerical modelling of magnetic fabric. A small-scale shear zone produced by single deformation event was studied. The resultant AMS fabric is “inverse” due to the presence of Fe-dolomite and controlled by calcite and dolomite crystallographic preferred orientations. The localized deformation resulted in the angular deviation between macroscopic and magnetic fabric in the shear zone, systematically increasing with increasing strain. This is a result of the presence of microstructural subfabrics of coarse porphyroclasts and fine-grained recrystallized matrix produced by localization.The localization of deformation is a multiscale and widespread process that should be considered whenever interpreting AMS in deformed rocks and regions.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationKUSBACH, V. K.; [et al] – Localization effect on AMS fabric revealed by microstructural evidence across small-scale shear zone in marble. Scientific Reports. ISSN 2045-2322. Vol. 9 (2019), pp. 1-14pt_PT
dc.identifier.doihttps://doi.org/10.1038/s41598-019-53794-ypt_PT
dc.identifier.issn2045-2322
dc.identifier.urihttp://hdl.handle.net/10400.21/10792
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherNature Publishing Grouppt_PT
dc.relation.publisherversionhttps://www.nature.com/articles/s41598-019-53794-y.pdfpt_PT
dc.subjectAnisotropy of magnetic susceptibility (AMS)pt_PT
dc.subjectAMS-strain relationshippt_PT
dc.subjectShear zonept_PT
dc.subjectMicrostructural subfabricspt_PT
dc.titleLocalization effect on AMS fabric revealed by microstructural evidence across small-scale shear zone in marblept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage14pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleScientific Reportspt_PT
oaire.citation.volume9pt_PT
person.familyNameKusbach
person.familyNameMachek
person.familyNameRacek
person.familyNameSilva
person.givenNameVladimir
person.givenNameMatěj
person.givenNameMartin
person.givenNamePedro
person.identifier1232178
person.identifier.ciencia-idC314-1157-FD0C
person.identifier.orcid0000-0003-2435-2185
person.identifier.orcid0000-0002-3841-5581
person.identifier.orcid0000-0003-0139-6337
person.identifier.orcid0000-0002-9178-3623
person.identifier.ridD-4892-2012
person.identifier.ridH-6399-2014
person.identifier.ridS-4169-2016
person.identifier.ridB-8512-2008
person.identifier.scopus-author-id24529024400
person.identifier.scopus-author-id23493634400
person.identifier.scopus-author-id55431034700
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication571a66b6-5e65-42a1-9811-63ac0bafa392
relation.isAuthorOfPublication604c042d-563d-4db0-ba35-9ffb83f7cdb5
relation.isAuthorOfPublication75ac1259-b41f-48f3-bbfa-317caac7f64a
relation.isAuthorOfPublication54c96e27-8c3a-42d9-b751-ebc637c2f478
relation.isAuthorOfPublication.latestForDiscovery54c96e27-8c3a-42d9-b751-ebc637c2f478

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