Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/11130
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dc.date.accessioned2018-03-12T10:58:08Zen
dc.date.available2018-03-12T10:58:08Zen
dc.date.issued2017-10-16en
dc.identifier.urihttp://hdl.handle.net/2122/11130en
dc.description.abstractWe present an example of interaction between magmatism and tectonics at shallow crustal levels. In the Late Miocene the metamorphic units of the eastern Elba Island (northern Apennines) were intruded at very shallow crustal levels by a large pluton (> 60 km2) with the development of an hectometre-sized contact aureole defined by growth of low-pressure/high-temperature mineral assemblages (Pmax < 0.2 GPa, Tmax ~ 650 °C). Structural data show that the contact aureole is associated with a km-sized antiform of the foliation and by several metreto decametre-thick high-strain domains consisting of strongly foliated rocks containing synkinematic HT/LP mineral assemblages and ductile shear zones of variable thickness. These shear zones are characterized by a mylonitic foliation variably overprinted by cataclasis. Quartz microfabrics indicate that the dynamic crystallization processes progressively changed from grain boundary migration, associated with the thermal peak of contact metamorphism, to subgrain rotation and bulging recrystallization, the latter mostly associated with the cataclastic overprint. These transitions of recrystallization mechanisms in quartz are related to a progressive decrease of temperature during deformation. Deformation accompanied the development and cooling of the contact aureole, which recorded the switch from high temperature ductile to low temperature brittle conditions. The geometry of the studied deformation structures is consistent with the constraints of the regional tectonic evolution and its local interaction with the localized and transient thermal anomaly related to the coeval emplacement of igneous rocks.en
dc.language.isoEnglishen
dc.relation.ispartofTectonophysicsen
dc.relation.ispartofseries/717 (2017)en
dc.subjectUpper crust Contact aureole Heterogeneous deformation Ductile-brittle shear zones Quartz microfabric Elba Islanden
dc.titleHeterogeneous brittle-ductile deformation at shallow crustal levels under high thermal conditions: The case of a synkinematic contact aureole in the inner northern Apennines, southeastern Elba Island, Italyen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber547–564en
dc.identifier.URLhttps://www.sciencedirect.com/science/article/pii/S0040195117303384?via%3Dihuben
dc.subject.INGVBrittle ductile transition in upper crustal thermal aureoleen
dc.identifier.doi10.1016/j.tecto.2017.08.020en
dc.description.obiettivoSpecifico7T. Struttura della Terra e geodinamicaen
dc.description.journalTypeJCR Journalen
dc.contributor.authorPapeschi, Samueleen
dc.contributor.authorMusumeci, Giovannien
dc.contributor.authorMazzarini, Francescoen
dc.contributor.departmentDipartimento di Scienze della Terra, Firenze University, Firenze, Italyen
dc.contributor.departmentDipartimento di Scienze della Terra, Pisa University, Pisa, Italyen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptDipartimento di Scienze della Terra, Firenze University, Firenze, Italy-
crisitem.author.deptUniversità di Pisa-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia-
crisitem.author.orcid0000-0002-5774-7119-
crisitem.author.orcid0000-0001-5343-4708-
crisitem.author.orcid0000-0002-3864-6558-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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