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dc.contributor.authorRenda, Emiliano-
dc.contributor.authorBaumgartner, Lucas-
dc.contributor.authorPutlitz, Benita-
dc.contributor.authorGonzález, Pablo Diego-
dc.contributor.authorOriolo, Sebastián-
dc.contributor.authorMarcos, Paulo-
dc.date.accessioned2024-05-13T14:17:46Z-
dc.date.available2024-05-13T14:17:46Z-
dc.date.issued2022-10-09-
dc.identifier.urihttp://rid.unrn.edu.ar/handle/20.500.12049/11589-
dc.language.isoenes_ES
dc.relation.urihttps://gsa.confex.com/gsa/2022AM/meetingapp.cgi/Paper/381745es_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/-
dc.titleLate Devonian high-grade metamorphism and migmatisation in Patagonia, Argentinaes_ES
dc.typeObjeto de conferenciaes_ES
dc.rights.licenseCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)-
dc.description.filiationRenda, Emiliano. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro, Argentinaes_ES
dc.description.filiationBaumgartner, Lucas. Institute of Earth Sciences, University of Lausanne, Lausanne, Switzerlandes_ES
dc.description.filiationPutlitz, Benita. Institute of Earth Sciences, University of Lausanne, Lausanne, Switzerlandes_ES
dc.description.filiationGonzález, Pablo Diego. Centro SEGEMAR General Roca. Río Negro; Argentina.es_ES
dc.description.filiationOriolo, Sebastián. IGEBA (UBA-CONICET). Buenos Aires; Argentina.es_ES
dc.description.filiationMarcos, Paulo. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro, Argentinaes_ES
dc.subject.keywordmetamorphismes_ES
dc.subject.keywordmigmatitees_ES
dc.subject.keywordDevonianes_ES
dc.subject.keywordPatagoniaes_ES
dc.subject.keywordU-Pb datinges_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
dc.subject.materiaCiencias Exactas y Naturaleses_ES
dc.origin.lugarDesarrolloUniversidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Río Negro, Argentinaes_ES
dc.description.resumenThe Pacific margin of South America represents an excellent example to study crustal growth, since it was an active margin throughout the Late Neoproterozoic and Phanerozoic times, involving different crustal addition mechanisms . The Paleozoic evolution of southernmost South America is dominated by the accretionary Terra Australis Orogen. Here, Patagonia has been considered as an accreted terrane, exotic to the Gondwanan margin. However, this area remains largely unexplored, and the timing and metamorphic conditions of these crustal blocks potentially involved in the building of Patagonia is not fully understood. Here, we study a Middle-Late Paleozoic basement block located in the central part of Patagonia called Taquetren Range. This block is part of a hundred of kilometers-long orogeny that is thought to represent an accretionary margin. It is built up by medium-to high-grade metamorphic rocks, where migmatites are common as well as both syntectonic and post-tectonic plutonic bodies. Metapelite units are characterized by bt-gt-plg-qz-ilm±sill paragneisses and migmatites. Our new U-Pb zircon data yield a ~360 Ma crystallization age for syntectonic granitoids, which are peraluminous and form part of a migmatised metapelite sequence. Metamorphic ages in U-Th-Pb monazite range from 379-323 Ma . Our data place, thus, the crustal melting process into the Late Devonian, a time of protracted high-grade metamorphism for a wide area of central Patagonia. P-T- determinations using metamorphic assemblage diagrams yield 7.5-8.5 Kb and 710-750°C. The high-grade metamorphic conditions are compatible with the accretion of a previously proposed oceanic-arc and with the closure of an associated back-arc basin. Additional information comes from detrital zircon studies which indicate several important episodes of crustal addition: Meso- to Neoproterozoic, late Cambrian-early Ordovician, Silurian, and late Devonian times.es_ES
dc.relation.journalTitleGeological Society of America Abstracts with Programs-es_ES
dc.type.subtypeResumenes_ES
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