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dc.contributor.authorOriolo, Sebastián-
dc.contributor.authorSchulz, Bernhard-
dc.contributor.authorGeuna, Silvana-
dc.contributor.authorGonzález, Pablo Diego-
dc.contributor.authorOtamendi, Juan Enrique-
dc.contributor.authorSláma, Sirí-
dc.contributor.authorDruguet, Elena-
dc.contributor.authorSiegesmund, Siegfred-
dc.date.accessioned2020-12-18T14:01:39Z-
dc.date.available2020-12-18T14:01:39Z-
dc.date.issued2020-08-05-
dc.identifier.citationOriolo, S., Schulz, B., Geuna, S., González, P.D., Otamendi, J., Sláma, J., Druguet, E., Siegesmund, S. (2021). Early Paleozoic accretionary orogens along the Western Gondwana margin. Geoscience Frontiers; 12 (1); 109-130.es_ES
dc.identifier.issn1674-9871es_ES
dc.identifier.otherhttps://www.sciencedirect.com/science/article/pii/S1674987120301493?via%3Dihubes_ES
dc.identifier.urihttp://rid.unrn.edu.ar/handle/20.500.12049/6617-
dc.description.abstractEarly Paleozoic accretionary orogens dominated the Western Gondwana margin and were characterized by nearly continuous subduction associated with crustal extension and back-arc basin development. The southwestern margin is represented by Famatinian and Pampean basement realms exposed in South America, both related to the protracted Paleozoic evolution of the Terra Australis Orogen, whereas the northwestern margin is mainly recorded in Cadomian domains of Europe and adjacent regions. However, no clear relationships between these regions were so far established. Based on a compilation and reevaluation of geological, paleomagnetic, petrological, geochronological and isotopic evidence, this contribution focuses on crustal-scale tectonic and geodynamic processes occurring in Western Gondwana accretionary orogens, aiming at disentangling their common Early Paleozoic evolution. Data show that accretionary orogens were dominated by high-temperature/low-pressure metamorphism and relatively high geothermal gradients, resulting from the development of extended/hyperextended margins and bulk transtensional deformation. In this sense, retreating-mode accretionary orogens characterized the Early Paleozoic Gondwana margin, though short-lived pulses of compression/transpression also occurred. The existence of retreating subduction zones favoured mantle-derived magmatism and mixing with relatively young (meta)sedimentary sources in a thin continental crust. Crustal reworking of previous forearc sequences due to trenchward arc migration thus took place through assimilation and anatexis in the arc/back-arc regions. Therefore, retreating-mode accretionary orogens were the locus of Early Paleozoic crustal growth in Western Gondwana, intimately associated with major flare-up events, such as those related to the Cadomian and Famatian arcs. Slab roll back, probably resulting from decreasing convergence rates and plate velocities after Gondwana assembly, was a key factor for orogen-scale geodynamic processes. Coupled with synchronous oblique subduction and crustal-scale dextral deformation, slab roll back might trigger toroidal mantle flow, thus accounting for bulk dextral transtension, back-arc extension/transtension and a large-scale anticlockwise rotation of Gondwana mainland.es_ES
dc.format.extentp. 109-130es_ES
dc.language.isoenes_ES
dc.publisherElsevieres_ES
dc.relation.urihttps://doi.org/10.1016/j.gsf.2020.07.001es_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/-
dc.titleEarly Paleozoic accretionary orogens along the Western Gondwana margines_ES
dc.typeArticuloes_ES
dc.rights.licenseCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)-
dc.description.filiationOriolo, Sebastián. CONICET‐Universidad de Buenos Aires. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires (IGEBA); Argentina.es_ES
dc.description.filiationSchulz, Bernhard. Institute of Mineralogy, Division of Economic Geology and Petrology; Germany.es_ES
dc.description.filiationGeuna, Silvana. CONICET‐Universidad de Buenos Aires. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires (IGEBA); Argentina.es_ES
dc.description.filiationGonzález, Pablo Diego. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina.es_ES
dc.description.filiationOtamendi, Juan Enrique. CONICET, Departamento de Geología, Universidad Nacional de Río Cuarto. Argentina.es_ES
dc.description.filiationSláma, Sirí. Institute of Geology, The Czech Academy of Sciences. Republica Checa.es_ES
dc.description.filiationDruguet, Elena. Departament de Geologia, Universitat Aut onoma de Barcelona. España.es_ES
dc.description.filiationSiegesmund, Siegfred. Geoscience Centre, Georg-August-Universit€at Gottingen. Alemaniaes_ES
dc.subject.keywordRetreating Accretionary Orogenes_ES
dc.subject.keywordLower Paleozoices_ES
dc.subject.keywordCrustal Growthes_ES
dc.subject.keywordHf Isotopic Arrayes_ES
dc.subject.keywordFamatinianes_ES
dc.subject.keywordCadomianes_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
dc.subject.materiaCiencias Exactas y Naturaleses_ES
dc.origin.lugarDesarrolloUniversidad Nacional de Río Negroes_ES
dc.origin.lugarDesarrolloCONICET-Universidad de Buenos Aires, Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires (IGEBA), Intendente Güiraldes 2160, C1428EHA, Buenos Aires, Argentinaes_ES
dc.relation.journalissue12 (1)es_ES
dc.description.reviewtruees_ES
dc.description.resumen-es_ES
dc.identifier.doihttps://doi.org/10.1016/j.gsf.2020.07.001-
dc.relation.journalTitleGeoscience Frontierses_ES
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