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dc.contributor.authorBáez, Alejandro David-
dc.contributor.authorBáez, Walter-
dc.contributor.authorCaselli, Alberto Tomás-
dc.contributor.authorMartini, Mateo A.-
dc.contributor.authorSommer, Carlos Augusto-
dc.date.accessioned2020-05-28T12:42:11Z-
dc.date.available2020-05-28T12:42:11Z-
dc.date.issued2020-03-25-
dc.identifier.citationBáez, Alejandro D., Báez, Walter., Caselli, Alberto T., Martini, Mateo A. y Sommer, Carlos A. (2020). The glaciovolcanic evolution of the Copahue volcano, Andean Southern Volcanic Zone, Argentina-Chile. Elsevier; Journal of Volcanology and Geothermal Research; 396; 2-20es_ES
dc.identifier.issn0377-0273es_ES
dc.identifier.urihttps://rid.unrn.edu.ar/jspui/handle/20.500.12049/5129-
dc.description.abstractGlaciovolcanism produces distinctive features that are useful paleoclimate proxies for the distribution of past ice sheets and glacier extent. The Copahue volcano located in the Andean Southern Volcanic Zone, Argentina-Chile, is an active composite volcano known to have glaciovolcanic features such as lava bodies with glassy margins and anomalous cooling fractures. However, the emplacement conditions of these products and the influence of Pleis-tocene glaciations on the evolution of the Copahue volcano remains poorly understood. In this contribution, we propose a model for glaciovolcanic evolution of the Copahue volcano based on the analysis, interpretation, and mapping of its products. Ten lithofacies are described on the eastern flank of Copahue volcano exhibiting several examples of glaciovolcanism. The evolution of the Copahue volcano can be divided into two main sequences: the Ancient Sequence (S1) and the Young Sequence (S2), separated by a major erosive phase. The S1 (early-middle Pleistocene-late Pleistocene) consists of an initial subaerial effusive stage followed by a major glaciovolcanic stage, during which a thick ice cap existed and the edifice grew beneath an englacial lake with the eventual for-mation of a lava-fed delta. The S2 (late Pleistocene-Present) is defined by mainly effusive activity during periods of glacial advance and retreat recorded by an alternation of unconfined subaerial lavas and ice-confined lavas. The evolution of the Copahue volcano therefore indicates two glaciations in the Copahue-Caviahue area during the late Pleistocene, in contrast to a single glaciation. Based on the glacial history in the area we associate the first gla-ciation with the end of Marine Isotope Stage 3 (57–29 ka) and/or the Last Glacial Maximum period (26.5–19.0 ka), and the second less-extensive glacial period with the Antarctic Cold Reversal (14.5–12.9 ka).es_ES
dc.format.extentp. 2-20es_ES
dc.format.mediumdigitales_ES
dc.language.isoenes_ES
dc.publisherElsevieres_ES
dc.titleThe glaciovolcanic evolution of the Copahue volcano, Andean Southern Volcanic Zone, Argentina-Chilees_ES
dc.typeArticuloes_ES
dc.rights.licensehttps://creativecommons.org/licenses/by-nc-sa/4.0/es_ES
dc.description.filiationFil: Báez, Alejandro D. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina.es_ES
dc.description.filiationFil: Báez, Walter. Universidad Nacional de Salta. IBIGEO. Salta, Argentina.es_ES
dc.description.filiationFil: Caselli, Alberto Tomás Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina.es_ES
dc.description.filiationFil: Martini, Mateo A. Universidad de Chile. Núcleo Milenio Paleoclima. Santiago, Chile.es_ES
dc.description.filiationFil: Sommer, Carlos A. Universidade Federal do Rio Grande do Sul. Porto Alegre, Brazil.es_ES
dc.description.filiationFil: Báez, Alejandro D. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina.es_ES
dc.description.filiationFil: Báez, Walter. Consejo Nacional de Investigaciones Científicas y Técnicas. Salta, Argentina.es_ES
dc.description.filiationFil: Caselli, Alberto Tomás Consejo Nacional de Investigaciones Científicas y Técnicas. Río Negro, Argentina.es_ES
dc.description.filiationFil: Martini, Mateo A. Pontificia Universidad Católica de Chile. Instituto de Geografía. Santiago, Chile.es_ES
dc.description.filiationFil: Martini, Mateo A. Universidad Nacional de Cordoba. Facultad de Ciencias Exactas, Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra. Cordoba, Argentina.es_ES
dc.description.filiationFil: Martini, Mateo A. Consejo Nacional de Investigaciones Científicas y Técnicas. Cordoba, Argentina.es_ES
dc.subject.keywordGlaciovolcanism,es_ES
dc.subject.keywordVolcano-ice interactiones_ES
dc.subject.keywordCaviahue-Copahue volcanic complexes_ES
dc.subject.keywordLate Pleistocenees_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
dc.origin.lugarDesarrolloUniversidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología.es_ES
dc.relation.journalissue396es_ES
dc.description.reviewtruees_ES
dc.description.resumenGlaciovolcanism produces distinctive features that are useful paleoclimate proxies for the distribution of past ice sheets and glacier extent. The Copahue volcano located in the Andean Southern Volcanic Zone, Argentina-Chile, is an active composite volcano known to have glaciovolcanic features such as lava bodies with glassy margins and anomalous cooling fractures. However, the emplacement conditions of these products and the influence of Pleis-tocene glaciations on the evolution of the Copahue volcano remains poorly understood. In this contribution, we propose a model for glaciovolcanic evolution of the Copahue volcano based on the analysis, interpretation, and mapping of its products. Ten lithofacies are described on the eastern flank of Copahue volcano exhibiting several examples of glaciovolcanism. The evolution of the Copahue volcano can be divided into two main sequences: the Ancient Sequence (S1) and the Young Sequence (S2), separated by a major erosive phase. The S1 (early-middle Pleistocene-late Pleistocene) consists of an initial subaerial effusive stage followed by a major glaciovolcanic stage, during which a thick ice cap existed and the edifice grew beneath an englacial lake with the eventual for-mation of a lava-fed delta. The S2 (late Pleistocene-Present) is defined by mainly effusive activity during periods of glacial advance and retreat recorded by an alternation of unconfined subaerial lavas and ice-confined lavas. The evolution of the Copahue volcano therefore indicates two glaciations in the Copahue-Caviahue area during the late Pleistocene, in contrast to a single glaciation. Based on the glacial history in the area we associate the first gla-ciation with the end of Marine Isotope Stage 3 (57–29 ka) and/or the Last Glacial Maximum period (26.5–19.0 ka), and the second less-extensive glacial period with the Antarctic Cold Reversal (14.5–12.9 ka).es_ES
dc.identifier.doihttps://doi.org/10.1016/j.jvolgeores.2020.106866-
dc.relation.journalTitleJournal of Volcanology and Geothermal Researches_ES
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