The glaciovolcanic evolution of the Copahue volcano, Andean Southern Volcanic Zone, Argentina-Chile
Glaciovolcanism 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...
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ftconicet:oai:ri.conicet.gov.ar:11336/143734 2023-10-09T21:45:26+02:00 The glaciovolcanic evolution of the Copahue volcano, Andean Southern Volcanic Zone, Argentina-Chile Báez, Alejandro David Baez, Walter Ariel Caselli, Alberto Tomás Martini, Mateo Antonio Sommer, Carlos Augusto application/pdf http://hdl.handle.net/11336/143734 eng eng Elsevier Science info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0377027319305347 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jvolgeores.2020.106866 http://hdl.handle.net/11336/143734 Báez, Alejandro David; Baez, Walter Ariel; Caselli, Alberto Tomás; Martini, Mateo Antonio; Sommer, Carlos Augusto; The glaciovolcanic evolution of the Copahue volcano, Andean Southern Volcanic Zone, Argentina-Chile; Elsevier Science; Journal of Volcanology and Geothermal Research; 396; 106866; 5-2020; 1-20 0377-0273 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ CAVIAHUE-COPAHUE VOLCANIC COMPLEX GLACIOVOLCANISM LATE PLEISTOCENE VOLCANO-ICE INTERACTION https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.jvolgeores.2020.106866 2023-09-24T18:35:16Z Glaciovolcanism 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 Pleistocene 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 formation 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 glaciation 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). Fil: Báez, Alejandro David. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. ... Article in Journal/Newspaper Antarc* Antarctic Ice cap CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Patagonia Argentina Journal of Volcanology and Geothermal Research 396 106866 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
CAVIAHUE-COPAHUE VOLCANIC COMPLEX GLACIOVOLCANISM LATE PLEISTOCENE VOLCANO-ICE INTERACTION https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
CAVIAHUE-COPAHUE VOLCANIC COMPLEX GLACIOVOLCANISM LATE PLEISTOCENE VOLCANO-ICE INTERACTION https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Báez, Alejandro David Baez, Walter Ariel Caselli, Alberto Tomás Martini, Mateo Antonio Sommer, Carlos Augusto The glaciovolcanic evolution of the Copahue volcano, Andean Southern Volcanic Zone, Argentina-Chile |
topic_facet |
CAVIAHUE-COPAHUE VOLCANIC COMPLEX GLACIOVOLCANISM LATE PLEISTOCENE VOLCANO-ICE INTERACTION https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
Glaciovolcanism 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 Pleistocene 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 formation 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 glaciation 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). Fil: Báez, Alejandro David. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. ... |
format |
Article in Journal/Newspaper |
author |
Báez, Alejandro David Baez, Walter Ariel Caselli, Alberto Tomás Martini, Mateo Antonio Sommer, Carlos Augusto |
author_facet |
Báez, Alejandro David Baez, Walter Ariel Caselli, Alberto Tomás Martini, Mateo Antonio Sommer, Carlos Augusto |
author_sort |
Báez, Alejandro David |
title |
The glaciovolcanic evolution of the Copahue volcano, Andean Southern Volcanic Zone, Argentina-Chile |
title_short |
The glaciovolcanic evolution of the Copahue volcano, Andean Southern Volcanic Zone, Argentina-Chile |
title_full |
The glaciovolcanic evolution of the Copahue volcano, Andean Southern Volcanic Zone, Argentina-Chile |
title_fullStr |
The glaciovolcanic evolution of the Copahue volcano, Andean Southern Volcanic Zone, Argentina-Chile |
title_full_unstemmed |
The glaciovolcanic evolution of the Copahue volcano, Andean Southern Volcanic Zone, Argentina-Chile |
title_sort |
glaciovolcanic evolution of the copahue volcano, andean southern volcanic zone, argentina-chile |
publisher |
Elsevier Science |
url |
http://hdl.handle.net/11336/143734 |
geographic |
Antarctic The Antarctic Patagonia Argentina |
geographic_facet |
Antarctic The Antarctic Patagonia Argentina |
genre |
Antarc* Antarctic Ice cap |
genre_facet |
Antarc* Antarctic Ice cap |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0377027319305347 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jvolgeores.2020.106866 http://hdl.handle.net/11336/143734 Báez, Alejandro David; Baez, Walter Ariel; Caselli, Alberto Tomás; Martini, Mateo Antonio; Sommer, Carlos Augusto; The glaciovolcanic evolution of the Copahue volcano, Andean Southern Volcanic Zone, Argentina-Chile; Elsevier Science; Journal of Volcanology and Geothermal Research; 396; 106866; 5-2020; 1-20 0377-0273 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.jvolgeores.2020.106866 |
container_title |
Journal of Volcanology and Geothermal Research |
container_volume |
396 |
container_start_page |
106866 |
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1779318677833777152 |