Hawaiian and Strombolian style monogenetic volcanism in the extra-Andean domain of central-west Argentina

In the provinces of Mendoza and La Pampa (central-western Argentina), retroarc volcanism was active from the Miocene through historic times. There are approximately 40 basaltic eruptive centers between 36°S and 37°30′S to the East of 68°40′W. These centers were studied in order to define their volca...

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Autores principales: Bertotto, Gustavo Walter, Bjerg, Ernesto A., Cingolani, Carlos Alberto
Formato: Articulo
Lenguaje:Inglés
Publicado: 2006
Materias:
Geología
monogenetic volcanoes
basalts
Argentina
Hawaiian
Strombolian
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/175814
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-175814
record_format dspace
spelling I19-R120-10915-1758142025-01-30T04:15:55Z http://sedici.unlp.edu.ar/handle/10915/175814 Hawaiian and Strombolian style monogenetic volcanism in the extra-Andean domain of central-west Argentina Bertotto, Gustavo Walter Bjerg, Ernesto A. Cingolani, Carlos Alberto 2006 2025-01-29T15:16:30Z en Geología monogenetic volcanoes basalts Argentina Hawaiian Strombolian In the provinces of Mendoza and La Pampa (central-western Argentina), retroarc volcanism was active from the Miocene through historic times. There are approximately 40 basaltic eruptive centers between 36°S and 37°30′S to the East of 68°40′W. These centers were studied in order to define their volcanological evolution. The vents are constituted of seven lithofacies: i.e., (A-1) weakly welded lapilli and bomb beds; (A-2) agglutinated spatter and bomb beds; (A-3) agglutinated spatter beds; (B) ash beds; (C) lava flows; (D) conduit fill; and (E) dikes. Three eruptive episodes (phases) were identified. The first one generated agglutinated spatter and bomb beds (lithofacies A-2), which constitute the internal part of the edifices. These are followed by weakly welded lapilli and bomb beds (lithofacies A-1) and agglutinated spatter beds (lithofacies A-3). The final episode includes lava flows (lithofacies C), minor agglutinated spatter deposits (lithofacies A-3) and isolated lapilli and bomb clasts. We postulate Hawaiian style fountaining activity as responsible for the generation of agglutinated spatter and bombs beds, and variations between Strombolian and Hawaiian activity for the formation of successions of weakly welded lapilli and bomb beds and agglutinated spatter beds. The vent features and the homogeneity of the erupted magma suggest that the studied volcanoes were monogenetic. Centro de Investigaciones Geológicas Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 430-444
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
monogenetic volcanoes
basalts
Argentina
Hawaiian
Strombolian
spellingShingle Geología
monogenetic volcanoes
basalts
Argentina
Hawaiian
Strombolian
Bertotto, Gustavo Walter
Bjerg, Ernesto A.
Cingolani, Carlos Alberto
Hawaiian and Strombolian style monogenetic volcanism in the extra-Andean domain of central-west Argentina
topic_facet Geología
monogenetic volcanoes
basalts
Argentina
Hawaiian
Strombolian
description In the provinces of Mendoza and La Pampa (central-western Argentina), retroarc volcanism was active from the Miocene through historic times. There are approximately 40 basaltic eruptive centers between 36°S and 37°30′S to the East of 68°40′W. These centers were studied in order to define their volcanological evolution. The vents are constituted of seven lithofacies: i.e., (A-1) weakly welded lapilli and bomb beds; (A-2) agglutinated spatter and bomb beds; (A-3) agglutinated spatter beds; (B) ash beds; (C) lava flows; (D) conduit fill; and (E) dikes. Three eruptive episodes (phases) were identified. The first one generated agglutinated spatter and bomb beds (lithofacies A-2), which constitute the internal part of the edifices. These are followed by weakly welded lapilli and bomb beds (lithofacies A-1) and agglutinated spatter beds (lithofacies A-3). The final episode includes lava flows (lithofacies C), minor agglutinated spatter deposits (lithofacies A-3) and isolated lapilli and bomb clasts. We postulate Hawaiian style fountaining activity as responsible for the generation of agglutinated spatter and bombs beds, and variations between Strombolian and Hawaiian activity for the formation of successions of weakly welded lapilli and bomb beds and agglutinated spatter beds. The vent features and the homogeneity of the erupted magma suggest that the studied volcanoes were monogenetic.
format Articulo
Articulo
author Bertotto, Gustavo Walter
Bjerg, Ernesto A.
Cingolani, Carlos Alberto
author_facet Bertotto, Gustavo Walter
Bjerg, Ernesto A.
Cingolani, Carlos Alberto
author_sort Bertotto, Gustavo Walter
title Hawaiian and Strombolian style monogenetic volcanism in the extra-Andean domain of central-west Argentina
title_short Hawaiian and Strombolian style monogenetic volcanism in the extra-Andean domain of central-west Argentina
title_full Hawaiian and Strombolian style monogenetic volcanism in the extra-Andean domain of central-west Argentina
title_fullStr Hawaiian and Strombolian style monogenetic volcanism in the extra-Andean domain of central-west Argentina
title_full_unstemmed Hawaiian and Strombolian style monogenetic volcanism in the extra-Andean domain of central-west Argentina
title_sort hawaiian and strombolian style monogenetic volcanism in the extra-andean domain of central-west argentina
publishDate 2006
url http://sedici.unlp.edu.ar/handle/10915/175814
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AT bjergernestoa hawaiianandstrombolianstylemonogeneticvolcanismintheextraandeandomainofcentralwestargentina
AT cingolanicarlosalberto hawaiianandstrombolianstylemonogeneticvolcanismintheextraandeandomainofcentralwestargentina
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