Tephras emitted during the initial hydromagmatic phase (July 2012) of the 2012-2016 eruptive cycle of the copahue volcano (andes del sur)
Copahue volcano has a record of historical eruptions of low intensity which have mainly been characterized from the events observed in last decades. Significant changes in several parameters associated with the volcano activity were observed since the end of 2011. After 12 years of quiescence, on J...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00044822_v74_n2_p191_Daga |
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todo:paper_00044822_v74_n2_p191_Daga2023-10-03T13:59:18Z Tephras emitted during the initial hydromagmatic phase (July 2012) of the 2012-2016 eruptive cycle of the copahue volcano (andes del sur) Daga, R. Caselli, A. Ribeiro Guevara, S. Agusto, M. Hydromagmatic eruption Pyroclastic products Pyroclastic sulfur Southern Volcanic Zone phreatomagmatism pyroclastic deposit pyroclastic flow sulfur tephra volcanic eruption volcanology Copahue Neuquen Southern Volcanic Zone Copahue volcano has a record of historical eruptions of low intensity which have mainly been characterized from the events observed in last decades. Significant changes in several parameters associated with the volcano activity were observed since the end of 2011. After 12 years of quiescence, on July 2012, the volcano started a new eruptive period. In this work, the characterization of the pyroclastic products emitted on 19th July 2012 is presented. Although the limited dispersion of the event, its study is central in the definition of the character of the initial phase of the eruptive cycle. A high proportion of lithics and the presence of juvenile first-cycled vitroclasts studied in detail allow us to characterize the eruptive mechanism, consistent with a phreatomagmatic eruption. A distinctive feature of the tephra is the presence of pyroclastic sulfur. Although these kinds of particles have been identified in previous eruptions, its presence is crucial revealing the existence of molten sulfur under the crater lake. The participation of this precipitated material allow us to infer its influence in the eruptive mechanism. © 2017, Asociacion Geologica Argentina. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v74_n2_p191_Daga |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Hydromagmatic eruption Pyroclastic products Pyroclastic sulfur Southern Volcanic Zone phreatomagmatism pyroclastic deposit pyroclastic flow sulfur tephra volcanic eruption volcanology Copahue Neuquen Southern Volcanic Zone |
| spellingShingle |
Hydromagmatic eruption Pyroclastic products Pyroclastic sulfur Southern Volcanic Zone phreatomagmatism pyroclastic deposit pyroclastic flow sulfur tephra volcanic eruption volcanology Copahue Neuquen Southern Volcanic Zone Daga, R. Caselli, A. Ribeiro Guevara, S. Agusto, M. Tephras emitted during the initial hydromagmatic phase (July 2012) of the 2012-2016 eruptive cycle of the copahue volcano (andes del sur) |
| topic_facet |
Hydromagmatic eruption Pyroclastic products Pyroclastic sulfur Southern Volcanic Zone phreatomagmatism pyroclastic deposit pyroclastic flow sulfur tephra volcanic eruption volcanology Copahue Neuquen Southern Volcanic Zone |
| description |
Copahue volcano has a record of historical eruptions of low intensity which have mainly been characterized from the events observed in last decades. Significant changes in several parameters associated with the volcano activity were observed since the end of 2011. After 12 years of quiescence, on July 2012, the volcano started a new eruptive period. In this work, the characterization of the pyroclastic products emitted on 19th July 2012 is presented. Although the limited dispersion of the event, its study is central in the definition of the character of the initial phase of the eruptive cycle. A high proportion of lithics and the presence of juvenile first-cycled vitroclasts studied in detail allow us to characterize the eruptive mechanism, consistent with a phreatomagmatic eruption. A distinctive feature of the tephra is the presence of pyroclastic sulfur. Although these kinds of particles have been identified in previous eruptions, its presence is crucial revealing the existence of molten sulfur under the crater lake. The participation of this precipitated material allow us to infer its influence in the eruptive mechanism. © 2017, Asociacion Geologica Argentina. All rights reserved. |
| format |
JOUR |
| author |
Daga, R. Caselli, A. Ribeiro Guevara, S. Agusto, M. |
| author_facet |
Daga, R. Caselli, A. Ribeiro Guevara, S. Agusto, M. |
| author_sort |
Daga, R. |
| title |
Tephras emitted during the initial hydromagmatic phase (July 2012) of the 2012-2016 eruptive cycle of the copahue volcano (andes del sur) |
| title_short |
Tephras emitted during the initial hydromagmatic phase (July 2012) of the 2012-2016 eruptive cycle of the copahue volcano (andes del sur) |
| title_full |
Tephras emitted during the initial hydromagmatic phase (July 2012) of the 2012-2016 eruptive cycle of the copahue volcano (andes del sur) |
| title_fullStr |
Tephras emitted during the initial hydromagmatic phase (July 2012) of the 2012-2016 eruptive cycle of the copahue volcano (andes del sur) |
| title_full_unstemmed |
Tephras emitted during the initial hydromagmatic phase (July 2012) of the 2012-2016 eruptive cycle of the copahue volcano (andes del sur) |
| title_sort |
tephras emitted during the initial hydromagmatic phase (july 2012) of the 2012-2016 eruptive cycle of the copahue volcano (andes del sur) |
| url |
http://hdl.handle.net/20.500.12110/paper_00044822_v74_n2_p191_Daga |
| work_keys_str_mv |
AT dagar tephrasemittedduringtheinitialhydromagmaticphasejuly2012ofthe20122016eruptivecycleofthecopahuevolcanoandesdelsur AT casellia tephrasemittedduringtheinitialhydromagmaticphasejuly2012ofthe20122016eruptivecycleofthecopahuevolcanoandesdelsur AT ribeiroguevaras tephrasemittedduringtheinitialhydromagmaticphasejuly2012ofthe20122016eruptivecycleofthecopahuevolcanoandesdelsur AT agustom tephrasemittedduringtheinitialhydromagmaticphasejuly2012ofthe20122016eruptivecycleofthecopahuevolcanoandesdelsur |
| _version_ |
1782030368701939712 |