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...

Descripción completa

Guardado en:
Detalles Bibliográficos
Publicado: 2017
Materias:
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v74_n2_p191_Daga
http://hdl.handle.net/20.500.12110/paper_00044822_v74_n2_p191_Daga
Aporte de:
id paper:paper_00044822_v74_n2_p191_Daga
record_format dspace
spelling paper:paper_00044822_v74_n2_p191_Daga2023-06-08T14:26:58Z Tephras emitted during the initial hydromagmatic phase (July 2012) of the 2012-2016 eruptive cycle of the copahue volcano (andes del sur) 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. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v74_n2_p191_Daga 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
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.
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)
publishDate 2017
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v74_n2_p191_Daga
http://hdl.handle.net/20.500.12110/paper_00044822_v74_n2_p191_Daga
_version_ 1768542342588923904