Artículo

Agusto, M.R.; Caselli, A.; Daga, R.; Varekamp, J.; Trinelli, A.; Dos Santos Afonso, M.; Velez, M.L.; Euillades, P.; Ribeiro Guevara, S. "The crater lake of Copahue volcano (Argentina): Geochemical and thermal changes between 1995 and 2015" (2017) Geological Society Special Publication. 437(1):107-130
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Abstract:

The crater lake and associated hydrothermal features of Copahue volcano have been studied intensively over the last 20 years (1995-2015). The geochemical and isotopic compositions of the waters provide insights into the processes occurring in the volcanic-hydrothermal system, the crater lake and the thermal springs. Variations in the temperature and chemical composition of the waters reveal fundamental changes in the system that precede and accompany the magmatic and phreatic eruptive events at Copahue. A conceptual model of the summit system was developed involving the intrusion of slivers of magma in the hot acidic hydrothermal cell, the saturation of waters with secondary minerals leading to reduced permeability, the blocking of fluid pathways by liquid sulphur during heating events and the transport of gas from the magma through the ductile-brittle transition into the hydrothermal system. Geophysical data were integrated with the chemical data to provide new insights into the behaviour of the deep magmatic system that feeds the volcano edifice. Multidisciplinary studies were used to identify precursory signals of eruptive activity to give an early warning of pending volcanic hazards. Several geochemical ratios in river water were identified as potential indicators of upcoming volcanic activity, which could be used in co-operation with the community and local authorities to deal with these volcanic hazards. © 2017 The Author(s).

Registro:

Documento: Artículo
Título:The crater lake of Copahue volcano (Argentina): Geochemical and thermal changes between 1995 and 2015
Autor:Agusto, M.R.; Caselli, A.; Daga, R.; Varekamp, J.; Trinelli, A.; Dos Santos Afonso, M.; Velez, M.L.; Euillades, P.; Ribeiro Guevara, S.
Filiación:GESVA - IDEAN, Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, Buenos Aires, 1428EHA, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
LESVA - Instituto de Investigación Paleobiología y Geología, Universidad Nacional de Río Negro, Viedma, Río Negro, Argentina
Laboratorio de Análisis por Activación Neutrónica, CNEA, Bariloche, Argentina
Department of Earth and Environmental Sciences, Wesleyan University, Middletown, CT 06459, United States
LAQAGE - Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina
INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, FCEyN, Universidad de Buenos Aires, Argentina
CEDIAC, Facultad de Ingeniería, Universidad de Cuyo, Mendoza, Argentina
Palabras clave:crater lake; geochemistry; hydrothermal system; isotopic composition; magma; secondary mineral; temperature effect; Copahue; Neuquen; Southern Volcanic Zone
Año:2017
Volumen:437
Número:1
Página de inicio:107
Página de fin:130
DOI: http://dx.doi.org/10.1144/SP437.16
Título revista:Geological Society Special Publication
Título revista abreviado:Geol. Soc. Spec. Publ.
ISSN:03058719
Registro:http://digital.bl.fcen.uba.ar/collection/paper/document/paper_03058719_v437_n1_p107_Agusto

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Citas:

---------- APA ----------
Agusto, M.R., Caselli, A., Daga, R., Varekamp, J., Trinelli, A., Dos Santos Afonso, M., Velez, M.L.,..., Ribeiro Guevara, S. (2017) . The crater lake of Copahue volcano (Argentina): Geochemical and thermal changes between 1995 and 2015. Geological Society Special Publication, 437(1), 107-130.
http://dx.doi.org/10.1144/SP437.16
---------- CHICAGO ----------
Agusto, M.R., Caselli, A., Daga, R., Varekamp, J., Trinelli, A., Dos Santos Afonso, M., et al. "The crater lake of Copahue volcano (Argentina): Geochemical and thermal changes between 1995 and 2015" . Geological Society Special Publication 437, no. 1 (2017) : 107-130.
http://dx.doi.org/10.1144/SP437.16
---------- MLA ----------
Agusto, M.R., Caselli, A., Daga, R., Varekamp, J., Trinelli, A., Dos Santos Afonso, M., et al. "The crater lake of Copahue volcano (Argentina): Geochemical and thermal changes between 1995 and 2015" . Geological Society Special Publication, vol. 437, no. 1, 2017, pp. 107-130.
http://dx.doi.org/10.1144/SP437.16
---------- VANCOUVER ----------
Agusto, M.R., Caselli, A., Daga, R., Varekamp, J., Trinelli, A., Dos Santos Afonso, M., et al. The crater lake of Copahue volcano (Argentina): Geochemical and thermal changes between 1995 and 2015. Geol. Soc. Spec. Publ. 2017;437(1):107-130.
http://dx.doi.org/10.1144/SP437.16