Geochemical characterization of the volcanic gases at Deception Island (South Shetland Islands, Antarctica)

Intense and periodical monitoring of fumaroles discharges of the Deception Island at Antarctica was made from 1993 until 1998, for every austral summer survey. The geochemical changes suggested that the fumaroles, at the anomaly area of Fumaroles Bay, have a strong hydrothermal character. Two differ...

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Autores principales: Caselli, A.T., Dos Santos Afonso, M., Risso, C., García, A., Ortiz, R.
Formato: JOUR
Materias:
Antarctica
Deception Island
Fumarole
Geochemistry
Monitoring
fumarole
geochemistry
hydrothermal activity
volcanic gas
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v57_n1_p69_Caselli
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00044822_v57_n1_p69_Caselli
record_format dspace
spelling todo:paper_00044822_v57_n1_p69_Caselli2023-10-03T13:57:40Z Geochemical characterization of the volcanic gases at Deception Island (South Shetland Islands, Antarctica) Caselli, A.T. Dos Santos Afonso, M. Risso, C. García, A. Ortiz, R. Antarctica Deception Island Fumarole Geochemistry Monitoring fumarole geochemistry hydrothermal activity volcanic gas Antarctica Intense and periodical monitoring of fumaroles discharges of the Deception Island at Antarctica was made from 1993 until 1998, for every austral summer survey. The geochemical changes suggested that the fumaroles, at the anomaly area of Fumaroles Bay, have a strong hydrothermal character. Two different hydrological processes, with different magnitude, were used to explain the observed chemical variations. The gas fluid chemical compositions also have a correlation with the seismic activity. Some of the gas components, such as H2, CO2, CH4, C2H6, etc, increase their gas concentration while the seismic activity is increasing. The results obtained with a high number of seismic events show a good correlation between the H2S and CO2 composition of fluids. In opposition, the results obtained during a low seismic events season show a high dispersion on the data composition. The linear correlation should be assigned to a predominant magmatic effect while the dispersion should be related to a predominant hydrological effect. In a first approximation the linear relation of H2S with CO2 and H2O with H2S should be used as an indicator parameter of the increasing magmatic flux. These geochemical characteristics of the gas fluids should be used for monitoring and testing the eruptive activity. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v57_n1_p69_Caselli
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Antarctica
Deception Island
Fumarole
Geochemistry
Monitoring
fumarole
geochemistry
hydrothermal activity
volcanic gas
Antarctica
spellingShingle Antarctica
Deception Island
Fumarole
Geochemistry
Monitoring
fumarole
geochemistry
hydrothermal activity
volcanic gas
Antarctica
Caselli, A.T.
Dos Santos Afonso, M.
Risso, C.
García, A.
Ortiz, R.
Geochemical characterization of the volcanic gases at Deception Island (South Shetland Islands, Antarctica)
topic_facet Antarctica
Deception Island
Fumarole
Geochemistry
Monitoring
fumarole
geochemistry
hydrothermal activity
volcanic gas
Antarctica
description Intense and periodical monitoring of fumaroles discharges of the Deception Island at Antarctica was made from 1993 until 1998, for every austral summer survey. The geochemical changes suggested that the fumaroles, at the anomaly area of Fumaroles Bay, have a strong hydrothermal character. Two different hydrological processes, with different magnitude, were used to explain the observed chemical variations. The gas fluid chemical compositions also have a correlation with the seismic activity. Some of the gas components, such as H2, CO2, CH4, C2H6, etc, increase their gas concentration while the seismic activity is increasing. The results obtained with a high number of seismic events show a good correlation between the H2S and CO2 composition of fluids. In opposition, the results obtained during a low seismic events season show a high dispersion on the data composition. The linear correlation should be assigned to a predominant magmatic effect while the dispersion should be related to a predominant hydrological effect. In a first approximation the linear relation of H2S with CO2 and H2O with H2S should be used as an indicator parameter of the increasing magmatic flux. These geochemical characteristics of the gas fluids should be used for monitoring and testing the eruptive activity.
format JOUR
author Caselli, A.T.
Dos Santos Afonso, M.
Risso, C.
García, A.
Ortiz, R.
author_facet Caselli, A.T.
Dos Santos Afonso, M.
Risso, C.
García, A.
Ortiz, R.
author_sort Caselli, A.T.
title Geochemical characterization of the volcanic gases at Deception Island (South Shetland Islands, Antarctica)
title_short Geochemical characterization of the volcanic gases at Deception Island (South Shetland Islands, Antarctica)
title_full Geochemical characterization of the volcanic gases at Deception Island (South Shetland Islands, Antarctica)
title_fullStr Geochemical characterization of the volcanic gases at Deception Island (South Shetland Islands, Antarctica)
title_full_unstemmed Geochemical characterization of the volcanic gases at Deception Island (South Shetland Islands, Antarctica)
title_sort geochemical characterization of the volcanic gases at deception island (south shetland islands, antarctica)
url http://hdl.handle.net/20.500.12110/paper_00044822_v57_n1_p69_Caselli
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AT rissoc geochemicalcharacterizationofthevolcanicgasesatdeceptionislandsouthshetlandislandsantarctica
AT garciaa geochemicalcharacterizationofthevolcanicgasesatdeceptionislandsouthshetlandislandsantarctica
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