Geochemistry of fluid discharges from Peteroa volcano (Argentina-Chile) in 2010-2015: Insights into compositional changes related to the fluid source region(s)
This study presents the first geochemical data of fluid discharges collected from February 2010 to March 2015 from the Planchón-Peteroa-Azufre Volcanic Complex (PPAVC), located in the Transitional Southern Volcanic Zone (TSVZ) at the border between Argentina and Chile. During the study period, from...
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todo:paper_00092541_v432_n_p41_Tassi2023-10-03T14:08:11Z Geochemistry of fluid discharges from Peteroa volcano (Argentina-Chile) in 2010-2015: Insights into compositional changes related to the fluid source region(s) Tassi, F. Aguilera, F. Benavente, O. Paonita, A. Chiodini, G. Caliro, S. Agusto, M. Gutierrez, F. Capaccioni, B. Vaselli, O. Caselli, A. Saltori, O. Andean volcanic chain Gas geochemistry Geochemical volcano monitoring Magmatic degassing Peteroa volcano Carbon dioxide Degassing Gases Geochemistry Geophysics Isotopes Sulfur dioxide Temperature Chemical signatures Compositional changes Gas geochemistry Hydrothermal fluids Isotopic composition Isotopic parameters Phreatomagmatic eruption Volcano monitoring Volcanoes degassing fluid composition hydrothermal fluid isotopic composition magma chemistry monitoring Argentina Chile Peteroa Volcano This study presents the first geochemical data of fluid discharges collected from February 2010 to March 2015 from the Planchón-Peteroa-Azufre Volcanic Complex (PPAVC), located in the Transitional Southern Volcanic Zone (TSVZ) at the border between Argentina and Chile. During the study period, from January 2010 to July 2011, Peteroa volcano experienced phreatic to phreatomagmatic eruption possibly related to the devastating Maule earthquake occurred on February 27, 2010. The compositional dataset includes low temperature (from 43.2 to 102 °C) gas discharges from (i) the summit of Peteroa volcano and (ii) the SE flank of Azufre volcano, both marked by a significant magmatic fluid contribution, as well as bubbling gases located at the foothill of the Peteroa volcanic edifice, which showed a chemical signature typical of hydrothermal fluids. In 2012, strong compositional changes affected the Peteroa gases from the summit area: the acidic gas species, especially SO 2 , increased, suggesting an input of fluids from magma degassing. Nevertheless, the R/Ra and δ 13 C-CO 2 values decreased, which would imply an enhanced contribution from a meteoric-hydrothermal source. In 2014-2015, the chemical and isotopic compositions of the 2010-2011 gases were partially restored. The anomalous decoupling between the chemical and the isotopic parameters was tentatively interpreted as produced by degassing activity from a small batch of dacitic magma that in 2012 masked the compositional signature of the magmatic fluids released from a basaltic magma that dominated the gas chemistry in 2010-2011. This explanation reliably justifies the observed geochemical data, although the mechanisms leading to the change in time of the dominating magmatic fluid source are not clear. At this regard, a geophysical survey able to provide information on the location of the two magma batches could be useful to clarify the possible relationships between the compositional changes that affected the Peteroa fluid discharges and the 2010-2011 eruptive activity. © 2016 Elsevier B.V. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00092541_v432_n_p41_Tassi |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Andean volcanic chain Gas geochemistry Geochemical volcano monitoring Magmatic degassing Peteroa volcano Carbon dioxide Degassing Gases Geochemistry Geophysics Isotopes Sulfur dioxide Temperature Chemical signatures Compositional changes Gas geochemistry Hydrothermal fluids Isotopic composition Isotopic parameters Phreatomagmatic eruption Volcano monitoring Volcanoes degassing fluid composition hydrothermal fluid isotopic composition magma chemistry monitoring Argentina Chile Peteroa Volcano |
| spellingShingle |
Andean volcanic chain Gas geochemistry Geochemical volcano monitoring Magmatic degassing Peteroa volcano Carbon dioxide Degassing Gases Geochemistry Geophysics Isotopes Sulfur dioxide Temperature Chemical signatures Compositional changes Gas geochemistry Hydrothermal fluids Isotopic composition Isotopic parameters Phreatomagmatic eruption Volcano monitoring Volcanoes degassing fluid composition hydrothermal fluid isotopic composition magma chemistry monitoring Argentina Chile Peteroa Volcano Tassi, F. Aguilera, F. Benavente, O. Paonita, A. Chiodini, G. Caliro, S. Agusto, M. Gutierrez, F. Capaccioni, B. Vaselli, O. Caselli, A. Saltori, O. Geochemistry of fluid discharges from Peteroa volcano (Argentina-Chile) in 2010-2015: Insights into compositional changes related to the fluid source region(s) |
| topic_facet |
Andean volcanic chain Gas geochemistry Geochemical volcano monitoring Magmatic degassing Peteroa volcano Carbon dioxide Degassing Gases Geochemistry Geophysics Isotopes Sulfur dioxide Temperature Chemical signatures Compositional changes Gas geochemistry Hydrothermal fluids Isotopic composition Isotopic parameters Phreatomagmatic eruption Volcano monitoring Volcanoes degassing fluid composition hydrothermal fluid isotopic composition magma chemistry monitoring Argentina Chile Peteroa Volcano |
| description |
This study presents the first geochemical data of fluid discharges collected from February 2010 to March 2015 from the Planchón-Peteroa-Azufre Volcanic Complex (PPAVC), located in the Transitional Southern Volcanic Zone (TSVZ) at the border between Argentina and Chile. During the study period, from January 2010 to July 2011, Peteroa volcano experienced phreatic to phreatomagmatic eruption possibly related to the devastating Maule earthquake occurred on February 27, 2010. The compositional dataset includes low temperature (from 43.2 to 102 °C) gas discharges from (i) the summit of Peteroa volcano and (ii) the SE flank of Azufre volcano, both marked by a significant magmatic fluid contribution, as well as bubbling gases located at the foothill of the Peteroa volcanic edifice, which showed a chemical signature typical of hydrothermal fluids. In 2012, strong compositional changes affected the Peteroa gases from the summit area: the acidic gas species, especially SO 2 , increased, suggesting an input of fluids from magma degassing. Nevertheless, the R/Ra and δ 13 C-CO 2 values decreased, which would imply an enhanced contribution from a meteoric-hydrothermal source. In 2014-2015, the chemical and isotopic compositions of the 2010-2011 gases were partially restored. The anomalous decoupling between the chemical and the isotopic parameters was tentatively interpreted as produced by degassing activity from a small batch of dacitic magma that in 2012 masked the compositional signature of the magmatic fluids released from a basaltic magma that dominated the gas chemistry in 2010-2011. This explanation reliably justifies the observed geochemical data, although the mechanisms leading to the change in time of the dominating magmatic fluid source are not clear. At this regard, a geophysical survey able to provide information on the location of the two magma batches could be useful to clarify the possible relationships between the compositional changes that affected the Peteroa fluid discharges and the 2010-2011 eruptive activity. © 2016 Elsevier B.V. |
| format |
JOUR |
| author |
Tassi, F. Aguilera, F. Benavente, O. Paonita, A. Chiodini, G. Caliro, S. Agusto, M. Gutierrez, F. Capaccioni, B. Vaselli, O. Caselli, A. Saltori, O. |
| author_facet |
Tassi, F. Aguilera, F. Benavente, O. Paonita, A. Chiodini, G. Caliro, S. Agusto, M. Gutierrez, F. Capaccioni, B. Vaselli, O. Caselli, A. Saltori, O. |
| author_sort |
Tassi, F. |
| title |
Geochemistry of fluid discharges from Peteroa volcano (Argentina-Chile) in 2010-2015: Insights into compositional changes related to the fluid source region(s) |
| title_short |
Geochemistry of fluid discharges from Peteroa volcano (Argentina-Chile) in 2010-2015: Insights into compositional changes related to the fluid source region(s) |
| title_full |
Geochemistry of fluid discharges from Peteroa volcano (Argentina-Chile) in 2010-2015: Insights into compositional changes related to the fluid source region(s) |
| title_fullStr |
Geochemistry of fluid discharges from Peteroa volcano (Argentina-Chile) in 2010-2015: Insights into compositional changes related to the fluid source region(s) |
| title_full_unstemmed |
Geochemistry of fluid discharges from Peteroa volcano (Argentina-Chile) in 2010-2015: Insights into compositional changes related to the fluid source region(s) |
| title_sort |
geochemistry of fluid discharges from peteroa volcano (argentina-chile) in 2010-2015: insights into compositional changes related to the fluid source region(s) |
| url |
http://hdl.handle.net/20.500.12110/paper_00092541_v432_n_p41_Tassi |
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