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dc.contributor.author
Tassi, Franco  
dc.contributor.author
Aguilera, F.  
dc.contributor.author
Benavente, O.  
dc.contributor.author
Paonita, A.  
dc.contributor.author
Chiodini, Giovanni  
dc.contributor.author
Caliro, S.  
dc.contributor.author
Agusto, Mariano Roberto  
dc.contributor.author
Gutierrez, F.  
dc.contributor.author
Capaccioni, B.  
dc.contributor.author
Vaselli, O.  
dc.contributor.author
Caselli, Alberto Tomás  
dc.contributor.author
Saltori, O.  
dc.date.available
2017-07-27T19:46:01Z  
dc.date.issued
2016-04  
dc.identifier.citation
Tassi, Franco; Aguilera, F.; Benavente, O.; Paonita, A.; Chiodini, Giovanni; et al.; Geochemistry of fluid discharges from Peteroa volcano (Argentina-Chile) in 2010-2015: Insights into compositional changes related to the fluid source region(s); Elsevier Science; Chemical Geology; 432; 4-2016; 41-53  
dc.identifier.issn
0009-2541  
dc.identifier.uri
http://hdl.handle.net/11336/21490  
dc.description.abstract
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 SO2, increased, suggesting an input of fluids from magma degassing. Nevertheless, the R/Ra and δ13C–CO2 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.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Science  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/  
dc.subject
Gas  
dc.subject
Geochemistry  
dc.subject
Peteroa  
dc.subject
Volcano  
dc.subject.classification
Vulcanología  
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
Geochemistry of fluid discharges from Peteroa volcano (Argentina-Chile) in 2010-2015: Insights into compositional changes related to the fluid source region(s)  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2017-07-13T18:16:28Z  
dc.journal.volume
432  
dc.journal.pagination
41-53  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Tassi, Franco. Universita Degli Studi Di Firenze; Italia  
dc.description.fil
Fil: Aguilera, F.. Servicio Nacional de Geología y Minería; Chile  
dc.description.fil
Fil: Benavente, O.. Universidad de Chile; Chile  
dc.description.fil
Fil: Paonita, A.. Istituto Nazionale Di Geofisica E Vulcanologia; Italia  
dc.description.fil
Fil: Chiodini, Giovanni. Istituto Nazionale Di Geofisica E Vulcanologia; Italia  
dc.description.fil
Fil: Caliro, S.. Istituto Nazionale Di Geofisica E Vulcanologia; Italia  
dc.description.fil
Fil: Agusto, Mariano Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina  
dc.description.fil
Fil: Gutierrez, F.. Universidad de Chile; Chile. Advanced Mining Technology Center; Chile  
dc.description.fil
Fil: Capaccioni, B.. Department of Earth and Geological -Environmental Science; Italia  
dc.description.fil
Fil: Vaselli, O.. Universita Degli Studi Di Firenze; Italia  
dc.description.fil
Fil: Caselli, Alberto Tomás. Universidad Nacional de Rio Negro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina  
dc.description.fil
Fil: Saltori, O.. Universidad de Chile; Chile  
dc.journal.title
Chemical Geology  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.chemgeo.2016.04.007  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0009254116301826