Intense magmatic degassing through the lake of Copahue volcano, 2013-2014

dc.creatorTamburello, Giancarlo
dc.creatorCaselli, Alberto Tomás
dc.creatorTassi, Franco
dc.creatorVaselli, Orlando
dc.creatorCalabrese, Sergio
dc.creatorRouwet, Dmitri
dc.creatorCapaccioni, B.
dc.creatorDi Napoli, R.
dc.creatorCardellini, Carlo
dc.creatorChiodini, Giovanni
dc.creatorBitetto, M.
dc.creatorBrusca, L.
dc.creatorBellomo, S.
dc.creatorAiuppa, Alessandro
dc.date2015-08
dc.date.accessioned2023-08-30T16:48:57Z
dc.date.available2023-08-30T16:48:57Z
dc.identifierTamburello, G., Caselli, Alberto Tomás., Tassi, F., Vaselli, O., Calabrese, S., et al. (2015) Intense magmatic degassing through the lake of Copahue volcano, 2013-2014. Blackwell Publishing Ltd; Journal of Geophysical Research: Solid Earth; 120; 9; 6071-6084
dc.identifier2169-9356
dc.identifierhttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2015JB012160
dc.identifierhttp://rid.unrn.edu.ar/handle/20.500.12049/5586
dc.identifierhttps://doi.org/10.1002/2015JB012160
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8538087
dc.descriptionFil: Tamburello, Giancarlo. Università degli Studi di Palermo; Italia
dc.descriptionFil: Caselli, Alberto Tomás. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
dc.descriptionFil: Tassi, Franco. Università degli Studi di Firenze; Italia
dc.descriptionFil: Vaselli, Orlando. Università degli Studi di Firenze; Italia
dc.descriptionFil: Calabrese, Sergio. Università degli Studi di Palermo; Italia
dc.descriptionFil: Rouwet, Dmitri. Istituto Nazionale di Geofisica e Vulcanologia; Italia
dc.descriptionFil: Capaccioni, B. Universidad de Bologna; Italia
dc.descriptionFil: Di Napoli, R. Università degli Studi di Palermo; Italia
dc.descriptionFil: Cardellini, Carlo. Università di Perugia; Italia
dc.descriptionFil: Chiodini, Giovanni. Istituto Nazionale di Geofisica e Vulcanologia; Italia
dc.descriptionFil: Bitetto, M. Università degli Studi di Palermo; Italia
dc.descriptionFil: Brusca, L. Istituto Nazionale Geofisica e Vulcanologia; Italia
dc.descriptionFil: Bellomo, S. Istituto Nazionale Geofisica e Vulcanologia; Italia
dc.descriptionFil: Aiuppa, Alessandro. Istituto Nazionale Geofisica e Vulcanologia; Italia
dc.descriptionHere we report on the first assessment of volatile fluxes from the hyperacid crater lake hosted within the summit crater of Copahue, a very active volcano on the Argentina-Chile border. Our observations were performed using a variety of in situ and remote sensing techniques during field campaigns in March 2013, when the crater hosted an active fumarole field, and in March 2014, when an acidic volcanic lake covered the fumarole field. In the latter campaign, we found that 566 to 1373 t d -1 of SO 2 were being emitted from the lake in a plume that appeared largely invisible. This, combined with our derived bulk plume composition, was converted into flux of other volcanic species (H 2 O ~ 10989 t d -1 , CO 2 ~ 638 t d -1 , HCl ~ 66 t d -1 , H 2 ~ 3.3 t d -1 , and HBr ~ 0.05 t d -1 ). These levels of degassing, comparable to those seen at many open-vent degassing arc volcanoes, were surprisingly high for a volcano hosting a crater lake. Copahue's unusual degassing regime was also confirmed by the chemical composition of the plume that, although issuing from a hot (65°C) lake, preserves a close-to-magmatic signature. EQ3/6 models of gas-water-rock interaction in the lake were able to match observed compositions and demonstrated that magmatic gases emitted to the atmosphere were virtually unaffected by scrubbing of soluble (S and Cl) species. Finally, the derived large H 2 O flux (10,988 t d -1 ) suggested a mechanism in which magmatic gas stripping drove enhanced lake water evaporation, a process likely common to many degassing volcanic lakes worldwide. Key Points First volatile flux record of crater lake gas emissions from Copahue volcano Magmatic gases breaching through the lake surface Magmatic gas stripping drive enhanced lake water evaporation
dc.descriptiontrue
dc.description-
dc.formatapplication/pdf
dc.languageen
dc.publisherBlackwell Publishing Ltd
dc.relation120 (9)
dc.relationJournal of Geophysical Research: Solid Earth
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/4.0/
dc.subjectCiencias Exactas y Naturales
dc.subjectCopahue
dc.subjectDegassing
dc.subjectVolcanic Lake
dc.subjectCiencias Exactas y Naturales
dc.titleIntense magmatic degassing through the lake of Copahue volcano, 2013-2014


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