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

Autor: Tamburello G.[1], Agusto M.[2], Caselli A.[2], Tassi F.[3, Vaselli O.[3, Calabrese S.[1], Rouwet D.[5], Capaccioni B.[6], Di Napoli R.[1], Cardellini C.[7], Chiodini G.[5], Bitetto M.[1], Brusca L.[8], Bellomo S.[8], Aiuppa A.[1
Přispěvatelé: G. Tamburello, M. Agusto, A. Caselli, F. Tassi, O. Vaselli, S. Calabrese, D. Rouwet, B. Capaccioni, R. Di Napoli, C. Cardellini, G. Chiodini, M. Bitetto, L. Brusca, S. Bellomo, A. Aiuppa, Tamburello, G., Agusto, M., Caselli, A., Tassi, F., Vaselli, O., Calabrese, S., Rouwet, D., Capaccioni, B., Di Napoli, R., Cardellini, C., Chiodini, G., Bitetto, M., Brusca, L., Bellomo, S., Aiuppa, A.
Rok vydání: 2015
Předmět:
Atmospheric Science
010504 meteorology & atmospheric sciences
Earth science
Geochemistry
Soil Science
Aquatic Science
Oceanography
010502 geochemistry & geophysics
01 natural sciences
Ciencias de la Tierra y relacionadas con el Medio Ambiente
Atmosphere
Vulcanología
Flux (metallurgy)
Impact crater
Geochemistry and Petrology
Crater lake
Earth and Planetary Sciences (miscellaneous)
COPAHUE
Copahue
volcanic lake
degassing
Geophysic
Ciencias Exactas y Naturales
Chemical composition
Water Science and Technology
0105 earth and related environmental sciences
volcanic lake
geography
Magmatic gases
geography.geographical_feature_category
Ecology
Copahue
Paleontology
degassing
Forestry
Fumarole
Plume
DEGASSING
Geophysics
Volcano
13. Climate action
Space and Planetary Science
Earth-Surface Processe
Copahue volcano
volatile flux from crater lake
CIENCIAS NATURALES Y EXACTAS
Geology
VOLCANIC LAKE
Zdroj: RID-UNRN (UNRN)
Universidad Nacional de Río Negro
instacron:UNRN
Journal of geophysical research (Online) 120 (2015): 6071–6084. doi:10.1002/2015JB012160
info:cnr-pdr/source/autori:Tamburello G.[1], Agusto M.[2], Caselli A.[2], Tassi F.[3,4], Vaselli O.[3,4], Calabrese S.[1], Rouwet D.[5], Capaccioni B.[6], Di Napoli R.[1], Cardellini C.[7], Chiodini G.[5], Bitetto M.[1], Brusca L.[8], Bellomo S.[8], Aiuppa A.[1,8]/titolo:Intense magmatic degassing through the lake of Copahue volcano, 2013-2014/doi:10.1002%2F2015JB012160/rivista:Journal of geophysical research (Online)/anno:2015/pagina_da:6071/pagina_a:6084/intervallo_pagine:6071–6084/volume:120
ISSN: 2169-9356
2169-9313
DOI: 10.1002/2015jb012160
Popis: Here 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 Fil: Tamburello, G.. Università degli Studi di Palermo; Italia Fil: Caselli, Alberto Tomás. 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 Fil: Tassi, F.. Università degli Studi di Firenze; Italia Fil: Vaselli, O.. Università degli Studi di Firenze; Italia Fil: Calabrese, S.. Università degli Studi di Palermo; Italia Fil: Rouwet, D.. Istituto Nazionale di Geofisica e Vulcanologia; Italia Fil: Capaccioni, B.. Universidad de Bologna; Italia Fil: Di Napoli, R.. Università degli Studi di Palermo; Italia Fil: Cardellini, C.. Università di Perugia; Italia Fil: Chiodini, G.. Istituto Nazionale di Geofisica e Vulcanologia; Italia Fil: Bitetto, M.. Università degli Studi di Palermo; Italia Fil: Brusca, L.. Istituto Nazionale Geofisica e Vulcanologia; Italia Fil: Bellomo, S.. Istituto Nazionale Geofisica e Vulcanologia; Italia Fil: Aiuppa, A.. Istituto Nazionale Geofisica e Vulcanologia; Italia
Databáze: OpenAIRE
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