6533b858fe1ef96bd12b6cee
RESEARCH PRODUCT
The hydrothermal system of the Domuyo volcanic complex (Argentina): A conceptual model based on new geochemical and isotopic evidences
Caterina LiccioliChiara CaponiFranco TassiJens FiebigAlberto Tomás CaselliOrlando VaselliSergio CalabreseStefano CaliroGiovannella PecorainoGiovanni ChiodiniMariano Roberto AgustoL. Tempestisubject
Alternative Energy Source010504 meteorology & atmospheric sciencesHydrothermal FluidGeochemistryAquifer010502 geochemistry & geophysics01 natural sciencesHydrothermal circulationRainwater harvestingDomuyo Volcanic ComplexCiencias de la Tierra y relacionadas con el Medio AmbienteGeothermometryGeochemistry and PetrologyGeomorphologyGeothermal gradientCiencias Exactas y NaturalesGeothermal System0105 earth and related environmental sciencesgeographygeography.geographical_feature_categoryGroundwater rechargeDilutionGeophysicsVolcanoMagmaMeteorología y Ciencias AtmosféricasGeologyCIENCIAS NATURALES Y EXACTASdescription
The Domuyo volcanic complex (Neuquén Province, Argentina) hosts one of the most promising geothermal systems of Patagonia, giving rise to thermal manifestations discharging hot and Cl−-rich fluids. This study reports a complete geochemical dataset of gas and water samples collected in three years (2013, 2014 and 2015) from the main fluid discharges of this area. The chemical and isotopic composition (δD-H2O and δ18O-H2O) of waters indicates that rainwater and snow melting are the primary recharge of a hydrothermal reservoir located at relative shallow depth (400–600 m) possibly connected to a second deeper (2–3 km) reservoir. Reactive magmatic gases are completely scrubbed by the hydrothermal aquifer(s), whereas interaction of meteoric waters at the surface causes a significant air contamination and dilution of the fluid discharges located along the creeks at the foothill of the Cerro Domuyo edifice. Thermal discharges located at relatively high altitude (~ 3150 m a.s.l.), namely Bramadora, are less affected by this process, as also shown by their relatively high R/Ra values (up to 6.91) pointing to the occurrence of an actively degassing magma batch located at an unknown depth. Gas and solute geothermometry suggests equilibrium temperatures up to 220–240 °C likely referred to the shallower hydrothermal reservoir. These results, confirming the promising indications of the preliminary surveys carried out in the 1980′s, provide useful information for a reliable estimation of the geothermal potential of this extinct volcanic system, although a detailed geophysical measurements is required for the correct estimation of depth and dimensions of the fluid reservoir(s). Fil: Tassi, F.. Consiglio Nazionale delle Ricerche; Italia. Università degli Studi di Firenze; Italia Fil: Liccioli, Caterina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos ; Argentina. Universidad de Buenos Aires. Facultad de Cs.exactas y Naturales. Departamento de Ciencias Geológicas. Grupo de Estudio y Seguimiento de Volcanes Activos; Argentina Fil: Agusto, Mariano Roberto. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina Fil: Chiodini, Giovanni. Istituto Nazionale Di Geofisica E Vulcanologia; Italia Fil: Vaselli, O.. Università degli Studi di Firenze; Italia Fil: Calabrese, S.. Istituto Nazionale Di Geofisica E Vulcanologia; Italia Fil: Pecoraino, G.. Università degli Studi di Firenze; Italia Fil: Tempesti, L.. Università degli Studi di Firenze; Italia Fil: Caponio, Cecilia. Istituto Nazionale Di Geofisica E Vulcanologia; Italia Fil: Fiebig, J.. Università degli Studi di Firenze; Italia Fil: Caliro, S.. Università degli Studi di Firenze; Italia Fil: Caselli, Alberto Tomás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-12-01 |