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Abstract:

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). © 2016 Elsevier B.V.

Registro:

Documento: Artículo
Título:The hydrothermal system of the Domuyo volcanic complex (Argentina): A conceptual model based on new geochemical and isotopic evidences
Autor:Tassi, F.; Vaselli, O.; Tempesti, L.; Caponi, C.
Filiación:Department of Earth Sciences, University of Florence, Via La Pira 4, Florence, 50121, Italy
CNR-IGG Institute of Geosciences and Earth Resources, Via La Pira 4, Florence, 50121, Italy
Instituto de Paleobiología y Geología de la Universidad Nacional Rio NegroRio Negro, Argentina
Istituto Nazionale di Geofisica e Vulcanologia, Via D. Creti 12, Bologna, 40128, Italy
Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Dipartimento di Scienze della Terra e del Mare, Università di Palermo, Palermo, Italy
Istituto Nazionale di Geofisica e Vulcanologia, Sezione di PalermoVia Ugo la Malfa 153, Palermo, 90146, Italy
Institut für Geowissenschaften, Goethe-Universität, Altenhöferallee 1, Frankfurt am Main, 60438, Germany
Istituto Nazionale di Geofisica e Vulcanologia “Osservatorio Vesuviano”, Via Diocleziano, Napoli, 328-80124, Italy
Palabras clave:Alternative energy source; Domuyo volcanic complex; Geothermal system; Geothermometry; Hydrothermal fluid; Air; Aquifers; Chlorine compounds; Geochemistry; Geothermal energy; Geothermal fields; Geothermal wells; Groundwater pollution; Isotopes; Surface discharges; Volcanoes; Alternative energy source; Geothermal systems; Geothermometry; Hydrothermal fluids; Volcanic complex; Hydrochemistry; alternative energy; geochemistry; geothermal system; geothermometry; hydrothermal system; isotopic composition; Argentina; Neuquen; Patagonia
Año:2016
Volumen:328
Página de inicio:198
Página de fin:209
DOI: http://dx.doi.org/10.1016/j.jvolgeores.2016.11.003
Título revista:Journal of Volcanology and Geothermal Research
Título revista abreviado:J. Volcanol. Geotherm. Res.
ISSN:03770273
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03770273_v328_n_p198_Tassi

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Citas:

---------- APA ----------
Tassi, F., Vaselli, O., Tempesti, L. & Caponi, C. (2016) . The hydrothermal system of the Domuyo volcanic complex (Argentina): A conceptual model based on new geochemical and isotopic evidences. Journal of Volcanology and Geothermal Research, 328, 198-209.
http://dx.doi.org/10.1016/j.jvolgeores.2016.11.003
---------- CHICAGO ----------
Tassi, F., Vaselli, O., Tempesti, L., Caponi, C. "The hydrothermal system of the Domuyo volcanic complex (Argentina): A conceptual model based on new geochemical and isotopic evidences" . Journal of Volcanology and Geothermal Research 328 (2016) : 198-209.
http://dx.doi.org/10.1016/j.jvolgeores.2016.11.003
---------- MLA ----------
Tassi, F., Vaselli, O., Tempesti, L., Caponi, C. "The hydrothermal system of the Domuyo volcanic complex (Argentina): A conceptual model based on new geochemical and isotopic evidences" . Journal of Volcanology and Geothermal Research, vol. 328, 2016, pp. 198-209.
http://dx.doi.org/10.1016/j.jvolgeores.2016.11.003
---------- VANCOUVER ----------
Tassi, F., Vaselli, O., Tempesti, L., Caponi, C. The hydrothermal system of the Domuyo volcanic complex (Argentina): A conceptual model based on new geochemical and isotopic evidences. J. Volcanol. Geotherm. Res. 2016;328:198-209.
http://dx.doi.org/10.1016/j.jvolgeores.2016.11.003