New geochemical and isotopic insights to evaluate the geothermal resource of the hydrothermal system of Rosario de la Frontera (Salta, northern Argentina)

Autor: Chiodi A.[1], Tassi F.[2, Baez W.[1], Maffucci R.[4], Invernizzi C.[5], Giordano G.[4, Corrado S.[4], Bicocchi G.[2], Vaselli O.[2, Viramonte J.G.[1], Pierantoni P.P.[6]
Přispěvatelé: Chiodi, A., Tassi, F., Báez, W., Maffucci, R., Invernizzi, C., Giordano, Guido, Corrado, Sveva, Bicocchi, G., Vaselli, O., Viramonte, J. G., Pierantoni, P. P., A., Chiodi, F., Tassi, W., Báez, R., Maffucci, C., Invernizzi, G., Giordano, G., Bicocchi, O., Vaselli, Jg, Viramonte, Pp, Pierantoni
Rok vydání: 2015
Předmět:
Zdroj: Journal of volcanology and geothermal research 295 (2015): 16–25. doi:10.1016/j.jvolgeores.2015.03.001
info:cnr-pdr/source/autori:Chiodi A.[1], Tassi F.[2,3], Baez W.[1], Maffucci R.[4], Invernizzi C.[5], Giordano G.[4,5], Corrado S.[4], Bicocchi G.[2], Vaselli O.[2,3], Viramonte J.G.[1], Pierantoni P.P.[6]/titolo:New geochemical and isotopic insights to evaluate the geothermal resource of the hydrothermal system of Rosario de la Frontera (Salta, Argentina)/doi:10.1016%2Fj.jvolgeores.2015.03.001/rivista:Journal of volcanology and geothermal research/anno:2015/pagina_da:16/pagina_a:25/intervallo_pagine:16–25/volume:295
ISSN: 0377-0273
2700-3000
DOI: 10.1016/j.jvolgeores.2015.03.001
Popis: In this study, the chemical and isotopic composition of thermo-mineral springs from the Rosario de la Frontera hydrothermal system was used to construct a conceptual model describing the source regions the thermal fluids and the chemical-physical processes controlling the chemistry of waters and dissolved gases during their underground circulation. The main hydrothermal reservoir, hosted within the Cretaceous Pirgua Subgroup deposits, is fed by meteoric water and shows a Na-HCO3 composition produced by water-rock interactions involving sedimentary formations mostly consisting of conglomerates and sandstones, which are interbedded with alkaline volcanic rocks and shales and limestone deposits. This aquifer also receives significant contributions of crustal CO2 and He from mantle degassing, the latter being likely favored by the regional tectonic assessment that is characterized by a deep detachment (at about 10km depth) in the basement of the Santa Bárbara thick-skinned thrust system and a thinned lithosphere. The uprising thermal fluids mix with a relatively high salinity Na-Cl dominated aquifer produced by the interaction of meteoric water with the Tertiary Anta Formation evaporite. The temperatures of the hydrothermal reservoir, estimated with water geothermometers, are up to 130°C, which are consistent with the thickness of the hydrothermal circuit (2700-3000m) and the relatively high local geothermal gradient (~40°C/km). These results suggest that the heat stored in the fluid phase of RFHS is up to ~1×1018J, a value significantly higher (20%) than that previously estimated assuming an average reservoir temperature of 90°C. Fil: Chiodi, Agostina Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones en Energía no Convencional. Universidad Nacional de Salta. Facultad de Ciencias Exactas. Departamento de Física. Instituto de Investigaciones en Energía no Convencional; Argentina Fil: Tassi, F.. University of Florence. Department of Earth Sciences; Italia. Institute of Geosciences and Earth Resources; Italia Fil: Baez, Walter Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones en Energía no Convencional. Universidad Nacional de Salta. Facultad de Ciencias Exactas. Departamento de Física. Instituto de Investigaciones en Energía no Convencional; Argentina Fil: Maffucci, R.. Università di Roma; Italia Fil: Invernizzi, C.. Institute for Dynamics of Environmental Processes; Italia Fil: Giordano, G.. Università di Roma; Italia. Institute for Dynamics of Environmental Processes; Italia Fil: Corrado, S.. Università di Roma; Italia Fil: Bicocchi, G.. University of Florence. Department of Earth Sciences; Italia Fil: Vaselli, O.. University of Florence. Department of Earth Sciences; Italia. Institute of Geosciences and Earth Resources; Italia Fil: Viramonte, Jose German. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones en Energía no Convencional. Universidad Nacional de Salta. Facultad de Ciencias Exactas. Departamento de Física. Instituto de Investigaciones en Energía no Convencional; Argentina Fil: Pierantoni, P.P.. University of Camerino; Italia
Databáze: OpenAIRE
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