Preliminary assessment of the geothermal potential of Rosario de la Frontera area (Salta,NW Argentina): Insight from hydro-geological,hydro-geochemical and structural investigations |
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| Institution: | 1. Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy;2. Department of Earth Sciences, Institute of Geochemistry and Petrology, ETH, 8092 Zurich, Switzerland;1. Departamento de Geología y Centro de Excelencia en Geotermia de los Andes (CEGA), Facultad de Ciencias Físicas y Matemáticas Universidad de Chile, Plaza Ercilla 803, Santiago, Chile.;2. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Córdoba, Argentina.;3. Dipartimento di Scienze Pure e Applicate, Università degli Studi di Urbino Carlo Bo, Via Ca'' Le Suore 2/4, Urbino, Italy |
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| Abstract: | This work is part of a project aimed to the development and application of hydrogeological, hydrogeochemical and geological methodologies for the study of the geothermal system of Rosario de La Frontera (NW Argentina).The surface thermal manifestations of this area, whose temperatures range from 22.6 to 92.6 °C, are mainly located in the northern sector of Sierra de la Candelaria anticline. This regional structure crops out between the provinces of Salta and Tucuman (NW Argentina), at the foothills of the central Andean retro-wedge.The present investigation focuses on hydrogeological and structural data, and isotopic compositions (18O, D and 3H) of thermal springs.Preliminary results allowed to define: i) the meteoric origin of spring water and their long (more than 50 years) residence time at depth, ii) a positive water balance, ranging between 2 and 4 millions of m3/yr, and iii) a conservative geothermal reservoir volume of about 39 km3, iv) a geothermal potential with Er = 5.6*1018 J and Ef = 0.8*1018 J. |
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| Keywords: | Andes retrowedge Geothermal fluids Water balance Stable isotopes NW Argentina Reservoir |
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