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A geochemical and geophysical approach to derive a conceptual circulation model of CO2-rich mineral waters: A case study of Vilarelho da Raia, northern Portugal

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Veröffentlicht in:Hydrogeology Journal vol. 9, no. 6 (Dec 2001), p. 584
1. Verfasser: Marques, J J.
Weitere Verfasser: Santos, Monteiro F, Graça, R R., Castro, R R., Aires-Barros, L L., Mendes Victor L
Veröffentlicht:
Springer Nature B.V.
Schlagworte:
Portugal
Geochemistry
Geophysics
Aquifers
Groundwater flow
Models
Mineralogy
Hydrology
Meteoric water
Carbon dioxide
Circulation
Mineral waters
Minerals
Environmental
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Abstract:The Vilarelho da Raia-Chaves region, located in northern Portugal adjacent to the Spanish border, is characterized by both hot and cold CO2-rich mineral waters issuing from springs and drilled wells. The present paper updates the conceptual circulation model of the Vilarelho da Raia cold CO2-rich mineral waters. Vilarelho da Raia mineral waters, dominated by Na and HCO3 ions, have formed mainly by interaction with CO2 of deep-seated mantle origin. The δ ^sup 18^O, δ ^sup 2^H and ^sup 3^H values indicate that these waters are the result of meteoric waters infiltrating into Larouco Mountain, NW of Vilarelho da Raia, circulating at shallow depths in granitic rocks and moving into Vilarelho da Raia area. The conceptual geochemical and geophysical circulation model indicates that the hot and cold CO2-rich mineral waters of Chaves (76 °C) and Vilarelho da Raia (17 °C) should be considered manifestations of similar but not the same geohydrological systems.[PUBLICATION ABSTRACT]
ISSN:1431-2174
1435-0157
0941-2816
DOI:10.1007/s10040-001-0162-8
Quelle:Science Database