Caracterización hidroquímica y análisis de los estados de equilibrio termodinámico en aguas termominerales de Alhama de Murcia (Murcia, Espana)
DOI:
https://doi.org/10.3989/egeol.93491-2337Keywords:
hydrogeochemistry, thermomineral waters, detrital aquifer, neotectonic, geochemical modeling, geothermometersAbstract
The principal physico-chemical characteristics of sorne thermomineral waters of Alhama de Murcia detrital aquifer are studied. The waters show a temperature between 26-41 °C and they are calcium-magnesium chloride-sulphate type. The origin of ions has a direct relationship with the dissolution of evaporitic sulphate-chloride salts, carbonatic and silica rocks, agricultural contamination processes and possibly ore-deposits. Mixing processes with cold waters possibly also occur. By SOLMINEQ.88 program the thermodinamic equilibrium conditions in surface are studied; the samples are saturated in quartz, chalcedony and albite. A great part of the waters are also saturated in calcite, aragonite, dolomite, gypsum, barite and magnesite. Finally, the waters are undersaturated in cristobalite, anhydrite and fluorite. Conventional chemical geothermometers yield a broad range of temperatures. Both, calcite-dolomite and anhydrite-fluorite geothermometers was applied to two samples with anomalous results. The saturation index modeling, at a series of growing temperatures, shows an approach equilibrium with quartz, chalcedony, albite, sanidine, gipsum, anhydrite, gibbsite and halloisite between 80-110 °C. A spread in the apparent equilibration temperatures deduced from two metodology, should be a consequence of dilution by surface waters, effects of re-equilibration of minerals with waters and CO2 loss. Temperature and chemical composition of the waters shows a thermal anomaly directly related with the tectonic activity in the area.
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Published
1993-04-30
How to Cite
Cerón García, J. C., Pulido Bosch, A., & Padilla Benítez, A. (1993). Caracterización hidroquímica y análisis de los estados de equilibrio termodinámico en aguas termominerales de Alhama de Murcia (Murcia, Espana). Estudios Geológicos, 49(1-2), 49–61. https://doi.org/10.3989/egeol.93491-2337
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