Hydrogeological, Hydrogeochemical and Isotope Geochemical Features of the Geothermal Waters in Kurşunlu, Western Anatolia, Turkey

Abstract

The geothermal waters in Kurşunlu and environs within the continental rift zone of the Gediz in the Menderes Massif can be considered as Na-HCO3 type waters. In these waters, we describe Na+K>Ca>Mg as dominant cations and HCO3>Cl>SO4 as dominant cations. The results of geochemical thermometers (quartz, Na-K and Na-K-Ca) show reservoir temperatures 120°C in Çamurlu and 148-205°C which correspond with calculations based on SiO2 versus enthalpy mixing model and enthalpy versus Cl mixing model of the geothermal waters in Kurşunlu and Çamurlu. The mixing ratio of geothermal waters with ground waters can be calculated due to indicators such as Cl-, B, Li, and temperatures; there is a mixing ratio of 42,5 percent geothermal waters and 57,5 percent groundwaters in Çamurlu. In Kurşunlu, we have calculated a mixing ratio of 83 percent geothermal waters and 17 percent groundwaters.