Determination of hydrogeochemical properties of geothermal water of Tuzlukcu-Akşehi̇r (Konya) region

In this research, hydrogeochemistry and usage properties of 3 thermal water and 7 cold water samples located in and around Tuzlukçu (Konya) region were investigated. The Loras and the Halıcı formations (Kurşunlu Limestone member) are the reservoir rock for the geothermal waters. According to the analysis results; it was determined that thermal water samples were Na-Ca-HCO3 and Na-HCO3-SO4, cold water samples were Ca-Mg-HCO3 and Mg-Ca-HCO3 type waters. The water-rock interaction with carbonate and silicate rocks are the most important parameters that are effects the current chemical composition of the waters. According to the oxygen (δ18O), deuterium (δ2H) and tritium (3H) isotope results, it was determined that the water samples are of meteoric origin and the thermal water samples are older than the cold water samples. In the δ13C isotope analysis, it was observed that the carbon in the waters is a mixture of carbon sources of different origins. The reservoir rock temperatures of the thermal water samples were calculated in the range of 70-100°C. Considering the usage characteristics, it was determined that some samples were exposed to nitrite pollution and the other samğles were suitable for irrigation and drinking in terms of other chemical contents analyzed.