Hydrogeological features and assessment of temperature in primary collector of the thermomineral water from the hydrogeothermal system of the Spa Kežovica and L'dži – Štip

Abstract

This paper presents the hydrogeological features of the wider environment of hydrogeothermal system of the spa Kežovica and L’dži, and based on the chemical composition of thermal mineral water analyzed in the period from 1977 to 2016, with the help of hydrogeothermometers has made an estimate of the temperatures in the primary collector of these water. According to the structural type of porosity of the rocks present in the wider environment of the investigated field have been developed: boundary type of aquifers, fissure type of aquifers and waterless rocks. According to the hydrodynamic characteristics of the water level in this system there are aquifers with free level and subartesian aquifers. Thermomineral water from the hydrogeothermal system Kežovica and L’dži origin of fractured type of aquifer with subartesian pressure formed in tectonically cracked Štip granite. With the help of hydrogeothermometer on chalcedony, Na–K and Na–Li, is determined temperature in the primary collector of thermоmineral water which are ranging from 90 to 120 °C.