Chemical composition of the thermomineral waters of Josanicka Banja Spa as an origin indicator, balneological valorization and geothermal potential/Hemijski sastav termomineralnih voda Josanicke Banje Kao indikator porekla, balneoloske valorizacije i geotermalnog potencijala

The chemical composition of the groundwater is directly dependent on the geological structure, hydrogeological and hydrochemical characteristics and as such it represents an output result of all the factors and processes which take place in the environment within which they were formed. The chemical composition of thermomineral waters often represents a crucial factor in determining the origin, balneological valorization and geothermal potential of the resources. This paper presents the analysis of origin, belneological valorization and geothermal potential of Josanicka Banja Spa, on the basis of the results gained through making the analyisis of chemical contents of the thermomineral waters which occur in the area. The ratio of concentrations of specific chemical components in the thermomineral waters of Josanicka Banja has served as the basic tool for ascertaining the origin of these waters. On the basis of the analysis of the main anion-cation and gas compositions as well as the contents of specific micro-components, a balneological valorization of these resources has been carried out. Apart from that, this paper also presents the calculation of the expected temperatures in the primary geothermal reservoir, which was carried out on the basis of the results of chemical analysis of thermomineral waters that occur in the area. Geothermal potential of about 4 MWt and significant contents of balneologically active components of the chemical composition of these waters, open up a possibility for their multi-purpose use, which is also presented in the paper. Keywords: thermomineral waters, geothermal potential, balneology, massif of Kopaonik, Josanicka Banja Spa, multipurpose use. Na osnovu izvedenih analiza hemijskog sastava termomineralnih voda Josanicke Banje utvrdeno je da su iste genetski povezane sa masivima kristalastih stena, te da je formiranje fizicko-hemijskog i gasnog sastava termomineralnih voda vezano za mlade dubinske magmatske i njima izazvane termometamorfne procese. Termomineralne vode Josanicke Banje pripadaju grupi azotnih malomineralizovanih silicijumskih termomineralnih voda atmosferskog porekla. Koncentracija silicije u podzemnim vodama Josanicke Banje karakteristicna je za termomineralne vode, a odnos silicije sa ostalim elementima ukazuje da je hemizam termomineralnih voda u vezi sa raspadanjem silikata i da u dubljim delovima lezista dolazi do jonske izmene. Vezu izmedu hemizma i raspadanja silikata potvrduje i odnos odnos koncentraci