Sr Isotope, Major, and Trace Element Signatures in Karst Groundwaters

Natural and anthropogenic factors highly influence the concentration of major (Na, Mg, K, Ca) trace (Sr, Ba, Mn, Li) elements, anions (HCO3−, NO3−, SO42−, Cl−), Sr isotopic signatures. The current study identified signature in groundwaters from Southern Carpathians Apuseni Mountains karst areas Romania its relation to water’s chemistry. ranged between 16.5 658 µg/L, but most groundwaters, it was below 200 µg/L. A considerable spatial variation a low temporal variation, with slightly lower winter than spring, were observed. strong positive correlation Ca, Na indicated common source these elements. main dissolution carbonates, especially calcite, dolomite lesser extent. 87Sr/86Sr ratio 0.7038 0.7158. Generally, waters high moderate ratios carbonate dissolution, whereas samples concentrations suggested silicates.