HYDROCHEMISTRY OF KARST SPRINGS FROM TWO CARBONATIC UNITS IN ZAGROSIDES OF IRAN

119 Karst Springs, all with electric conductivity of less than 500 um/cm, discharging two carbonatic aquifers in Zagrosides of Iran are chosen and studied. The results indicate that the lithology of each Unit is well reflected in the chemistry of springs and the overall mineralogical composition of the aquifer can successfully be reconstructed from the hydrochemistry of the springs using a mass balance approach. The comparison of the chemistry of springs reveals that the significant difference are due to the dolomitic nature of one of the studied aquifers.