Assessment of Isotopic Characterization (δ18O, δ2H and 3H) and Hydrochemical Processes of the Springs in Kumalar Mountain Region (Afyonkarahisar, Turkey)

In this study, the recharge processes of the springs in the Sandikli and Suhut basins were investigated by stable isotopes, oxygen-18 (δ 18 O), deuterium (δ 2 H or δD) and tritium ( 3 H) analysis. The study area consists of volcanics, limestones and clastic rocks. There is a large number of water sources discharged from volcanic origin rocks and clastic limestones in this region. The dominant ions in the springs in the region are Ca 2+ , Mg 2+ and HC . The δ 18 O and δ 2 H values of the spring waters ranged between –8.0 and –10.8, –53.0 and –69.6 in September-2017, between –7.9 and –10.8, –512.0 and –69.6 in April-2018 respectively. The positions of samples on the δ 18 O–δ 2 H diagrams indicate the meteoric origin. The maximum tritium contents of the water samples 5.4 TU in September-2017 and 5.2 TU in April-2018. Deuterium excess (d-excess) values of spring waters were between 9.1 and 17.3‰ in September-2017, between 8.4 and 18.0‰ in April-2018.