Abstract: Karalar barit e - galena deposits are the typical examples of the carbonate hosted barite - galena, deposits oc curedin the Central Tauride Belt Ore deposits (Büyük and Boy alık Mines) of the area occured in the limestones of thePermian Bıçkıcı Formation as ore veins along the fault zones which are discordant to the bedding planes.Microscopic and XRD studies show that the ore deposits mainly contain barite (80 - 85 %) and galena (10 - 15 %)and small amounts of sphalerite, pyrite, fahlerz, limonite, quartz and calcite. Barit e s were occurred during the earlierepisode of mineralization and mylonitized before than the galena formation. The measurements of TfM, T m ICE an(^ ^H during the fluid inclusion studies indicate that the ore deposits of thearea were developed by hydrothermal fluids with following characteristics; the presence of the salts of CaCl2 andMgCİ2 which indicate that the fluids are of sea water o rig ine or circulated in the marine sediments, the salinity of thefluids were relatively high and their temperature were low during the crystallization of barites (earlier episode ofmineralization), and the salinity of the fluids decreased while their temperatures increased during the crystallizationof sulfide m inerals {later episode of m ineralization).The disharmonies between the salinity and temperature of the fluids during the early and later episode ofmineralization may be explained as; the fluids were siuficial o rig ine (either meteoric or sea water) rather thanmag mat ic origine and the fluids which circulated in the shallow depth were sligtly warmed, dissolved the Ba andsulfate from the marinal sediments of the basement and transported to the mineralization environment during theearly episode, while the deeply circulated fluids were heated up to the higher temperatures, dissolved the Pb, Zn andother elements from the basement and reached to the environment during the later episode of mineralization.