Abstract: The Mortaş bauxite deposit is on the Western Taurus mountains of Turkey. It occurs along the unconformity between Lower and Upper Cretaceous limestones. The deposit is mainly boehmitic. In addition to boebmite,diaspore, gibbsite, kaolinite, montmorillonite, hematite, goethite, and anatase are also present in lesser amounts. Thedeposit also contains mineraloids such as alumogels, siderogel, and hematogelite.Among chemical constituents Al2O3 TiO2, and L.O.I have high positive Al2O3. SiO2 has differe correlation and showsimilar areal variation Fe2O3 is negatively correlated with Al2O3. SiO2 has a diffrent distribution pattern from the aforesaidchemical constituents. The mineralogical and chemical data indicates that the bauxite of the Mortaş deposit is derived fromlimestone.