The study area is located in the southern part of the Tuz Gölü in central Anatolia, Turkey. The investigated evaporates were taken from ten drill holes depths ranging from 650 to 1100 meters in Miocene to Quaternary deposits. The determined evaporite minerals are formed from the sulfate group minerals (gypsum, anhydrite, glauberite and partially bloedite), carbonate minerals (dolomite and partially magnesite, rarely calcite), and chloride group (halite and rarely polyhalite in the study.

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... l and/or non-evaporitic mineral are composed of quartz, feldspar, mica, and rarely zeolite minerals. The purpose of the study is to determine the mineral types and contents at the basin in the lateral and vertical direction. The mineralogical compositions of the samples were investigated using X-ray diffraction, optical microscopy, and scanning electron microscopy methods. In optical microscopic examinations, distribution of these minerals and their frequency was determined, their textural properties and their conversion to each other were also defined. In particular, the thickness of the halite-bearing sediments can reach several hundred meters, partly even if the halite beds intercalated with glauberite and/or anhydrite layers. Carbonate-halite and sulphate minerals are usually precipitated with each other in succession. Carbonate sedimentation has been reduced or has not occurred at the levels of sedimentation of halite precipitated layers. Carbonate minerals are mostly accompanied by sulphate group minerals, halite and clay minerals. Calcite is usually found in the upper parts of the drillings. Dolomite-magnesite and dolomite-calcite mineral couples can be found together in the drillings. While dolomite is more common in moderate levels in drillings, magnesite is found in lower levels and is less prevalent. Sulphate minerals are the most common mineral group in the basin. The most common sulphate minerals are gypsum, anhydrite and glauberite. Along with these minerals, bloedite, epsomite, loveite, eugasterite and konyaite have been determined at various levels.