Özkan, Ali Müjdat2024-07-232024-07-232024978-625-367-700-8https://hdl.handle.net/20.500.13091/5917This study aims to determine the petrographic characteristics of dolostone and limestones belonging to the Dedebeleni Formation (Jurassic), located around Beyreli Village of Hadim District, southwest of Konya. The Jurassic-aged Dedebeleni Formation begins with limestone at the base, continues with limestone-mudstone and limestone-dolomitic limestone alternation towards the top, passes into dolostone-limestone alternation towards the middle parts, and ends with limestone in the upper part. Dedebeleni Formation carbonates according to their textural characteristics: They were observed to be in the form of wackestone, dolosparite, packstone, and crystalline limestone. In Dedebeleni carbonates taken from MSS-A, 0-26% fossil, 0-25% pellet, 0-5 intraclast, 3-100% sparite and 0-63% micrite were determined. Dolomite crystals in the form of euhedral, subhedral, and anhedral grains with sizes ranging from micro to large were observed in thin sections of Dedebeleni carbonates. Dedebeleni carbonates taken from MSS-B contain 14-23% fossil, 9-21% pellet, 8-20% sparite and 41-63% micrite. Again, thin sections of Dedebeleni carbonates taken from ÖSK-B, euhedral, zoned-subhedral, and anhedral dolomite crystals ranging in size from medium crystalline to coarse were observed. In addition, partially dolomitized micritic limestone, partially dolomitized bio-mold, organic matter wackestone, and sparicalcitic-filled ostracod packstone were observed in the Dedebeleni limestones. Unimodal, very fine–fine crystalline planar-s dolomites; small crystal sizes (<60 μm) indicate supratidal to subtidal environments. Fine crystal size may develop as early diagenetic dolomite or as a result of concurrent neomorphism or early replacement of original peritidal carbonate mudstones. Dolomite often selectively replaces fine crystalline calcium carbonate. Unimodal, medium-coarse crystalline subhedral mosaic dolomites; suggest mid-late diagenetic replacement dolomite. The preservation of the original depositional textures and the coarse crystal size indicate a major, possibly long-term, dolomitization event. This type of dolomite mineral development has been highlighted as being of late burial origin. Medium-large crystalline euhedral mosaic dolomites; have been shown as evidence of pre-dolomitization texture. Because the crystal size in individual mosaics is unimodal, it is thought that the nucleation areas for dolomite are homogeneously distributed. The fact that dolomite crystals share compatible boundaries demonstrates that they were formed in situ. They grow simultaneously to form matching crystal boundaries and develop euhedral mosaics by the combined growth of zones in adjacent crystals. In summary, dolostones of the Dedebeleni Formation were formed early diagenetically in a shallow burial environment and late diagenetically in a medium-deep burial environment, while limestones were deposited in a shallow marine (carbonate shelf) environment.eninfo:eu-repo/semantics/openAccessBeyreli-HadimDedebeleni FormationDolomitic LimestonesJurassicPetrographyConference Object