Abstract: Central Anatolian basins, which are boundend by the Pontides in the north and the Kırşehir and Torostectonic blocks to the south-southeast, geologically important structures in the region with sediment accumulationsup to the present day to comprises subduction to collusion process (Senezoyik) in northern segment of the NeotethysOceanic litosphere beneath to the Pontides. Within the scope of this study, these depositional structures, which aregeographically located in Ankara and in the vicinity and classifield as the Kırıkkale-Bala, Alcı-Orhaniye, Haymanaand Tüzgölü basins in litreture. Although sedimentary deposition stages, lithological properties and sourcecharacteristics show great similarities, they are considered as different basins in terms of their today’s geographicalpositions. In this study, these basins were examined with gravity and magnetic methods and information abouttheir structures in the depths of the earth were obtained. Especially, the Haymana and Kırıkkale-Bala basins werefound to have the thickest sediment depositions in the region (about 8-9 km). The deep structures of the basins weremodeled by gravity method and their possible connections with each other were determined. In particular, it has beentried to explain the ongoing debates in the literature that Tuzgölü and Haymana basins were the same sedimentarybasin in the past. Within the basin areas, no clear change in gravity data but high positive magnetic anomalies can be associated with the presence of volcanic units (Neogene) near beneath the surface. In addition, important datarelated to the evolution of tectonic deformation of the İAESZ on these basins have been revealed. The information ofthe basins with this depth provides new perspective related with the geodynamic evolution of the region, especiallyconsidering the tectonic blocks they surround