ÇAĞRILI KONUŞMALAR / KEYNOTES Invited Speeches ... - TPJD

An Example of Siliciclastic, Carbonate and Evaporite Transitions: Sivas Eocene
Basin, Central Anatolia
Özgen Kangal 1 , Baki Varol 2 , Haluk Temiz 1 , Andre Poisson 3 , Levent Karadenizli 4
1 Cumhuriyet University, Geological Engineering Department, Sivas
2 Ankara University, Faculty of Engineering, Department of Geological Engineering, Ankara
3 24, Rue De L’orme Marcoussis Paris, France
4 General Directorate of Mineral Research And Exploration Department of Geological
Investigations, Ankara
Sivas Tertiary Basin is one of the most important basins in Central Anatolia. The closure of the
northern branch of Neo-Tethys Ocean during the Early Tertiary is determinant phenomenon in
the evolution of this area like other Tertiary basins in the Central Anatolia, such as Çankırı-Çorum,
Haymana-Polatlı, Tuz Gölü and Ulukışla Basins. The basin is extended to the northeast-southwest
direction, and, narrowed and closed in the east. The Sivas basin is bordered by the Pontide belt in
the north, Tauride belt in the south and Kırşehir Massif in the west. The Eocene deposits of Sivas
basin show important environmental and lithological diversities reflecting evolution of a basin
developed on suture zone. Deposition systems are possessed environmental characteristics that
are defined by the assemblages of siliciclastic, carbonate and evaporate facies. Especially within
the coastal belt, these transitional environments that are formed by siliciclastic and carbonate
assemblages are progressed towards offshore depending on the changing of the sea level.
The aim of this study is examination of vertical and horizontal relationships in such different
environments, and evolution of the basin during Eocene.
Keywords: Siliciclastic, Carbonate, Sivas basin, Eocene
123