Türkiye Jeoloji Bülteni

A Late Pliocene-Quaternary Pinched Crustal Wedge in NW Central Anatolia, Turkey: A Neotectonic Structure Accommodating the Internal Deformation of the Anatolian Plate

Abstract: The Neo-Tethyan suture zone in the western margin of the Çankırı basin (NW central Anatolia, Turkey)has been reactivated as a pinched crustal wedge due to a NW – SE compression created by the rightlateral North Anatolian Fault Zone and the Kırıkkale – Erbaa Fault Zone. This neotectonic structure, theEldivan-Elmadağ pinched crustal wedge-(EPCW), having a thrusted eastern and normal faulted westernmargin, has accommodated a 2.8 km shortening since the Late Pliocene. This result accords with themodel in which the Anatolian plate is squeezed from the east rather than pulled from the southwest. TheEPCW, a recently active structure, should be regarded as a potential source in the earthquake riskassessment of central Anatolia, particularly for the capital city Ankara and for Çankırı.