Bülent KAYPAK, Korhan ESAT, Veysel IŞIK, Gürol SEYİTOĞLU, Oktay PARLAK, İlker İLERİ, Bahadır AKTUĞ, Gerçek SARAÇ, Baki VAROL, Levent KARADENİZLİ, Nizamettin KAZANCI, Şevket ŞEN

A Late Pliocene - Quaternary pinched crustal wedge in NW central Anatolia, Turkey: A Neotectonic structure accommodating the internal deformation of the Anatolian plate

Sağ yanal Kuzey Anadolu Fayı Zonu ve Kırıkkale-Erbaa Fay Zonu tarafından yaratılan KB-GD sıkışma sonucu Çankırı havzasının batı kenarında Neo-Tetis kenet zonu tektonik kama şeklinde yeniden hareketlenmiştir. Eldivan-Elmadağ Kıstırılmış Tektonik Kaması (EKTK) adı verilen bu neotektonik yapı, bindirme faylı doğu kenarına ve normal faylı batı kenarına sahip olup, Geç Pliyosen’den beri 2.8 km’lik kısalmayı karşılamaktadır. Bu sonuç Anadolu levhasının GB’dan çekilmesi modelinden ziyade doğudan itilmesi modeli ile uyumludur. Güncel olarak aktif bir yapı olan EKTK, Orta Anadolu’nun özellikle başkent Ankara ve Çankırı’nın deprem riski değerlendirilmesinde potansiyel kaynak olarak algılanmalıdır.

KB Orta Anadolu’da Geç Pliyosen – Kuvaterner kıstırılmış kabuksal tektonik kama: Anadolu levhasının iç deformasyonunu üstlenen bir neotektonik yapı

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 right lateral North Anatolian Fault Zone and the Kırıkkale – Erbaa Fault Zone. This neotectonic structure, the Eldivan-Elmadağ pinched crustal wedge-(EPCW), having a thrusted eastern and normal faulted western margin, has accommodated a 2.8 km shortening since the Late Pliocene. This result accords with the model in which the Anatolian plate is squeezed from the east rather than pulled from the southwest. The EPCW, a recently active structure, should be regarded as a potential source in the earthquake risk assessment of central Anatolia, particularly for the capital city Ankara and for Çankırı.

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