Author: Ahmet TURAN
Publishing Date: 2010
E-ISSN: 2147-9364
Volume: 25 Issue: 4
ABSTRACT:
The Akören region is an interesting province with autochthonous Geyikdağı Unit, allochthonous Bozkır Unit and Neoautochthonous Unit. The Neoautochthonous Unitss overlie unconformable basement autochthonous and allochthonous tectonic unites. The aim of the study is to bring out stratigraphica and tectonical features of the region. In the study field works were carried out for warpping. Besideslitological charecteristics fauna contents contact relatives and paleoenvironmental approachesfor each units werw presented At the Akören and its surrounding area, the autochthonous rocks is knovn as the Geyikdağı Unit. It starts with shelf carbonates (Hacıalabaz limestone) Jurassic‐Early Cretaceous in age and passes to Late Cretaceous aged neritic carbonates (Saytepe formation) including abundant rudistes and foraminifera in the middle of the sequence. Pelagic fossiliferous, clayey, cherty limestone and marls (Alan formation) are seen at the upper parts of the autochthonous unit. The rocks of the Geyikdağı Unit are covered tectonocially by the Bozkır Unit. Tectonic slides of the Bozkır Unit comprise the Hatip ophiolitic melange Maestrihtian in age at the bottom, cherty‐clayey cabonates and radiolarites belonging to deep shelf edges of Boyalıtepe groups in Late Cretaceous in age in the middle and Triassic‐Jurassic aged massive neritic carbonates of Gencek groups at the top. Coarse clastics (Sille formation), lacustrine carbonates and claystones (Ulumuhsine formation) and dasitic‐andesitic rocks (Erenlerdağı volcanites) are related to Late Miocene‐Early Pliocene lacustrine transgression and volcanic activities. Then alluvial fan sediments foot (Topraklı formation) Late Pliocene‐Pleistocene in age and Holocene alluviums are the youngest sediments. Main folds and fractures in the region extend in NW‐SE direction. These tectonic lines are conformable with morphotectonic structure of the district. Therefore, these structural properties belong to the paleotectonic stage. There are also younger faults extending in ENE‐WSW and E‐W directions that cut off main folds and tectonic lines in the Akören region and they are neotectonical stuctures. The formations of the Akören area depression, which are subgrabens shapes are related to the deposition of fluvial‐lacustrinephanof mauntain and alluvial deposits in the depression areas formed by paleotectonic events and these young units were faulted by the tectonic proses.
Key Words: tectono‐strstigraphy, autochthonous Geyikdağı‐Bozkır and neoautochthonous units