Akademik Veri Yönetim Sistemi
Yerbilimleri/ Earth Sciences, cilt.44, sa.1, ss.22-63, 2023 (Scopus)
The Southeastern Anatolian Orogeny consists of three main structural parts from north to south; the Nap zone, the Imbrike zone and the Arabian Platform. The Aksu-Samsat profile line and its map area contain parts of the Nap region and the Arabian Platform of the orogeny. The profile line includes local and regional scale unconformities and different sizes of folds and faults. Most of the faults are thrust and reverse faults; additionally, some normal faults control the evaluation of basin deposits and/or cut them and young strike-slip faults that have affected earlier lithologies and structures. The folds showing different geometries are commonly composed of asymmetrical, overturned and recumbent folds. Five deformation stages have been identified in the region, indicating paleotectonic and neotectonic regime periods; these are the upper Campanian-lower Maastrichtian, Upper Paleosen – Lower Eosen, late Middle Eocene, late Early Miocene and Pliocene-Quaternary stages, respectively. While the upper Campanian-lower Maastrichtian stage is mainly defined by the thrusting over rocks of Koçali ophiolite melange and Karadut complex rocks along with the Koçali and Karadut decollement faults. Upper Paleosen – Lower Eocene stage is related to the northern region uplift, erosion and the and unconformable depositon of Gercüş formation. The late Middle Eocene phase is characterized by folding and faulting of the Midyat group and earlier sequences based on the regional compressional regime. The late Early Miocene stage is characterized by thrusting the metamorphites and the Maden complex over the young rock units (Silvan group) of the platform along the Aksu fault zone and widespread deformation of lithologies in Early Miocene and pre-Miocene. The Pliocene-Quaternary deformation stage affecting the area is particularly typical with the development of left-lateral strike-slip faults. The stratigraphic evaluation and style of deformation in the study area and its vicinity might correlate with other regions of the orogeny.