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DOI

10.19076/mta.96271

Abstract

The basement units of the studied region are Paleozoic-Mesozoic Keban metamorphic and Upper Cretaceous Elazığ magmatics. As a result of tectonic events caused by final collision in Middle Maastrichtian, all these basement units were juxtaposed, uplifted, eroded and acted as source areas for the Upper Cretaceous-Paleogene basins. Upper Cretaceous-Paleogene units were sampled systematically in order to determine their ages and lithologies. These marine units were identified as Harami, Seske and Kırkgeçit formations based on new age data and their stratigraphic positions. Other units of the study area are Upper Oligocene-Lower Miocene Alibonca formation and Pliyosen Karabakır formation. Harami formation, late Maastrictian-Thanetian in age, comprises grainstone with sandstone intercalation at the base and white colored marble-like limestone at the upper part. Seske formation late Cuisian - early middle Lutetian aged consists of pebblestone, including pebbles from Elazığ magmatics and Harami formation. The upper part of the unit comprises carbonate cemented sandstone with plenty of nummulites and ophiolitic fragments. Kırkgeçit formation, early Bartonian-early Chattian in age, comprises sandstone-siltstone-limestone intercalation. Alibonca formation, Late Oligocene-Early Miocene in age, consists of pebblestone at the lowest part, reefal limestone in the middle and clayey limestone with limestone interlayers in the upper part of the sequence. Karabakır formation is consists of pebblestone-mudstone and locally pyroclastic rocks and lava intercalations. Volcanites comprise basalt with sedimentary interbeds and pyroclastics. It has lateral and vertical transitions with the sedimantary lithologies of Karabakır formation. There are no data to date the formation; however, based on its stratigraphical position and its lateral equivalents, it is assumed to be Pliocene. In the studied area, macrotectonic events were experienced during the Maastrictian, Early Eocene, Middle Eocene (middle-upper Lutetian), Middle Oligocene, Middle?-Upper Miocene and Latest Pliocene. During the last deformation phase, the Anatolian plate began moving westward which is bounded in the E.SE by the East Anatolin Fault. In the study area Pertek fault started to move as a rigth-lateral strike-slip fault.

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