Author: Ahmet TURAN, Fikret KURTMAN, İhsan SEYMEN
Publishing Date: 2007
Volume 22 Issue 1-2
In the study area located Central Taurus Belt, autochthonous Geyikdağı and lower allochthonous Bozkır, middle allochthonous Bolkardağı and upper allochthonous Aladağ tectonic units of the Taurus Orogenic Belt crop out. The each one of the tectonic slices comprises individual sequences formed in different paleogeographic environments having important distinctions. Hadim region was covered by shallow marine that resulted deposition of dolomite, dolomitic limestone and bioclastic limestones during the Early-Middle Cambrian. The study area was a basin in which were deposited marine detritic sediments including conodont and graptolitic shales during the Late Cambrian-Ordovician. Late Ordovician-Early Devonian aged formations were not observed in the study area. A shallow sedimentation environment, in which were deposited detritic sediments intercaleted carbonate rocks with abundant fossils in the late Devonian-Carboniferous period. In the region, reefal-lagoonar shallow carbonate shelf conditions preserved during the Permian. Early Triassic rocks are represented with stromatolitic-oolitic limestone and clayey limestone-marl-shale facieses. Flysch sequences were formed in the Middle Triassic including sandy and muddy facieses. The region, repeatedly folded and uplifted by Early Cimmerician orogeny, Lias-Dogger is represented by continental-subcontinental molassic detritic deposits. Malm-Early Cretaceous is composed of by shallow and stable shelf carbonates. In this carbonate platform, begining to be unstable in the Late Cretaceous, pelagic rhytmic series consisting of cherty and clayey carbonate alternated with clastic sediments were deposited on the Senonian time. In the area there is a different geological unit. This unit is represented with rocks belonging to the ophiolitic melange related to the subduction events during the Late Cenonian-Early Paleocene period. In the study area Lutetian aged formations were represented with reefal limestone and flysch–wild flysch sequences comprising sandy and muddy detritic pelajic deposits. Upper Lutetian-Oligocene rocks are not observed. This period is represented by folding- uplifting-thrusting and erosion activities. In the Late Eocene-Oligocene transition, allochthonous units (Bozkır, Bolkardağı and Aladağ units) were overthrusted on the autochthonous unit from north to south direction.
Key Words: Hadim; Late Cambrian-Late Lutetian; geological evolution