Articles | Volume 9, issue 2
Solid Earth, 9, 295–322, 2018
Solid Earth, 9, 295–322, 2018

Research article 21 Mar 2018

Research article | 21 Mar 2018

Paleomagnetic constraints on the timing and distribution of Cenozoic rotations in Central and Eastern Anatolia

Derya Gürer1, Douwe J. J. van Hinsbergen1, Murat Özkaptan2, Iverna Creton1, Mathijs R. Koymans1, Antonio Cascella3, and Cornelis G. Langereis1 Derya Gürer et al.
  • 1Department of Earth Sciences, Utrecht University, 3584 CD Utrecht, the Netherlands
  • 2Department of Geophysical Engineering, Karadeniz Technical University, 61080 Trabzon, Turkey
  • 3Istituto Nazionale di Geofisica e Vulcanologia (INGV), 56126 Pisa, Italy

Abstract. To quantitatively reconstruct the kinematic evolution of Central and Eastern Anatolia within the framework of Neotethyan subduction accommodating Africa–Eurasia convergence, we paleomagnetically assess the timing and amount of vertical axis rotations across the Ulukışla and Sivas regions. We show paleomagnetic results from ∼ 30 localities identifying a coherent rotation of a SE Anatolian rotating block comprised of the southern Kırşehir Block, the Ulukışla Basin, the Central and Eastern Taurides, and the southern part of the Sivas Basin. Using our new and published results, we compute an apparent polar wander path (APWP) for this block since the Late Cretaceous, showing that it experienced a ∼ 30–35° counterclockwise vertical axis rotation since the Oligocene time relative to Eurasia. Sediments in the northern Sivas region show clockwise rotations. We use the rotation patterns together with known fault zones to argue that the counterclockwise-rotating domain of south-central Anatolia was bounded by the Savcılı Thrust Zone and Deliler–Tecer Fault Zone in the north and by the African–Arabian trench in the south, the western boundary of which is poorly constrained and requires future study. Our new paleomagnetic constraints provide a key ingredient for future kinematic restorations of the Anatolian tectonic collage.

Short summary
Central and Eastern Anatolia (present-day Turkey) accommodated Africa–Eurasia convergence in Cenozoic times. As a result, the region underwent distributed deformation and rotation. We provide a paleomagnetic dataset from sedimentary basins and assess the timing and amount of rotations. The obtained rotation patterns together with known fault zones suggest that south-central Turkey represents a coherently counterclockwise-rotating domain.