TY  - JOUR
A1  - Ozsayin, Erman
A1  - Ciner, T. Attila
A1  - Rojay, F. Bora
A1  - Dirik, R. Kadir
A1  - Melnick, Daniel
A1  - Fernandez-Blanco, David
A1  - Bertotti, Giovanni
A1  - Schildgen, Taylor F.
A1  - Garcin, Yannick
A1  - Strecker, Manfred
A1  - Sudo, Masafumi
T1  - Plio-Quaternary extensional tectonics of the Central Anatolian Plateau  a case study from the Tuz Golu Basin, Turkey
JF  - Turkish journal of earth sciences = Türk yerbilimleri dergisi
N2  - The Tuz Golu Basin is the largest sedimentary depression located at the center of the Central Anatolian Plateau, an extensive, low-relief region with elevations of ca. 1 km located between the Pontide and Tauride mountains. Presently, the basin morphology and sedimentation processes are mainly controlled by the extensional Tuz Golu Fault Zone in the east and the transtensional Inonu-Eskisehir Fault System in the west. The purpose of this study is to contribute to the understanding of the Plio-Quaternary deformation history and to refine the timing of the latest extensional phase of the Tuz Golu Basin. Field observations, kinematic analyses, interpretations of seismic reflection lines, and Ar-40/Ar-39 dating of a key ignimbrite layer suggest that a regional phase of NNW-SSE to NE-SW contraction ended by 6.81 +/- 0.24 Ma and was followed by N-S to NE-SW extension during the Pliocene-Quaternary periods. Based on sedimentological and chronostratigraphic markers, the average vertical displacement rates over the past 5 or 3 Ma with respect to the central part of Tuz Golu Lake are 0.03 to 0.05 mm/year for the fault system at the western flank of the basin and 0.08 to 0.13 mm/year at the eastern flank. Paleo-shorelines of the Tuz Golu Lake, vestiges of higher lake levels related to Quaternary climate change, are important strain markers and were formed during Last Glacial Maximum conditions as indicated by a radiocarbon age of 21.8 +/- 0.4 ka BP obtained from a stromatolitic crust. Geomorphic observations and deformed lacustrine shorelines suggest that the main strand of the Tuz Golu Fault Zone straddling the foothills of the Sereflikochisar-Aksaray range has not been active during the Holocene. Instead, deformation appears to have migrated towards the interior of the basin along an offshore fault that runs immediately west of Sereflikochisar Peninsula. This basinward migration of deformation is probably associated with various processes acting at the lithospheric scale, such as plateau uplift and/or microplate extrusion.
KW  - Central Anatolia
KW  - Tuz Golu Basin
KW  - orogenic plateau evolution
KW  - extensional tectonics
KW  - kinematic analysis
KW  - lake shoreline
Y1  - 2013
U6  - https://doi.org/10.3906/yer-1210-5
SN  - 1300-0985
VL  - 22
IS  - 5
SP  - 691
EP  - 714
PB  - Tübitak
CY  - Ankara
ER  -