TY  - JOUR
A1  - Mueller, Megan A.
A1  - Licht, Alexis
A1  - Campbell, C.
A1  - Ocakoglu, F.
A1  - Taylor, Marc Hollis
A1  - Burch, L.
A1  - Ugrai, Tamas
A1  - Kaya, M.
A1  - Kurtoglu, B.
A1  - Coster, P. M. C.
A1  - Metais, Mustafa Yücel
A1  - Beard, Kenneth Christopher
T1  - Collision Chronology Along the Izmir-Ankara-Erzincan Suture Zone: Insights From the Saricakaya Basin, Western Anatolia
JF  - Tectonics
N2  - Debate persists concerning the timing and geodynamics of intercontinental collision, style of syncollisional deformation, and development of topography and fold-and-thrust belts along the >1,700-km-long Izmir-Ankara-Erzincan suture zone (IAESZ) in Turkey. Resolving this debate is a necessary precursor to evaluating the integrity of convergent margin models and kinematic, topographic, and biogeographic reconstructions of the Mediterranean domain. Geodynamic models argue either for a synchronous or diachronous collision during either the Late Cretaceous and/or Eocene, followed by Eocene slab breakoff and postcollisional magmatism. We investigate the collision chronology in western Anatolia as recorded in the sedimentary archives of the 90-km-long Saricakaya Basin perched at shallow structural levels along the IAESZ. Based on new zircon U-Pb geochronology and depositional environment and sedimentary provenance results, we demonstrate that the Saricakaya Basin is an Eocene sedimentary basin with sediment sourced from both the IAESZ and Sogut Thrust fault to the south and north, respectively, and formed primarily by flexural loading from north-south shortening along the syncollisional Sogut Thrust. Our results refine the timing of collision between the Anatolides and Pontide terranes in western Anatolia to Maastrichtian-Middle Paleocene and Early Eocene crustal shortening and basin formation. Furthermore, we demonstrate contemporaneous collision, deformation, and magmatism across the IAESZ, supporting synchronous collision models. We show that regional postcollisional magmatism can be explained by renewed underthrusting instead of slab breakoff. This new IAESZ chronology provides additional constraints for kinematic, geodynamic, and biogeographic reconstructions of the Mediterranean domain.
KW  - Anatolia
KW  - geochronology
KW  - collision
KW  - Eocene
KW  - detrital zircons
Y1  - 2019
U6  - https://doi.org/10.1029/2019TC005683
SN  - 0278-7407
SN  - 1944-9194
VL  - 38
IS  - 10
SP  - 3652
EP  - 3674
PB  - American Geophysical Union
CY  - Washington
ER  -