Cenozoic tectonics of the Tuz Gölü Basin (Central Anatolian Plateau, Turkey)

This is a Preprint and has not been peer reviewed. The published version of this Preprint is available: https://doi.org/10.3906/yer-1210-5. This is version 1 of this Preprint.

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Authors

David Fernández-Blanco , Giovanni Bertotti, Attila Çiner

Abstract

We present a new 3D geologic model for the architecture and Cenozoic tectonic evolution of the Tuz Gölü Basin, a major sedimentary basin in the Central Anatolian orogenic plateau. This model is grounded on 7 depth-converted seismic reflection profiles in combination with the analysis of backstripped subsidence curves, isochore maps, and a palinspastically restored cross-section. Two stages of basin formation are detected during Cenozoic times. During the Palaeogene, around 2 km of basement subsidence led to the development of a sag basin broader than the present basin in the absence of bounding faults. After a period of uplift and erosion, sedimentation restarted by Tortonian times. Up to 3.5 km of post-Palaeogene sediments were deposited in relation to this second regional subsidence phase, which continued possibly well into the Pliocene. During this time, the 2 main fault systems found in the area, the Tuz Gölü and the Sultanhanı faults, developed as south-west dipping, NW–SE striking, normal faults. At some time in the Late Miocene-Early Pliocene, during regional subsidence, a previously unreported phase of contraction occurred, which led to the development of a north-east–vergent thrust sheet, the culmination of which forms the morphologic ridge to the east of the Tuz Gölü Lake. This structure presently divides the previously continuous Tuz Gölü Basin. Finally, minor extensional reactivation occurred. At the regional scale, the pre-Late Miocene subsidence is coeval with the initiation of volcanism in the Central Anatolian Volcanic Province and marine carbonate deposition in southern Turkey, and the latest Miocene shortening is (partly) contemporaneous with the onset of uplift in the same region.

DOI

https://doi.org/10.31223/osf.io/8ztw9

Subjects

Earth Sciences, Geology, Physical Sciences and Mathematics

Keywords

Cenozoic, Central Anatolian Plateau, Turkey, Miocene, thrust, Tuz Gölü Lake, vertical tectonics

Dates

Published: 2018-01-13 17:11

License

CC BY Attribution 4.0 International

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