Neotectonics of Altıntaş (Araban, Gaziantep) basin, SE Turkey

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2016

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Çiçek, Aydın

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Altıntaş basin is an approximately 6-9 km wide, 50 km long and E-Wtrending depression located in the northwestern margin of the Arabian Plate. The Study area is bounded by the Kırkpınar fault zone to the west, by the Güllüce Fault Zone to the north, by the Bağlıca, Akdurak, Erenbağ and Fıstıklıdağ Fault Sets to the northeast, by the Kemerli Fault set to the east and Karasu Fold Set to the south. Altıntaş Basin comprises two distinct basin fills separated by a clear angular unconformity. (1) Middle Eocene-Pliocene deformed fill and (2) Early Quaternary to recent nearly flat lying fill. Field observations reveal that Middle Eocene to Pliocene units developed inside a foreland system under the control of dominantly NNW-trending mainly contractional deformation. This phase is named as “phase-1”. In addition to this, the pre-modern Altıntaş ramp-basin formed due to separation of the Araban Block from the northwestern margin of the Arabian vi Plate at the end of Phase-1. Later, NNW-trending maximum principal stress axis was modified into NW to E-W-trends with strike-slip tectonic regime. This term has been regarded as Phase-2. During this phase, the basin configuration did not change significantly. Later, the maximum principal stress axis has become dominantly NNE-trends in relation to onset of escape of the Anatolian Collage. This phase has been regarded as Phase-3 or the neotectonic period. During this period, the Altıntaş basin restricted to a smaller area due to formation of a strikeslip basin.

Subject Keywords

Neotectonics., Basins (Geology)., Geology, Structural.

URI

http://etd.lib.metu.edu.tr/upload/12619993/index.pdf
https://hdl.handle.net/11511/25652

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

A. Çiçek, “Neotectonics of Altıntaş (Araban, Gaziantep) basin, SE Turkey,” Ph.D. - Doctoral Program, Middle East Technical University, 2016.