Inferences for the Existence of the Fethiye Burdur Fault Zone in SW Anatolia (Turkey) T ⁎ Murat Özkaptana, Nuretdin Kaymakcib, , Cor G
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Tectonophysics 744 (2018) 256–274 Contents lists available at ScienceDirect Tectonophysics journal homepage: www.elsevier.com/locate/tecto Age and kinematics of the Burdur Basin: Inferences for the existence of the Fethiye Burdur Fault Zone in SW Anatolia (Turkey) T ⁎ Murat Özkaptana, Nuretdin Kaymakcib, , Cor G. Langereisc, Erhan Gülyüzd, A. Arda Özacarb, Bora Uzele, Hasan Sözbilire a Karadeniz Technical University, Department of Geophysical Engineering, TR-61080 Trabzon, Turkey b Middle East Technical University, Geological Engineering, TR-06800 Ankara, Turkey c Paleomagnetic Laboratory Fort Hoofddijk, Department of Earth Sciences, Utrecht University, Budapestlaan 17, 3584 CD Utrecht, the Netherlands d Van Yüzüncü Yıl University, Department of Geological Engineering, 65080 Van, Turkey e Dokuz Eylül University, Department of Geological Engineering, TR 35160 İzmir, Turkey ARTICLE INFO ABSTRACT Keywords: The Burdur Basin is a late Miocene to Pliocene fluvio-lacustrine basin in SW Anatolia. It is developed within the Burdur Basin postulated Fethiye-Burdur Fault Zone, which was argued to be a sinistral strike-slip fault zone developed in Fethiye-Burdur Fault Zone response to propagation of the Pliny-Strabo STEP fault into SW Anatolia (Turkey). In order to assess the presence Magnetostratigraphy and tectonic characteristics of the fault zone, we conducted a paleomagnetic study in the Burdur basin that Anisotropy of Magnetic Susceptibility involved rock magnetic experiments, Anisotropy of Magnetic Susceptibility (AMS) measurements and devel- Paleostress inversion oping a magnetostratigraphy for dating purposes. The obtained age model constrains most part of the tectonic evolution of the basin. The well exposed (~270 m thick) Burdur section revealed 3 normal and 2 reverse polarity magnetozones. We propose that the Burdur Formation spans most of the Gauss Chron (~3.4–2.5 Ma) which implies a sedimentation rate of > 18 cm/kyr. The AMS results in the section indicate NW-SE directed extension. In addition, we have also conducted kinematic analyses from 1790 fault slip data collected at 44 sites dis- tributed within the supposed Fethiye Burdur Fault Zone in the region. The results indicate that the region has been developed under a NW-SE directed extensional deformation regime and was dominated by NE-SW striking normal faults from late Miocene to recent. Few NW-SE striking normal faults with strike-slip components are categorized as transfer faults, which accommodated differential stretching between the Burdur and Çameli basins. Stretching amounts increase southwards demonstrating a dextral transtensional character of the transfer faults. We have not observed any significant strike-slip motion along the NE-SW striking faults, which challenges the presence and sinistral transcurrent nature of the supposed Fethiye Burdur Fault Zone. 1. Introduction and the Aegean region is dominated by normal faults striking in various directions. The tectonic position of SW Anatolia has been subject to The tectonic evolution of Western Anatolia and the Aegean region is debate since the late 1970's. It is located at the junction of Pliny-Strabo dominated by strike-slip tectonics and extensional deformation due to and Cyprian trenches where they meet and make very sharp southwards the combined effort of the westwards escape of Anatolia towards the bends. Recent mantle tomographic images (Biryol et al., 2011; Hellenic trench (Şengör et al., 1985) and slab-edge processes at the Faccenna et al., 2006; Govers and Wortel, 2005; van Hinsbergen et al., northern edge of the northwards subducting African oceanic litho- 2010; Portner et al., 2018; Wortel and Spakman, 2000) indicate that the sphere (Alçiçek et al., 2005; Angelier et al., 1982; Biryol et al., 2011; northern edge of the subducted African slab is torn and produced a Çemen and Yılmaz, 2017; Faccenna et al., 2006; Jolivet et al., 2013, mantle window below western Anatolia, while the Pliny-Strabo Trench 2015; van Hinsbergen et al., 2010, Özbakir et al., 2013; Wortel and is a STEP fault (sensu Govers and Wortel, 2005) which accommodated Spakman, 2000). Interaction of these processes gave way to the de- asymmetric retreat of the Hellenic trench (Duermeijer et al., 2000; velopment of a complex set of structures characterized by strike-slip Özbakir et al., 2013; Kaymakci et al., 2018). faults, mainly in northern and central Anatolia, while western Anatolia Dumont et al. (1979) were among the pioneers who recognized the ⁎ Corresponding author. E-mail address: [email protected] (N. Kaymakci). https://doi.org/10.1016/j.tecto.2018.07.009 Received 28 February 2018; Received in revised form 6 July 2018; Accepted 10 July 2018 0040-1951/ © 2018 Elsevier B.V. All rights reserved. M. Özkaptan et al. 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Rectangle indicates the Study Area and the star is the location of Magnetostratigraphical section. İBTZ: İzmir-Balıkesir Transfer Zone; ESM: Eratosthenes Sea Mount (Aksu et al., 2005; Kaymakci et al., 2010, 2018; Ocakoǧlu, 2012; Uzel et al., 2013, 2015). 257 Download English Version: https://daneshyari.com/en/article/8908611 Download Persian Version: https://daneshyari.com/article/8908611 Daneshyari.com.