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Bora Uzel
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Dr. B. Uzel
Paleomagnetic Laboratory
Fort Hoofddijk
Department of Earth Sciences
Utrecht University 
Budapestlaan 17, 3584 CD Utrecht 
The Netherlands 

Phone +90 232 301 7343


Usually at:
Dokuz Eylül University
Faculty of Engineering
Department of Geology
35100 Bornova IZMIR

Research of Bora Uzel

Geological evolution of transfer zones and their contribution to N-S Extensional tectonics in western Anatolia
Continental rifts and graben are the most prominent geological structures on the continental crust that deformed under the control of extensional tectonics. Stress is accommodated by weakness zones perpendicular to the orientation of these depressions. 

In recent studies carried out in western Anatolia, a crustal scale zone of weakness is found in a region located between Izmir and Balikesir. This Izmir-Balikesir transfer zone is bounded by the E-W trending Gediz, Küçük Menderes and Büyük Menderes graben, the Menderes metamorphic core complex and by related detachment faults from the west. In this zone we find Paleozoic-Mesozoic rocks of the Karaburun belt and the Bornova Flysch zone, sedimentary rocks of Eocene age, volcano-sedimentary rocks of Neogene age, Plio-Quaternary units and Holocene-Recent sediments (see the map below).

These rocks associations belong to dissimilar basins that developed in different time periods. The NE-trending basins and their boundary faults are also known from the northern and eastern part of the Gediz graben.

The main subject of this study is to investigation of the NE-trending Neogene-Recent basins and their structural features. The geological evolution and the stress regime that caused stresses the Neogene to Recent basins will be established. This includes the study of rotations.
To do this, we will:

1 - study certain key areas within the NE-trending basins at 1:25.000 scale, 

2 - determine the age of the rock units by Ar/Ar dating and paleontology, 

3 - establish the geometry and kinematic features of faults that (de)formed the basin fill and 

4 - carry out paleomagnetic studies to determine the style and amount of rotation.
The data obtained from the field and laboratory studies will establish for the first time the contribution of NE-trending weak zones to the N-S extensional tectonics of western Anatolia that were claimed to have been formed since the Oligocene. The study will also establish the role and significance of zones of weakness developed parallel to the orientation of extension in western Anatolia.

These studies will be carried out together with staff members from Dokuz Eylül University (Izmir) and Middle East Technical University (Ankara). This project supports three PhD students and one MSc student. 
Bora Uzel is supervised by Hasan Sözbilir, Nuri Kaymakci and Cor Langereis, and has successfully defended his PhD thesis in April 2013.

publicationsPublications of Bora Uzel
  • Uzel, B., Sümer. Ö, Özkaptan, M., Özkaymak. Ç, Kuiper, K.F., Sözbilir. H., Kaymakci, N., İnci, U. and Langereis, C.G. (2017). Paleomagnetic and geochronologic evidence for a major middle Miocene unconformity in Söke Basin (Western Anatolia) and its tectonic implications for the Aegean region, Journal of the Geological Society,  
  • Uzel, B. (2016). Field evidence for normal fault linkage and relay ramp evolution: the Kırkağaç Fault Zone, western Anatolia (Turkey). Geodinamica Acta, 28 (4), 311–327,
  • Sözbilir, H., Özkaymak, Ç., Uzel, B., Sümer, Ö., Eski, S. & Tepe, Ç. (2016). Palaeoseismology of the Havran-Balıkesir Fault Zone: evidence for past earthquakes in the strike- slip-dominated contractional deformation along the southern branches of the North Anatolian fault in northwest Turkey. Geodinamica Acta, 28 (4), 254–272,
  • Sözbilir, H., Özkaymak, Ç., Sümer, Ö., Uzel, B., Güler, T. & Eski, S. (2016). Kinematic analysis and palaeoseismology of the Edremit Fault Zone: evidence for past earthquakes in the southern branch of the North Anatolian Fault Zone, Biga Peninsula, NW Turkey. Geodinamica Acta, 28 (4), 273–294,
  • Uzel, B., Langereis, C.G., Kaymakci, N., Sözbelir, H., Özkaymak, Ç., Özkaptan, M. (2015). Paleomagnetic evidence for an inverse rotation history of Western Anatolia during the exhumation of Menderes metamorphic core complex,  Earth Planetary Science Letters, 414, 108-125.   
  • Karaoğlu, Ö. and Erkül, F. (2015). Comment on "Paleomagnetic evidence for an inverse rotation history of Western Anatolia during the exhumation of Menderes metamorphic core complex" by Uzel et al. (Earth Planet. Sci. Lett. 414 (2015) 108-125), Earth Planetary Science Letters, 427, 309-311.   
  • Uzel, B., Langereis, C.G., Kaymakci, N., Sözbelir, H., Özkaymak, Ç., Özkaptan, M. (2015). Reply to Karaoğlu and Erkül's comment on: "Paleomagnetic evidence for an inverse rotation history of Western Anatolia during the exhumation of Menderes metamorphic core complex",  Earth Planetary Science Letters, in press
  • Özkaymak, Ç., Sözbilir, H. and Uzel, B. (2013). Neogene-Quaternary Evolution of the Manisa Basin: Evidence for Variation in the Stress Pattern of the Izmir-Balikesir Transfer Zone, Western Anatolia, Journal of Geodynamics, 65, 117-135.   
  • Uzel, B.,  Sözbilir, H., Özkaymak, Ç., Kaymakci, N. and Langereis, C.G. (2013).  Structural evidence for strike-slip deformation in the İzmir-Balıkesir Transfer Zone and consequences for late Cenozoic evolution of western Anatolia (Turkey),  Journal of Geodynamics, 65, 94-116.   
  • Akçar, N., Tikhomirov, D., Özkaymak, C.,Ivy-Ochs, S.,  Alfimov,V., Sözbilir, H., Uzel, B. and Schlüchter, C. (2012). 36Cl exposure dating if paleoearthquakes in the Eastern Mediterranean: First  results from the western Anatolian Extensional Province, Manisa fault zone, Turkey. GSA Bulletin, 124(11-12), 1724-1735.  
  • Uzel, B.,  Sözbilir, H. and Özkaymak, Ç. (2012). Neotectonic Evolution of an Actively Growing Superimposed Basin in Western Anatolia: The Inner Bay of Izmir, Turkey, Turkish Journal of Earth Sciences, 21, 239-271.   
  • Koca, M.Y.,  Sözbilir, H. and Uzel , B. (2011). An Investigation on the Causes of Deformations Formed Along the Sarıgöl Fault Zone (Sarıgöl Fay Zonu Boyunca Meydana Gelen  Deformasyonların Nedenleri Üzerine Bir Araştırma), Journal of Geological Engineering (Jeoloji Mühendisli þi Dergisi), 35, 151-174.  
  • Özkaymak, Ç., Sözbilir, H., Uzel, B. and Akyüz, H.S. (2011). Geological and palaeoseismological evidence for Late Pleistocene-Holocene activity on the Manisa Fault Zone, Western Anatolia, Turkish Journal of Earth Sciences, 20, 449-474.  
  • Sözbilir, H., Sari, B., Uzel, B., Sömer, O. and  Akkiraz, S. (2011). Tectonic implications of transtensional supradetachment basin development in an extension-parallel transferzone: the Kocacay Basin, western Anatolia, Turkey. Basin Research, 23, 423-448.   
  • Helvaci, C.,  Ersoy, E.Y., Sözbilir, H., Erkül, F.,Sümer, Ö. and Uzel, B. (2009). Geochemistry and 40Ar/39Ar geochronology of Miocene volcanic rocks from the Karaburun Peninsula: Implications for amphibole-bearing lithospheric mantle source, Western Anatolia, Journal of Volcanology and Geothermal Research, 185, 181-202. 
  • Sözbilir, H., Sümer, Ö., Uzel, B., Ersoy, Y., Erkül, F., İnci, U., Helvacı, C. and Özkaymak, Ç. (2009). The Seismic geomorphology of the Sığacık Gulf (İzmir) earthquakes of October 17 to 20, 2005 and their relationships with the stress field of their Western Anatolian region [17-20 Ekim 2005-Sığacık Körfezi (İzmir) depremlerinin sismik jeomorfolojisi ve bölgedeki gerilme alanları ile ilişkisi, Batı Anadolu]. Geological Bulletin of Turkey, 52, 217-238.   
  • Sözbilir, H., Uzel, B., Sümer, Ö., Ýnci, U., Ersoy, Y., Koçer, T., Demirtaþ, R. ve Özkaymak, Ç. (2008). Evidence for a kinematically linked E-W trending Izmir Fault and NE-trending Seferihisar Fault: Kinematic and paleoseismogical studies carried out on active faults forming the Izmir Bay, Western Anatolia. Türkiye Jeoloji Bülteni, 51 (2), 91-114
  • Uzel, B. & Sözbilir, H. (2008). A First record of strike-slip basin in western Anatolia and its tectonic implication: The Cumaovasi basin as an example. Turkish Journal of Earth Sciences, 17, 559-591.