Active tectonics and kinematics of Fethiye-Göcek Bay, SW Turkey

Tosun, Levent
Tomographic studies conducted in Eastern Mediterranean region reveal that Pliny-Strabo Trench corresponds to a tear known as "STEP" (Subduction Transform Edge Propagator) fault connecting the Aegean and Cyprean trenches along the northern edge of the northward subducting African lithosphere. Recently, it is claimed that Fethiye-Burdur Fault Zone, which interpreted as a sinistral transtensional shear zone, is the northeaster continuation of this fault. In order to test this hypothesis, a rigorous study aiming at unravelling the characteristics and kinematic of the faults developed around the Fethiye-Göcek Bay located at the northeastern termination of the Pliny-Strabo Trench from off-shore to on-shore was conducted. In this context, totally 228 km long, 32 seismic lines collected from the Fethiye-Göcek Bay, are interpreted and faults cutting the seabed were mapped. In addition, the on-land continuation and characteristics of these faults were verified in the field. For this purpose, about 15.000 fault slip data from 222 locations within the bay and its vicinity were collected and analyzed. According to obtained results, all of the faults are developed under approximately NW-SE directed extension, except some NW-SE-striking faults, which have strike-slip components contrary to proposed sinistral nature of alleged Fethiye-Burdur Fault Zone. There is not any tangible evidence that supports the existence of a sinistral transtensional shear zone in the region. It is claimed that Pliny-Strabo Trench does not propagate on-land along a NE-SW striking major sinistral strike-slip shear zone in the region, and that existence and characteristics of the Fethiye-Burdur Fault Zone are therefore debatable.


Active tectonics and kinematics of Fethiye-Göcek Bay, SW Turkey: Insight about the eastern edge of Pliny-Strabo Trenches
Tosun, Levent; Avşar, Ulaş; Avşar, Özgür; Dondurur, Derman; Kaymakcı, Nuretdin (2021-04-01)
© 2021 Elsevier LtdPliny-Strabo Trench (PST)is a Subduction Transform Edge Propagator (STEP) fault developed at the northern edge of the African oceanic lithosphere connecting the Aegean and Cyprian trenches in the eastern Mediterranean. Recent studies have demonstrated that the PST terminates close to Turkish Border and links to the Cyprian trench east of Rhodes and south of Fethiye-Göcek Bay. However, it is also claimed that the PST extends into SW Anatolia along a sinistral transtensional shear zone, so-...
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Sarp, Gülcan; Toprak, Vedat; Düzgün, H. Şebnem; Department of Geodetic and Geographical Information Technologies (2012)
This study aims to investigate tectonic activity levels and development stages of the tectonic and hydrologic basin areas located on western part of the main trace of the North Anatolian Fault Zone (NAFZ) using quantitative measurement techniques. The basins investigated are Bolu, Yeniçağa, Dörtdivan, Çerkes, Ilgaz and Tosya. The methodology includes application of six morphometric indices (Basin Shape, Hypsometric curve and Hypsometric Integral, Sinuosity of Mountain Fronts, Stream Length Gradient Index, V...
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Anatolian interior is characterized by large lateral and vertical displacements and a complex tectonic history. Especially, Central Anatolia is located between escape tectonics in the east and extensional deformation in the west. The nature of this transition is still under much debate and requires detailed analysis of active tectonic stresses within the region. In this study, regional moment tensor inversion is performed for 29 earthquakes with M>3.5 recorded between 2013-2015 by a temporary broadband seis...
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Tokay, Bülent; Bozkurt, Erdin; Kaymakcı, Nuretdin; Department of Geological Engineering (2015)
The Central Anatolian Crystalline Complex (CACC) forms a part of Alpine orogenic belt in Turkey and incorporates three major massifs and several basins that developed during extension commenced by the Late Cretaceous. They were deformed during subsequent collision of Anatolide-Tauride Platform and Pontides. The deformation of the region has resulted in the break-up of the CACC along major deformation (fault) zones. The present study aims to test existence of one of these fault zones, namely Delice-Kozaklı f...
EDIGER, V; OKYAR, M; ERGIN, M (Elsevier BV, 1993-11-01)
High-resolution shallow seismic reflection (Uniboom) and echosounding profiles obtained on the shelf and upper slope areas of Anamur Bay (Turkey, northeastern Mediterranean) were studied together with previous data on the onshore geology of the area to investigate the origin and related seismic stratigraphy of the submarine Anamur Canyon. It was found that the main axial trend of the submarine Anamur Canyon is aligned with the offshore projection of the N-S orientated, onshore Anamur thrust fault of Late Cr...
Citation Formats
L. Tosun, “Active tectonics and kinematics of Fethiye-Göcek Bay, SW Turkey,” M.S. - Master of Science, Middle East Technical University, 2018.