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Fuzuli Yagmurlu, Suleyman Demirel University (Turkey)
Nevzat Özgür, Suleyman Demirel University (Turkey)
Spiros Pavlides, Aristotle University of Thessaloniki (Greece)
Alexandros Chatzipetros, Aristotle University of Thessaloniki (Greece)
Züheyr Kamaci, Suleyman Demirel University (Turkey)
Ali Pinar, Istanbul University (Turkey)
Murat Senturk, Suleyman Demirel University (Turkey)
Kubilay Uysal, Suleyman Demirel University (Turkey)
Erhan Sener, Suleyman Demirel University (Turkey)
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The subduction of the African plate under the Aegean-Peloponnisos plate (APP) in NE direction along the Creta trench is one of the most important geotectonic events in the Eastern Mediterranean region. Close to westwards movement of the North Anatolian Fault (NAF), the APP moves to SW with a great velocity and extends in connection with this subduction. This study aims to find out seismotectonic features of the Fethiye-Burdur Fault Zone (FBFZ) representing southern boundary of the APP as well as its accompanying tectonic and geographic structures in SW Anatolia.
The geographic structure in SW Anatolia, the so called "Isparta Angle" corresponding with the geometry of Gulf of Antalya, is one of the most important geotectonic structures located in the S of the APP. In neotectonic period, the Isparta Angle created by bending of Mesozoic carbonat axis of Taurides in N of Gulf of Antalya is delimited from FBFZ in the W and Akşehir-Simav fault in the E generally. The carbonate sequence located in the W of symmetric axis of Eirdir-Kovada graben is Beyda autochthonous, and autochthonous carbonates in the E form the Akseki-Anamas plattform.
The FBFZ forming the southern boundary of the APP and delimiting the Isparta-Angle from the W is a sinistral fault of an en-echalon structure in NE direction. The FBFZ is a fault system consisting of parallel-semi parallel discontinous fault segments. The width of this fault zone, which displays about 300 km length between Burdur Lake and Gulf of Fethiye, ranges from 3 to 10 km. Mud dykes and collovial formations in the southern part of the Burdur Lake, remnants of topographic scarps around Hacılar and fracture fillings associated with earthquakes of 1914 can be considered as active fault imprints.
Recent GPS data prove that the APP in the northern part of the FBFZ extends with a velocity of 3 cm/year in SW direction. However, the same data indicate that no significant extention or movement in the S of the FBFZ within the Isparta-Angle occurred. In addition, the movement in SW direction of the APP surrounded by FBFZ resulted in the formation of active normal faults, such as Mula-Yataan, Acıpayam-Honaz, Dinar-Çivril and Akşehir-Simav in SW Anatolia.
Paleomagnetic data indicate that the western part of the Isparta-Angle in SW Anatolia caused a 35-40 degrees counter clockwise rotation during Late Miocene to Early Pliocene. On the other side, the SW movement of Anatolian plate due to activities of North Anatolian Faults and East Anatolian Faults resulted in at least 45 degrees of clockwise rotation of the eastern part of the Isparta-Angle until Late Miocene. The inverse rotation of E and W parts of Isparta-Angle caused imbricate thrust systems, reverse faults and conjugate strike-slip faults, such as Aksu, Anamas and Akda thrusts in SW Anatolia, which are still active today.
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