Extensional and compressional regime driven left-lateral shear in southwestern Anatolia (eastern Mediterranean): The Burdur-Fethiye Shear Zone

İrem Elitez*, Cenk Yaltırak, Bahadır Aktuğ

*Bu çalışma için yazışmadan sorumlu yazar

Araştırma sonucu: Dergiye katkıMakalebilirkişi

33 Atıf (Scopus)

Özet

The tectonic framework of the eastern Mediterranean presented in this paper is based on an active subduction and small underwater hills/mountains on the oceanic crust moving toward the north. The Hellenic Arc, the Anaximander Mountains, the Rhodes and Finike basins, the compressional southern regions of the Western Taurides, and the extensional western Anatolian graben are the main interrelated tectonic structures that are shaped by the complex tectonic regimes. There are still heated debates regarding the structural properties and tectonic evolution of the southwestern Anatolia. GPS velocities and focal mechanisms of earthquakes demonstrate the absence of a single transform fault across the Burdur-Fethiye region; however, hundreds of small faults showing normal and left-lateral oblique slip indicate the presence of a regionally extensive shear zone in southwestern Turkey, which plays an important role in the eastern Mediterranean tectonics. The 300-km-long, 75–90-km-wide NE-SW-trending Burdur-Fethiye Shear Zone developed during the formation of Aegean back-arc extensional system and the thrusting of Western Taurides. Today, the left-lateral differential motion across the Burdur-Fethiye Shear Zone varies from 3 to 4 mm/yr in the north to 8–10 mm/yr in the south. This finding could be attributed to the fact that while the subduction of the African Plate is relatively fast beneath the western Anatolia at the Hellenic Trench, it is slow or locked beneath the Western Taurides. Therefore, the GPS vectors and their distributions on land indicate remarkable velocity differences and enable us to determine the left-lateral shear zone located between the extensional and compressional blocks. Furthermore, this active tectonic regime creates differences in topography. This study also demonstrates how deep structures, such as the continuation of the subduction transform edge propagator (STEP) fault between the Hellenic and Cyprus arcs in the continental area, can come into play as a shear zone on the brittle crust.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)26-35
Sayfa sayısı10
DergiTectonophysics
Hacim688
DOI'lar
Yayın durumuYayınlandı - 12 Eki 2016

Bibliyografik not

Publisher Copyright:
© 2016 Elsevier B.V.

Finansman

This study is part of the ongoing PhD studies of Elitez at İstanbul Technical University. The authors are grateful to TÜBİTAK ÇAYDAG (Project No: 107Y005 ) and İstanbul Technical University Scientific Research Projects Coordination Department (Project No: 37659 ) for financial support to field studies. We are grateful to Ali Aksu for his constructive comments and help in editing the English text. We thank Murat Şahin for his help in producing the GMT plots. We also thank the reviewers for helpful contributions to the manuscript.

FinansörlerFinansör numarası
TÜBİTAK ÇAYDAG107Y005, 37659

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