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Plio-Quaternary stress regime in Eşen Çay Basin, SW Turkey

By
Semir Över
Semir Över
1
Department of Geophysical Engineering, Mustafa Kemal University, 31040, Antakya, Turkey
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Süha Özden
Süha Özden
2
Department of Geological Engineering, Çanakkale Onsekiz Mart University, 17020, Çanakkale, Turkey
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Hüseyin Yilmaz
Hüseyin Yilmaz
3
Department of Geophysical Engineering, Cumhuriyet University, 58140, Sivas, Turkey
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Ali Pinar
Ali Pinar
4
Kandilli Observatory and Earthquake Research Institute, Boğazici University, 34684, Istanbul, Turkey
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Ulvi Can Ünlügenç
Ulvi Can Ünlügenç
5
Department of Geological Engineering, Çukurova University, 01330, Adana, Turkey
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Zuheyr Kamaci
Zuheyr Kamaci
6
Department of Geophysical Engineering, Suleyman Demirel University, 32260, Isparta, Turkey
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Published:
January 01, 2013

Abstract

The Plio-Quaternary Eşen Çay Basin is situated at the junction of Hellenic and Cyprus arcs in southwestern Turkey. The basin is important for understanding the tectonic evolution of the region in relation to the Hellenic and Cyprus arcs. Fault data from unconsolidated Pliocene and Quaternary deposits, as well as from pre-Pliocene lithologies, are analysed in order to reconstruct the evolution of the stress field evolution from Pliocene onwards. Inversion of measured fault slip vector data identifies two main stress states: extensional and strike-slip. Both states are characterized by a NE–SW-trending minimum horizontal stress axis (σHmin3). The mean R value is 0.67, indicating a triaxial state of stress. The inversion also indicates the existence of extensional and strike-slip faulting characterized by a NW–SE-trending σ3 axis. This indicates a change in the direction of the minimum horizontal stress axis (σ3) from a NW–SE-trending σ3 that dominated prior to Quaternary to a NE–SW-trending σ3 that dominated during Quaternary up to actual time.

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Contents

Geological Society, London, Special Publications

Geological Development of Anatolia and the Easternmost Mediterranean Region

A. H. F. Robertson
A. H. F. Robertson
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O. Parlak
O. Parlak
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U. C. Ünlügenç
U. C. Ünlügenç
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Geological Society of London
Volume
372
ISBN electronic:
9781862396357
Publication date:
January 01, 2013

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