Palaeoseismic behaviour of strike-slip faults in slowly deforming regions: palaeoearthquakes and long-term slip history of the Ovacık Fault (eastern Turkey)

Müge Yazıcı*, Cengiz Zabcı, Boris A. Natal’in, Taylan Sançar, H. Serdar Akyüz

*Bu çalışma için yazışmadan sorumlu yazar

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1 Atıf (Scopus)

Özet

The Ovacık Fault (OF) is one of the internal structures of the Anatolian Block, located close to its eastern boundary. Although it shows a very clear surface trace, there are no instrumentally recorded surface rupturing earthquakes on this fault. This study concludes results of the first palaeoseismological trench study on the OF with the evidence for three surface rupturing earthquakes for the last 6 kyr. Structural, stratigraphical and geochronological constraints show that the oldest event happened between 4700 and 3022 BCE, whereas the penultimate event was between 2262 and 1643 BCE. The youngest event happened after 56 BCE, which we could only delimit from below because of the absence of any dateable material from the upper layers of the relevant horizons. The derived mean interevent time of these three palaeoevents is 2400 ± 765 years. We could not correlate any of these palaeoevents with historical earthquakes due to the absence of records in catalogues for the region of interest. Moreover, we used cumulative offsets of the major drainages to calculate the long-term slip rate of 2.7 mm/year since the Pliocene, which exceeds slip rates of other internal faults of Anatolia almost by the factor of two. Our results do not only show significant deformation for the internal parts of Anatolia but also point out a seismic potential of the OF.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)255-272
Sayfa sayısı18
DergiJournal of Seismology
Hacim25
Basın numarası1
DOI'lar
Yayın durumuYayınlandı - Şub 2021

Bibliyografik not

Publisher Copyright:
© 2020, Springer Nature B.V.

Finansman

This study was supported by the Scientific and Technological Research Council of Turkey (TÜBİTAK) with grant number 114Y227 and by the Istanbul Technical University with grant number BAP MYL-2017-40833. Acknowledgements

FinansörlerFinansör numarası
TÜBİTAK114Y227
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu
Istanbul Teknik ÜniversitesiBAP MYL-2017-40833

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