Preliminary results about the Quaternary activity of the Ovacık Fault Eastern Turkey

Date

2014-04-12

Author

Zabcı, Cengiz
Sançar, Taylan
Aktağ, Alican
Akçar, Naki

Metadata

Show full item record

Item Usage Stats

161
views

0
downloads

The Erzincan Basin and the surrounding region have a complex structure, which is formed by the interaction of the North Anatolian Fault (NAF), the Northeast Anatolian Fault (NEAF), the Pülümür Fault (PF), and the Ovacık Fault (OF). The region has been shaked many times by devastating earthquakes throughout both the instrumental and the historical periods. The infamous 26 December 1939 Erzincan Earthquake (M~7.9) is the largest event, which was instrumentally recorded along the NAF. Moreover, the eastern continuation of the surface rupture of this earthquake, "the Yedisu Segment", is known as one of the two seismic gaps on this dextral shear zone. We started multi-disciplinary studies on the OF, which has relatively very limited data. Even though some researches think about this tectonic feature as a non-active fault, recent GPS measurements point strain accumulation along it. In addition to that 1992 Erzincan and 2003 Pülümür earthquakes loaded additional stress on the neighboring faults, including the OF. The OF elongate between the SE Erzincan Basin and Kemaliye (Erzincan) about 110 km with a general strike of N60E. The clear morphological expression of the fault is especially observed around Ovacık, Tunceli. The OF delimits the Jurassic aged Munzur limestone in the north and the Miocene volcanoclastics and Permo-Carboniferous schist in the south in this vicinity. We identified many offset features, such as wash plains, moraines, alluvial fans and inset terraces in our preliminary morphological maps. The measured displacements change from 20 to 350 m, which may play a critical role in the calculation of the geological slip-rate. Moreover, we used morphological indices, such as topographic profiling, hypsometric integral, basin asymmetry, and the mountain front sinuosity to quantify the activity of the OF. Our preliminary results clearly point out the necessity of future studies, which may help to understand the earthquake potential of this poorly known tectonic feature.

URI

https://hdl.handle.net/11511/75517
https://ui.adsabs.harvard.edu/abs/2013EGUGA..15.7926Z/similar

Conference Name

EGU General Assembly, 7 - 12 Nisan 2013

Collections

Department of Geological Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

A 3000 yr paleoseismological history of the central East Anatolian Fault (Turkey) based on sedimentary record of Hazar Lake Lamaır, Laura; Hubert-ferrari, Aurelia; Hage, Sophie; Avşar, Ulaş; Schmidt, Sabine; Çağatay, Namık (null; 2017-10-12) The East Anatolian Fault (EAF) is a major left-lateral strike-slip fault accommodating with the conjugate North Anatolian Fault the westward extrusion of the Anatolian Plate away from the Arabia-Eurasia collision zone. During the 20th century, the EAF activity was mostly quiestcent with only two events of magnitude greater than 6 recorded (1905 Malatya and the 1971 Bingol earthquakes). Historical seismicity suggests that the EAF is capable of generating earthquakes of magnitude greater than 7. In order to r...
Understanding of the diversity of earthquake turbiditic flows in a single lake: the case of the Lake Hazar on the East Anatolian Faul Lamair, Laura; Hage, Sophie; Hubert-ferrari, Aurelia; Avşar, Ulaş; Garcia Moreno, David; Boulvain, Frederic; Çağatay, Namık (null; 2014-08-18) The East Anatolian Fault (EAF) is a major left-lateral strike-slip fault accommodating with the conjugate North Anatolian Fault the westward extrusion of the Anatolian Plate away from the Arabia-Eurasia collision zone. The East Anatolian Fault ruptured over most of its length during the 19th century in a series of magnitude ~7 earthquakes. During the 20th century this fault was less active with only two events of magnitude greater than 6. This absence of large earthquakes has resulted in relatively little a...
Preparation of a source model for the Eastern Marmara Region along the North Anatolian fault segments and probabilistic seismic hazard assessment of Düzce province Cambazoğlu, Selim; Akgün, Haluk; Department of Geological Engineering (2012) The North Anatolian Fault System is one of the most important active strike-slip fault systems in the world. The August 17, 1999 and November 12, 1999 earthquakes at Kocaeli and Düzce are the most recent devastating earthquakes. The study area lies in the Eastern Marmara Region and is bounded by the 28.55-33.75 E and 40.00-41.20 N, latitude and longitude coordinates, respectively. There are numerous studies conducted in the study area in terms of active tectonics and seismicity, however studies are scale de...
Noble gases and rock geochemistry of alkaline intraplate volcanics from the Amik and Ceyhan-Osmaniye areas, SE Turkey Italiano, F.; YÜCE, GALİP; Di Bella, M.; Rojay, Fuat Bora; Sabatino, G.; Tripodo, A.; Martelli, M.; Rizzo, A. L.; Misseri, M. (2017-10-10) The SE part of Turkey is characterized by a transtensional regime within the complex collision zone between the Anatolian, Arabian and African plates, which is bounded by two main faults, Dead Sea Fault and its splays on east and the Karasu Fault on west. In this tectonic and geodynamic context developed the Amik and further North, Erzin and Toprakkale districts, which are located onshore the Iskenderun Gulf, with the occurrence of a widespread and young alkaline volcanism dated from 1.57 to 0.05 Ma in Amik...
A 3000-Year Record of Ground-Rupturing Earthquakes along the Central North Anatolian Fault near Lake Ladik, Turkey Fraser, Jeff; Pigati, J. S.; Hubert-Ferrari, Aurelia; Vanneste, Krıs; Avşar, Ulaş; Altinok, S. (Seismological Society of America (SSA), 2009-10-01) The North Anatolian fault (NAF) is a similar to 1500 km long, arcuate, dextral strike-slip fault zone in northern Turkey that extends from the Karliova triple junction to the Aegean Sea. East of Bolu, the fault zone exhibits evidence of a sequence of large (M-w > 7) earthquakes that occurred during the twentieth century that displayed a migrating earthquake sequence from east to west. Prolonged human occupation in this region provides an extensive, but not exhaustive, historical record of large earthquakes ...

Citation Formats

C. Zabcı, T. Sançar, A. Aktağ, and N. Akçar, “Preliminary results about the Quaternary activity of the Ovacık Fault Eastern Turkey,” presented at the EGU General Assembly, 7 - 12 Nisan 2013, Viyana, Avusturya, 2014, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/75517.