Co-seismic beachrock deformation of 8th century AD Earthquake in Middle Strand of North Anatolian Fault, Lake Iznik, NW Turkey

Ahmet Evren Erginal*, Ramazan Cüneyt Erenoğlu, Cengiz Yıldırım, H. Haluk Selim, Nafiye Güneç Kıyak, Oya Erenoğlu, Emin Ulugergerli, Mustafa Karabıyıkoğlu

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Özet

A historical earthquake-related co-seismic deformation observed on beachrock beds along the southern shoreline of Lake Iznik is discussed as a new paleoseismic record for an 8th century AD earthquake in the Middle Strand of the North Anatolian Fault, NW Turkey. Electrical Resistivity Tomography (ERT) images beneath the beachrock surface allowed monitoring of the subsurface trace of a normal fault dipping north along a 100 m surface rupture. No strike-slip deformation exists along the rupture, suggesting that the deformation in the beachrock is connected with a secondary structure, and that the main surface rupture was under the lake waters. The deformed beds of the beachrock, dated using Optically Stimulated Luminescence (OSL) to 1.3 ± 0.15 ka, are overlain by an undeformed secondary deposition of beds dated to 1.2 ± 0.09 ka. This allows us to narrow down the time of the faulting and implying that it was most likely a result of the AD 715 earthquake.

Orijinal dilİngilizce
Makale numarası228690
DergiTectonophysics
Hacim799
DOI'lar
Yayın durumuYayınlandı - 20 Oca 2021

Bibliyografik not

Publisher Copyright:
© 2020 Elsevier B.V.

Finansman

This research was supported by TUBITAK (project no: 109Y143 ) and the Scientific Research Projects Unit of Çanakkale Onsekiz Mart University (project no: SBA-2018-2772 ). AEE wishes to thank the Turkish Academy of Sciences (TUBA) for their support in the framework of the GEBİP program. Nurettin Yakupoğlu is thanked for his help in calculating the radiocarbon reservoir ages of beachrock samples. This paper is dedicated in fond memory of Professor Cengiz Akbulak, who completed his doctoral studies in the Lake Iznik basin and sadly passed away on Sunday July 21, 2019. This research was supported by TUBITAK (project no: 109Y143) and the Scientific Research Projects Unit of ?anakkale Onsekiz Mart University (project no: SBA-2018-2772). AEE wishes to thank the Turkish Academy of Sciences (TUBA) for their support in the framework of the GEB?P program. Nurettin Yakupo?lu is thanked for his help in calculating the radiocarbon reservoir ages of beachrock samples. This paper is dedicated in fond memory of Professor Cengiz Akbulak, who completed his doctoral studies in the Lake Iznik basin and sadly passed away on Sunday July 21, 2019.

FinansörlerFinansör numarası
TUBA
TUBITAK109Y143
Çanakkale Onsekiz Mart ÜniversitesiSBA-2018-2772
Türkiye Bilimler Akademisi

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