The East Anatolian Fault: geometry, segmentation and jog characteristics

Abstract

A detailed account is given of the fault geometry and segment structure of the East Anatolian Fault Zone as a whole based on mapping of active faults, supported by available seismological and palaeoseismological data. We divide the East Anatolian Fault into two main strands: southern and northern. The main southern strand is c. 580 km long between Karlıova and Antakya, and connects with the Dead Sea Fault Zone and the Cyprus Arc via the Amik triple junction. The northern strand, termed the Sürgü–Misis Fault system, is c. 350 km long and connects with the Kyrenia–Misis Fault Zone beneath the Gulf of İskenderun. We infer that slip partitioning between the main and northern strands of the East Anatolian Fault accommodates 2/3 and 1/3 of the slip rate of the lateral motion between the Arabian and Anatolian plates, respectively in the Çelikhan–Adana–Antakya region. Taking account of the time elapsed from the latest events on the East Anatolian Fault, we suggest that the Pazarcık and Amanos segments have the potential to produce destructive earthquakes in the near future.Supplementary material:The data and interpretations given here are supported by five additional annotated field photographs and two tables of factual data, these are available at www.geolsoc.org.uk/SUP18568

Palaeozoic-Recent geological development and uplift of the Amanos Mountains (S Turkey) in the critically located northwesternmost corner of the Arabian continent

“…The older alluvium of inferred Pliocene-Early Pleistocene(?) age is generally tilted to higher angles (20-25°) than the younger, better-dated Pleistocene alluvium (1520°) (Duman & Emre, 2013;this study). A possible explanation is that the Amanos Mountains began to undergo extensional (or transtensional faulting) during later Pleistocene time, especially in the west (i.e.…”

“…The first is likely be inherited Hatay depression (Hatay graben) and then extends as a convergent margin to the SE and S of Cyprus (Figure 2). The existence of normal faults within the Karasu trough imply that transtension-related processes have an important influence on the structural evolution of the Karasu Valley (Boulton, 2013;Boulton & Robertson, 2008;Duman & Emre, 2013). Both flanks of the Amanos Mountains (Karasu Valley and Osmaniye-Düziçi area) (Figure 22) are characterized by Quaternary basaltic rocks which are locally cut by relatively recent strike-slip faults.…”

“…The SMFZ appears to have reactivated some pre-existing Miocene compressional structures where these have a suitable trend and dip (e.g. Duman & Emre, 2013).…”

Identification of Leveled Archeological Mounds (Höyük) in the Alluvial Plain of the Ceyhan River (Southern Turkey) by Satellite Remote-Sensing Analyses

“…The Ceyhan plain corresponds to the easternmost part of the Çukurova plain, bordered to the east by the Misis Mountains and to the west by a poorly defined watershed with the Seyhan River alluvial plain. This plain corresponds to the southern part of a large tectonic depression (the so-called Adana Basin) filled with Neogene deltaic-to-fluvial sediments [35], bound by the Kozan and Ecemiş fault zones in the NW, and by the Misis-Yumurtalik fault zones in the SE [36,37] (Figure 1). A thick infilling of Quaternary deposits formed by fluvial sediments (gravel, sand, silt and clay layers) unevenly overlies the Neogene formations.…”

Bi̇ngöl Çayi Havzasi’nin (Bi̇ngöl) Heyelan Duyarlilik Anali̇zi̇

“…Heyelan duyarlılık değerlendirmelerinde bu parametrenin kullanılması fayların, kayaçların parçalanmasına neden olabileceği ve faylara yakın olan alanlarda malzemenin dayanımının azalarak, heyelan duyarlılığının artabileceği temeline dayanmaktadır (Yüksel, 2007). Doğu Anadolu Fayı'nın havzanın kuzeydoğusundan geçmesi yörenin tektonik açıdan hareketli olmasını sağlamıştır (Duman ve Emre, 2013;Emre ve diğ., 2012). Buna bağlı olarak çalışma alanı ve çevresinde sık sık depremler meydana gelmektedir.…”