Fault Activity in the Anatolia, Arabia, Africa Triple Junction Region


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Karataş A.

Seismotectonics of the East Mediterranean-Red Sea region, Hamimi Zakaria, Editör, Springer, Zug, ss.83-111, 2025

  • Yayın Türü: Kitapta Bölüm / Araştırma Kitabı
  • Basım Tarihi: 2025
  • Yayınevi: Springer
  • Basıldığı Şehir: Zug
  • Sayfa Sayıları: ss.83-111
  • Editörler: Hamimi Zakaria, Editör
  • Marmara Üniversitesi Adresli: Evet

Özet

The correct tectonic, geomorphological, and geodynamic interpretation of the Anatolia-Arabia-Africa triple junction has a key role in both understanding the plate dynamics in the area where these three plates come closest to each other and in explaining the regional seismotectonics. However, despite many studies over many years, an agreed upon model has not yet been developed and a satisfactory explanation has not been provided. This is due to the fact that the region has been very active in the tectonic sense in the recent geological background, and that it does not exhibit a simple, flat, and easily identifiable geometry in terms of plate boundaries. The main purpose of this study is to make a strong contribution by adding the geomorphological and paleogeographical perspective to the studies aimed at analyzing this problematic area with classical and modern geological, geophysical, and seismological methods in the literature. Within the methodological framework based on the interpretation of the data obtained to date together with the tectonic geomorphology of the field, a new perspective and seismotectonic interpretations based on different tectonic models have been included, and the blurred image of the triple junction has been tried to be clarified. During the study, it was clearified that different findings and explanations regarding the kinematics, localization and correlation of the faults in the field were the main handicaps in revealing the geometry of the triple junction. In this context, a comprehensive literature research was conducted and the existing information was re-evaluated in the light of current findings and spatial parameters. As a result, it is not possible for the Anatolian, Arabian and African plates to come into contact at a single point; It has been understood that the blocks that broke away from the Anatolian Plate since the Plio-Pleistocene formed a barrier between the current Anatolian Plate, whose southern border is formed by the East Anatolian Fault Zone, and the African Plate subducting along the Cyprus Arc, thus cutting the connection between the two plates in this region. In addition, it has been pointed out that the westward escape of the Anatolian Plate, which has undergone severe internal deformation, to escape the stress between the Arabian and Eurasian plates, continues to occur with new tectonic lines developing further north, as in the model presented in this study, and the Anatolian Plate is very close to losing its appearance as a rigid plate by separating into completely independent blocks. This situation became especially evident with the earthquakes of February 6, 2023, which also revealed that conditions under which the southern boundary of the Anatolian Plate may need to be redefined have prevailed in the region.