The active fault pattern based on morphotectonic and structural data in the south of Ulubat Lake and the Susurluk valley along the southern branch of North Anatolian Fault Zone: A criticism of the bend model in northwest Anatolia
Instead, we suggest that the faults belonging to the southern branch of the North Anatolian Fault Zone extend to Akhisar and İzmir via Bursa, Susurluk, and Balıkesir.
📌 3 Key Takeaways
🎯
Objective & Hypothesis:Field observations and morphotectonic evaluations on the south of Ulubat Lake and the Susurluk valley show that the dominant active fault pattern consists of northeast-southwest and east northeast-west southwest right-lateral faults and northwestsoutheast normal faults developing between these strike-slip faults.
📊
Key Findings & Data:We redefined the active faults in the south of Ulubat Lake and discovered that these northeast-southwest right-lateral faults control the route of Susurluk River.
💡
Conclusion & Impact:Instead, we suggest that the faults belonging to the southern branch of the North Anatolian Fault Zone extend to Akhisar and İzmir via Bursa, Susurluk, and Balıkesir.
🔬Design:Lab & Field Experiment
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters
Abstract
Field observations and morphotectonic evaluations on the south of Ulubat Lake and the Susurluk valley show that the dominant active fault pattern consists of northeast-southwest and east northeast-west southwest right-lateral faults and northwestsoutheast normal faults developing between these strike-slip faults. We redefined the active faults in the south of Ulubat Lake and discovered that these northeast-southwest right-lateral faults control the route of Susurluk River. Based on these discoveries and evaluations, we can claim that the “bend model” previously proposed for the region is not valid, as seen in the Mustafakemalpaşa Fault and Balıkesir-Kepsut Fault examples. Instead, we suggest that the faults belonging to the southern branch of the North Anatolian Fault Zone extend to Akhisar and İzmir via Bursa, Susurluk, and Balıkesir.
🔖
Cite This Article
SEYİTOĞLU, G., ESAT, K. (2022). The active fault pattern based on morphotectonic and structural data in the south of Ulubat Lake and the Susurluk valley along the southern branch of North Anatolian Fault Zone: A criticism of the bend model in northwest Anatolia. Turkish Journal of Earth Sciences, Cilt: 31 - Sayı: 2, 137–152. https://ajindex.com/articles/602889
Allmendinger RW, Cardozo NC, Fisher D (2012). Structural Geology Algorithms: Vectors and Tensors. Cambridge University Press, 289p. Barka A (1992). The North Anatolian Fault Zone. Annales Tectonicae 6: 164-195.
Barka A, Kadinsky-Cade K (1988). Strike-slip fault geometry in Turkey and its influence on earthquake activity. Tectonics 7: 663-684.
Barrier E, Chamot-Rooke N, Giordano G (2004). Geodynamic Maps of the Mediterranean-sheet 1: Tectonics and Kinematics. Commission for the Geological map of the World (CGMW) and UNESCO. Caputo R, Pavlides S (2013). The Greek database of seismogenic sources (GreDaSS), version 2.0.0: A compilation of potential seismogenic sources (Mw>5.5) in the Aegean Region. http://gredass.unife.it/,doi: 10.15160/unife/gredass/0200. Crampin S, Evans R (1986). Neotectonics of the Marmara Sea region of Turkey. Journal of the Geological Society London 143: 343-348.
Emre Ö, Doğan A, Özalp S, Yıldırım C (2011a). 1:250.000 Scale Active Fault Map Series of Turkey, Bandırma (NK 35-11b) Quadrangle. Serial Number 3, General Directorate of Mineral Research and Exploration, Ankara-Turkey Emre Ö, Doğan A, Duman TY, Özalp S (2011b). 1:250,000 Scale Active Fault Map Series of Turkey, Bursa (NK 35-12) Quadrangle. Serial Number 9, General Directorate of Mineral Research and Exploration, Ankara-Turkey. Emre Ö, Duman TY, Özalp S (2011c). 1:250,000 Scale Active Fault Map Series of Turkey, Kütahya (NJ 35-4) Quadrangle. Serai Number 10, General Directorate of Mineral Research and Exploration, AnkaraTurkey. Emre Ö, Doğan A, Özalp S (2011d). 1:250.000 Scale Active Fault Map Series of Turkey, Balıkesir (NJ 35-3) Quadrangle. Serial Number 4, General Directorate of Mineral Research and Exploration, AnkaraTurkey. Emre Ö, Duman TY, Özalp S, Elmacı H, Olgun Ş, Şaroğlu F (2013). Active Fault Map of Turkey with and Explanatory Text 1:1,250,000 scale. General Directorate of Mineral Research and Exploration, Special Publication Series 30. Emre Ö, Duman TY, Özalp S, Şaroğlu F, Olgun Ş et al. (2018). Active fault database of Turkey. Bulletin of Earthquake Engineering 16: 3229- 3275. Karabacak V, Sancar T, Sağlam Selçuk A, Büyükdeniz Y (2021a). Paleoseismicity of the Ulubat Fault: Inferences on Seismic Behaviour of the Southern Branch of the North Anatolian Fault Zone, South Marmara. Turkish Journal of Earthquake Research 3: 1-19.
Karabacak V, Sançar T, Yıldırım G, Uysal IT (2021b). When did the North Anatolian fault reach southern Marmara, Turkey? Geology: https:// doi.o