Akademik Veri Yönetim Sistemi
TURKIYE JEOLOJI BULTENI-GEOLOGICAL BULLETIN OF TURKEY, cilt.51, sa.2, ss.91-114, 2008 (ESCI, TRDizin)
Izmir Bay, one of the recent structures of Westen Anatolia, is a marine basin controlled by NE, NW, N-S and E-W trending active faults. The southern sector of the bay is bounded by the Izmir Fault, lying between Konak and Guzelbahce village. The Izmir Fault in this section is made up of two main segments trending approximately in an E-W direction, and is mapped on a 1/25000 scale from Balcova to Guzelbahce Village. According to field studies, the Izmir Fault is an oblique-slip normal fault dipping to the north. The northern sector of the bay between Bayrakli and Karsiyaka districts is bounded by the Karsiyaka Fault, which is antithetic to the Izmir Fault. In this section, the Karsiyaka Fault is characterised by an oblique-slip normal fault dipping to the North. The Seferihisar Fault, which is approximately developed and normal to the Izmir Fault, and has been mapped from Sigacik Bay to Guzelbahce-Yelki district, forms the eastern margin of the Urla basin. The segment of the Seferihisar Fault that lies between Sigacik Bay and Yelki Village is in the form of a N20E trending right-lateral strike-slip fault. The 5 km length of the fault segment lying between Yelki and Guzelbahce trends in a N50E direction and, beginning from Guzelbahce village, is transformed into the Izmir Fault toward the northeast. Within the excavated trenches on the fault segments mapped on a 1/1000 scale, it is established that the strike-slip fault (Seferihisar Fault) is transformed by bending into the normal fault (the Izmir Fault). Kinematic analysis carried out at 9 stations suggest that the paleostress forming the faults has controlled under an approximately N-S extensional direction associated with an E-W contraction. The data support that the kinematically linked Izmir Fault, Seferihisar Fault and Karsiyaka Fault contributed to the opening of Izmir Bay as a response to the transtensional forces.