摘要
Of single channel, 70 km, and 900 km of multi-channel seismic reflection data show that x130;zmir Gulf and surrounding regions are widely deformed by N–S to NE–SW trending active transpressional strike-slip faults, reverse faults and some E–W normal faults. Normal faults are mapped offshore Karaburun–Foça, in inner part of x130;zmir Gulf; offshore Alaçatx131;–Teke and offshore Kuşadasx131; delimiting the southern scarp of Lesvos basin, x130;zmir basin, northern scarp of Ikaria basin and continuation of Küçük Menderes Graben, respectively. Normal faults are cut by strike-slip faults. The major strike-slip faults are the N–S oriented Karaburun reverse fault bordering x130;zmir Gulf on the west and uplifting the Karaburun Peninsula and the NE–SW oriented strike-slip Tuzla Fault extending from Doğanbey Promontory towards Seferihisar ridge onland. This fault pattern can be explained by pure-shear model indicating that the area is under E–W compression, N–S extension, NE–SW and NW–SE strike-slip deformation. Moreover, Tuzla Fault has a regional importance. It separates NE–SW trending structures of the study area from E–W oriented Gediz and Küçük Menderes grabens and probably continues towards to x130;znik at north constituting a transition zone between northern transpressional region and southern extensional region in the western Anatolia–Aegean Sea.