Discussion of the Fault Models of the Northern Marmara Shelf and the Lagoon Küçükçekmece with New Marine Magnetic Data, Turkey

Abstract

580-km length marine magnetic study was performed at the Northern Marmara Shelf and the Lagoon Küçükçekmece to providenew datasets to understand the submarine structures. The distributions of the relatively complex and differentiated low and highmagnetic anomalies indicate that the study area was affected by the multiple tectonic regimes. While the magnetic highscorrespond with the folding structures, magnetic low anomalies well match with the lineaments determined from the seismicprofiles.Magnetic anomalies support an E-W trending fault, controlling the anticlinorium systemand NNE-SSWfaults related tothe compressional tectonics. These magnetic structures might be associated with Thrace Eskisehir Fault Zone, an older rightlateralstrike-slip fault, which was the most dominant tectonic element before the North Anatolian Fault Zone. In addition to threeappx, N-S trending faults are defined beneath the Lagoon Küçükçekmece from the total and residual magnetic anomaly grids