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Kocaeli University, Engineering Faculty, Dept. of Geological Engineering, Kocaeli, TR 41100, Turkey
* Author for correspondence: ofgurer{at}kou.edu.tr
This study reports on the geometric and structural characteristics of the North Anatolian Fault Zone in the southwest Marmara region. The geometric and kinematic features of the faults in the region are described, based on field observations. In addition, the Neogene and Quaternary basin fill which occupies large areas in the region has been determined, and the tectonic regimes controlling these basins are explained. The neotectonic regime is also explained considering different deformation phases affecting the region. The NS extension and EW strike-slip have affected the region possibly since the latest PlioceneQuaternary. Field observations show that these extensional tectonics around the south Marmara region are related to right strike-slip on the EW North Anatolian fault zone and the NS Aegean extensional system. The faults in this zone trend approximately EW in the eastern part of the region and NESW towards the west of the region, indicating that they accommodate rotation in addition to differential movement between adjacent blocks.
Key Words: Strike-slip faults transtension kinematics Marmara region active faults Turkey
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