Akademik Veri Yönetim Sistemi
74. Türkiye Jeoloji Kurultayı, Ankara, Türkiye, 11 - 15 Nisan 2022, ss.22
The Sea of Marmara is one of the most important active tectonic areas
under the influence of many faults belonging to the North Anatolian
Fault Zone (NAF), one of the most active tectonic structures of Turkey.
It is known that the NAF is divided into three branches named as
North, Middle and Southern branches within the Sea of Marmara.
Among these branches, the middle branch fault system extends along
the southern shelf of the Sea of Marmara and is distributed over the
entire shelf from the west to the east. Therefore, the south of the
Marmara Sea is at least as important as the northern part and has the
potential to produce earthquakes. The study area covers the Erdek Bay,
located in the west of the Kapıdağ Peninsula in the southwest of the
Marmara Sea, and the region between the Marmara Island and Kapıdağ
Peninsula. Therefore, the study area is under the influence of the North
Anatolian Fault. Today, the models of the Marmara Sea are still the
subject of the discussions by many researchers. Especially, the idea
that the main fault passes from the north has been revealed by many
researchers and the majority of the attention has been drawn on this
main branch. However, this fault system, which has a very complex
structure in the Marmara Sea, has many effects in the southern part
also. Although there are a lot of researchs about the tectonics of the
Northern branch and the general Marmara Sea, studies for the southern
region are very limited.
In this study, in order to reveal the tectonic structure of the south of the
Marmara Sea in 2013 and 2014, multichannel seismic and sparker
seismic reflection datasets collected within the scope of the TUBİTAK
112Y026 (NSF-TÜBİTAK) project named as SoMAR, jointly
conducted by the Institute of Marine Sciences and Technology of
Dokuz Eylül University and the Institute of Lamont-Doherty Earth
Observatory of Columbia University.
In the northern part of the study area, there is a fault system called the
Kapıdağ Fault and has strike-slip characteristics. Within the scope of
the study, it is aimed to reveal the direction of this fault system in the
region in detail. One of the aims of the study is to create a fault map of
the Erdek Bay of the Sea of Marmara and to reveal the activity of these
faults since late Quaternary time. The acoustic basement is observed
in almost all of the study area. The acoustic basement observed at
shallower depths in the south is cut by many faults.The tectonics of
this region are also studied in detail, including shallow faults and
deeper faults that can be traced to the basement. These faults are
mapped among themselves as active and inactive faults. In addition, to
the extent that it can be observed, the horizons on the acoustic
basement are also interpreted stratigraphically.