Submarine structures in the Gulf of İzmit, based on multichannel seismic reflection and multibeam bathymetry

Hülya Kurt*, Esra Yücesoy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Multichannel seismic reflection and multi-beam bathymetry data were used to study the active tectonic and syn-tectonic stratigraphic setting of the Gulf of Izmit in the Marmara Sea (Turkey). The gulf and its near surroundings are deformed by the northern strand of the dextral North Anatolian Fault. Three connected basins of the gulf, the western (Darica), central (Karamürsel) and eastern (Gölcük) basins are formed by active faults, as observed in the stacked and migrated seismic sections, as well as the bathymetry map. The main branch and its surrounding sedimentary strata are confined by normal faults to the north and south. These normal faults converge at depth towards the main fault, forming a negative flower structure in the gulf. The average maximum sedimentation rate is 0.4 mm/year according to the three most recent seismo-stratigraphic units that are located to the south of the main fault branch within the central basin. A 20° south-dipping major discontinuity along the northern shoreline of the gulf represents the top of Paleozoic basement.

Original languageEnglish
Pages (from-to)73-84
Number of pages12
JournalMarine Geophysical Researches
Volume30
Issue number2
DOIs
Publication statusPublished - 2009

Funding

Acknowledgments We thank the captain and the crew of the R/V MTA Sismik-1 for their efforts during data acquisition. We also thank İsmail Kus¸c¸u, Kerim Sarıkavak and Füsun Öcal for their help in providing seismic data. We appreciate the Department of Navigation, Hydrography and Oceanography of the Turkish Navy (SHOD) for providing eastern basin bathymetric data. The maps were produced by GMT software package (Wessel and Smith 1998). Focus (5.0) is used for seismic processing, thanks to Paradigm Geophysical for free updates. We thank Dr. Onur Tan for computational matters and Dr. Berkan Ecevitog˘lu for the contribution to the seismic data collection and processing. Special thanks to Dr. Emin Demirbag˘, Dr. Marie-Helene (Milene) Cormier, Dr. Christopher Sorlien, Dr. Okan Tüysüz, Dr. Leonardo Seeber, Dr. Namık C¸ag˘atay, Dr. Cenk Yaltırak and Dr. Luca Gasperini for their valuable constructive discussions. Comments and constructive reviews by anonymous referees and Editor in Chief Dr. Peter Clift are gratefully acknowledged. Istanbul Technical University Research Project funded this study.

FundersFunder number
Istanbul Teknik Üniversitesi

    Keywords

    • Gulf of Izmit
    • Multichannel seismic reflection data
    • North Anatolian Fault
    • Sea of Marmara

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