Northern segment of the North Anatolian Fault in the Gulf of Izmit inferred from marine magnetic anomalies
The Gulf of İzmit is a critical basin in assessment of the kinematics of the North Anatolian Fault (NAF) at the eastern margin of the Sea of Marmara. The available seismic reflection data do not provide sufficient and clear evidences to outline the deeper structures because of limited penetration. I...
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| creator | Demirel, Sinan Alpar, Bedri Yaltırak, Cenk Vardar, Denizhan Kurt, Hülya |
| description | The Gulf of İzmit is a critical basin in assessment of the kinematics of the North Anatolian Fault (NAF) at the eastern margin of the Sea of Marmara. The available seismic reflection data do not provide sufficient and clear evidences to outline the deeper structures because of limited penetration. In agreement with the known main tectonic elements from available seismic data and multi-beam bathymetry, new magnetic data gathered within the scope of this study show E–W trending anomalies and permit us to outline satisfactorily the deeper tectonic setting of the gulf region. The northern strand of the NAF can be evidently correlated with the maxima on the magnetic profiles, implying a significant thinning in the crust along the weakness zone placed between the Istanbul Zone and Karakaya Complex. Such a tectonic structure must have been formed as parallel transform strike-slip pressure, which is different from the characteristic negative-flower structure observed at the East Marmara trough. This pattern occurs in a relatively narrow zone, because it has been superimposed on a paleo-tectonic lineament. |
| doi_str_mv | 10.1007/s11001-020-09399-6 |
| format | Article |
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The available seismic reflection data do not provide sufficient and clear evidences to outline the deeper structures because of limited penetration. In agreement with the known main tectonic elements from available seismic data and multi-beam bathymetry, new magnetic data gathered within the scope of this study show E–W trending anomalies and permit us to outline satisfactorily the deeper tectonic setting of the gulf region. The northern strand of the NAF can be evidently correlated with the maxima on the magnetic profiles, implying a significant thinning in the crust along the weakness zone placed between the Istanbul Zone and Karakaya Complex. Such a tectonic structure must have been formed as parallel transform strike-slip pressure, which is different from the characteristic negative-flower structure observed at the East Marmara trough. 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The available seismic reflection data do not provide sufficient and clear evidences to outline the deeper structures because of limited penetration. In agreement with the known main tectonic elements from available seismic data and multi-beam bathymetry, new magnetic data gathered within the scope of this study show E–W trending anomalies and permit us to outline satisfactorily the deeper tectonic setting of the gulf region. The northern strand of the NAF can be evidently correlated with the maxima on the magnetic profiles, implying a significant thinning in the crust along the weakness zone placed between the Istanbul Zone and Karakaya Complex. Such a tectonic structure must have been formed as parallel transform strike-slip pressure, which is different from the characteristic negative-flower structure observed at the East Marmara trough. 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| subjects | Anomalies Basins Bathymetry Earth and Environmental Science Earth Sciences Fault lines Geophysics/Geodesy Kinematics Magnetic anomalies Magnetic data Oceanography Offshore Engineering Original Research Paper Profiles Sediments Seismic data Seismological data |
| title | Northern segment of the North Anatolian Fault in the Gulf of Izmit inferred from marine magnetic anomalies |
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