... Trangressif başlayıp regresif sona eren bu istifin deniz içindeki devamı Çatal ve Hersek delt... more ... Trangressif başlayıp regresif sona eren bu istifin deniz içindeki devamı Çatal ve Hersek deltalarında bulunur ... Yaltırak, 2002; Kuşçu ve diğ., 2002; Amorosi, 2002; Cormier ve diğ., 2003; Çağatay ve diğ., 2003; Gasperini ve diğ., 2003; Polonia ve diğ., 2004) hiçbirinde yeri olmayan ...
Proceedings of the ICE - Water and Maritime Engineering, 2003
Page 1. Effects of the eastern Marmara Earthquake on marine structures and coastal areas Y. Yukse... more Page 1. Effects of the eastern Marmara Earthquake on marine structures and coastal areas Y. Yuksel, B. Alpar, AC Yalciner, E. Cevik, O. Ozguven and Y. Celikoglu ... Esin Cevik Associate Professor, Department of Civil Engineering, Yildiz Technical University, Turkey ...
ABSTRACT On the basis of new swath bathymetric and high-resolution sparker reflection data, Quate... more ABSTRACT On the basis of new swath bathymetric and high-resolution sparker reflection data, Quaternary tectonic and sedimentary history of the Aegean continental shelf area between the gulfs of Saros and Edremit was investigated. These gulfs accommodate two complex neotectonic structures which control the major geodynamic processes in the region; these are the northern and middle strands of the North Anatolian fault (NAF), respectively. A mature erosion surface, partially intersected by some vertical faults, can indeed be interpreted from the clear reflections over the Miocene basement, which is represented by various folded layers. This acoustical surface forms the base level of deposition for the studied shelf area and overlain by various depositional basins elongated between the gulfs of Saros and Edremit. Depending on the global sea level changes, water exchange between the seas of Mediterranean and Marmara, and partly on some terrestrial inputs, these basins have been developed. Sea-level decreased during the glacial stages while the Mediterranean conditions prevailed during the interglacial stages. As evidenced from the formation of the Pleistocene coastal terraces in the Canakkale (Dardanelles) Strait region and under the control of compressional forces along the NAF zone a regional uplift of 0.2-0.9 mm per year is another major component in the tectonic history. The depositional units over the mature Pliocene erosion surface were mainly controlled by the fluvial discharges of the Karamenderes paleo-river and some others during the postglacial times, by sea-level oscillations which determined the proximity of basins to river mouths, and by oceanographic conditions. A rise in basement has been traced at 60-65 m below the modern sea level which has been played an important role in the sediment transportation occurred at the exit of the Canakkale Strait. The folded layers above the acoustical basement coincide with the development of the transpressional Anafartalar thrust fault on the Gelibolu Peninsula (upper Pliocene - lower Pleistocene). The faults cutting through these folded layers are strike-slip in character and in nature most faulting occurs on pre-existing normal faults. Folded layers observed in recent deltaic sequences indicate deformational forces are still active in the region, under the control of regional block rotations.
ABSTRACT Seasonal variations of the cold intermediate water (CIW) in the southwestern Black Sea a... more ABSTRACT Seasonal variations of the cold intermediate water (CIW) in the southwestern Black Sea and its entrance into the Strait of Istanbul (Bosphonts) within the upper layer flow have been studied by using monthly oceanographic data sets collected in 1996-1998 period. In addition, the advection of the CIW via Strait Of Istanbul to the Sea of Marmara has been investigated. The CIW is a permanent and characteristic water mass of the Black Sea, markedly observed in the northwestern Black Sea. It is transported with the Rim Current along the boundary of the basin. The average temperature of the CIW is about 6° C. The 8° C isotherms defines its upper and lower boundaries. The upper boundary of CIW rises up to the 20 m depth in the shelf and coastal upwelling regions with a thickness of 40 m. On the other hand, the depth of the upper boundary may decrease down to 40 m with a thickness of 120 m in the anticyclonic regions. The CIW, located between 30 and 65m depths, was observed from April to September at the northern approaches of the Strait of Istanbul in the Black Sea. However, the CIW, within the Black Sea's upper layer flow, does not enter into the strait in the beginning (April, May) and at the end (September) of this period. The CIW between 20 and 50m water depths was observed in the northern entrance of the strait in summer (June, July and August) and it was carried into the strait by the southbound surface current. Its temperature increases southwards along the strait, due to the mixing with the warmer surface and bottom layers. This increment ranges between 2 and 4° C depending on the rate of mixing. The physically altered waters enter the Sea of Marmara with temperature of 11-14° C. In the Sea of Marmara, a residual cold intermediate layer (CIL) is observed in summer, it is just placed on top of the halocline. The average temperature of the upper layer increases from spring to autumn. In some months, however, there is a decrement in the average temperature of the upper layer. The altered CIW waters entering the Sea of Marmara may be responsible for this cooling.
... Trangressif başlayıp regresif sona eren bu istifin deniz içindeki devamı Çatal ve Hersek delt... more ... Trangressif başlayıp regresif sona eren bu istifin deniz içindeki devamı Çatal ve Hersek deltalarında bulunur ... Yaltırak, 2002; Kuşçu ve diğ., 2002; Amorosi, 2002; Cormier ve diğ., 2003; Çağatay ve diğ., 2003; Gasperini ve diğ., 2003; Polonia ve diğ., 2004) hiçbirinde yeri olmayan ...
Proceedings of the ICE - Water and Maritime Engineering, 2003
Page 1. Effects of the eastern Marmara Earthquake on marine structures and coastal areas Y. Yukse... more Page 1. Effects of the eastern Marmara Earthquake on marine structures and coastal areas Y. Yuksel, B. Alpar, AC Yalciner, E. Cevik, O. Ozguven and Y. Celikoglu ... Esin Cevik Associate Professor, Department of Civil Engineering, Yildiz Technical University, Turkey ...
ABSTRACT On the basis of new swath bathymetric and high-resolution sparker reflection data, Quate... more ABSTRACT On the basis of new swath bathymetric and high-resolution sparker reflection data, Quaternary tectonic and sedimentary history of the Aegean continental shelf area between the gulfs of Saros and Edremit was investigated. These gulfs accommodate two complex neotectonic structures which control the major geodynamic processes in the region; these are the northern and middle strands of the North Anatolian fault (NAF), respectively. A mature erosion surface, partially intersected by some vertical faults, can indeed be interpreted from the clear reflections over the Miocene basement, which is represented by various folded layers. This acoustical surface forms the base level of deposition for the studied shelf area and overlain by various depositional basins elongated between the gulfs of Saros and Edremit. Depending on the global sea level changes, water exchange between the seas of Mediterranean and Marmara, and partly on some terrestrial inputs, these basins have been developed. Sea-level decreased during the glacial stages while the Mediterranean conditions prevailed during the interglacial stages. As evidenced from the formation of the Pleistocene coastal terraces in the Canakkale (Dardanelles) Strait region and under the control of compressional forces along the NAF zone a regional uplift of 0.2-0.9 mm per year is another major component in the tectonic history. The depositional units over the mature Pliocene erosion surface were mainly controlled by the fluvial discharges of the Karamenderes paleo-river and some others during the postglacial times, by sea-level oscillations which determined the proximity of basins to river mouths, and by oceanographic conditions. A rise in basement has been traced at 60-65 m below the modern sea level which has been played an important role in the sediment transportation occurred at the exit of the Canakkale Strait. The folded layers above the acoustical basement coincide with the development of the transpressional Anafartalar thrust fault on the Gelibolu Peninsula (upper Pliocene - lower Pleistocene). The faults cutting through these folded layers are strike-slip in character and in nature most faulting occurs on pre-existing normal faults. Folded layers observed in recent deltaic sequences indicate deformational forces are still active in the region, under the control of regional block rotations.
ABSTRACT Seasonal variations of the cold intermediate water (CIW) in the southwestern Black Sea a... more ABSTRACT Seasonal variations of the cold intermediate water (CIW) in the southwestern Black Sea and its entrance into the Strait of Istanbul (Bosphonts) within the upper layer flow have been studied by using monthly oceanographic data sets collected in 1996-1998 period. In addition, the advection of the CIW via Strait Of Istanbul to the Sea of Marmara has been investigated. The CIW is a permanent and characteristic water mass of the Black Sea, markedly observed in the northwestern Black Sea. It is transported with the Rim Current along the boundary of the basin. The average temperature of the CIW is about 6° C. The 8° C isotherms defines its upper and lower boundaries. The upper boundary of CIW rises up to the 20 m depth in the shelf and coastal upwelling regions with a thickness of 40 m. On the other hand, the depth of the upper boundary may decrease down to 40 m with a thickness of 120 m in the anticyclonic regions. The CIW, located between 30 and 65m depths, was observed from April to September at the northern approaches of the Strait of Istanbul in the Black Sea. However, the CIW, within the Black Sea's upper layer flow, does not enter into the strait in the beginning (April, May) and at the end (September) of this period. The CIW between 20 and 50m water depths was observed in the northern entrance of the strait in summer (June, July and August) and it was carried into the strait by the southbound surface current. Its temperature increases southwards along the strait, due to the mixing with the warmer surface and bottom layers. This increment ranges between 2 and 4° C depending on the rate of mixing. The physically altered waters enter the Sea of Marmara with temperature of 11-14° C. In the Sea of Marmara, a residual cold intermediate layer (CIL) is observed in summer, it is just placed on top of the halocline. The average temperature of the upper layer increases from spring to autumn. In some months, however, there is a decrement in the average temperature of the upper layer. The altered CIW waters entering the Sea of Marmara may be responsible for this cooling.
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