Naci Gorur

Istanbul Technical University ·  Department of Geological Engineering

The Sea of Marmara (SoM), located on the North Anatolian Fault, is under the risks of large earthquakes, submarine landslides and tsunamis. It is also under a serious environmental risk. The SoM is also interesting in terms of its oceanographic setting between the Mediterranean and the Black Sea, being characterized by a two-layer flow system. The...

The Sea of Marmara (SoM) is located on the North Anatolian Fault (NAF), a major transform plate bounday between the Eurasian and Anatolian plates. The SoM region is characterized by fast deformation rates (25 mm/a horizontal and 5-6 mm/a vertical), high seismic activity and steep slopes (10-29°). The most active northern branch of the NAF crosses t...

Gül Sürmelihindi, Naci Görür, M. Nami k Çağatay Faculty of Mines, EMCOL (Eastern Mediterranean Centre for Oceanography and Limnology), Istanbul Technical University, 34469 Maslak Istanbul, Turkey e-mail: surmelihindie@itu.edu.tr Geochemical and physical property proxy analyses (stable oxygen and carbon isotopes, TOC, TIC, XRF Core Scanner, MSCL) o...

The submerged section of the North Anatolian fault within the Marmara Sea was investigated using acoustic techniques and submersible dives. Most gas emissions in the water column were found near the surface expression of known active faults. Gas emissions are unevenly distributed. The linear fault segment crossing the Central High and forming a sei...

The Sea of Marmara (SoM) is a tectonically active basin being located on a major continental transform fault boundary between the Eurasian and Anatolian plates. It consists of three transtensional major subbasins in excess of -1250 m and smaller ones with -100 to -200 m forming the E-W elongated gulfs and bays. The major subbasins have steep slopes...

The Cretaceous to Miocene palaeogeographic development of Turkey in general reflects the evolution of the various oceanic branches of Neo-Tethys together with interactions between the Laurasian and Gondwanan margins. At the beginning of the Cretaceous, the first-order palaeotectonic units which make up present-day Turkey either formed parts of thes...

The deep, northern, part of the Sea of Marmara (northwestern Turkey) is composed of several aligned, actively subsiding, basins, which are the direct structural and morphological expression of the North-Anatolian Fault's northern branch. The last 20 kyr of their sedimentary fill (non-marine before 12 kyr BP) have been investigated through giant pis...

Cold seeps in the Sea of Marmara are associated with active deformation within the North Anatolian Fault system, a transcurrent plate boundary. The Marnaut cruise of Ifremer RV L'Atalante took place in May-June 2007 with objectives (1) to locate gas outflow sites through acoustic means; (2) to better define the relations between active faults and f...

The submerged portions of the North Anatolia Fault system beneath the Marmara Sea were studied with high-resolution multibeam bathymetry, subbottom profiling and sediment cores. The major objectives were to learn about the seismic and tectonic history of the fault from the stratigraphic record at a scale similar to paleoseismic studies on land and...

The catastrophic rupture of the North Anatolian Fault east of the Marmara Sea on 17 August 1999 highlighted a need for mapping the underwater extension of that continental transform. A new bathymetric map of Izmit Gulf indicates that the fault follows the axis of the gulf with a few minor bends. Submerged shorelines and shelf breaks that formed dur...

The North Anatolian Fault (NAF) is a major continental transform system that extends E–W across Turkey for over 1600 km, separating the Anatolian and Eurasian plates. A portion of its northern branch runs below the Sea of Marmara. This portion constitutes a “seismic gap” because the last destructive earthquakes occurred at the western (1912 Ganos e...

High-resolution multibeam bathymetry data acquired during two recent surveys clearly highlight the trace of the North Anatolian Fault beneath Izmit Gulf. The fault follows the approximate axis of the Darica (Western) Basin and the Karamürsel (Central) Basin, and has an overall orientation consistent with Present relative plate motion documented by...

The disastrous 1999 earthquakes in Turkey have spurred the international community to study the geometry and behavior of the North Anatolian Fault (NAF) beneath the Marmara Sea. While the area is considered mature for a large earthquake, the detailed fault geometry below the Marmara Sea is uncertain, and this prevents a realistic assessment of seis...

Stratigraphic analysis of Late Quaternary sediments of the Sea of Marmara Basin (SMB) indicates that it was a freshwater lake during the late glacial to ca 12,000 yr BP, depositing sediments with a Neoeuxinian fauna characteristic of the Black Sea Basin. At ca 12,000 yr BP, it was inundated by the Mediterranean waters and gradually converted into a...

The Neogene marginal succession of the Eastern Paratethys (EP) crops out along the southern Black Sea coast and in the Marmara region of Turkey, and provides important clues to the tectono-sedimentary and palaeoceanographic conditions. In the Tarkhanian stage, the southern margin of the EP basin was largely a carbonate platform covered by warm, mar...

During latest Quaternary glaciation, the Black Sea transformed itself in to a vast freshwater lake. Recently acquired high-resolution seismic, reflection profiles and sediment cores offshore Russia, Bulgaria and the Ukraine indİcate that ıhe surface of this lake had drawn down to levels below its outlet prior to glacial melt-water pulse MWPl around...

Abstract Palaeogeographic studies suggest that the main mammal migration to Anatolia started in the late early to middle Miocene, following the closure of the Bitlis Ocean in southeastern Turkey. These animals, including hominoids, were able to migrate over the land bridge thus formed to Central and Western Anatolia where they settled. We discuss...

The sediments of the Gildirli Formation in the Karaisali embayment of the Adana Basin, southern Turkey, records the evolution, under tectonic control at a complex triple junction, of an alluvial fan into a fan-delta during a rapid Early Miocene transgression. The alluvial fan is represented by the lower part of the formation (Çakmak Member) and is...

The Tuzgölü basin complex represents a cluster of epi-sutural depressions nested on the Ankara Knot in central Anatolia, where several sutures converge. The basin complex consists mainly of two sub-basins, the Haymana and the Tuzgölü (s.s.) depressions. During the Late Cretaceous to the Late Palaeocene, the Tuzgölü and the Haymana sub-basins evolve...

Permian-Jurassic rifting of northwestern Australia resulted in the development of a passive continental margin flanking the northeastern Indian Ocean. On this margin the relatively thin synrift to postrift sedimentary sequence of southern Exmouth Plateau was drilled during ODP Leg 122. A sequence-stratigraphy analysis of the complete Mesozoic-Cenoz...

Since the Tortonian (11 Ma), the tectonics of Turkey has been dominated by its escape westward from the east Anatolian collision zone onto the oceanic lithosphere of the eastern Mediterranean, mainly along the north and east Anatolian transform faults (NAT and EAT), and at least two other southeast-concave strike-slip faults that branch off the NAT...