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Articles 211 - 240 of 917
Full-Text Articles in Earth Sciences
Geochemistry And U-Pb Ages From The Kösdağ Metavolcanics In The Southern Central Pontides (Turkey): Complementary Data For Early Late Cretaceous Island Arc Development In The Northern Neotethys, Faruk Berber, Kaan Sayit, Mehmet Cemal Göncüoğlu
Geochemistry And U-Pb Ages From The Kösdağ Metavolcanics In The Southern Central Pontides (Turkey): Complementary Data For Early Late Cretaceous Island Arc Development In The Northern Neotethys, Faruk Berber, Kaan Sayit, Mehmet Cemal Göncüoğlu
Turkish Journal of Earth Sciences
The Kösdağ Metavolcanics (KMs) in the southern Central Pontides are exposed between the İzmir-Ankara-Erzincan Suture Belt in the south and the Sakarya Composite Terrane in the north. They comprise an approximately 40-km-long tectonic unit, bounded by the splays of the North Anatolian Transform Fault in the north and the Kızılca Thrust in the south. The basement of the unit mainly consists of metabasalts, metaandesites, and metarhyolites, with well-developed blastomylonitic textures, which are interlayered by recrystallized pelagic limestone and chert. Late Cretaceous pelagic limestones of the Dikmen Formation disconformably overlie the basement. Geochemically, the KMs exhibit enrichment in Th and La …
Present Day Strike-Slip Deformation Within The Southern Part Of The İzmir-Balıkesirtransfer Zone Based On Gnss Data And Implications For Seismic Hazard Assessment Inwestern Anatolia, Eda Esma Eyübagi̇l, Hali̇l İbrahi̇m Solak, Umre Seli̇n Kavak, İbrahi̇m Ti̇ryaki̇oğlu, Hasan Sözbi̇li̇r, Bahadir Aktuğ, Çağlar Özkaymak
Present Day Strike-Slip Deformation Within The Southern Part Of The İzmir-Balıkesirtransfer Zone Based On Gnss Data And Implications For Seismic Hazard Assessment Inwestern Anatolia, Eda Esma Eyübagi̇l, Hali̇l İbrahi̇m Solak, Umre Seli̇n Kavak, İbrahi̇m Ti̇ryaki̇oğlu, Hasan Sözbi̇li̇r, Bahadir Aktuğ, Çağlar Özkaymak
Turkish Journal of Earth Sciences
Herein, a combined analysis of Global Navigation Satellite System-derived strain rate maps, in accordance with recent seismicity, was presented to reveal that the N-S extension is accommodated primarily by strike-slip faulting of the İzmir-Balıkesir Transfer Zone (İBTZ), where a counter clockwise rotation (~25-100°/Myr) along the vertical axis is dominant. The results indicated that strike-slip segments within the İBTZ show variable transport sense and amount of slip along them, and they connect by hard linkage relay ramps with the dip to oblique slip normal faults. According to the strain map, the Karaburun Peninsula has the largest strain rates, at 137 nano …
Active Tectonic Stress Field Analysis In Nw Iran-Se Turkey Using Earthquake Focalmechanism Data, Ahad Nouri Mokhoori, Behnam Rahimi, Mohsen Moayyed
Active Tectonic Stress Field Analysis In Nw Iran-Se Turkey Using Earthquake Focalmechanism Data, Ahad Nouri Mokhoori, Behnam Rahimi, Mohsen Moayyed
Turkish Journal of Earth Sciences
NW Iran-SE Turkey is a tectonically active zone related to the Arabia-Eurasia convergence, but the active stress state in this zone has not yet been clearly studied. To improve the knowledge of present-day stress state in this region, optimum reduced stress tensor was analysed. For this, a large number of earthquake focal mechanisms (277) were collected. The analyses show most mechanisms exhibit strike-slip to thrust faulting. These data indicate that this region is dominated by an N158° maximum horizontal compressive stress (SHmax) belonging to a transpressional tectonic regime. In the scale of the study area, the relative magnitude of the …
Dictyoconus Aydimi (Gallardo-Garcia And Serra-Kiel, 2016) Comb. Nov., Larger Benthicforaminifera From The Middle-Upper Eocene Of The Middle East (Se Turkey, Iraq, Swiran, Oman): New Evidence For Arabian Plate Faunal Provincialism, Nazi̇re Özgen Erdem, Felix Schlagintweit, Derya Si̇nanoğlu
Dictyoconus Aydimi (Gallardo-Garcia And Serra-Kiel, 2016) Comb. Nov., Larger Benthicforaminifera From The Middle-Upper Eocene Of The Middle East (Se Turkey, Iraq, Swiran, Oman): New Evidence For Arabian Plate Faunal Provincialism, Nazi̇re Özgen Erdem, Felix Schlagintweit, Derya Si̇nanoğlu
Turkish Journal of Earth Sciences
Rogerella aydimi Gallardo-Garcia and Serra-Kiel was described from the Priabonian Haluf Member of the Aydim Formation, Oman. Based on new finds from the Bartonian Hoya Formation of SE Turkey and the Jahrum Formation of Iran, its taxonomic status is discussed herein. It is concluded that it represents a species of Dictyoconus with a simple subepidermal network (1 rafter, 1 intercalary beam) below a thin epiderm. The stratigraphic range of D. aydimi known thus far is Bartonian-Priabonian or Shallow Benthic Zone 17- 20. The distribution of D. aydimi gives further evidence for a Middle-Late Eocene faunal provincialism of the Arabian Plate …
Stacked Debris Flows Offshore Sakarya Canyon, Western Black Sea: Morphology, Seismiccharacterization And Formation Processes, Derman Dondurur, Aslihan Nasif
Stacked Debris Flows Offshore Sakarya Canyon, Western Black Sea: Morphology, Seismiccharacterization And Formation Processes, Derman Dondurur, Aslihan Nasif
Turkish Journal of Earth Sciences
Analysis of ca. 1400 km of multichannel seismic data indicate that the distal part of the Sakarya Canyon within the continental rise is an unstable region with sediment erosion. Fourteen buried debris flows (DB1-DB14), in the stacked form within Plio-Quaternary sediments between 1400 and 1950 m water depth, were observed in the surveyed area. Their run-out distances range from 3.8 to 24.4 km. The largest debris flow DB10 affects ca. 225 km2 surficial area transporting ca. 15 km3 of sediment in S to N direction. The debris flows in the area are considered as gravity flows of unconsolidated sediments mobilized …
Mineralogical And Gemmological Characteristics Of Garnets Associated With Xenoliths Within Trachyte Dome, Hisarlıkaya (Ankara), Central Anatolia, Turkey, Eli̇f Varol Muratçay, Si̇bel Tatar Erkül, Güllü Deni̇z Külahci
Mineralogical And Gemmological Characteristics Of Garnets Associated With Xenoliths Within Trachyte Dome, Hisarlıkaya (Ankara), Central Anatolia, Turkey, Eli̇f Varol Muratçay, Si̇bel Tatar Erkül, Güllü Deni̇z Külahci
Turkish Journal of Earth Sciences
Garnet-bearing xenoliths are observed within a trachytic dome extrusion in the Hisarlıkaya region (Ankara). These garnets exhibiting greenish-reddish-dark brown colour and ranging in sizes up to 1 cm were examined in terms of mineralogical, geochemical, and gemmological characteristics. Mineralogical studies indicate that these garnets (And88-93 Grs7-12) are linked to solid solution series, which are dominantly andradite with lower content of grossular. According to major, trace, and rare earth element (REE) analysis, the representative garnet crystal shows high CaO, Fe2O3, Al2O3, MgO, MnO, V, W, and light rare earth elements (LREE) concentrations. These high concentrations might indicate the mobility of these …
Luminescence Dating Of Quaternary Marine Terraces From The Coastal Part Of Eastern Black Sea And Their Tectonic Implications For The Eastern Pontides, Turkey, Mustafa Softa, Joel Qg Spencer, Hasan Sözbi̇li̇r, Sebastien Huot, Tahi̇r Emre
Luminescence Dating Of Quaternary Marine Terraces From The Coastal Part Of Eastern Black Sea And Their Tectonic Implications For The Eastern Pontides, Turkey, Mustafa Softa, Joel Qg Spencer, Hasan Sözbi̇li̇r, Sebastien Huot, Tahi̇r Emre
Turkish Journal of Earth Sciences
The timing of the deposition of the well-preserved Quaternary marine terraces in the coastal region of northeastern Turkey are crucial in understanding the Quaternary tectonics of the Pontides. The chronology of raised marine terraces between Trabzon and Rize has remained unrevealed because of chronologic limitations. This study aims to establish chronology for the terrace deposits by applying optically stimulated luminescence (OSL) dating methods using single aliquot regenerative dose (SAR) techniques on quartz grains extracted from marine terraces. Eleven samples were collected from the lowest three Quaternary marine terraces. The OSL ages clusters into three groups: 52.4 ± 4.6 to 60.0 …
On The Drape And Level Flying Aeromagnetic Survey Modes With Terrain Effects, And Data Reduction Between Arbitrary Surfaces, Yunus Levent Eki̇nci̇
On The Drape And Level Flying Aeromagnetic Survey Modes With Terrain Effects, And Data Reduction Between Arbitrary Surfaces, Yunus Levent Eki̇nci̇
Turkish Journal of Earth Sciences
In addition to the physical parameters such as magnetization intensity distribution, the volume and the shape of the magnetized material, directions of the magnetization and the ambient field, the distance between the observation surface and the causative sources significantly affects the shape and the amplitudes of the magnetic anomalies. Aeromagnetic surveys are performed using either a draped surface or a constant elevation plane above sea level. These surveys can easily reconnoiter large territories in a short time. However, the magnetic anomalies may be attenuated resulting in some losses in the data resolution based on the flight height of the survey. …
Anatomy Of October 30, 2020, Samos (Sisam)-Kuşadası Earthquake (Mw 6.92) And Its Influence On Aegean Earthquake Hazard, Fati̇h Bulut, Asli Doğru, Cenk Yaltirak, Sefa Yalvaç, Murat Elge
Anatomy Of October 30, 2020, Samos (Sisam)-Kuşadası Earthquake (Mw 6.92) And Its Influence On Aegean Earthquake Hazard, Fati̇h Bulut, Asli Doğru, Cenk Yaltirak, Sefa Yalvaç, Murat Elge
Turkish Journal of Earth Sciences
We investigated rupture geometry, size, and slip distribution of October 30, 2020, Samos (Sisam)-Kuşadası earthquake combining seismographs, GPS measurements, and SAR analysis. Right after the earthquake, we measured 13 additional campaign-based GPS sites to intensify the available GPS network consisting of 10 continuous stations. We combined all available seismographs to have the best possible accuracy for mainshock and aftershock hypocenter locations. We compiled all available seismic profiles and integrated them using high-resolution bathymetry to map seismically active faults. The mainshock hypocenter is located at 37.913 ± 0.009 N° and 26.768 ± 0.017 E° and a depth of 12.3 ± 1.7 …
Tectonic Implications Of The Mw 6.8, 30 October 2020 Kuşadası Gulf Earthquake In The Frame Of Active Faults Of Western Turkey, Erhan Altunel, Ali̇ Pinar
Tectonic Implications Of The Mw 6.8, 30 October 2020 Kuşadası Gulf Earthquake In The Frame Of Active Faults Of Western Turkey, Erhan Altunel, Ali̇ Pinar
Turkish Journal of Earth Sciences
A Mw 6.8 earthquake struck Western Turkey and Eastern Greece that occurred on October 30, 2020 in Kuşadası Gulf. The earthquake epicentre is located north of Samos Island and the focal mechanism solution shows that a normal fault was reactivated. The main shock and aftershock analysis imply that the large earthquake occurred on a north dipping normal fault which might be the western continuation of the Efes Fault in Western Turkey. We propose that the western continuation of the Efes Fault steps over right somewhere in northeast of Samos Island and continues further west along the northwest margin of the …
Investigation Of Strain Accumulation Along Tuzla Fault - Western Turkey, Emre Havazli, Haluk Özener
Investigation Of Strain Accumulation Along Tuzla Fault - Western Turkey, Emre Havazli, Haluk Özener
Turkish Journal of Earth Sciences
The Aegean region is one of the most seismically active regions in Turkey and comprises the Hellenic Arc, Greece, and Western Turkey. The Tuzla Fault, which lies between the town of Menderes and Cape Doğanbey, is one of the major seismic threats in western Turkey due to its seismic potential to generate a major earthquake (M 6, near Doğanbey Cape in 1992) and proximity to the city of İzmir which sustained damage due to the earthquake that occurred in the Aegean Sea on October 30th, 2020. In order to estimate strain rates and seismic potential around the Tuzla Fault, five …
A Numerical Approach To Verify The Reservoir Temperature Of The Afyon Geothermal Fields, Turkey, Özgür Karaoğlu
A Numerical Approach To Verify The Reservoir Temperature Of The Afyon Geothermal Fields, Turkey, Özgür Karaoğlu
Turkish Journal of Earth Sciences
Geothermal energy constitutes an important renewable resource in Turkey that has been extensively utilized for heating buildings, power generation, greenhouse farming and various other industries. One of the most remarkable geothermal locations in Turkey is the low-enthalpy area of Afyon, where five main low-temperature (30-110 °C) geothermal fields are exploited. However, further exploration drilling sites have proven inconclusive, casting doubts on the effective presence of high-temperature geothermal systems in the region. Part of the challenge is that the geometry, size and depth of the heat source of the geothermal system is poorly constrained. It is documented that the Afyon region …
Basin Margin Tectonics And Morphology As Controls Of Delta Type And Architecture: Examples From The Mio-Pliocene Yalvaç Basin (Sw Turkey), Ayhan Ilgar, Ali̇ Ergen, Ercan Tuncay, Alper Bozkurt
Basin Margin Tectonics And Morphology As Controls Of Delta Type And Architecture: Examples From The Mio-Pliocene Yalvaç Basin (Sw Turkey), Ayhan Ilgar, Ali̇ Ergen, Ercan Tuncay, Alper Bozkurt
Turkish Journal of Earth Sciences
This study describes the sedimentary facies and depositional architectures of Gilbert-type and shoal-water delta deposits developed on opposed margins of the extensional fluvio-lacustrine Yalvaç Basin during the late Cenozoic. The roles of syndepositional tectonism, basin dynamics, and hinterland morphology on the development of different delta types are assessed. This asymmetric trough initially opened as an intramontane molasse basin to the southwest of the Sultandağları massif. Its northern and southern margins are bounded by normal faults, which controlled both tectono-sedimentary evolution of the basin and the surrounding palaeomorphology. The lacustrine deposits consist of thin-bedded limestones, marls, and medium to thick-bedded sandstones …
The Multidisciplinary Approaches On Facies Developments And Depositional Systems Of The Bahçecik Travertines, Gümüşhane, Ne-Turkey, Rai̇f Kandemi̇r, Ezher Tagli̇asacchi̇, Mi̇ne Sezgül Kayseri̇ Özer, Di̇lek Şaffak, Fati̇h Köroğlu, Hsun-Ming Hu, Chuan-Chou Shen
The Multidisciplinary Approaches On Facies Developments And Depositional Systems Of The Bahçecik Travertines, Gümüşhane, Ne-Turkey, Rai̇f Kandemi̇r, Ezher Tagli̇asacchi̇, Mi̇ne Sezgül Kayseri̇ Özer, Di̇lek Şaffak, Fati̇h Köroğlu, Hsun-Ming Hu, Chuan-Chou Shen
Turkish Journal of Earth Sciences
The Bahçecik travertines, located in Gümüşhane (NE-Turkey) have been investigated for the first time using a multidisciplinary approach, which included sedimentological (lithofacies, depositional system), petrographic, radiometric 230Th dating, geochemical analysis (stable isotopes), palynomorphs and geophysics (GPR). A carbonate build-up, 12 m thick, was formed with some interruptions, through the middle Pleistocene period. For this study, two travertine sections (F and D) were extensively used to figure out palaeoenvironmental and palaeoclimatic proxies. The main precipitation cycles, separated by palaeosol levels, have been described and interpreted from a sedimentological perspective. The carbonate deposits consist of shrubs, crystalline crust, reed, laminated (micritic), pisoids, …
High-Resolution Temperature And Precipitation Variability Of Southwest Anatolia Since 1730 Ce From Lake Gölcük Sedimentary Records, Iliya Bauchi Danladi, Sena Akçer Ön, Zeki̇ Bora Ön, Sabine Schmidt
High-Resolution Temperature And Precipitation Variability Of Southwest Anatolia Since 1730 Ce From Lake Gölcük Sedimentary Records, Iliya Bauchi Danladi, Sena Akçer Ön, Zeki̇ Bora Ön, Sabine Schmidt
Turkish Journal of Earth Sciences
We report high-resolution multiproxy analyses [lithology, μXRF and magnetic susceptibility (MS)] of two short gravity sediment cores from the crater Lake Gölcük, southwest Turkey. Our results provide a detailed hydroclimatic record for the last ~290 years. Aided with factor analysis of μXRF data and 210210Pb and 137Cs dating, our multiproxy data show that the Lake Gölcük records documented a series of wet and dry periods between ~ 1730 (±71) and ~ 2018 (±3) CE. Wet periods are evidenced by dark olive green mixed lithology (sandy, clay, and silts) and high values in MS and log(Sr/Ca). On the other hand, dry …
Finite Volume Modeling Of Bathymetry And Fault-Controlled Fluid Circulation In The Sea Of Marmara, Eli̇f Şen, Doğa Doğan
Finite Volume Modeling Of Bathymetry And Fault-Controlled Fluid Circulation In The Sea Of Marmara, Eli̇f Şen, Doğa Doğan
Turkish Journal of Earth Sciences
Fluid vents in the Sea of Marmara were discovered and investigated by several studies. In this paper, a numerical model is created for the first time to determine the possible transport mechanism behind those fluid emissions at the seafloor. The finite volume method is used for numerical simulations by implementing a commercial finite volume code, ANSYS-Fluent. The thermal and physical rock properties used in our models are taken from previous studies. Bathymetry, fault-controlled fluid flow velocities, and temperature distribution patterns for the Central Basin and Western High in the Sea of Marmara are simulated and presented. Effects of faults, thickness …
Simulation Of Seismic Triggering And Failure Time Perturbations Associated With The 30 October 2020 Samos Earthquake (Mw 7.0), Eyüp Sopaci, Ati̇lla Arda Özacar
Simulation Of Seismic Triggering And Failure Time Perturbations Associated With The 30 October 2020 Samos Earthquake (Mw 7.0), Eyüp Sopaci, Ati̇lla Arda Özacar
Turkish Journal of Earth Sciences
The 30 October 2020 Samos earthquake (Mw = 7.0) ruptured a north-dipping offshore normal fault north of the Samos Island with an extensional mechanism. Aftershocks mainly occurred at the western and eastern ends of the rupture plane in agreement with the Coulomb static stress changes. Mechanism of aftershocks located west of the rupture supported activation of the neighboring strike-slip fault almost instantly. In addition, a seismic cluster including events with Mw~4 has emerged two days later at the SE side of Samos Island. This off-plane cluster displays a clear example of delayed seismic triggering at nearby active faults. In this …
Combined Qualitative And Quantitative Regional Interpretation Of The Thermal Results Of Magnetic Data In The Eastern Mediterranean Region, İlki̇n Özsöz
Turkish Journal of Earth Sciences
The study presents thermal structure and active-passive tectonic parts of the Eastern Mediterranean Region. Curie point depth, heat flow map, Moho depth and sediment thickness are used for interpretation. The levelled magnetic data that obtained from the World Digital Magnetic Anomaly Map (WDMAM) is used. The magnetic anomaly is divided into 39 zones for Curie point depth estimation. The Curie point depth values are calculated into Fourier domain. Then heat flow map is generated. The estimated Curie point depth values are ranging from 4.5 km to 25 km. Furthermore, heat flow values are between 55 mW/m2 and 277 mW/m2. Moho …
Long-Term Spatiotemporal Evolution Of Land Subsidence In Konya Metropolitan Area (Turkey) Based On Multisensor Sar Data, Nurdan Şi̇reci̇, Gökhan Aslan, Zi̇yadi̇n Çakir
Long-Term Spatiotemporal Evolution Of Land Subsidence In Konya Metropolitan Area (Turkey) Based On Multisensor Sar Data, Nurdan Şi̇reci̇, Gökhan Aslan, Zi̇yadi̇n Çakir
Turkish Journal of Earth Sciences
We have studied the spatiotemporal evolution of surface deformation in Konya city and its vicinity using advanced multitemporal synthetic aperture radar techniques with SAR data acquired by Envisat, ALOS-1, and Sentinel-1 A/B satellites between 2004 and 2020. Velocity maps and time series show that the city has been subsiding with varying rates in space and time since 2004. The pattern of deformation shows two main lobes of subsidence centered in the western and eastern sides of the city with a nondeforming north-south trending narrow zone in between. Subsidence rate increases from a few cm/yr to 11 cm/yr between 2014 and …
Geology, Mineralogy, And Geochemistry Of The Zarloukh Bentonite -Tuff Deposit,Hemrin South Mountain, Northern Iraq: Implications For Genesis And Geotectonics, Yawooz Kettanah
Turkish Journal of Earth Sciences
The Quaternary Zarloukh Bentonite -Tuff (ZBT) deposit occurs within the Hemrin South Mountain, northern Iraq. The ZBT deposit occurs as depression-filling exposed on the erosional surface of the siliciclastic Pliocene Muqdadiya Formation and covered by an overburden of recent sediments. The thickness of the studied industrial bentonite bed is ~80-100 cm, occurring at the bottom of these depressions, covered by ~3-4 m thick bedded volcanic tuff, which also contains many 10-12 cm thick bentonite layers along its bedding planes. The volcanic ash at the bottom of lakes/swamps with shallow water content acted as basins for the deposition of falling volcanic …
Generation Of Collision-Induced Early To Middle Miocene Adakitic Magmas In Pertek(Tunceli) Area From Eastern Anatolia Postsubductional Setting, Turkey, Sevcan Kürüm, Hakan Çoban, Pinar Aydin
Generation Of Collision-Induced Early To Middle Miocene Adakitic Magmas In Pertek(Tunceli) Area From Eastern Anatolia Postsubductional Setting, Turkey, Sevcan Kürüm, Hakan Çoban, Pinar Aydin
Turkish Journal of Earth Sciences
Early to Middle Miocene andesite-dacite porphyries are well exposed to the Pertek area of Tunceli, Eastern Anatolia, and represent an example of adakite-like magma generation in Eastern Anatolia (postsubductional) collisional setting. Mineral associations in these porphyries are composed of plagioclase (oligoclase-andesine-labradorite), amphibole (pargasite-ferropargasite), biotite, rare quartz, K-feldspar, and minor Fe-Ti oxides. Geochemically they are high-K calc-alkaline in nature and characterized by high SiO2 (>62 wt.%), Al2O3 (mostly >16 wt.%), Na2O/K2O ratio (1.3-1.7), and Sr (generally >400 ppm) contents. Volcanic rocks display depletion in HFSEs, Nb, Ta, and Ti, and slight negative Eu anomaly; have low HREEs, Y (
Impacts Of The 2020 Samos Earthquake On The Modeling Of Ancient Seismic Events, Stathis Stiros
Impacts Of The 2020 Samos Earthquake On The Modeling Of Ancient Seismic Events, Stathis Stiros
Turkish Journal of Earth Sciences
The 2020 Samos, M7.0 earthquake was characterized by an unusual bi-modal-type distribution of damage: limited damage in the nearfield (especially northern Samos coast) and serious localized damage in multi-story buildings in the far field (İzmir area). This pattern is not consistent with the typical distribution of isoseismal lines, and it seems not to represent an isolated effect; the 2014 Samothraki- Gökçeada M6.9 earthquake, for example, may in fact represent a parallel, though at smaller scale. For this reason, the damage pattern of the Samos earthquake may characterize historical earthquakes in the wider region, and perhaps explain, among others, some apparently …
Gps Derived Finite Source Mechanism Of The 30 October 2020 Samos Earthquake, Mw =6.9, In The Aegean Extensional Region, Bahadir Aktuğ, İbrahi̇m Ti̇ryaki̇oğlu, Hasan Sözbi̇li̇r, Haluk Özener, Çağlar Özkaymak, Cemal Özer Yi̇ği̇t, Hali̇l İbrahi̇m Solak, Eda Esma Eyübagi̇l, Bengi̇su Geli̇n, Orhan Tatar, Mustafa Softa
Gps Derived Finite Source Mechanism Of The 30 October 2020 Samos Earthquake, Mw =6.9, In The Aegean Extensional Region, Bahadir Aktuğ, İbrahi̇m Ti̇ryaki̇oğlu, Hasan Sözbi̇li̇r, Haluk Özener, Çağlar Özkaymak, Cemal Özer Yi̇ği̇t, Hali̇l İbrahi̇m Solak, Eda Esma Eyübagi̇l, Bengi̇su Geli̇n, Orhan Tatar, Mustafa Softa
Turkish Journal of Earth Sciences
A submarine area close to the Turkish and Greek border between the cities of Samos-Greece and Seferihisar-Turkey has been shaked on October 30, 2020 by a Mw= 6.9 earthquake. In this study, the finite source mechanism of the Samos earthquake was investigated using geodetic methods and the coseismic behavior of the earthquake was modeled. The observed coseismic displacements at 62 sites were inverted for the fault geometry and the slips. The mainshock did not generate an on-land surface rupture. However, the uniform slip modeling shows a finite source of 43.1 km long and 16 km wide rupture, which slips 1.42 …
Updated Historical Earthquake Catalog Of İzmir Region (Western Anatolia) And Itsimportance For The Determination Of Seismogenic Source, Çi̇ğdem Tepe, Hasan Sözbi̇li̇r, Semi̇h Eski̇, Ökmen Sümer, Çağlar Özkaymak
Updated Historical Earthquake Catalog Of İzmir Region (Western Anatolia) And Itsimportance For The Determination Of Seismogenic Source, Çi̇ğdem Tepe, Hasan Sözbi̇li̇r, Semi̇h Eski̇, Ökmen Sümer, Çağlar Özkaymak
Turkish Journal of Earth Sciences
Although destructive earthquakes have not occurred in the instrumental period except for the 30 October 2020 Samos earthquake (Mw = 6.6), the records show that there were significant earthquakes that caused great destruction in İzmir and its surroundings in the historical period. However, it is not yet clear which faults are causative for these earthquakes affecting İzmir and its surroundings. For this purpose, it has been attempted to determine new geological, seismological and environmental data by examining a large number of original sources, records and old international earthquake catalogs, other than the existing national catalogs used in seismicity studies in …
Tsunami Hazard, Warning, And Risk Reduction In Italy And The Mediterranean Sea: State Of The Art, Gaps, And Future Solutions, Stefano Lorito, Alessandro Amato, Lorenzo Cugliari, Fabrizio Romano, Roberto Tonini, Cecilia Valbonesi, Manuela Volpe
Tsunami Hazard, Warning, And Risk Reduction In Italy And The Mediterranean Sea: State Of The Art, Gaps, And Future Solutions, Stefano Lorito, Alessandro Amato, Lorenzo Cugliari, Fabrizio Romano, Roberto Tonini, Cecilia Valbonesi, Manuela Volpe
Turkish Journal of Earth Sciences
Historical catalogues show evidence for about 300 tsunamis in European coastal waters since 1600 BC, and tsunami hazard models like the NEAMTHM18 provide the probability of future inundation from earthquake-induced tsunamis. A recent wake-up call came from the 2020 Mw7.0 Samos-İzmir earthquake and the following moderate, damaging tsunami. Five accredited Tsunami Service Providers (TSPs) run by IPMA (Portugal), CENALT (France), INGV (Italy), NOA (Greece), and KOERI (Turkey), and several national centers monitor the seismicity and provide tsunami alerts in the framework of the UNESCO Tsunami Early Warning and Mitigation System in the North-eastern Atlantic, the Mediterranean and connected seas (NEAMTWS). …
Paleoseismic History Of The Manisa Fault Zone, Western Anatolia, İsmai̇l Duran, Hasan Sözbi̇li̇r, Semi̇h Eski̇, Mustafa Softa, Hüseyi̇n Uytun, Mehmet Yüksel, Mustafa Topaksu
Paleoseismic History Of The Manisa Fault Zone, Western Anatolia, İsmai̇l Duran, Hasan Sözbi̇li̇r, Semi̇h Eski̇, Mustafa Softa, Hüseyi̇n Uytun, Mehmet Yüksel, Mustafa Topaksu
Turkish Journal of Earth Sciences
The 45-km-long, E-W to NW-SE-striking Manisa Fault Zone, which constitutes the western section of the Gediz Graben, is characterized by a pure normal sense of motion with a minor strike-slip component. Even though there are numerous historical earthquakes have been listed in Western Anatolia Graben System, a few studies have been addressed on seismic sources of the earthquakes so far. According to existing literature, the western segment of the Manisa Fault Zone is well known characterized; however, the eastern segment of it has rarely been addressed. To decipher the Holocene seismotectonic behavior of the eastern segment of Manisa Fault Zone, …
Surface Heat Flow In Western Anatolia (Turkey) And Implications To The Thermal Structureof The Gediz Graben, Eli̇f Pazvantoğlu, Kami̇l Erkan, Müjgan Şalk, Bülent Oktay Akkoyunlu, Mete Tayanç
Surface Heat Flow In Western Anatolia (Turkey) And Implications To The Thermal Structureof The Gediz Graben, Eli̇f Pazvantoğlu, Kami̇l Erkan, Müjgan Şalk, Bülent Oktay Akkoyunlu, Mete Tayanç
Turkish Journal of Earth Sciences
Knowledge of heat flow density on the Earth's surface and subsurface temperature distribution is essential for the interpretation of several processes in the crust such as for the evaluation of the geothermal potential of a region. With this study, we investigate the conductive heat flow distribution in western Anatolia to understand the thermal state and its relationship to regional tectonics in the region. The new heat flow data are collected and combined with previously published data to obtain the new heat flow map of western Anatolia. Analysis of data sets after appropriate corrections yields a better picture of the regional …
Bioerosional Structures From The Late Pleistocene Coral Reef, Red Sea Coast, Northwest Saudi Arabia, Huri̇ye Demi̇rcan, Abdelbaset El Sorogy, Talal Alharbi
Bioerosional Structures From The Late Pleistocene Coral Reef, Red Sea Coast, Northwest Saudi Arabia, Huri̇ye Demi̇rcan, Abdelbaset El Sorogy, Talal Alharbi
Turkish Journal of Earth Sciences
Herein, 20 ichnospecies belonging to 8 ichnogenera were identified in bivalves, gastropods, and corals (n = 701) from the Late Pleistocene coral reef along the Red Sea coast, northwest Saudi Arabia. The trace fossils were produced by clionid sponges (47.39%), endolithic bivalves (42.17%), polychaete annelids (5.42%), vermetid gastropods (3.81%), and acrothoracican barnacles (1.21%). The recognized ichnotaxa were Entobia geometrica, E. ovula, E. cf. goniodes, E. cf. retiformis, E. cretacea, Entobia isp., Gastrochaenolites torpedo, G. lapidicus, G. cf. dijugus, Gastrochaenolites isp., Oichnus paraboloides, O. simplex, Oichnus isp., Caulostrepsis taeniola, Caulostrepsis isp., Maeandropolydora cf. sulcans, Maeandropolydora isp., Renichnus isp., Centrichnus isp., and …
Interpretation Of Aeromagnetic Data Of The Sivas Basin In The Central Eastern Turkey, Funda Bi̇li̇m, Atti̇la Aydemi̇r
Interpretation Of Aeromagnetic Data Of The Sivas Basin In The Central Eastern Turkey, Funda Bi̇li̇m, Atti̇la Aydemi̇r
Turkish Journal of Earth Sciences
The Sivas Basin is located in the eastern part of the central Anatolia. In this study, aeromagnetic data in the basin and surrounding area are processed and anomalies are interpreted to determine the approximate locations of the causative bodies and reveal their relationship with the tectonic trends. The sedimentary basin is surrounded by strong magnetic anomalies from the south, east, and northeast. The most apparent anomalies are observed in the E-NE of Zara, SW of Divriği, and north of Kangal. These anomalies do not present significant directional change when they are reduced to the pole process. Causative bodies of the …
Formation Of Ti-Rich Bauxite From Alkali Basalt In Continental Margin Carbonates, Payas Region, Se Turkey: Implications For Sea Level Change In The Upper Cretaceous, Hüseyi̇n Öztürk, Nurullah Hani̇lçi̇, Zeynep Cansu, Cem Kasapçi
Formation Of Ti-Rich Bauxite From Alkali Basalt In Continental Margin Carbonates, Payas Region, Se Turkey: Implications For Sea Level Change In The Upper Cretaceous, Hüseyi̇n Öztürk, Nurullah Hani̇lçi̇, Zeynep Cansu, Cem Kasapçi
Turkish Journal of Earth Sciences
The Payas region bauxite deposits occur as a sandwiched layer that is a few kilometers long and an average of 10 m thick between the lower and upper Cretaceous carbonates of the Arabian Platform. The bauxites occur as 2 types, comprising blanket and pocket, are chemically and texturally homogeneous, and have a thrust structure with ophiolitic mélange formations. The bauxite varies in color, from reddish-brown to grayish-green to black, and has a massive, patchy, and very rare oolitic-pisolitic texture. The bauxite mainly consists of diaspore, hematite, rutile, anatase, rare kaolinite, boehmite, and pyrite minerals.The prismatic and lath-shaped euhedral rutile within …