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2021

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Articles 26701 - 26730 of 27883

Full-Text Articles in Physical Sciences and Mathematics

Meet The Staff Jan 2021

Meet The Staff

The Synapse: Intercollegiate science magazine

No abstract provided.


Grand Opening, Claire Parker Jan 2021

Grand Opening, Claire Parker

The Synapse: Intercollegiate science magazine

No abstract provided.


The Synapse 29 Jan 2021

The Synapse 29

The Synapse: Intercollegiate science magazine

No abstract provided.


Carbon Futures Trading And Short-Term Price Prediction:An Analysis Using The Fractal Market Hypothesis And Evolutionary Computing, Marc Lamphiere, Jonathan Blackledge, Derek Kearney Jan 2021

Carbon Futures Trading And Short-Term Price Prediction:An Analysis Using The Fractal Market Hypothesis And Evolutionary Computing, Marc Lamphiere, Jonathan Blackledge, Derek Kearney

Articles

This paper presents trend prediction results based on backtesting of the European UnionEmissions Trading Scheme futures market. This is based on the Intercontinental Exchange from 2005to 2019. An alternative trend prediction strategy is taken that is predicated on an application of theFractal Market Hypothesis (FMH) in order to develop an indicator that is predictive of short termfuture behaviour. To achieve this, we consider that a change in the polarity of the Lyapunov-to-Volatility Ratio precedes an associated change in the trend of the European Union Allowances (EUAs)price signal. The application of the FMH in this case is demonstrated to provide a …


Evaluation Of Anisotropic Magnetoresistive (Amr) Sensors For A Magnetic Field Scanning System For Srf Cavities, Ishwari P. Parajuli, Gianluigi Ciovati, Jean R. Delayen, Alex V. Gurevich Jan 2021

Evaluation Of Anisotropic Magnetoresistive (Amr) Sensors For A Magnetic Field Scanning System For Srf Cavities, Ishwari P. Parajuli, Gianluigi Ciovati, Jean R. Delayen, Alex V. Gurevich

Physics Faculty Publications

One of the significant causes of residual losses in superconducting radio-frequency (SRF) cavities is trapped magnetic flux. The flux trapping mechanism depends on many factors that include cool-down conditions, surface preparation techniques, and ambient magnetic field orientation. Suitable diagnostic tools are not yet available to quantitatively correlate such factors’ effect on the flux trapping mechanism. A magnetic field scanning system (MFSS) consisting of AMR sensors, fluxgate magnetometers, or Hall probes is recently commissioned to scan the local magnetic field of trapped vortices around 1.3 GHz single-cell SRF cavities. In this contribution, we will present results from sensitivity calibration and the …


Design Of An Rf-Dipole Crabbing Cavity System For The Electron-Ion Collider, Subashini U. De Silva, Jean R. Delayen, H. Park, F. Marhauser, J. Henry, R. A. Rimmer Jan 2021

Design Of An Rf-Dipole Crabbing Cavity System For The Electron-Ion Collider, Subashini U. De Silva, Jean R. Delayen, H. Park, F. Marhauser, J. Henry, R. A. Rimmer

Physics Faculty Publications

The Electron-Ion Collider requires several crabbing systems to facilitate head-on collisions between electron and proton beams in increasing the luminosity at the interaction point. One of the critical rf systems is the 197 MHz crabbing system that will be used in crabbing the proton beam. Many factors such as the low operating frequency, large transverse voltage requirement, tight longitudinal and transverse impedance thresholds, and limited beam line space makes the crabbing cavity design challenging. The rf-dipole cavity design is considered as one of the crabbing cavity options for the 197 MHz crabbing system. The cavity is designed including the HOM …


Nb3Sn Coating Of Twin Axis Cavity For Srf Applications, J. K. Tiskumara, Jean R. Delayen, G. V. Eremeev, U. Pudasaini, C. E. Reece Jan 2021

Nb3Sn Coating Of Twin Axis Cavity For Srf Applications, J. K. Tiskumara, Jean R. Delayen, G. V. Eremeev, U. Pudasaini, C. E. Reece

Physics Faculty Publications

The twin axis cavity with two identical accelerating beams has been proposed for energy recovery linac (ERL) applications. Nb3Sn is a superconducting material with a higher critical temperature and a higher critical field as compared to Nb, which promises a lower operating cost due to higher quality factors. Two niobium twin axis cavities were fabricated at JLab and were proposed to be coated with Nb3Sn. Due to their more complex geometry, the typical coating process used for basic elliptical cavi-ties needs to be improved to coat these cavities. This development advances the current coating system at …


Food Contact Surfaces: Challenges, Legislation And Solutions, Shubham Sharma, Amit Jaiswal, Brendan Duffy, Swarna Jaiswal Jan 2021

Food Contact Surfaces: Challenges, Legislation And Solutions, Shubham Sharma, Amit Jaiswal, Brendan Duffy, Swarna Jaiswal

Articles

Food contact surfaces (FCSs) include all surfaces that may come in contact with the food during production, processing, and packaging. Food processing industries encounter several challenges due to its microbial interaction with the FCSs, such as cross-contamination of pathogenic microorganisms or allergens in food, formation of biofilm, biodeterioration of food contact surface leads to food with reduced shelf-life and quality. A legal EU framework provides the fundamental postulates for the safety and inertness of all Food Contact Materials (FCMs). Legislations have an important role in providing regulatory guidance on the quality assurance systems and verifying their implementation as a means …


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 Jan 2021

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 …


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 Jan 2021

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 …


Late Pleistocene-Holocene Characteristics Of The North Anatolian Fault At Adapazarı Basin: Evidence From The Age And Geometry Of The Fluvial Terrace Staircases, Mehmet Korhan Erturaç Jan 2021

Late Pleistocene-Holocene Characteristics Of The North Anatolian Fault At Adapazarı Basin: Evidence From The Age And Geometry Of The Fluvial Terrace Staircases, Mehmet Korhan Erturaç

Turkish Journal of Earth Sciences

The Late Pleistocene-Holocene evolution of the Adapazarı Basin was investigated using the stratigraphy, geometry, and absoluteluminescence dating of the 4-step fluvial terrace staircases of the Sakarya River. The results revealed that the fluvial cycle was primarily related to relative sea level changes of the Black Sea. The initiation of deposition and the abandonment ages of the terraces indicated relative high stands during marine isotope stage (MIS) 5a (~84-72 ka), 3 (40-30 ka), and 1 (9 ka-recent). The erosional periods in between the terrace steps reflected the response of the Sakarya River to the significantly low stands of the sea. The …


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 Jan 2021

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 …


Multiple Fluid-Mineral Equilibria Approach To Constrain The Evolution Of Thermal Watersin The Hisaralan Geothermal Field, Simav Graben, Western Turkey, Ali̇ Gökgöz, Hali̇m Mutlu, Mehmet Özkul, Ali̇ Kami̇l Yüksel Jan 2021

Multiple Fluid-Mineral Equilibria Approach To Constrain The Evolution Of Thermal Watersin The Hisaralan Geothermal Field, Simav Graben, Western Turkey, Ali̇ Gökgöz, Hali̇m Mutlu, Mehmet Özkul, Ali̇ Kami̇l Yüksel

Turkish Journal of Earth Sciences

In this study seasonal changes in the geochemical and stable isotope compositions of Hisaralan thermal waters in Simav Graben, western Turkey, were investigated with regards to a variety of mineral-water interactions and mixing processes. The Hisaralan and Emendere geothermal waters, with temperatures of up to 99 °C, were mostly of Na-HCO3 and Ca-HCO3 types. The δ18O and δ2H values of the Hisaralan waters ranged from -9.32‰ to -8.73‰ and -65.02‰ to -61.10‰, with maximum seasonal differences of 0.3‰ and 1.8‰. The Emendere waters were represented by a more positive range of δ2H values (-54.95‰ to -54.61‰), while their δ18O compositions …


Stacked Debris Flows Offshore Sakarya Canyon, Western Black Sea: Morphology, Seismiccharacterization And Formation Processes, Derman Dondurur, Aslihan Nasif Jan 2021

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 …


Peritectic Assemblage Entrainment And Mafic-Felsic Magma Interaction In Thelate Oligocene-Early Miocene Karadağ Pluton In The Biga Peninsula, Northwest Turkey:Petrogenesis And Geodynamic Implications, Namik Aysal, Abdullah Si̇nan Öngen, Sabah Yilmaz Şahi̇n, Cem Kasapçi, Nurullah Hani̇lçi̇, Irena Peytcheva Jan 2021

Peritectic Assemblage Entrainment And Mafic-Felsic Magma Interaction In Thelate Oligocene-Early Miocene Karadağ Pluton In The Biga Peninsula, Northwest Turkey:Petrogenesis And Geodynamic Implications, Namik Aysal, Abdullah Si̇nan Öngen, Sabah Yilmaz Şahi̇n, Cem Kasapçi, Nurullah Hani̇lçi̇, Irena Peytcheva

Turkish Journal of Earth Sciences

The Hellenic subduction system governs the entire Aegean region through the creation of a migrating magmatic arc that has existed since the beginning of the Early Cenozoic. The Karadağ Pluton is situated in the NW part of Turkey and represents one of the distinct snapshots of this subduction system during the Late Oligocene-Early Miocene Period.iod. It consists of 2 major lithological units, based on their petrographic and geochemical features, comprising: 1) main plutonic facies (SiO2 < 70 wt.%) that are dominated by hornblende- and biotite-bearing monzogranite, quartz monzonite, and granodiorite, and 2) late-stage more felsic facies (SiO2 > 70 wt.%) that are represented by cordierite-free and cordierite-bearing leucogranites. Zircon U-Pb laser ablation inductively-coupled plasma mass spectrometry and K-Ar dating revealed crystallization and cooling …


First Report Of Myalinid Bivalves In The Lower Carboniferous Of The Hakkari Basin, Se Turkey: Paleoecologic And Paleogeographic Implications, İzzet Hoşgör Jan 2021

First Report Of Myalinid Bivalves In The Lower Carboniferous Of The Hakkari Basin, Se Turkey: Paleoecologic And Paleogeographic Implications, İzzet Hoşgör

Turkish Journal of Earth Sciences

Knowledge of the Late Paleozoic sedimentary history of the northern Gondwana shelf is advanced by new data from the Şort Dere section (Hakkari Basin). Early Carboniferous myalinid bivalves from the Middle East are reported here for the first time. The pre-Permian basement of the Hakkari Basin consists of a Lower Carboniferous sedimentary sequence including the Köprülü and Belek formations. The Köprülü Formation has yielded rich assemblages of vertebrates and invertebrates. Hitherto myalinid bivalves were unknown from this formation; this paper reports the discovery of small and poorly calcified myaliniform shells from two thin beds in the middle part of the …


On The Drape And Level Flying Aeromagnetic Survey Modes With Terrain Effects, And Data Reduction Between Arbitrary Surfaces, Yunus Levent Eki̇nci̇ Jan 2021

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. …


Investigation Of Defective Trees Using Electric Resistivity Method, Turgay İşseven, Yi̇ği̇t Yilmaz, Nedi̇m Gökhan Aydin Jan 2021

Investigation Of Defective Trees Using Electric Resistivity Method, Turgay İşseven, Yi̇ği̇t Yilmaz, Nedi̇m Gökhan Aydin

Turkish Journal of Earth Sciences

The resistivity method in geophysics is used to solve various geological and engineering problems. Recently, this nondestructive method has been used on trees to investigate possible infections within the trunks by scanning resistivity variations. In this study, the electrical resistivity method has been aimed to be applied on various trees in Istanbul, Turkey to test whether the method applies to trees via regular resistivity measurement devices used in geophysics. Firstly, a multi-channel resistivity device, that is designed to automatically take measurements on the ground, is modified to carry out the measurements on trees. The measured data are processed using two …


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 Jan 2021

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 …


Investigation Of Strain Accumulation Along Tuzla Fault - Western Turkey, Emre Havazli, Haluk Özener Jan 2021

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 …


Classification Of Plutonic Rock Types Using Thin Section Images With Deep Transfer Learning, Özlem Polat, Ali̇ Polat, Taner Eki̇ci̇ Jan 2021

Classification Of Plutonic Rock Types Using Thin Section Images With Deep Transfer Learning, Özlem Polat, Ali̇ Polat, Taner Eki̇ci̇

Turkish Journal of Earth Sciences

Classification of rocks is one of the basic parts of geological research and is a difficult task due to the heterogeneous properties of rocks. This process is time consuming and requires sufficiently knowledgeable and experienced specialists in the field of petrography. This paper has a novelty in classifying plutonic rock types for the first time using thin section images; and proposes an approach that uses the deep learning method for automatic classification of 12 types of plutonic rocks. Convolutional neural network based DenseNet121, which is one of the deep learning architectures, is used to extract the features from thin section …


Tectonic Geomorphology Of The Yatağan Fault (Muğla, Sw Turkey): Implications For Quantifying Vertical Slip Rates Along Active Normal Faults, Mehran Basmenji, Taylan Sançar, Aynur Di̇kbaş, Sarah Jean Boulton, Hüsnü Serdar Akyüz Jan 2021

Tectonic Geomorphology Of The Yatağan Fault (Muğla, Sw Turkey): Implications For Quantifying Vertical Slip Rates Along Active Normal Faults, Mehran Basmenji, Taylan Sançar, Aynur Di̇kbaş, Sarah Jean Boulton, Hüsnü Serdar Akyüz

Turkish Journal of Earth Sciences

South Western Anatolia is dominated by E-W and NW-SE trending active faults. The dip-slip Yatağan Fault is one of these active structures that trends in a NW direction for ~30 km. To assess the relative tectonic activity of the Yatağan Fault, two geomorphic segments were defined along the fault: the FS-1 (northern segment) and the FS-2 (southern segment). The vertical slip rate pattern of the fault was analyzed using steepness indexes, chi (χ) plots, and log-log slope area graphs. Results of the analyses indicate that the steepness of the streams draining the footwall reveal increasingly higher values downstream along the …


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 Jan 2021

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, …


Reassessment Of The Age And Depositional Environment Of The Kırkgeçit Formation Based On Larger Benthic Foraminifera, Nw Elazığ, Eastern Turkey, Sibel Kayğili Jan 2021

Reassessment Of The Age And Depositional Environment Of The Kırkgeçit Formation Based On Larger Benthic Foraminifera, Nw Elazığ, Eastern Turkey, Sibel Kayğili

Turkish Journal of Earth Sciences

The middle-upper Eocene Kırkgeçit Formation, the fossil content of which is the subject of this study, is deposited in a back-arc basin controlled by block-faulting. The Kırkgeçit basin is interpreted as being formed under an extensional regime related to convergence between the Anatolian plate in the north and the Arabian plate in the south. The aim of this study is to reassess the age and depositional environment of the Kırkgeçit Formation by using detailed biometric analysis data obtained from the reticulate Nummulites and determinations of other larger benthic foraminifera (LBF) in the unit. For this purpose, two sections were measured …


Finite Volume Modeling Of Bathymetry And Fault-Controlled Fluid Circulation In The Sea Of Marmara, Eli̇f Şen, Doğa Doğan Jan 2021

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 Jan 2021

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 Jan 2021

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 …


Structural Characteristics Of Transtensional Fault System And Its Implication Forhydrocarbon Accumulation In S Block, South Asia Area, Yuwen Dong, Iftikhar Satti, Maman Hermana, Xu Chen Jan 2021

Structural Characteristics Of Transtensional Fault System And Its Implication Forhydrocarbon Accumulation In S Block, South Asia Area, Yuwen Dong, Iftikhar Satti, Maman Hermana, Xu Chen

Turkish Journal of Earth Sciences

Transtensional faults are well developed in the S Block of the South Asia area, which have an important impact on the hydrocarbon accumulation. However, the transtensional fault structure is very complex. Based on drilling and seismic data interpretation results, faults are divided into three typical types in the Lower Cretaceous, which can help to understand the complex fault system. The main faults are distributed in the NNW-SSE direction and parallel arrangement with dextral strike-slip shear characteristics, which determines the development of the tectonic belt. The secondary faults are often associated with the main faults, often composed of multiple branch faults. …


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 Jan 2021

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 (


Tectonic Evolution Of The Central Part Of The East Anatolian Fault Zone, Eastern Turkey, Eli̇f Akgün, Murat İnceöz Jan 2021

Tectonic Evolution Of The Central Part Of The East Anatolian Fault Zone, Eastern Turkey, Eli̇f Akgün, Murat İnceöz

Turkish Journal of Earth Sciences

The Eastern Anatolian Fault Zone (EAFZ), having a prominent place in the tectonic evolution of the Eastern Mediterranean, is a structural element of tectonic indentor due to the convergence between the African-Arabian plates and the Eurasian Plate. This study investigates the central part of EAFZ between Doğanyol (Malatya) and Çelikhan (Adıyaman). The geometry of the fault and the morphotectonic structures were determined by the field studies. Moreover, fault-slip data are measured according to the fault planes along the deformation zone for paleostress analysis. The paleostress analysis revealed three deformation phases that developed from the Late Eocene to the present due …