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Articles 1 - 30 of 822
Full-Text Articles in Physical Sciences and Mathematics
Genesis Of Efficient Reservoirs In Mixed Sedimentary Setting: A Case Study Of Benxi Formation In The Gaoqiao Area, Ordos Basin, Shu Liu, Jinbu Li, Fengbo Jin, Haifeng Liu, Meng Wang, Yulin Cheng, Yulin Cheng, Xiaohong Zhong, Hao Lu
Genesis Of Efficient Reservoirs In Mixed Sedimentary Setting: A Case Study Of Benxi Formation In The Gaoqiao Area, Ordos Basin, Shu Liu, Jinbu Li, Fengbo Jin, Haifeng Liu, Meng Wang, Yulin Cheng, Yulin Cheng, Xiaohong Zhong, Hao Lu
Turkish Journal of Earth Sciences
The Benxi-Taiyuan Formation in the southern region of the Ordos Basin represents a typical mixed sedimentary system, which has witnessed recent breakthroughs in the exploration of tight sandstone gas within the Benxi Formation. However, the development patterns of reservoirs in this mixed sedimentary area remain unclear, influenced by the sedimentary model and the distribution scale of sedimentary sandstone bodies. This study investigates the paleogeomorphology, sedimentary model, sandstone body type, petrological characteristics, and pore structure of the Benxi Formation. Field profiles, drilling core observations, microscopic section analysis, scanning electron microscopy (SEM), high-pressure mercury injection (HPMI), and physical property analysis are employed. …
Dinsar Analysis And Geophysical Modeling Of 2022 November 23 Gölyaka-Düzce Earthquake, Şükrü Onur Karaca, Gülteki̇n Erten, Batuğhan Yikmaz, Seli̇m Özalp
Dinsar Analysis And Geophysical Modeling Of 2022 November 23 Gölyaka-Düzce Earthquake, Şükrü Onur Karaca, Gülteki̇n Erten, Batuğhan Yikmaz, Seli̇m Özalp
Turkish Journal of Earth Sciences
Numerous significant earthquakes have occurred along the North Anatolian Fault Zone (NAFZ), Türkiye’s most important fault zone. An earthquake with magnitude of Mw 6.0 occurred near the Gölyaka District of Düzce Province at 04:08 local time on November 23, 2022. According to the moment tensor solutions published by national and international seismology centers, the earthquake occurred at the northeast end of the Karadere segment within the NAFZ and was caused by a right-lateral strike-slip fault in the NW-SE direction. In this study, the differential interferometric synthetic aperture radar (InSAR) method was employed to analyze the deformation. Four Sentinel-1A complex datasets …
Evaluating The Neotectonic Activities Of The Eastern Makran At The Northern Edge Of The Triple Junction In Southwest Pakistan, Waseem Khan, Ke Zhang, Hao Liang
Evaluating The Neotectonic Activities Of The Eastern Makran At The Northern Edge Of The Triple Junction In Southwest Pakistan, Waseem Khan, Ke Zhang, Hao Liang
Turkish Journal of Earth Sciences
A number of five GIS-based indices, such as stream slope (Ss), surface roughness (Sr), asymmetric factor (Af), hypsometry integral (Hi), and stream-length gradient (SL), were summarised to examine the intensity of the index of tectonic activity (IAT) in 43 subbasins of Hingol Basin at the northern edge of the triple junction in southwest Pakistan. In addition, tectonic influences were identified by knickpoints spatial distribution and field surveys. The majority of the indices are consistent and display roughly the same classifications. The uncertain results have a less substantial impact on the obtained results in most of the 43 subbasins. Using these …
Mineralogical And Geochemical Characteristics Of The Upper Cretaceous And Lower Paleocene Parts Of The Germav Formation: Southeastern Türkiye, Sema Teti̇ker
Turkish Journal of Earth Sciences
The mineralogical and chemical characteristics of Upper Cretaceous-Lower Paleocene claystone sediment samples taken from Mardin and Batman, located in southeastern Türkiye, were analyzed in the present study. The clay mineral paragenesis in the Upper Cretaceous units consisted of chlorite-smectite (C-S) and illite, whereas the Lower Paleocene unit consisted of chlorite-vermiculite (CV) and vermiculite minerals. Analyses conducted on clay samples indicated high levels of Al, Mg, Fe, Cr, V, Ni, and Zr. Low levels of alkali and alkaline earth elements (Mg, Na, Ca, K) in the clay-rich sediments suggest relatively high-grade weathering in the source area. The mineralogical compositions, major elemental …
Microfacies, Geometry And Growth Phases Of Microbial Mound In Gucheng Area, Southeastern Tarim Basin, China, Xu Chen, Iftikhar Satti, Yuwen Dong
Microfacies, Geometry And Growth Phases Of Microbial Mound In Gucheng Area, Southeastern Tarim Basin, China, Xu Chen, Iftikhar Satti, Yuwen Dong
Turkish Journal of Earth Sciences
Microbial mound is favorable carbonate reservoir for petroleum exploration, especially for the deep tight reservoirs in the Tarim petroliferous basin. Due to lack of effective research methods, it is difficult to analyze its unique sedimentary structure and evolution process. In this study, based on cores, thin-sections, logging, 3D seismic data and geochemical test data, the petrographic texture, microfacies, geometry and growth phases of microbial mound in Gucheng area, Southeastern Tarim Basin were investigated, which can be used to reconstruct dynamic evolution of the microbial mounds and discuss the controlling factors. The major results are as follows: (1) Gucheng area is …
Landslide Susceptibility Assessment Of The Asi Watershed, Southern Türkiye, Senem Teki̇n, Adolfo Quesada Román, Tolga Çan
Landslide Susceptibility Assessment Of The Asi Watershed, Southern Türkiye, Senem Teki̇n, Adolfo Quesada Román, Tolga Çan
Turkish Journal of Earth Sciences
Landslides constitute recurrent natural hazards worldwide with greater socioeconomic impacts in low-income places. Landslide susceptibility studies are carried out to determine the potential for landslides to occur in a region, to predict possible risks in the future and to integrate this information into sustainable planning and management strategies. Slip-type landslides occur in limited areas of less than 1% of the Asi watershed in Southern Türkiye. Therefore, meaningful estimations cannot be made with classical statistical models. So, using the maximum entropy approach (MaxEnt), a technique for estimating based on a small number of observations, a landslide susceptibility assessment was constructed. The …
An Experimental Investigation On The Discrete Poisson’S Upward Continuation Of Anomalous Gravity Field Data, Mehmet Si̇mav, Bi̇hter Erol, Muhammet Aki̇f Gülender, Serdar Erol
An Experimental Investigation On The Discrete Poisson’S Upward Continuation Of Anomalous Gravity Field Data, Mehmet Si̇mav, Bi̇hter Erol, Muhammet Aki̇f Gülender, Serdar Erol
Turkish Journal of Earth Sciences
The Poisson upward continuation of gravity field functionals, typically given on the Earth’s irregular topography with limited spatial extent, necessitates some proper treatments due to the theoretical requirements. This study reviews the Poisson theory and investigates a more rigorous methodology for the numerical solution of the spherical integral equation by addressing many issues such as spherical-Earth model implementation, far-zone effect, Poisson kernel modification, and suitable ground data reduction scheme. We first explore the far-zone effect and search for an optimal near-zone spherical cap radius above which the truncation error is negligible. We then compare different variants of remove-restore technique with …
Investigation Of Earthquake Sequence And Stress Transfer In The Eastern Anatolia Fault Zone By Coulomb Stress Analysis, Hamdi̇ Alkan, Aydin Büyüksaraç, Özcan Bektaş
Investigation Of Earthquake Sequence And Stress Transfer In The Eastern Anatolia Fault Zone By Coulomb Stress Analysis, Hamdi̇ Alkan, Aydin Büyüksaraç, Özcan Bektaş
Turkish Journal of Earth Sciences
A devastating earthquake with a magnitude of (Mw = 7.7) occurred on February 06, 2023, in the Pazarcık segment of the Eastern Anatolian Fault Zone, which has not shown major earthquake activity for a long time. On the same day, another earthquake with a magnitude of (Mw = 7.6) occurred in Ekinözü-Elbistan (Kahramanmaraş) in the northwest. Three more earthquakes with magnitudes of Mw = 6.6, Mw = 5.9, and ML = 5.7 occurred on the same day, and significant damage, loss of life, and property occurred in 11 provinces and districts. A sixth earthquake occurred with Mw = 6.4 magnitude …
Preliminary Results Of The Great Kahramanmaraş 6 February 2023 Earthquakes (Mw 7.7 And 7.6) And 20 February 2023 Antakya Earthquake (Mw 6.4), Eastern Türkiye, Şule Gürboğa, Önder Kayadi̇bi̇, Hafi̇ze Akilli, Serap Arikan, Sevi̇lay Tan
Preliminary Results Of The Great Kahramanmaraş 6 February 2023 Earthquakes (Mw 7.7 And 7.6) And 20 February 2023 Antakya Earthquake (Mw 6.4), Eastern Türkiye, Şule Gürboğa, Önder Kayadi̇bi̇, Hafi̇ze Akilli, Serap Arikan, Sevi̇lay Tan
Turkish Journal of Earth Sciences
The first MW 7.7 and second MW 7.6 Kahramanmaraş earthquakes were the strongest tectonic events in Eastern Türkiye since the MW 7.9 Erzincan earthquake in 1939. The first and second events occurred on the Pazarcık and Çardak segments of the East Anatolian Fault System, respectively. A subsequent significant earthquake of MW 6.4 occurred in the Antakya fault zone. We summarize preliminary earthquake data and share our previous field observations to better understand the mechanism and provide scientific consequences for future investigations and layout planning. After combining the field observations, kinematic analysis of fault surfaces, investigations of orthophotos, characteristics of mainshocks, …
Surface Rupture During The 6th Of February 2023 Mw 7.6 Elbistan-Ekinözü (Kahramanmaraş) Earthquake: Implications For Fault Rupture Dynamics Along The Northern Branch Of East Anatolian Fault Zone, Mustafa Softa, Fi̇kret Koçbulut, Eli̇f Akgün, Ercan Aksoy, Hasan Sözbi̇li̇r, Orhan Tatar, Volkan Karabacak, Çağlar Özkaymak, Mehmet Utku, Özkan Cevdet Özdağ, Recep Çakir, Ahmet Demi̇r, Gökhan Arslan
Surface Rupture During The 6th Of February 2023 Mw 7.6 Elbistan-Ekinözü (Kahramanmaraş) Earthquake: Implications For Fault Rupture Dynamics Along The Northern Branch Of East Anatolian Fault Zone, Mustafa Softa, Fi̇kret Koçbulut, Eli̇f Akgün, Ercan Aksoy, Hasan Sözbi̇li̇r, Orhan Tatar, Volkan Karabacak, Çağlar Özkaymak, Mehmet Utku, Özkan Cevdet Özdağ, Recep Çakir, Ahmet Demi̇r, Gökhan Arslan
Turkish Journal of Earth Sciences
On the 6th of February 2023, Mw 7.7 Pazarcık (Kahramanmaraş) and Mw 7.6 Ekinözü (Kahramanmaraş) earthquakes that occurred in Türkiye are devastating earthquake series that filled the existing seismic gaps on East Anatolian Fault Zone on the same day. The first Mw 7.7 earthquake caught most people in their sleep and 9 h later, a second one was triggered, ending up with more than 50k death toll, widespread damage to buildings, and massive landslides. This study presents the surface rupture geometry and coseismic displacement characteristics determined with field observations immediately after February 6, 2023, Ekinözü (Kahramanmaraş, Türkiye) earthquake (Mw 7.6). …
Tepehan Rockslide: A Large-Scale Earthquake-Induced Geological Structure Formed By Mw:7.8 Kahramanmaraş (Pazarcık) Earthquake, Türkiye, Ökmen Sümer
Turkish Journal of Earth Sciences
Three devastating and powerful earthquakes hit the southeastern and eastern parts of Turkey and the northestern part of Syria in February of 2023, causing many earthquake-induced slope movements. One of these major mass movements is called the “Tepehan Rockslide”, which was formed by the first Mw: 7.8 earthquake on February 6th, 2023 at Pazarcık (Kahramanmaraş) located in the Altınözü district of Hatay province. The rockslide involved the movement of Middle Miocene basement rocks that consist of clayey limestone, marl, and fine-grained clastic sedimentary rocks. The morphogenetic evaluation of the structure reveals that the Tepehan Rockslide is a very rapidly developed …
Response Of Water Resources To The Kahramanmaraş Earthquakes (Mw 7.7 And Mw 7.6) That Occurred On February 6, 2023, On The East Anatolian Fault Zone (Türkiye), Celaletti̇n Şi̇mşek, Görkem Akinci, Okan Fistikoğlu, Kerem Canli, Hasan Sözbi̇li̇r, Azi̇ze Ayol, Efem Bi̇lgi̇ç
Response Of Water Resources To The Kahramanmaraş Earthquakes (Mw 7.7 And Mw 7.6) That Occurred On February 6, 2023, On The East Anatolian Fault Zone (Türkiye), Celaletti̇n Şi̇mşek, Görkem Akinci, Okan Fistikoğlu, Kerem Canli, Hasan Sözbi̇li̇r, Azi̇ze Ayol, Efem Bi̇lgi̇ç
Turkish Journal of Earth Sciences
On February 6, 2023, two destructive earthquakes of 7.7 MW and 7.6 MW occurred in Pazarcık (Kahramanmaraş) and Elbistan (Kahramanmaraş) at 04:17 and 13:24 hours, respectively. These earthquakes caused a surface rupture with a total length of 450 km in the region with an average displacement of 3 m between the Arabian and Anatolian plates. This study was conducted to investigate the physical deformation of the aquifer system and the current water quality characteristics in the affected region utilizing field observations and on-site analysis of water sources and tap water. The study revealed significant physical changes in the karstic springs …
Soil Liquefaction And Subsidence Disaster In İskenderun Related To The 6 February 2023 Pazarcık (Mw: 7.7) And 20 February Defne (Mw: 6.4) Earthquakes, Türkiye, Hüseyi̇n Öztürk, Craig A. Davis, İbrahi̇m Kuşku, Süleyman Dalğiç, Cem Kasapçi, Muharrem Alper Şengül
Soil Liquefaction And Subsidence Disaster In İskenderun Related To The 6 February 2023 Pazarcık (Mw: 7.7) And 20 February Defne (Mw: 6.4) Earthquakes, Türkiye, Hüseyi̇n Öztürk, Craig A. Davis, İbrahi̇m Kuşku, Süleyman Dalğiç, Cem Kasapçi, Muharrem Alper Şengül
Turkish Journal of Earth Sciences
The Mw 7.7 Pazarcık earthquake on February 06, 2023, struck southern Türkiye, causing typical liquefaction along the shores of İskenderun Bay. This liquefaction was characterized by lateral spreading, subsidence, and flooding. Subsidence-triggered sand ejecta, water flows, and opening cracks were identified in areas spanning approximately 2 km in length and 300 m in width. Based on coastal references such as lighthouses or harbor platforms, settlements of 0.8 m and lateral spreading of 0.4% were recorded along the coastal zone following the Pazarcık earthquake. According to camera recordings, liquefaction-related water and silty sand outflows occurred 29 min after the earthquake. The …
Geochemistry Of The Lake Sediments On Robert Island, South Shetland Islands, Antarctica: Implications For Weathering Processes In Polar Areas, Merve Özyurt, Yilmaz Demi̇r, Korhan Özkan, Rai̇f Kandemi̇r
Geochemistry Of The Lake Sediments On Robert Island, South Shetland Islands, Antarctica: Implications For Weathering Processes In Polar Areas, Merve Özyurt, Yilmaz Demi̇r, Korhan Özkan, Rai̇f Kandemi̇r
Turkish Journal of Earth Sciences
The preliminary results of geochemical analyses of the surface sediments from 4 lakes on Robert Island, South Shetland, Antarctica, are presented herein. The samples were collected during the Turkish Antarctic Expedition (TAE-II) in 2018. Sediment samples were obtained from the littoral zone (approximately 20 cm) of 4 different lakes exposed on the glacier-free land area on Robert Island. The lake sediments predominantly consist of fine-grained sand, clay, and silt particles. These particles include Fe-shale and graywacke geochemical characteristics. Their plagioclase index of alteration, chemical index of weathering, chemical index of alteration, and other weathering index values, suggest that the studied …
Accuracy Investigation Of Gnss-Reflectometry For Sea Level Monitoring On Horseshoe Island, Antarctica: Preliminary Results Of The Turkish Permanent Gnss Station (Tur1), Mahmut Oğuz Selbesoğlu, Hasan Hakan Yavaşoğlu, Mustafa Fahri̇ Karabulut, Özgün Oktar, Vahap Engi̇n Gülal, Hi̇mmet Karaman, Mustafa Ersel Kamaşak
Accuracy Investigation Of Gnss-Reflectometry For Sea Level Monitoring On Horseshoe Island, Antarctica: Preliminary Results Of The Turkish Permanent Gnss Station (Tur1), Mahmut Oğuz Selbesoğlu, Hasan Hakan Yavaşoğlu, Mustafa Fahri̇ Karabulut, Özgün Oktar, Vahap Engi̇n Gülal, Hi̇mmet Karaman, Mustafa Ersel Kamaşak
Turkish Journal of Earth Sciences
Antarctica is called a natural laboratory and is highly important for investigating climate change and its evolution over time. Sustainability is a critical concern due to the challenges posed by glacier melting and rising sea levels due to global warming. According to the Intergovernmental Panel on Climate Change, since the industrial age, the global mean sea level has risen by about 20 cm as a result of the increase in the average world temperature by 1 °C. Therefore, long-term observations by satellite-based techniques in and around Antarctica are of great importance for monitoring the impacts of climate change. In the …
Applicability Of Real-Time Ppp Technique In Polar Regions As An Accurate And Efficient Real-Time Positioning System, Reha Meti̇n Alkan, Serdar Erol, Bi̇lal Mutlu
Applicability Of Real-Time Ppp Technique In Polar Regions As An Accurate And Efficient Real-Time Positioning System, Reha Meti̇n Alkan, Serdar Erol, Bi̇lal Mutlu
Turkish Journal of Earth Sciences
The polar regions, which include the Arctic and Antarctic areas, attract the attention of people every day, and issues that are closely related to the future of humanity make these regions even more important. Accurate and reliable positioning in polar regions is very critical for scientific research projects and also for commercial, touristic, and other human activities. In this study, the usability and the accuracy performance of the real-time precise point positioning (RT-PPP) technique in high-latitude polar regions with harsh environmental and extreme atmospheric conditions were investigated. Within that framework, the GNSS dataset of six IGS multi-GNSS stations located at …
The Geo/Thermochronology Of Dismal Island (Marguerite Bay, Antarctic Peninsula), Fati̇h Karaoğlan, Burcu Karataş, Yavuz Özdemi̇r, Erhan Gülyüz, Oleg Vassilev, Mahmut Oğuz Selbesoğlu, Semi̇h Gi̇ldi̇r
The Geo/Thermochronology Of Dismal Island (Marguerite Bay, Antarctic Peninsula), Fati̇h Karaoğlan, Burcu Karataş, Yavuz Özdemi̇r, Erhan Gülyüz, Oleg Vassilev, Mahmut Oğuz Selbesoğlu, Semi̇h Gi̇ldi̇r
Turkish Journal of Earth Sciences
Dismal Island is located at the entrance of Marguerite Bay between Adelaide Island to the northeast and Alexander Island to the southwest within the Antarctic Peninsula (AP). Its unique position between Alexander and Adelaide islands provides the opportunity to perform testing and link these regions through Cenozoic magmatism and tectonics due to the subduction of the Pacific plate beneath the AP along the northern margin. Dismal Island was visited in February 2021 within the framework of the sixth Turkish Antarctic Expedition (TAE-VI). Thirteen samples were collected for petrography, geochronology, and low-temperature thermochronology (LTT). Of the samples, 3 were dated using …
The Petrogenesis Of Analcime In The Coppermine Formation On Robert Island, South Shetland Islands, Antarctica, Rai̇f Kandemi̇r, Yilmaz Demi̇r, Cüneyt Şen, Ufuk Celal Yağcioğlu
The Petrogenesis Of Analcime In The Coppermine Formation On Robert Island, South Shetland Islands, Antarctica, Rai̇f Kandemi̇r, Yilmaz Demi̇r, Cüneyt Şen, Ufuk Celal Yağcioğlu
Turkish Journal of Earth Sciences
The South Shetland Islands were shaped by island arc volcanism that occurred from the Jurassic to the Quaternary. Robert Island is located in the center of this archipelago, and Coppermine Peninsula, located on the southwestern part of Robert Island, exposures significant rock outcrops of basalts and andesitic-basaltic agglomerates of the Coppermine Formation. The investigated samples were collected during Turkish Antarctic Expedition 2 (TAE-II), in March-April 2018, from the area northeast of Triplet Hill. The volcanic rocks exhibited an amygdaloidal microlithic-porphyritic texture. Subhedral to anhedral phenocrysts of labradorite, augite, and olivine were observed with holocrystalline groundmass composed of plagioclase, pyroxene, and …
Webgis-Based Data Center Design For Polar Science Studies: Simulation Of Türkiye, Müge Şenel, Hasan Hakan Yavaşoğlu, Burcu Özsoy, Hi̇mmet Karaman, Mustafa Ümi̇t Gümüşay
Webgis-Based Data Center Design For Polar Science Studies: Simulation Of Türkiye, Müge Şenel, Hasan Hakan Yavaşoğlu, Burcu Özsoy, Hi̇mmet Karaman, Mustafa Ümi̇t Gümüşay
Turkish Journal of Earth Sciences
Scientific studies concentrated in Antarctica hold great value and importance for humanity. Research projects are conducted in various disciplines on the continent, where nearly 100 research stations from 30 countries are established. Despite the challenges posed by Antarctica's natural structure, unique environment, difficult working conditions, and limited logistics opportunities, scientific research conducted there is indispensable due to the valuable information it offers. In pursuit of accessing this information, Turkish Antarctic expeditions have been organized since 2017. In this study, a polar data center was established through a web-based geographic information system (WebGIS), a significant infrastructure for the continuity of scientific …
Exploring Crowdsourcing Accountability For Mapping Antarctica: A Case Study Using 5 Years Of Social Media Data, Ayşe Gi̇z Gülnerman Gengeç
Exploring Crowdsourcing Accountability For Mapping Antarctica: A Case Study Using 5 Years Of Social Media Data, Ayşe Gi̇z Gülnerman Gengeç
Turkish Journal of Earth Sciences
The continent of Antarctica is one of the most challenging regions in terms of generating and updating geodata. Extensive research has been conducted on geodata acquisition, primarily focusing on earth observation satellites and local surveys in polar regions. Earth observation satellites offer limited spatial, temporal, and semantic data, while local surveys are constrained by polar regions' size and challenging conditions. This article delves into the crowdsourced data, aiming to significantly enhance geodata contribution in polar regions beyond current methods. To our knowledge, this study is the first of its kind to address social media data, a form of crowdsourcing, specifically …
Water Chemistry And Pigment Composition Of 13 Lakes And Ponds In Maritime Antarctica, Korhan Özkan
Water Chemistry And Pigment Composition Of 13 Lakes And Ponds In Maritime Antarctica, Korhan Özkan
Turkish Journal of Earth Sciences
The Antarctic Peninsula has been rapidly warming, resulting in changes to the abundance and surface cover of terrestrial aquatic ecosystems, as well as their ecosystem structure and function. Therefore, comparative studies of aquatic ecosystems across large latitudinal gradients can be useful in better understanding these changes and making more reliable predictions regarding the consequences of climate change. During Turkish Antarctic Expeditions in 2018 and 2019, samples were collected from 10 lakes and 3 ponds across Maritime Antarctica (north-western coasts of the Antarctic Peninsula). These lakes and ponds were located on Ardley, Robert, Livingstone, Galindez, and Horseshoe islands, covering a latitudinal …
Accuracy Assessment Of Glacier Depth Monitoring Based On Uav-Gpr On Horseshoe Island, Antarctica, Mahmut Oğuz Selbesoğlu, Mustafa Fahri̇ Karabulut, Özgün Oktar, Burak Akpinar, Oleg Vassilev, Mehmet Arkali, Şeyma Nur Tufan, Alptuğ Şeref Ayyildiz, Esra Günaydin, Ati̇lla Yilmaz, Doğaç Baybars Işiler, Burcu Özsoy
Accuracy Assessment Of Glacier Depth Monitoring Based On Uav-Gpr On Horseshoe Island, Antarctica, Mahmut Oğuz Selbesoğlu, Mustafa Fahri̇ Karabulut, Özgün Oktar, Burak Akpinar, Oleg Vassilev, Mehmet Arkali, Şeyma Nur Tufan, Alptuğ Şeref Ayyildiz, Esra Günaydin, Ati̇lla Yilmaz, Doğaç Baybars Işiler, Burcu Özsoy
Turkish Journal of Earth Sciences
Unmanned aerial systems have a wide range of uses in studying the impacts of climate change over several fields. Recently, its combination with a ground-penetrating radar (GPR) technology has been demonstrated to be highly effective for surveying glaciers, especially in difficult and inaccessible terrains like Antarctica. In this context, this study focused on exploring the potential of using an unmanned aerial vehicle (UAV)-GPR to measure the depth of glaciers on Horseshoe Island, West Antarctica. The data were collected during the seventh Turkish Antarctic Expedition (TAE-VII) in February and March 2023, within the scope of the international project titled "Glacier monitoring …
Almacık Complex-An Exhumed Lower To Middle Crust In Northwest Anatolia, Aral Okay, Andrew R.C. Kylander-Clark, Sarah Sherlock
Almacık Complex-An Exhumed Lower To Middle Crust In Northwest Anatolia, Aral Okay, Andrew R.C. Kylander-Clark, Sarah Sherlock
Turkish Journal of Earth Sciences
The Almacık Complex is a tectonic unit of high-grade metamorphic rocks in the Intra-Pontide Suture Zone in northwest Turkey. It consists mainly of amphibolite, metaultramafic rock, and gneiss, which are intruded by numerous pre-, syn-, and posttectonic felsic veins. The Almacık Complex is variously interpreted as a Cretaceous or Neoproterozoic ophiolite, or a Permian mafic-ultramafic complex representing the middle to lower crust of the Sakarya Zone. Herein, new petrological and geochronological data were presented from the Almacık Complex. Two-pyroxene geothermometry in the metawebsterites indicated that the Almacık Complex has undergone upper amphibolite-facies metamorphism at 750 ± 30 °C and 8 …
More Evidence Of Tropical Conditions In The Middle Eocene Climatic Optimum (Meco) With New Fossil Woods From North-Central Türkiye, Ünal Akkemi̇k, Fi̇kret Koçbulut, Özlem Toprak, Umut Tunç
More Evidence Of Tropical Conditions In The Middle Eocene Climatic Optimum (Meco) With New Fossil Woods From North-Central Türkiye, Ünal Akkemi̇k, Fi̇kret Koçbulut, Özlem Toprak, Umut Tunç
Turkish Journal of Earth Sciences
Fossil wood descriptions are among the most important indicators in understanding forest structures across geological ages. This study was carried out to obtain new findings about the Middle Eocene Climate Optimum (MECO) period of Anatolia with new samples collected from the Middle Eocene-aged fossil area near Amasya-Göynücek. The fossil area falls into the Göynücek Volcanics in the region. Transverse, radial, and tangential microscopic sections were taken from three new fossil wood samples, and all identifications were performed on these microscopic sections. As a result, the fossil species were identified as Pinuxylon cf. P. tarnocziense, cf. Dichrostachyoxylon zirkelii, and Laurinoxylon perseamimatus …
Middle Eocene Alveolina-Dominated Benthic Foraminiferal Assemblages Of The Western Flank Of The Isparta Angle (Sw Türkiye): Taxonomy, Biostratigraphy, Microfacies Analysis, And Paleoenvironmental Implications, Alper Bozkurt, Muhi̇tti̇n Görmüş, Banu Türkmen Bozkurt
Middle Eocene Alveolina-Dominated Benthic Foraminiferal Assemblages Of The Western Flank Of The Isparta Angle (Sw Türkiye): Taxonomy, Biostratigraphy, Microfacies Analysis, And Paleoenvironmental Implications, Alper Bozkurt, Muhi̇tti̇n Görmüş, Banu Türkmen Bozkurt
Turkish Journal of Earth Sciences
Middle Eocene formations of the western part of the Isparta Angle contain abundant larger benthic foraminifera (LBF). Twelve species belonging to the genus Alveolina, including A. callosa, A. fragilis, A. aff. fusiformis, A. gigantea, A. cf. gigantea, A. hottingeri, A. kieli, A. levantina, A. nuttalli, A. cf. obtusa, A. stipes, and A. tenuis have been identified throughout the two measured sections from Dinar and Çardak (SW Türkiye). The investigated assemblages, consisting also of nummulitids, orthophragminids, textulariids, rotaliids, and miliolids, allow us to assign the Suçıkan section to shallow benthic zone 13 (SBZ13) and the Karabayır section to SBZ17. Based on …
Mapping Crustal Structure And Deformation Using Gravity Data In The Bursa Basin And Surroundings, Türkiye, Bülent Oruç, Emi̇r Balkan
Mapping Crustal Structure And Deformation Using Gravity Data In The Bursa Basin And Surroundings, Türkiye, Bülent Oruç, Emi̇r Balkan
Turkish Journal of Earth Sciences
The structure and deformation of the Bursa Basin and surroundings was carried out through the interpretation of Bouguer gravity and isostatic residual gravity anomalies. The spectral analysis was carried out on Bouguer anomalies to obtain the average depths of the crustal structure under the Bursa Basin and surroundings. Parker-Oldenburg algorithm was used to estimate the depths of the interface between upper and lower crust with respect to an average depth and density contrast. We used Mallick-Sharma algorithm to separate the regional gravity anomalies from Bouguer anomalies to estimate the isostatic residual gravity anomalies. Euler deconvolution and two-dimensional density contrast distribution …
Interpreting Structural Configuration Of The Sengkang Basin Of Indonesia Using Edge Detection And 3-D Euler Deconvolution To Satellite Gravity Data, Jamhir Safani, Khalil Ibrahim, Wa Deni, Al Rubaiyn, Firdaus Firdaus, Harisma Harisma
Interpreting Structural Configuration Of The Sengkang Basin Of Indonesia Using Edge Detection And 3-D Euler Deconvolution To Satellite Gravity Data, Jamhir Safani, Khalil Ibrahim, Wa Deni, Al Rubaiyn, Firdaus Firdaus, Harisma Harisma
Turkish Journal of Earth Sciences
The East Walanae Fault Zone and the West Walanae Fault Zone are the two active fault segments in the south arm of Sulawesi. These fault segments are responsible for the formation of the Sengkang Basin. This geological complexity makes the Sengkang Basin a very interesting area to study. This research aims to (1) identify basin boundaries and lithological contacts; (2) estimate the positions of fault segments; and (3) model the basement beneath the Sengkang Basin. The free-air gravity anomaly from the GGMPlus dataset is employed and then corrected using Bouguer and terrain corrections to provide the complete Bouguer gravity anomaly …
A Study On The Magnetite Skarn Mineralization (Gümüşhane, Türkiye): A Magnetic Survey, Ferkan Si̇pahi̇, Münür Burhan Sadiklar, Mehmet Ali̇ Gücer, Ali̇ Aydin, Rasi̇m Taylan Kara
A Study On The Magnetite Skarn Mineralization (Gümüşhane, Türkiye): A Magnetic Survey, Ferkan Si̇pahi̇, Münür Burhan Sadiklar, Mehmet Ali̇ Gücer, Ali̇ Aydin, Rasi̇m Taylan Kara
Turkish Journal of Earth Sciences
Iron (Fe)-skarn mineralizations (Çambaşı, Dereli, Eğrikar, Karadağ, Kopuz, Sekü, Donguldere, Arnastal, Özdil, Ögene, İkizdere, Ovit Dağı, Kartiba, etc.) in the eastern part of the Pontides (NE Türkiye) are accommodated in the Pontide paleomagmatic arc and the eastern part of the Pontides Metallogenic Belt containing numerous various deposits. Fe-skarn mineralization around the Arnastal Plateau (Gümüşhane-Türkiye) is fragmentary in this area, which is covered with plants (grasses, flowers, etc.). Thus, it was attempted to describe the subsurface structures and Fe mineralization using an interpretation of the available geological and existing magnetic data in this area. Granitoid and volcano-sedimentary series (Upper Cretaceous) outcrop …
Density Functional Theory Calculations Of Equilibrium Oxygen Isotope Fractionation Between Borate Minerals And Aqueous Fluids, Hai-Zhen Wei, Martin Palmer, Jun-Lin Wang, Shao-Yong Jiang, Simon V. Hohl, Yuan-Feng Zhu, Chun Huan, Miao-Miao Zhang, Yeşi̇m Yücel Öztürk
Density Functional Theory Calculations Of Equilibrium Oxygen Isotope Fractionation Between Borate Minerals And Aqueous Fluids, Hai-Zhen Wei, Martin Palmer, Jun-Lin Wang, Shao-Yong Jiang, Simon V. Hohl, Yuan-Feng Zhu, Chun Huan, Miao-Miao Zhang, Yeşi̇m Yücel Öztürk
Turkish Journal of Earth Sciences
Borax, ulexite, and colemanite minerals are by far the most important economic source of boron and occur almost exclusively in nonmarine evaporite deposits. While much is known about the geological setting in which they are found, surprisingly little is known about the chemical and physical properties of the brines from which they are formed. Oxygen isotope studies have the potential to reveal important new information regarding borate formation, but unlike most other common oxygen-bearing salts precipitated from brines, there are no experimental data regarding the oxygen isotope fractionation factors between borates and brines. As a first attempt to address this …
A Review Of The Geothermal System Evolution And Distribution In The Central Anatolian Crystalline Complex (Türkiye), Mehmet Furkan Şener, Muhammed Zeynel Öztürk, Alper Baba
A Review Of The Geothermal System Evolution And Distribution In The Central Anatolian Crystalline Complex (Türkiye), Mehmet Furkan Şener, Muhammed Zeynel Öztürk, Alper Baba
Turkish Journal of Earth Sciences
Türkiye is located in the Mediterranean sector of the Alpine-Himalayan tectonic belt and is among the foremost seven countries in the world having an abundance of geothermal resources. The Central Anatolian Crystalline Complex (CACC) is one of the most important geothermal regions in Türkiye. This study aims to evaluate the geothermal system of CACC using the geological, structural, and hydrogeochemical properties that were obtained from previous studies. The present study investigated and evaluated the hydrogeochemical and isotopic properties of 762 water samples belonging to 45 different localities from 41 scientific studies. The result shows that CACC has different heat sources …