Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Uzun, Sevda(66)
- Merdan, Mehmet(56)
- Duran, Celal(50)
- Ozdes, Duygu(47)
- Kaygusuz, Abdullah(42)
- Demir, Selim(37)
- Turan, Ibrahim(37)
- Ashyralyyev, Charyyar(34)
- Dokuz, Abdurrahman(33)
- Araz, Onur(31)
- Öztürk, Serkan(31)
- Sipahi, Ferkan(30)
- Kandemir, Raif(28)
- Arslan, Mehmet(27)
- Karsli, Orhan(27)
- Kulakaç, Nurşen(26)
- Baltacı, Cemalettin(25)
- Gücer, Mehmet Ali(25)
- Kurt, Kemal(25)
- Maden, Nafiz(25)
- Ozturk, Samet(25)
- Topal, Fevzi(25)
- Baltaci, Cemalettin(24)
- Yücel, Cem(24)
- Aliyazicioglu, Yuksel(23)
- Bayrakdaroglu, Serdar(23)
- Kankal, Murat(23)
- Peker, Iskender(23)
- Yolcu, Halil(23)
- Reis, Hatice Catal(21)
- Topal, Meryem(21)
- Vural, Alaaddin(21)
- Aydin, Aydanur(20)
- Aydin, Faruk(20)
- Bayraktar, Alemdar(20)
- Kurnaz, Muammer(20)
- Çelik, Necati(20)
- Ürkek, Bayram(20)
- Cakir, Tufan(18)
- Günen, Mehmet Akif(18)
Yayınlar
- MakaleYalnız künye2023ON THE SPHERICAL INDICATRIX CURVES OF THE SPACELIKE SALKOWSKI CURVE WITH TIMELIKE PRINCIPAL NORMAL IN LORENTZIAN 3-SPACE
Aksan, Birkan; Mazlum, Sumeyye Gur
In this paper, we calculate Frenet frames, Frenet derivative formulas, curvatures, arc lengths, geodesic curvatures according to the Lorentzian 3-space R31, Lorentzian sphere S21 and hyperbolic sphere H2 0 of the spherical indicatrix curves of the spacelike Salkowski curve with the timelike principal normal in R3 1 and draw the graphs of these indicatrix curves on the spheres.
- MakaleYalnız künye2023The Relationship between Urbanization, Energy Consumption and Carbon Dioxide Emissions: Panel Ardl Analysis for Newly Industrialized Countries
Akyol, Mehmet
An increase in the world population, technological advancement, and economic concerns bring along an increase in urbanization and energy consumption. Increasing urbanization speed and energy consumption cause environmental problems. The main hypothesis of this study is based on the idea that urbanization rate and energy consumption increase carbon dioxide emissions in developing countries. To test this hypethesis, the study ana-lyzed the relationship between urbanization, energy consump-tion, and carbon dioxide emission specific to newly industrialized countries. Panel ARDL method was utilized in this study that scrutinized the years between 1990 and 2018. According to the long-term results of the analysis, urbanization negatively affects carbon dioxide emission in the country group aforementioned; energy consumption and economic growth that is control vari-able have a positive effect on carbon-dioxide emission. Regarding short-term results, only the energy consumption positively af-fects carbon dioxide emission while other variables are statisti-cally insignificant. The results of the analysis reveal the necessity of policies towards smart city applications in reducing carbon dioxide emissions in newly industrialized countries. In addition, turning to renewable sources in energy consumption plays a key role in reducing carbon dioxide emissions.
AtıfOpenAlex2TR Dizin1
İncele - MakaleAçık Erişim2023Materialistic Tendency and Conspicuous Consumption Behavior: The Mediating Role of Social Media Usage
Avci, Ibrahim
This research focuses on the materialistic tendencies and conspicuous consumption behaviors of consumers, especially in today's social media age. The research's goal is to determine the effect of materialistic tendencies on conspicuous consumption behavior and to investigate the role of social media usage in mediating this effect. The data were collected in this context using a prepared survey form, and 596 consumers participated in the survey during the data collection process. SPSS and AMOS programs were used to analyze the collected data. As a result of the analyses, it was discovered that the materialistic tendency had a positive and significant effect on both conspicuous consumption behavior and social media usage; it was also discovered that social media usage had a positive and significant effect on conspicuous consumption behavior. Furthermore, it was determined that social media usage has a partial mediation in the effect of materialistic tendency on conspicuous consumption behavior; in other words, a portion of the effect of materialistic tendency on conspicuous consumption behavior is realized through social media usage. Suggestions for both theory and practice were made in light of these findings.
AtıfWoS2OpenAlex3İncele - MakaleAçık Erişim2023Foreign Aid, Institutions, and Economic Performance in Developing Countries
Hayaloglu, Pinar
Although official development assistance presents a solution for developing countries to overcome the lack of capital, there is no consensus in the literature on the effectiveness of foreign aid. Moreover, opinions claiming that aid can only affect growth positively under certain conditions see institutional quality as an essential aspect that boosts the positive impact of aid. This study examines the relationships between foreign aid, institutional structure, and economic performance for 80 countries in Europe, America, Africa, and Asia. It is found that official development assistance and the quality of institutional structure in the sample countries affect economic growth positively. It also provides some suggestive evidence showing that foreign aid has a positive effect on the institutional structure.
AtıfWoS3OpenAlex4TR Dizin1İncele - MakaleAçık Erişim2023Relationship between Institutional Quality and Corruption: The Case of Turkey
Çiçen, Yildirim Beyazit
The relationship between the level of corruption and the quality of Turkey's institutional structure was investigated in this study. Using quarterly data between 1984-2015, RALS-ADF unit root and RALS-EG cointegration tests were used to determine if there is a relationship between these variables in Turkey. Corruption level is the dependent variable, institutional quality is the independent variable, and the total production index is the control variable. The first analysis included both the coalition and single-party periods. Also, a separate analysis was carried out for the coalition period 1984-2002. There was no correlation between corruption and institutional quality in either analysis.
- MakaleAçık Erişim2023Determining the most suitable sectors in terms of the digital supply chain by integrated fuzzy MCDM approach
Gergin, Ramazan Eyuep
In this day and age, businesses come up against several challenges due to digital progresses in their supply chain. Digitalization has been expected to play an increasingly important role for both companies and the supply chains of the future. Concordantly, it is important to determine the suitability of the supply chains of the sectors for digitalization in order to cope with the difficulties that the enterprises will face in the future. The main objective of this study is to determine the suitability of the supply chains of the sectors in which medium-sized enterprises operate for digitalization. For this purpose, the criteria which affecting the constitution of the digital supply chain are determined with a comprehensive literature search. Fuzzy Analytical Hierarchy Process (FAHP) is utilized to weighting of the relevant criteria. Sectors which medium-sized enterprises are constitute the alternatives of the study. After the weighting of the criteria, in terms of digital supply chain the suitability of the sectors was evaluated via Fuzzy TOPSIS (FTOPSIS) and Fuzzy VIKOR (FVIKOR). BORDA count technique is utilized to obtain the final decision by integrating the results from these two methods. According to the results of the study, the most important criterion in terms of Global Connectivity digital supply chain was determined as the Manufacturing sector according to FTOPSIS and the Health sector has been determined as the most suitable sector for digitalization according to FVIKOR. As to BORDA Count method, results show that the manufacturing sector is the most suitable sector for digitalization in the general ranking.
AtıfWoS1OpenAlex1TR Dizin1İncele - MakaleAçık Erişim2023How Does Being Trusted Affect Sharing? Findings from the Ultimatum Game
Çiçen, Yildirim Beyazit
According to economic models, individuals are rational, possess full knowledge, and strive to maximize their utility beyond their actual characteristics. Nevertheless, in the real world, people shape their behavior within a social structure and can display altruistic attitudes. This study investigates how trust facilitates sharing among individuals. To determine this, the Ultimatum Game was conducted with 412 participants. Three cases were determined, and the bidder was instructed to divide 10 thousand TL first in the typical game. Afterward, it was said that the other person was in need, and the bid was requested to be renewed. At the last stage, bids were received if there was any doubt about the needy. According to the typical game, people are more empathetic towards those in need and offer 6667 TL rather than 4264 TL. However, when a question of reliability is raised, 4658 TL is offered regardless of need. The findings show that the neoclassical economics concept of homo economicus, which seeks to maximize utility, is not valid in real life.
- MakaleAçık Erişim2023The Culture of Living on Screen and the Audience-Human as Screenshot
Demir, Sertac Timur
This paper asserts the idea that everyday life is screened while screens are humanised. As a matter of fact, the screens, which once consisted of detached mechanisms limited to certain places and positioned in front of the audience, at this point, surround the spaces and people. Televisions, mobile phones, tablets, laptops, desktop computers, automobile screens, smart technologies, and flashing billboards are reshaping the connections of modern individuals with the space they live in, the time they feel, the relationships they develop, and their own beings. So much so that the screens that are connected to almost all devices and organize daily life entirely cease to be a platform for viewing images and turn into a kind of spectator's eye. In this regulation, the modern human performs many vital acts from working to having fun, from learning to experiencing, from adapting to resisting not through the screen as it once was, but now as the screen. This screen culture, which basically imitates and perhaps targets the eye, has become one of the norms of digital life. The theoretical framework of this research, which tries to see both the premises of the rapid transformation in question and to trace the ambiguous course, consists of the works of pioneering thinkers such as Gunther Anders, Jean Baudrillard and Byung-Chul Han. For this purpose, in this qualitative study, sociological film analysis is carried out through the episode of Fifteen Million Merits (2011) of the series Black Mirror, one of the Sci-Fi examples that have become very popular in recent years. This episode is notable in terms both of embodying and of nurturing discussions about the screen society.
- MakaleAçık Erişim2023Analysis of Basin Characteristics for Stream Management Using GIS: A Case Study of Gümühane Micro-Watershed
Çakir, Gunay
Aim of study: Topography and climatic conditions have effected in determining the processes of the streams of the micro-watershed. Nowadays, the management plans were made for water and soil protection measures in the basins. Area of study: This study was carried outto characterize and prioritize the streams of the Gumushane upper Harsit micro-watershed using a GIS-based spatial approach. Material and methods: Fundamental watershed characteristics including drainage density, slope, land use types, and stream class were evaluated and interpreted for the Gumushane micro-watershed. Calculatea comprehensive value for each parameter, drainage density (Dd), flow frequency (Fs), slope (S), length of land flow (Lg), and land use (Lu) was used. Main results: The drainage density, stream flow frequency, and form factor of the microwatershed are from-4 to 26. Finally, the weighted rankings were summarized, and all micro-watersheds were categorized to five classes based on the risk index as very low risk, low risk, medium risk, high risk, and very high risk. This risk map overlaid to land use type maps in GIS where risk areas were evaluated in the finalrisk results. The 739 ha productive forest area within very high-risk areas was changed to non-risk parameters. Highlights: The carrying capacity of streams was calculated using the stream density of streams in the Gumushane micro-watershed. The risk values produced by streams that pass through neighborhoods where land use values for preventing erosion are present.
AtıfWoS1OpenAlex2TR Dizin1İncele - MakaleAçık Erişim2023Technological Convergence in Emerging Economies: An Investigation with Unit Root Tests
Zuhal, Mustafa
Technological developments play an important role in economic growth and development and form the basis in the convergence of socioeconomic factors between developed and developing countries, especially income. At the same time, developing countries aim to catch up with the leading countries by improving their technological capabilities, and examining the technological convergence between countries, especially developing countries, is essential at this stage. This study aims to examine whether technological convergence occurs in 10 emerging economies. For this purpose, the study analyzes technological convergence over the variables of number of patents, labor productivity, and total factor productivity using Pesaran's (2007) cross-sectionally augmented Dickey-Fuller (CADF) and seemingly unrelated regression augmented Dickey-Fuller (SURADF) unit root tests. According to the results of the analysis, although there is convergence in some countries, it does not confirm in general technological convergence among the countries.
AtıfWoS2İncele - BildiriYalnız künye2023Deep Learning Based Focus Measurement Operator for 3D Imaging in Microscopic Systems
Dogan, Hulya; Dogan, Ramazan Ozgur
Since 3D imaging in microscopic systems makes cell and tissue structures more prominent and visible, it provides higher performance in image processing applications such as automatic segmentation, recognition, classification, alignment and stitching. For this reason, 3D imaging in microscopic systems has been one of the most comprehensive and long-studied research areas in the literature. It seems that the most frequently preferred strategy for 3D imaging is shape from focus. Shape from focus is a strategy that uses a sequence of 2D images with the same perspective and different focused regions to create the 3D shape of the sample. Focus measurement operators are applied to extract the focus properties of the input images in shape from focus strategies. These operators have several limitations, such as more precise characterization of curves and edges in images. Researchers often use a pre- or post-processing technique to minimize these limitations, rather than proposing a new focus measurement operator. In this study, a deep learning based focus measurement operator, which does not require a pre- or post-processing technique, is developed to eliminate these limitations. The qualitative and quantitative results obtained in the study show that the proposed focus measurement operator is more effective in 3D imaging than other operators in the literature.
- MakaleAçık Erişim2023Neuropsychological and clinical correlations of optical coherence tomography findings in patients with schizophrenia
Kani, Ayse Sakalli; Çam, Cansun Sahin; Çelik, Esra Biberoglu; Dural, Uzay; Dönmez, Melike Duran; Turhan, Semra Akkaya; Toker, Ayse Ebru; Yildiz, Mesut
Objective: There are increasing studies examining retinal fiber layer (RNFL) and ganglion cell layer (GCL) thinning in patients with schizophrenia. However, the results are controversial, and clinical and cognitive reflections of these findings remain unclear. With this study, we aim to examine retinal abnormalities and establish correlations with cognitive and clinical parameters.Methods: In this cross-sectional study, we examined 29 patients with schizophrenia and 13 age and gender-matched healthy controls. All participants underwent psychometric assessment, neuropsychological tests, and optical coherence tomography (OCT) measurements. The retinal fiber layer and ganglion cell layer thickness were used as retinal parameters.Results: Five patients dropped out during the OCT measurement process, 24 patients with schizophrenia and nine healthy controls were included in the analysis. There was no statistically significant difference between groups in measuring retinal nerve fiber layer or ganglion cell layer thicknesses. The verbal fluency test score negatively correlated with left RNFL superior (p = - .422, p <.05). STROOP response duration positively correlated with right RNFL on average (p = .551, p <.05), left RNFL on average (p = .498, p <.05), right RNFL superior (p = .507, p <.05), left RNFL superior (p = .461, p <.05) and right RNFL temporal values (p = .434, p <.05). STROOP response error was also positively correlated with right RNFL temporal thickness (p = .430, p <.05). STROOP response duration was positively correlated with right GCL total (p = .646, p <.01), right GCL superior (p = .658, p <.01) and right GCL inferior (p = .596, p <.01) thickness.Conclusion: We did not find a significant relationship between reduced RNFL or GCL thickness and cognitive impairment. However, we had several positive correlations between cognitive task scores and RNFL and GCL thicknesses. Additionally, our study did not correlate symptom severity and clinical severity parameters with reduced RNFL or GCL thickness.
AtıfWoS1OpenAlex2İncele - MakaleYalnız künye2023Scopus SJRQ3Predicting hospitalization by TAPSE/SPAP and the role of spironolactone in asymptomatic heart failure patients
Aydinyilmaz, Faruk; Guliyev, Ilkin; Özbeyaz, Nail B.; Algül, Engin; Aker, Mert; Sahan, Haluk F.; Erzurum, Muhammed; Felekoglu, Mehmet A.; Kalkan, Kamuran
Aim: To appraise the prediction of tricuspid annular plane systolic excursion (TAPSE)/systolic pulmonary artery pressure (SPAP) with regard to hospitalization and the effect of spironolactone use. Materials & methods: A total of 245 patients were evaluated for the study. Patients were followed for 1 year and cardiovascular outcomes were determined. Results: It was determined that TAPSE/SPAP was an independent predictor of hospitalization. A 0.1-mmHg decrease in TAPSE/SPAP was associated with a 9% increase in relative risk. No event was observed above the 0.47 level. Negative correlation with TAPSE (uncoupling) began in the spironolactone group when SPAP was >= 43 and in nonusers when SPAP was 38 (Pearson's correlation coefficient: -,731 vs -,383; p < 0.001 vs p = 0.037). Conclusion: TAPSE/SPAP measurement may be useful in predicting 1-year hospitalization in asymptomatic heart failure patients. This ratio was also found to be higher in patients who used spironolactone.
AtıfWoS3OpenAlex3
İncele - EditoryalYalnız künye2023Scopus SJRQ3Paraspinal cervical chordoma
Tonkaz, Gokhan; Yitik, Ahmet Yasin; Tonkaz, Mehmet; Tonkaz, Duygu Erkal; Sade, Recep
AtıfWoS1İncele - MakaleAçık Erişim2023Effect of Ptosis Surgery on Tear Oxidative Stress Levels in Patients with Blepharoptosis and Pseudoptosis
Sert, Seda; Arici, Ceyhun; Mergen, Burak; Ekmekci, Ozlem Balci
Objectives: Investigation of the surgical correction effect on tear film functions and tear oxidative stress levels in patients with blepharoptosis and pseudoptosis. Methods: Sixty patients with blepharoptosis or pseudoptosis due to dermatochalasis and 30 healthy controls were included in the study. Forty eyes underwent upper blepharoplasty and 20 eyes underwent levator surgery. The tear oxidative stress levels (8-hydroxydeoxyguanosine [8-OHdG] and 4-hydroxy-2-nonenal [4-HNE]) were determined by enzyme-linked immunosorbent assay and tear film functions were evaluated pre-operatively and at the post-operative 1st and 6th months. Results: 8-OHdG and 4-HNE levels in tears were found higher in patients with dermatochalasis (86.3 +/- 38.2 ng/mL; 29.8 +/- 11.4 ng/mL, respectively) and blepharoptosis (95.3 +/- 43.8 ng/mL; 40.8 +/- 3.8 ng/mL, respectively) compared to healthy controls (52.9 +/- 14.0 ng/mL; 27.8 +/- 6.6 ng/mL, respectively). Both levels decreased 1 month after blepharoplasty surgery. The 8-OHdG level in tears of patients who underwent levator surgery increased 1 month after the surgery (p=0.008). No change was detected in tear function tests findings between visits in any patient group. Conclusion: Dermatochalasis and blepharoptosis may lead to an increase in the tear oxidative stress levels. Contrary to a decrease in these levels after blepharoplasty, they may increase in the early period after levator surgery followed by a return to normal levels at the 6th-month visit.
AtıfWoS1OpenAlex1İncele - Editöre MektupAçık Erişim2023Scopus SJRQ4Unusual vessel wall magnetic resonance imaging findings in a cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy patient
Özdemir, Huseyin Nezih; Karakaya, Hanife; Goekcay, Figen
- MakaleAçık Erişim2023Scopus SJRQ3A needful, unique, and in-place evaluation of the injuries in earthquake victims with computed tomography, in catastrophic disasters! The 2023 Turkey-Syria earthquakes: part II
Tonkaz, Gokhan; Sengul, Demet; Bekci, Tumay; Sengul, Ilker; Cakir, Ismet Mirac; Onder, Ramazan Orkun; Tonkaz, Duygu Erkal; Eryuruk, Uluhan; Aksoy, Iskender; Veiga, Eduardo Carvalho de Arruda
OBJECTIVE: This study aimed to determine the computed tomography findings associated with very recent catastrophic 2023 Turkey-Syria earthquake-related injuries and their anatomotopographic distribution in the adult population.METHODS: The incorporated computed tomography scans of 768 adult cases who had been admitted to the hospital and had undergone computed tomography imaging after these tragic disasters had been examined on the Teleradiology Reporting System of the Turkish Ministry of Health. To this end, the injuries were classified into six categories: head, thoracic, spinal, pelvic, extremity, and abdominal injury, with three age groups (18-34, 35-64, and 365 years) and four different imaging intervals (<24, 24-48, 49-72, and >72 h).RESULTS: This study incorporated 316 (41.1%) cases on the first day, 57 (7.5%) on the second day, 219 (28.5%) on the third day, and 176 (22.9%) on the fourth day after the earthquake or later. Of the 768 cases, 109 (14.2%) had a head injury, 100 (13.0%) had a thoracic injury, 99 (12.9%) had a spinal injury, 51 (6.6%) had a pelvic injury, 41 (5.4%) had an extremity injury, and 11 (1.4%) had an abdominal injury.CONCLUSION: In these regrettable earthquake disasters, we determined a high ratio of head injuries, which was closely followed by thoracic and spinal injuries, in our preliminary outcomes for the pediatric population, Part I. The frequency of abdominal injuries was low among individuals who experienced the earthquake. Last but not least, we have noticed a higher likelihood of spinal injury in individuals older than 65 years in the studied population.
AtıfWoS5OpenAlex4İncele - MakaleAçık Erişim2023Scopus SJRQ1Oilseed warehouse location selection with an integrated approach: a case of Turkey
Gergin, Ramazan Eyup; Peker, Iskender; Baki, Birdogan; Tuzkaya, Umut Rifat; Tanyas, Mehmet
Purpose Agricultural sector not only meets the nutritional requirements of all living creatures but also generates the primary source of the raw material provided by various branches of industry to fulfill their functions. It is of great importance to increase studies on oilseeds which have an important role in Turkey's agricultural products. They are grown in almost all of the country, which are vital for the nutrition and many sectors. The main purpose of the study is to offer an integrated approach to determine potential warehouse locations for oilseeds. Design/methodology/approach This is the first study that integrates Delphi, analytical hierarchical process (AHP), technique for order preference by similarity to ideal solution (TOPSIS), P-Median and Panel data analysis in a real case. This integrated approach consists of the following steps, respectively: (1) The criteria were determined by the Delphi method. (2) The weights of the criteria were calculated by AHP and the provinces with the highest oilseed warehouse potential in seven regions of Turkey were specified by TOPSIS. (3) Oilseed warehouse numbers and locations were obtained by P-Median. (4) In order to answer whether the distribution network is profitable in the future with the determined center locations, a forecast model based on panel data analysis was created. (5) Regional representatives were determined for 2030, and the distribution network was analyzed again. (6) The costs that arose in 2018 and 2030 were computed and compared by cost analysis. (7) The effect of the change in criteria weights on the alternative results was tested by scenario analysis. Findings The findings indicated that oilseed crop production potential and oilseed crop production area turned out to be the most important criteria. Furthermore, the results showed that this model is robust and suitable for warehouse location selection studies. Practical implications The study can serve as a guide for local and central policy makers with both the criteria it uses and the model it develops. Originality/value The main contribution of this study is that the integrated approach has been used for the first time in location selection in a real case.
AtıfWoS6OpenAlex12İncele - MakaleAçık Erişim2023Scopus SJRQ3A needful, unique, and in-place evaluation of the injuries in earthquake victims with computed tomography, in catastrophic disasters! The 2023 Turkey-Syria earthquakes: part I
Cakir, Ismet Mirac; Sengul, Ilker; Bekci, Tumay; Tonkaz, Gokhan; Eryuruk, Uluhan; Onder, Ramazan Orkun; Aksoy, Iskender; Bayar, Ayse Elif; Tonkaz, Mehmet; Sengul, Demet
OBJECTIVE: This study was carried out to evaluate the injuries in pediatric earthquake victims due to the 2023 Turkey-Syria earthquakes with computed tomography and determine the anatomotopographic distribution of injuries. METHODS: The material of this retrospective study consisted of the computed tomography findings of 257 pediatric cases injured in the 2023 Turkey-Syria earthquakes, and those were divided into subgroups based on their age group, i.e., 0-4, 5-9, 10-14, and 15-18 years, and the type of injury, i.e., head, maxillofacial, thoracic, abdominal, pelvic, and spinal injuries. RESULTS: Earthquake-related injuries had been detected in 102 (39.6%) patients. Of the 29 patients with multiple injuries, 17, 10, and 2 had injuries in two, three, and four topographic regions, respectively. The most common injury was a head injury, which was detected in 48 (18.7%) cases, followed by thoracic injury, spinal injury, pelvic fracture, abdominal injury, and maxillofacial fracture, which were detected in 40 (15.6%), 22 (8.5%), 19 (7.4%), 10 (3.9%), and 6 (2.3%) patients, respectively. The cranial bone fractures and intracranial injuries were significantly more frequent in the 0-4 years age group compared with other age groups (p=0.028 and p=0.024, respectively). The rib fractures with spinal and pleural injuries were significantly more common in the 15-18 years age group compared with others (p=0.016, p=0.004, and p=0.002, respectively). CONCLUSION: The head injury was the most common earthquake-related injury in pediatric cases. Herein, it was more common in younger children compared with other age groups, whereas rib, spine, and pleural injuries were more common in older children.
AtıfWoS7OpenAlex8İncele - MakaleYalnız künye2023Scopus SJRQ1Post-Variscan autochthonous cover in the eastern Sakarya Zone, Turkey: Evolution of the late Carboniferous back-arc ocean to the Triassic Karakaya Ocean
Dokuz, Abdurrahman; Alçiçek, Mehmet Cihat; Tunçdemir, Vahdet; Kandemir, Raif; Aydinçakir, Emre
The processes that caused removal of the upper Carboniferous to Permian sediments in the eastern Sakarya Zone, Turkey, are modeled by using of geochemical data and LA-ICP-MS U-Pb ages from detrital zircons. A felsic provenance and passive margin setting during the deposition of the upper Carboniferous catalcesme sediments are inferred from the geochemistry of sandstones (SiO2 > 85 wt%). Chemical Index of Alteration (CIA) values (75 - 81) indicate warm and humid climatic conditions and tectonic tranquility during deposition. Fifty-three (58%) concordant zircon grains produce a youngest age population in the range of 308.7 +/- 4.4 to 342.1 +/- 6.9 Ma, typical for the Variscan events. The burgundy color and upward-fining in clast size and bed thickness are the most prominent features of the concordantly overlying Hardisi Formation. Geochemistry (SiO2 = 66-81 wt%) and CIA values (58-65) of the clastic rocks point to a subduction-related tectonic setting and increasing rate of erosion in the source area. We highlight that the catalcesme sediments were deposited in a back-arc basin opened to the south of a continental ribbon separated from Gondwana. Approaching of the Paleotethyan mid-ocean ridge to the subduction zone was resulted in flattening in subducting slab, which in turn caused the back-arc basin to migrate into the interior parts of Gondwana and the former back-arc basin to evolve into a lacustrine setting. Increase in the elevation of source areas was resulted in an increase in the rate of physical erosion and trans-portation of burgundy Hardisi clastic sediments into the lacustrine basin.
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