114 research outputs found
Topology of soft cone metric spaces
No full textInternational Conference on Functional Analysis in Interdisciplinary Applications (FAIA) -- OCT 02-05, 2017 -- Astana, KAZAKHSTANIn Simsek's paper it was introduced a concept of soft cone metric space via soft elements and some fixed point theorems in soft cone metric space were provided. In this work, we examine topological structures such as open ball, soft neighbourhood and soft open set in soft metric spaces and their some properties, and prove that every soft cone metric space under some condition is a soft topological space according to elementary operations on soft sets.Kyrgyz Turkish Manas University [KTMUBAP-2016.FBE.12]This work is supported by Kyrgyz Turkish Manas University in the framework of Scientific Research Projects (KTMUBAP-2016.FBE.12)
Component parts of the World Heat Flow Data Collection
No full textComponent parts of the World Heat Flow Data Collectio
Structural Properties of Monolayer Boron Carbide Nanoribbons Under Strain: Molecular Dynamics Simulations
No full textStructural properties of boron carbide nanoribbons with different widths have been investigated by performing classical molecular dynamics simulations at various temperatures. Strain effect along the ribbon direction has been analyzed at two different strain rates. It was found that thin boron carbide nanoribbons showed more elongation than the thick models. The structural twisting and rotation increased at high temperatures and decreased at broad models. Furthermore, fast strain caused longer elongations and broad models compensated more strains at high temperatures with respect to the thin models
Hydrogeological and geochemical studies of the Efteni and Derdin geothermal areas, Turkey
No full textThe Efteni and Derdin geothermal areas are located in northwestern Turkey. Relatively low-temperature springs emerge from the Duzce Fault, a normal-component-dominated fault segment of the North Anatolian Fault System. The thermal waters of the Efteni and Derdin Springs show distinct geochemical and isotopic characteristics since they originate from different geothermal reservoirs and reflect the effects of different water-rock interaction processes. Geothermometry revealed higher reservoir temperatures for the Efteni system, however a strong delta(18)O shift, interpreted as being the result of isotopic exchange at high temperatures, was observed in the Derdin system. Hydrogeological and geochemical techniques are applied to identify recharge mechanisms, water-rock interaction processes and to construct conceptual models of these geothermal systems. (C) 2008 Elsevier Ltd. All rights reserved
Tracing deep thermal water circulation systems in the E-W trending Buyuk Menderes Graben, western Turkey
No full textWe present information on the spatial variation of helium isotope ratios and several conservative geochemical constituents that serve as natural tracers to identify thermal water flow systems along the E-W trending Buyuk Menderes Graben. The air-normalized R/R-A ratios (where R = sample He-3/He-4 and R-A = air He-3/He-4) of geothermal fluids in the graben range from 3.69 to 0.2. R/R-A ratios of the high temperature fluids display regular variation along the graben, from high mantle values in the east to low crustal values in the west. The highest R/R-A ratios showing significant mantle He signatures occur at the eastern segment of the graben. In the central section, R/R-A ratios are lower and vary between 1.82 and 1.14. The lowest ratio of 0.20 R-A, indicating a value of high crustal helium up to 98%, was observed in the Germencik Field, where one of the highest temperatures recorded was 232 degrees C, at the western segment of the graben. A regional variation is also apparent in the CO2-He systematics. Mantle-derived carbon proportions were found to be generally less than 2% but similar to the R/R-A ratios, the higher mantle carbon proportions occur at the eastern segment of the graben
The computation of expected values and moments of special polynomials via characteristic and generating functions
No full textA three-dimensional numerical model of Yerköy (Yozgat) hydrogeothermal system, Central Anatolia, Türkiye
No full text© 2022 Elsevier LtdYerköy geothermal field which is located in the city of Yozgat in Central Anatolian Region, is one of the low temperature fields that is investigated for geothermal heating. In 2006, two exploration/production wells were drilled at 550 m and 750 m below the surface. The maximum bottom-hole temperatures ranged from 67 °C to 72 °C, respectively in these wells. These two exploration wells are provided the new information about the geothermal field and the reservoir of Yerköy. In this study, these well-data were evaluated for the first time together with the surface data obtained from the field. The aim of this study is to develop a conceptual model of the Yerköy geothermal system using these well data and geological, hydrogeological and hydrogeochemical studies and to simulate this model to define the three-dimensionally subsurface conditions. Numerical simulation was performed by using TOUGH2 Software. The calculated model results were compared with the measured static pressure and temperature in the wells for the calibration. According to the calibrated model, the permeability values of fractured rocks and fault are between 9.0 × 10−14 and 1.0 × 10−12 m2. The geothermal fluid with a mass flow of 18 kg/s with the enthalpy of 415 kJ/kg at the base boundary rises along the fault zones and transported into the fracture systems, which we define it as the reservoir in the immediate vicinity of the faults
Hydrogeochemical and isotopic survey of Kütahya-Simav geothermal fi eld
No full textABSTRACT Simav geothermal field is located in the Simav graben system at Kütahya province in western Anatolia. Geological units are mainly consisting of formations the Menderes Massif. The Kalkan formation and Simav metamorphics consist of migmatite, gneiss and schists of PrecambrianPaleozoic age, and accorded at the basement of the study area. The sequence continues upward with laterally and vertically interbedded, Paleozoic Balikbasi (marble), Saricasu (schist) and Arikaya (crystallized limestone) formations. The Triassic -Jurassic Budagan limestone rest on the above mentioned formation with angular conformity. The Paleocene Egrigöz granite crosscut all the above mentioned units. Detritic and calcareous Kizilbük formation, Civanadag tuff and Akdag volcanic comprising of agglomerate, dacite, rhyodacite and rhyolite are Miocene in age, laterally and vertically interbedded to each other and, overlie the Egrigöz granite unconformably. Coarse detritic Toklargölü formation, Eynal formation and Nasa basalt intercalating both formations occur at the top of the sequence. All of these formations are covered by actual alluvium. Joints and fractures developed in the Nasa basalt (1. reservoir rock), the Budagan limestone (2. reservoir), marble and limestone of the Arikaya and Balikbasi formations form secondary porosity and better permeability. The Eynal formation, Akdag volcanics, Civanadag tuffs, Kizilbük formation and Saricasu formation are impermeable and are cap rocks in character. According to the data obtained from wells drilled for the drinking and irrigation water purposes, ground water flow is toward the desiccated lake. Cold water analysis gave high CO 3 +HCO 3 , Ca, Mg ion values, and low NH 4 , NO 3 , Fe, NO 2 , Al and Mn ion values. Hot water analysis gave a cation trend of Na+K >Ca>Mg and an anion trend of HCO 3 +CO 3 >SO 4 >Cl .Cold water -hot water interactions and contaminated areas were determined by doing isotherm, resistivity and hydrochemical maps. Based on saturation indices, hot waters are saturated in respect to aragonite, calcite and dolomite and this indicates that rocks at the recharge area and reservoir are calcareous in composition. Isotopic analyses have shown that geothermal water is meteoric in origin and the circulation time of water is longer than 50 years. Reservoir rock temperatures have been calculated as being 148 -180 ºC through geothermometric applications
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