Profile URL: https://hdl.handle.net/20.500.13091/11579
Job Title:Prof. Dr.
Email Address:aylabozdag@ktun.edu.tr
Main Affiliation:02.07. Department of Geological Engineering
Status: Current Staff
ORCID:
0000-0002-6114-0678
0000-0002-6114-0678Scopus ID:
55354186300
55354186300YÖK Akademik: BD24DF5B170AB57D
Google Scholar:
d6AlIBkAAAAJ
d6AlIBkAAAAJWeb of Science ID:
CIB-7881-2022
CIB-7881-2022Name Variants:
Bozdag, A. Bozdag, Ayla
28 results
Scholarly Output Search Results
Now showing 1 - 10 of 28
Conference Object Mineralogical and Stable Isotope Properties of Carbonate Minerals in Tuz Gölü Basin (turkey): Paleoenvironment Assessment(Akdeniz University, 2018) Çelik Karakaya, Muazzez; Bozdağ, Ayla; Ercan, Hatice Ünal; Karakaya, Necati; Delikan, ArifThe study area is located south of the Tuz Gölü Basin in the Central Anatolia. The investigated carbonate minerals are deposited in the Neogene lacustrine sediments. Alternations of halite, carbonate, sulfate minerals and clay-enriched levels have been observed in the ten different drillings made in the study area. The aim of this study is to investigate the properties of carbonate minerals closely related to evaporite minerals, e.g. halite and sulfate minerals. The carbonate minerals commonly observed in the region are dolomite and magnesite which are generally micritic and parallel to bedding and also, they have reticulated structures. The thickness of the carbonate minerals precipitate ranges from mm to dm, and the carbonates have been located as a matrix around other minerals in some levels. The thick carbonate levels indicate to rise of lake level or dilution of the water in the lake. In this study, four carbonate facies have been identified as microbial carbonate facies, sparitic facies, pelloidal facies and oolitic facies. Microbial carbonate facies show quite shallow environments and enriched cyanobacteria. The facies are overlain by generally sparitic cemented peloidal limestones. The Mg/Ca ratio of carbonates is quite high and these high values can be explained by dedolomitization processes. The Sr values of the carbonates range from 115-6216 ppm. The δ18O and δ13C isotope values of the dolomite samples from TG6, TG3 and TG2 drillings range from -3.38 to +5.74 ‰, and -10.78 to +0.04 ‰, respectively. Besides, δ18O and δ13C values of magnesite-rich samples vary between 7.57 and 10.46 ‰ and -4.82 and -9.49 ‰. Isotopic values, sedimentological and geochemical data of carbonates indicate that the deposition environment has sometimes been influenced by atmospheric events, wave activity and water level changes, and also biological activities are highly effective in shapka environment.Article Elemental and C, O and Mg Isotope Geochemistry of Middle-Late Miocene Carbonates From the Tuz Golü ¨ Basin (central Anatolia, Turkey): Evidence for Mediterranean Incursions(Elsevier, 2021) Çelik Karakaya, Muazzez; Bozdağ, Ayla; Karakaya, NecatiThe Tuz Golü ¨ basin, the largest of the Central Anatolian Neogene basins, is a NW-SE trending fault-controlled depression and includes many subbasins, such as the Eregli, ˘ Ulukıs¸la and Bor subbasins. In the basin, economically important evaporite deposits consisting mostly of halite, gypsum/anhydrite, glauberite and carbonates formed in the middle-late Miocene. The mineralogical and chemical properties and C, O and Mg isotopic compositions of the carbonate minerals that precipitated simultaneously with the other evaporite minerals were investigated using samples from boreholes to determine the precipitation conditions and paleoenvironment of the deposits. The lack of covariance between the δ13C and δ18O values of the samples and the wide range of isotopic compositional variations indicate a basin that was hydrologically open to some degree. In addition, the lack of correlations between δ18O values and MgO/(MgO + CaO), Mg/Ca and Sr/Ca ratios and the wide range of variations in both δ13C and δ18O values indicate that the carbonate minerals precipitated in a lagoonal environment where seawater incursions occurred through transgressions. The δ18O values of the dolomite samples are higher than those of Messinian normal-salinity seawater dolomites and therefore require contributions from evaporative fluids. Additionally, the isotopic data indicate extreme fluctuations in temperature and the inflow-evaporation balance during carbonate precipitation and indicate that the evaporite minerals may have precipitated from the evaporation of seawater trapped within the basin during and after uplift of the region. The Mg isotopic compositions of magnesium-rich carbonates are partially heterogeneous, and the δ26Mg values are higher than the δ25Mg values. Some of the δ26Mg values are close to the δ26Mg values of global seawater (–0.82‰) but higher than the global mean δ26Mg value of river water (–1.09‰). The δ26Mg values are partially within the range of marine sediments (–3.65 to +0.52‰), suggesting seawater contributions to carbonate precipitation.Article Citation - Scopus: 1Water–rock Interaction in the Geothermal Systems Related To Post-Collision Zone Volcanism: a Case Study Based on Multivariate Statistical Analysis From the Kavak Geothermal Field (konya, Turkey)(Academie des sciences, 2023-12-18) Gündüz, M.; Bozdag, A.; Bayram, A.F.; Bozdag, A.; Asan, K.; Sardini, P.Water–rock interaction is the focus of geothermal energy studies and can be documented by traditional geochemical methods such as ion ratio method and hydrogeochemical modelling etc. Statistical approaches are also vital for the quantitative models, and mainly combined with the traditional methods. In this study, we re-evaluate the published data, including water chemistry and volcanic and metamorphic whole-rock geochemistry from the Kavak geothermal field (Konya, Turkey) by using multivariate statistical analysis (e.g. factor analysis and clustering analysis) to research possible interaction between the thermal waters and surrounding rocks. The Kavak geothermal field (KGF) overlies a metamorphic basement composed of the Paleozoic metacarbonates and metaclastic rocks, yet is located near the Erenlerdağ–Alacadağ volcanic complex (ErAVC). An example of unimodal orogenic volcanism in an extensional geodynamic setting, the Neogene ErAVC is composed of widespread high-K calcalkaline andesite to rhyodacite lavas with enclaves and their pyroclastic counterparts. The Kavak geothermal field covers a small area (∼7.5 km2) and lies along the Seydişehir fault zone in the southeast of the ErAVC. The Kavak thermal waters are meteoric in origin and peripheral waters (Ca–Na–HCO3) in the geothermal system related to the orogenic volcanism. The Kavak thermal waters are characterised by high K+ and Na+ cations, and low pH (between 6.4–6.9 pH) values relative to the cold waters around the KGF. Two types of thermal waters were identified in the KGF based on the slight difference in their hydrochemistry and discharge temperature. The first type thermal water (∼22 °C) has higher TDS and Cl/Br ratio and lower dissolved silica and Br content relative to the second type of water (up to 45 °C). The chemical relationship between the KGF and high-K ErAVC is clearly seen in the cation-based diagrams. Multivariate statistical analysis confirms that first type and second type thermal waters identified based on their hydrochemistry formed two separate statistical groups, and suggests that the chemistry of the KGF waters was mainly controlled by the composition of the ErAVC rather than those of the basement metamorphic rocks as a result of water–rock interaction. © 2023 Academie des sciences. All rights reserved.Other Geochemical Compatibility Evaluation of Injection Waters for Enhanced Oil Recovery in the Halfaya Oil Field’s Mishrif Formation, Southern Iraq: A Case Study(2025) Bozdağ, Ayla; Al-asadi, Safaa A. R.; Ghalib, Hussein B.; Al‐hawash, Adnan B.; Al-qurnawi, Wasan S.Article Citation - WoS: 17Citation - Scopus: 21Origin and Evolution of Halite Based on Stable Isotopes (delta Cl-37, Delta Br-81, Delta B-11 and Delta Li-7) and Trace Elements in Tuz Golu Basin, Turkey(PERGAMON-ELSEVIER SCIENCE LTD, 2019-06-01) Ünal Ercan, Hatice; Çelik Karakaya, Muazzez; Bozdağ, Ayla; Karakaya, Necati; Delikan, Arif; Ercan, Hatice Unal; Karakaya, Muazzez CelikThe Tuz Golu basin located in Central Anatolia contains ancient (Miocene) and recent evaporite deposits. The aim of this study is to determine the origin and evolution of the ancient halite deposits in the basin, particularly whether there is a marine origin. For this purpose, the mineralogical, geochemical and isotopic properties of halite samples taken from three different drillings at the southern part of the Tuz Golu basin were determined. Halite samples in the Tuz Golu basin are characterized by Cl (60.20-61.00%), Na (39.00-39.40%) and Br (5637 ppm) contents. The Cl-, Br-, Ca, Mg2+, SO42-, and K+ values and Cl/Br (948-86428) ratios indicated that during the formation of the ancient halites in the Tuz Golu basin, the mixture of solutions had different compositions/origins and that the dissolution, recrystallization and dedolomitization mechanisms were effective. The delta Br-81,delta Cl-37, delta Li-7 and delta B-11 isotopic compositions of the pure halites range from - 0.06 to 0.82, - 0.80 to 1.28, - 0.70 to 30.60 and -14.70 to 11.60, respectively. The low delta Cl-37 (from - 0.06 to 0.06 parts per thousand), low delta Br-81 (from 0.03 to 0.95 parts per thousand), high delta B-11 (from -6.40-11.60 parts per thousand) and high delta Li-7 (from 26.00 to 30.60 parts per thousand) values clearly indicate that the brine involved in the formation of the halites of the Tuz Golu basin was largely derived from seawater during the Mid-Miocene Climatic Optimum (MMCO) period. Additionally, the Cl-, Br-, Ca2+, Mg2+, and SO42- contents, as well as the intermediate delta Br-81 (0.34-0.95 parts per thousand) values of the Tuz Golu samples, indicated that the origin of the ancient halites in the basin is not only a marine composition but also a mixture of solutions having different compositions, ratios or origins (e.g., seawater or saline water and groundwater/fresh water).Conference Object Mineralogical Characterıstıcs of Neogene Sulphate Minerals in the Southern of Tuzgolu Basin, Turkey(Akdeniz University, 2018) Çelik Karakaya, Muazzez; Bozdağ, Ayla; Ercan, Hatice Ünal; Karakaya, Necati; Delikan, ArifThe studied sulfate minerals are located in southern part of Tuz Gölü basin. The Na-Ca-Mg sulfate minerals determined in the basin range from the simple anhydrous salts such as anhydrite, glauberite, thenardite, to simple hydrous salts such as gypsum, eugsterite, starkeite, and also a series variably hydrated Na-Mg sulfates ranging from blöedite, mirabilite and epsomite to löweite. In this study, it has been aimed to investigate the depositional environments and syn-depositional or post-depositional properties of the sulphate minerals. Gypsum is generally the first sulfate mineral formed thermodynamically, and then the gypsum transforms to anhydrite when it just lost two mole H2O. Glauberite is the next sulfate mineral either precipitated with halite or form as a reaction product with anhydrite or gypsum. Mg-sulfate minerals initially precipitate as epsomite then altered to thenardite. Syn-depositional features identified in the sulfate minerals are bed-form structures, vertically oriented euhedral crystals, detrital substrate (siliciclastic sediments), pellets and dissolution or erosion surfaces, and these fabrics have been preserved at the levels including gypsum, anhydrite and glauberite. Porphyroblast, poikilitic growth determined in the sulphate minerals are also typical features of syn-depositional crystallization. Dissolution-reprecipitation features are generally common in gypsum, anhydrite and glauberite minerals which show rounding of euhedral crystals terminations, followed by new syntaxial growth. Additionally, biological processes being syn-depositional feature lead to the form of lenticular minerals. Post-depositional features are very susceptible to alteration caused by increasing in temperature and pressure during burial. Generally, gypsum and epsomite minerals have altered when waters hydration has been released. Disruption and destruction of sedimentary structures have been observed in the levels such as mosaic textures, folds, slabs, fractures, veins. Intrasediment growth of anhydrite nodules has been also detected in all levels of the bore holes. In addition to, different types of several paedomorphic replacements such as gypsum-anhydrite, gypsum/anhydrite-glauberite and glauberite/anhydrite-halite have been determined in the sulfate minerals. Sulfate mineralogy of the Tuz Gölü basin is a key role to understand the water hydrochemistry causing precipitation, and this brine may originate from i) reprecipitation of the Eocene-Oligocene evaporates ii) also inflow of seawater (mixing with non-marine or hydrothermal inflow, and iii) de-dolomitization process.Conference Object Irrigation Water Quality Assessment Of Alibeyhüyüğü (çumra-konya) And Its Vicinity(ISPEC Publishing House, 2019) Bozdağ, AylaThis study was performed to evaluate the quality and suitability of groundwater resources as irrigation water in the Alibeyhüyüğü (Çumra) and its vicinity, Central Anatolia, Turkey. With this purpose, nitrogen and its derivatives (NO3, NO3-H, NH3, and NH4) electrical conductivity (EC), sodium percentage (Na %), sodium adsorption ratio (SAR), magnesium ratio (MR), residual sodium carbonate (RSC), permeability index (PI) and Kelly’s index (KI) parameters and Wilcox and US salinity laboratory diagrams were used. According to the Wilcox classification, most of the groundwater samples are in “excellent” category while only 4 samples are in “excellent to good” category. Additionally, in the US salinity laboratory diagram, 57 % of the groundwater samples are in C2S1 class and 43 % of the groundwater samples are in C3S1 class, and these type waters can be used for irrigation in almost all soil types with little danger of exchangeable sodium. Based on the SAR, Na%, RSC, PI and KI, it was determined that groundwater is suitable for irrigation. Only 3 samples in terms of the magnesium ratio are not suitable for irrigation. According to the Water Pollution Control Regulation, 29%, 21%, 48% and 2% of the groundwater samples in terms of nitrate are I., II., III. and IV. quality waters, respectively. Although the concentration of nitrate in groundwater samples did not reach dangerous levels, it is more than 10 mg/l in 50% of the groundwater samples, indicating pollution caused by agricultural activities in the region.Conference Object The Evidence of Some Stable Isotope Compositions of the Miocene Halites Related To the Origin of the Salts (tuz Gölü, Turkey)(2019) Ünal Ercan, Hatice; Çelik Karakaya, Muazzez; Bozdağ, Ayla; Karakaya, NecatiThe study area located in the south of Konya Closed Basin, Central Anatolia contains ancient (Miocene) and recent evaporite deposits. This study aims to determine the origin of the Miocene halites of the Tuz Gölü basin based on isotope data. For this aim, the isotopic properties of halite samples taken from three different drillings in the study area were investigated. The δ81Br, δ37Cl, δ7Li, and δ11B isotopic compositions of the pure halites range from −0.06 to 0.82, −0.80 to 1.28, −0.70 to 30.60 and −14.70 to 11.60, respectively. The low δ37Cl, δ81Br and high δ11B, δ7Li values indicate that the brine involved in the formation of the halites of the Tuz Gölü basin was largely derived from seawater. Additionally, intermediate and high δ37Cl, δ81Br and low δ11B, δ7Li values of the investigated samples refer that the origin of the ancient halites in the basin is not only a marine composition but also a mixture of solutions having different compositions or origins (e.g., seawater or saline water and groundwater/freshwater).Article Citation - WoS: 6Citation - Scopus: 9Origin of Miocene Halite From Tuz Golu Basin in Central Anatolia, Turkey: Evidences From the Pure Halite and Fluid Inclusion Geochemistry(ELSEVIER SCIENCE BV, 2019-07-01) Çelik Karakaya, Muazzez; Bozdağ, Ayla; Ünal Ercan, Hatice; Karakaya, Necati; Delikan, Arif; Ercan, Hatice Unal; Karakaya, Muazzez CelikThe study area is located in the south of Konya Closed Basin which is the largest Miocene inner basin in Central Anatolia. The aim of this study is to determine the chemical composition of the Miocene halite deposits and depositional environments of Tuz Golu lacustrine basin. For this scope, fluid inclusion analyses (K+, Mg2+, SO42-) of nine pure halites were performed and twenty six pure halite samples have been examined. Additionally, K+, Mg2+, SO42- ion concentrations of the fluid inclusions and pure halite samples were compared to Gulf of Suez (GS), Red Sea (RS) and other Cenozoic seawaters (CS). Results from analyses show that K+ content of the fluid inclusions of the halites in the Tuz Golu basin, which are considerably higher than the K+ contents both of the pure halites and the GS and RS and CS, result from dissolution of the primary K+-salts. The Br-content of the pure halite samples is ranging from 5 to 637 ppm. The high Br-(> 40 ppm) content indicates the marine origin while the low Br-content is related to dissolution and recycled of the previously deposited marine halites. Mg2+ and SO42- contents of the Tuz Golu basin samples are higher than those of the GS and RS and CS except for TG4 samples. The high Mg2+ and SO42- contents were resulted from the dissolution of previously deposited gypsum and de-dolomitization process. delta S-34 isotope (18.80 to 21.00 parts per thousand) and low delta O-18 (8.10 to 9.50 parts per thousand) values of the Tuz Golu basin samples, which are compatible with isotope values of the CS, indicate marine origin. In addition, the high delta O-18 values (16.20 to 20.50 parts per thousand) and the delta S-34 content can be explained by recycling of marine sulphate as well as dissolution and re-crystalization of previously deposited sulphates. The possible effective mechanisms causing chemical differences in the Tuz Golu basin, which is a sedimentary basin formed under highly complex different physico-chemical mechanisms, have been detected as (1) the changes in chemistry of halites due to dissolution and re-crystallization processes of previously deposited halites and evaporites, (2) de-dolomitization processes and (3) seawater input.Article Citation - Scopus: 2Spatiotemporal Analysis of Water Quality Using Water Quality Index and Heavy Metal Pollution Index: a Case Study of Al-Diwaniyah River, Iraq(Publishing house Mining book, 2023-01-30) Al, Asadi, S.A.R.; Beg, A.A.F.; Al, Kifarea, H.M.A.; Bozdag, A.; Ghalib, H.B.; Al Kifarea, Hider M.A.; Al Asadi, Safaa A.R.The current study aims to assess the water quality of the Al-Diwaniyah River in the city of Al-Diwaniyah to drink in terms of chemical properties and heavy metals and their impact on the health of the local population. The results showed that most of the parameters in the river water are of low concentrations due to the limited human activities in polluting the river water. The study concluded that the water quality is suitable for drinking depending on major cations and anions in all seasons. The Heavy Metal Pollution Index (HPI) showed that the river water was clean and safe, except two slightly polluted samples. The study concluded that river water for drinking or various domestic uses does not pose any danger to human health if there are no other polluting factors. © 2023 Publishing house Mining book. All rights reserved.
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| Journal | Count |
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