Sürdürülebilir Kalkınma Amaçları

• 6
• 3
• 2
• 1
• 1
• 1

• MakaleAçık Erişim2021/r/munzur/5902
  The Relationship of the Hot and Mineral Springs in Munzur and Pülümür Valleys (Tunceli) with the Tectonic Structures of the Region and their Hydrogeochemical Properties

  Sançar, Taylan; Önal, Ayten Öztüfekçi

  The N-S flowing Munzur and Pülümür Rivers, which have the largest drainage areas in Tunceli Province, merge in the city center, and continue as a single river towards the south. In the southern area, there are smaller drainage areas such as Dinar and Rabat. In this study, the hydrogeochemical properties of the hot and mineral springs located in the mentioned drainage areas and the relationship of these springs with the faults in the region were investigated. The most important structural element controlling the reaching of hot and mineral springs to the surface is the primary and secondary deformation structures of the right lateral strike-slip Nazımiye Fault Zone. PermoCarboniferous aged impermeable schists form the basement rocks in the area hydrogeologically. Permian aged marble and crystallized limestones are the reservoir rocks of the hot and mineral waters which are outcropped in the drainage areas of Munzur and Pülümür Rivers. The presence of Eocene-Miocene aged semi-permeable flysch and permeable limestones cover rocks in this recharge area of the reservoir rocks indicates that the system is open. The pH and electrical conductivity of the hot and mineral waters in the system change between 5.96-6.80 and 2231-2930 μS/cm, respectively. Temperature of these waters varies between 35 to 20°C when they reach up to the surface. The total amount of dissolved solids ranges from 1300 to 1600 mg /L. The most abundant cation present in the waters is Ca+2; the most abundant anion is HCO3-. The Na-K-Mg geothermometer results of the hot and mineral waters correspond to the immature waters where the water-rock relationship is not an equilibrium. The pH and electrical conductivity of the cold waters are between 6.66 to 7.28 and 471 to 891 μS/cm, respectively. All waters examined here are of the Ca-Mg HCO3 type

  • 
  AtıfOpenAlex3

  İncele
• MakaleAçık Erişim2021/r/munzur/2591
  Mineralogical And Gemological Characteristics Of Metaophiolite Hosted Corundum (Malatya-Türkiye)

  Kaydu Akbudak, İlkay; Gürbüz, Meltem; Başibüyük, Zeynel; Hatipoğlu, Murat; Öztüfekçi Önal, Ayten; İşler, Fikret

  The corundum is found in the rocks of the Berit metaophiolite in Eastern Anatolia, near Doğanşehir a province of Malatya. Metaophiolitic rocks consist mainly of garnet metagabbro, granulite, amphibolite, mylonitic amphibolite, garnet amphibolite, amphibole schist, pyroxenite, mylonitic pyroxenite, orthopyroxenite, harzburgite, serpentinized dunite and diorite units. Corundum occurrences are mostly found in pyroxenites, amphibolites, peridotites and granulites. Their colors change in range between reddish pink, pink and light pink. They are usually in structure of translucent, vitreous and sometimes cracked. They are seen scattered or clustered together inside the rocks in which they are found. The size of their crystals ranges from 0.5 cm to 10 cm and their euhedral crystals are observed in pseudohexagonal form. As a result of the petrographic examinations, it was observed that pyroxene, amphibole, garnet and plagioclase minerals accompanied with the corundum. The samples of the rocks containing the corundum has qualifications which will be as an object of gemstone and ornament by means of cutting and shining. Large specimens of corundum can be processed alone. Samples, being as scattered and small granules inside the rock can be processed together with the host rock. In the processed samples, it was obtained patterns like the samples of corundum with zoisite which were in great demand in the world gemstone market.

  AtıfScopus3·OpenAlex4·TR Dizin2

  İncele
• MakaleAçık Erişim2020/r/munzur/4001
  Anthropogenic Pollution Assessment of Pertek (Tunceli) Geothermal Field

  Balaban, Tugbanur Ozen; Okan, Ozlem Oztekin; Sançar, Taylan; Önal, Ayten Oztufekci

  The study area is located in Pertek town in Tunceli province in Eastern Anatolia. The geology of the study area is very important for the geodynamic evolution of the Eastern Taurus. Geological formations in the study area are Paleozoic Keban metamorphics, Upper Cretaceous Harami Formation, Middle-Upper Eocene Kirkgecit Formation, Upper Miocene Karabakir Formation, and Quaternary alluvium, from the oldest to the youngest, respectively. Hydrogeological units were divided into three units in accordance with lithological, structural and hydrogeological properties. The basement of the study area of sandstone, marbles and dolomitic marbles in the Keban metamorphic rocks are highly fractured and karstified and act as the main reservoir in particular for thermal waters in the study area. Kirkgecit and Karabakir Formations occur as barrier rocks in the geothermal area due to impermeable properties. Some levels of limestone units within the Keban metamorphics are aquifers for freshwater. Alluvium is the most important and suitable unit for cold groundwater production. In the study area, streams and rivers flow from southwest to northeast towards Keban Dam Lake. The lake is very important in the region from the point of view of hydroelectric power production, flood control, and irrigation. The thermal and mineral waters generally have high mineral contents. When they are discharged onto the surface, they can cause contamination in surface water, ground water, and of soil. Because of the fact that the water resources in the region are used for drinking and irrigation purposes, the quality of the water is evaluated within the scope of this study. For this reason, water and sediment samples were analyzed for boron, arsenic and other contaminant (Pb, Fe, Sb, Sn and Hg) substances to measure the contamination. The results acquired from the analysis of water samples suggest that concentrations of B, As and Pb in some of the samples exceed the limits of the TSE drinking-water standards(>100 ppb). Fe concentration is 2.16 ppm, Hg and Sb concentrations are also 0.05 ppm. Moreover, some of the sediment samples collected from thermal springs in Singec Creek are contaminated with B, As, Sb, Hg and Pb and other elements sourced from geothermal fluids. In this study, the geochemical evaluation of the presence of B, As, and other contaminants (Pb, Fe, Sb, Sn) derived from geothermal activities within sediment and water in the Pertek Geothermal Field and surrounding area were discussed.

  AtıfWoS2·OpenAlex2·TR Dizin2

  İncele
• MakaleAçık Erişim2020Scopus SJRQ1/r/munzur/3156
  Geodynamic importance of the strike-slip faults at the eastern part of the Anatolian Scholle: Inferences from the uplift and slip rate of the Malatya Fault (Malatya-Ovacık Fault Zone, eastern Turkey)

  Sançar, Taylan; Zabcı, Cengiz; Akçar, Naki; Karabacak, Volkan; Yeşilyurt, Serdar; Yazıcı, Müge; Serdar Akyüz, H.; Önal, Ayten Öztüfekçi; Ivy-Ochs, Susan; Christl, Marcus

  Controversy remains over when present-day configuration of the Anatolia boundary faults came into existence, and the issue of what are the driving forces of the Anatolian westward motion. The NW-striking dextral and NE-striking sinistral second-order strike-slip faults at the eastern part of the Anatolian Scholle play a crucial role within these long-lasting discussions, and the NE-striking sinistral Malatya–Ovacık Fault Zone (MOFZ) is particularly important in this ongoing debate. Although the MOFZ is defined as one of the intra-plate structures, it has been proposed that it was an inter-plate fault between the Anatolia and Arabian plates from the latest Miocene to mid-Pliocene and that it has been inactive during the last ca. 3.5 Ma. This study provides results from the first morphochronology-based uplift and slip rate estimates on the Malatya Fault within the southern section of the MOFZ. The cosmogenic isochron burial and cosmogenic depth burial of ages from the sinistrally offset Tohma River remnant terraces enabled us to calculate 1.0 ± 0.01 and 1.12 ± 0.01 mm/yr minimum and maximum horizontal slip rates, respectively, for the last 1.4 ± 0.1 Ma. Furthermore, we conclude that the 96 ± 11 m/Ma mean uplift has been driven by the Malatya Fault. Integrated interpretation of the findings of this study and available data on both the MOFZ and other strike-slip faults at the eastern part of the Anatolian Scholle support the hypothesis that they are plate-boundary related active deformation belts that originated from paleotectonic structures during the tectonic escape of the Anatolian Scholle.

  AtıfScopus20·OpenAlex20

  İncele
• MakaleAçık Erişim2019Scopus SJRQ2/r/munzur/4532
  Neogene volcanism in Elazig-Tunceli area (eastern Anatolia): geochronological and petrological constraints

  Agostini, Samuele; Savasçin, Mehmet Yilmaz; Di Giuseppe, Paolo; Di Stefano, Flavio; Karaoglu, Ozgur; Lustrino, Michele; Manetti, Piero; Ersoy, Yalcin; Kürüm, Sevcan; Önal, Ayten Oztufekci

  AtıfOpenAlex15

  İncele
• MakaleAçık Erişim2019/r/munzur/5112
  Hydrogeochemical Properties of Hot and Cold Waters in Tunceli-Pertek Geothermal Area

  Önal, Ayten Öztüfekçi; Akkuş, Aysun

  The Pertek geothermal area is located near the Singec valley to the southwest of Tunceli and this field has not been previously studied in terms of hydrogeology and geothermal. The dominant rock type in the area is the Permian-Triassic aged Keban Metamorphites which are be limestone and marble. The younger magmatic and sedimentary units (Upper Cretaceous-Pertek Magmatites, Middle Eocene-Upper Oligocene-Kırkgeçit Formation, Upper Miocene-Pliocene-Karabakır Formation and Quaternary-alluvium) have contact with these metamorphics. In addition to the tectonic activity of the region, the dominant lithology of Keban metamorphites (limestone and marble), intra-unit thrust faults and normal faults, shear fractures and cracks increased the porosity and permeability of Keban metamorphics. Therefore, the most important aquifer in the region is the Keban metamorphites and these metamorphites are also the reservoir rock of the hot water in the Pertek geothermal area. The area of feeding of the groundwater in the reservoir rock is located in the north of the Singec valley and the discharge area is in the south of this valley. The feeding field of this reservoir rock is to the north of the Singec valley and the discharge area to the south of this valley. The Pertek geothermal system is an open system, since only limited areas contain semi-permeable sedimentary (Kırkgeçit Formation) and volcanic cover rocks (Karabakır Formation) in the main feeding field. The pH and electrical conductivity of the thermal waters in the system are between 6,18-7,55 and 816-2330 μS / cm respectively. The surface temperatures range from 25.5 to 38.2 ºC. The pH and electrical conductivity values ​​of cold water are between 7.52-8.31 and 402-472 μS / cm respectively. The most common cation in both hot and cold waters is Ca 2+ and the anion is HCO3-. According to IAH (1979) water classification method, hot and cold water, cold mineral water and stream water are of Ca-Mg-HCO3 type, and the lake waters of Keban dam are Ca-Mg-HCO3-SO4 type. Cold spring water is drinkable, but in hot and cold mineral waters the concentration of elements such as Ca, Mg, K, Mn, As and B is above the drinking water standards. The hot waters are generally saturated with calcite, aragonite, chalcedony, quartz and dolomite minerals. Reservoir temperatures are between 74-105°C according to silica and cation geothermometer calculations. According to the enthalpy-silica mixture model, the reservoir temperature is between 80-225 °C and the ratio of cold water mixture to hot water is between 60-88%. According to the isotope analysis, the cold waters in the Pertek geothermal area are shallow, the hot waters are deeply circulated, meteoric origin and respectively modern and sub-modern waters.

  AtıfOpenAlex1·TR Dizin2

  İncele
• MakaleAçık Erişim2019Scopus SJRQ2/r/munzur/3450
  Geochemistry of the post-collisional Miocene mafic Tunceli Volcanics, Eastern Turkey: Implications for the nature of the mantle source and melting systematics

  Aktağ, Alican; Önal, Ayten Öztüfekçi; Sayit, Kaan

  The East Anatolian Accretionary Complex (EAAC) comprises an ideal example of post-collisional volcanism within the Africa-Eurasia collision zone. The Miocene mafic Tunceli Volcanics, as a part of this post-collisional volcanic system, are located in the western termination of EAAC. The mafic Tunceli Volcanics are characterized by mildly alkaline and tholeiitic basalts, in which olivine, clinopyroxene and plagioclase characterize the main mineralogy. The role of fractional crystallization (FC) and assimilation combined with fractional crystallization (AFC) processes appear to be negligible in the petrogenesis of the primitive mafic Tunceli Volcanics. Relative enrichment in large ion lithophile elements (LILE), Th and La over high field strength elements (HFSE) and heavy rare earth elements (HREE) suggest contribution from a metasomatized mantle source. The wide range of ratios displayed by these elements also calls for some asthenospheric input for the genesis of these volcanics. The metasomatizing agents can be attributed to a past subduction event, probably during the closure of Neotethys. Considering also the geophysical constraints, which limits the lithospheric thickness to about 70–75 km around the region, a melt mixing between lithospheric and asthenospheric melts generated at different depths appear to be an important process in the petrogenesis of these lavas. The combined geochemical and geophysical data, therefore, necessitate a geodynamic model with some remnant lithospheric mantle underlying the Eastern Anatolian region.

  AtıfScopus10·WoS11·OpenAlex13

  İncele
• MakaleYalnız künye2018Scopus SJRQ1/r/munzur/4974
  Doğu Anadolu’daki Geç Miyosen volkanizmasının örneklerinden biri olan Yamadağ Volkanitleri Malatya ili

  GuRBuZ, Meltem; Önal, Ayten Öztüfekçi; Basıbüyük, Zeynel; Akbudak, Ilkay Kaydu; İşler, Fikret

  Yamadağ Volcanics which is one of the examples of the Late Miocene volcanism in Eastern Anatolia covers largeareas within the boundaries of Arguvan county of Malatya. The gemstones, subject of this research range from afew centimeters to about 30-40 cm in size and are formed in the cavities of the basalts beonging to Yamadağvolcanics. These gemstones seem to have formed as veins extending in east-west direction and consist of opal (opal-CT) and chrysocolla. Opal formations have various colours such as white, brown, yellow and greenish, while chrysocolla formations are bluish-greenish in color. both opal and chrysocolla are of massive type and their freshsurfaces display waxy luster. Mineral paragenesis and formation conditions of gemstones and are determined byapplying XRD, SEM, FT-IR techniques. ICP-MS technique is used for the determination of the geochemicalcompositions. The gemological characteristics are identified via cabochon and facet cut techniques by usingdiamond coating blade, sintered diamond abrasive discs and polishing machine. Opals are usually composed oftridymite minerals, also in some cases quartz and cristobalite minerals accompany the tridymite minerals. The EDXmeasurements reveal, enrichment of Fe and Al in opals, and of Cu in chrysocolla. The ICP-MS measurements, in chrysocollas reveal, enrichments in LIL elements such as Ba, Sr and in HFS elements such as U. Consequently,gemological studies show that the chrysocolla and opals in study area, which have waxy luster and massivestructure, are suitable for utilization as a gemstone due to its color, hardness, durability, homogeneous distributionof color and processability

  AtıfTR Dizin1

  İncele
• MakaleAçık Erişim2018Scopus SJRQ1/r/munzur/4152
  Silica gemstones formation in Yamadag volcanites (Arguvan-Malatya) mineralogical, geochemical, gemological properties and economic importance

  Akbudak, Ilkay Kaydu; Basibüyük, Zeynel; Gürbüz, Meltem; Önal, Ayten Oztufekci; Isler, Fikret

  Yamadag Volcanics which is one of the examples of the Late Miocene volcanism in Eastern Anatolia covers large areas within the boundaries of Arguvan county of Malatya. The gemstones, subject of this research range from a few centimeters to about 30-40 cm in size and are formed in the cavities of the basalts beonging to Yamadag volcanics. These gemstones seem to have formed as veins extending in east-west direction and consist of opal (opal-CT) and chrysocolla. Opal formations have various colours such as white, brown, yellow and greenish, while chrysocolla formations are bluish-greenish in color. both opal and chrysocolla are of massive type and their fresh surfaces display waxy luster. Mineral paragenesis and formation conditions of gemstones and are determined by applying XRD, SEM, FT-IR techniques. ICP-MS technique is used for the determination of the geochemical compositions. The gemological characteristics are identified via cabochon and facet cut techniques by using diamond coating blade, sintered diamond abrasive discs and polishing machine. Opals are usually composed of tridymite minerals, also in some cases quartz and cristobalite minerals accompany the tridymite minerals. The EDX measurements reveal, enrichment of Fe and Al in opals, and of Cu in chrysocolla. The ICP-MS measurements, in chrysocollas reveal, enrichments in LIL elements such as Ba, Sr and in HFS elements such as U. Consequently, gemological studies show that the chrysocolla and opals in study area, which have waxy luster and massive structure, are suitable for utilization as a gemstone due to its color, hardness, durability, homogeneous distribution of color and processability.

  AtıfOpenAlex12

  İncele
• MakaleYalnız künye2018Scopus SJRQ2/r/munzur/3691
  Assessment of pollution potential of the Hasangazi chromite pit (Tunceli, Turkey): implications for the natural environment

  Çimen, Okay; Öztüfekçi Önal, Ayten; Akyol, Eylem Akarsu

  The Hasangazi chromite pit is an abandoned mine located to the east of the town of Pülümür (Tunceli, Turkey). The surface water that circulates in the pit flows into the Pülümür stream via the Turnadere creek. The quality of the surface water and soil from the region is important regarding the ecosystem in the Tunceli area. The open pit operations in the chromite deposits may be the cause of toxic element enrichments. To understand the effects of such pits, samples from the sediments, soil, waste material, and surface water were collected from the Hasangazi pit and its surrounding area. Samples were mineralogically and geochemically analyzed by XRD, ICP-OES, and ICP-MS methods. Mineralogical analyses showed the presence of chrysotile and plagioclase in the sediment and soil samples. These samples are also enriched in toxic elements, e.g., Cr, Ni, and Co. In particular, the Cr and Ni concentrations exceed the limits of soil pollution regulation of Turkey and the US Environmental Protection Agency. Overall the Cr, Ni, and chrysotile contents demonstrate the impact of the abandoned pit and the ultramafic rocks. Moreover, the surface water samples in the dry season have Zn concentrations above the toxic levels that may have been derived from the volcanic rocks. Environmental remediation precautions should immediately be taken around this inactive pit.

  • 
  • 
  • 
  AtıfScopus6·WoS6·OpenAlex8

  İncele