Maden Fakültesi

Bu topluluk için Kalıcı Uri

http://hdl.handle.net/11527/19894

Gözat

Başlık ile Maden Fakültesi'a göz atma
  • Öge
    8. Uluslararası Yerbilimlerinde Öğrenci Bitirme Tasarım Projeleri Sempozyumu, İ. T. Ü. Maden Fakültesi, İstanbul, 2021
    (İTÜ, 2021-07) Maden Mühendisliği ; Cevher Hazırlama Mühendisliği ; Jeofizik Mühendisliği ; Kuzu, Cengiz ; Tunçdemir, Hakan ; Özdamar, Şenel ; Aghayeva, Marziya
    “YER2021, Yerbilimlerinde Öğrenci Bitirme Tasarım Projeleri Sempozyumu” İTÜ ve AZTU rektörlerinin de katılımıyla çevrimiçi olarak açılmış; Azer Gold, DSİ ve ETİ Bakır A.Ş.’den konuk konuşmacıların kendi alanlarıyla ilgili konularda yaptıkları ilginç sunumlarla zenginleşmiştir. Bilindiği üzere YER Sempozyumları, Fakültemiz Bölümleri ’nden son bir yılda mezun olan öğrenciler ile tez danışmanlarının yoğun emek harcayarak ürettikleri bitirme çalışmalarının bilim camiası ile paylaşılması amacıyla her yıl Haziran ayında düzenlenmektedir. Bu yıl da sempozyum Azerbaycan Teknik Üniversitesi’nden (AZTU) öğrencilerin de katılımı ile uluslararası bir mahiyet kazanmış; AZTU, fakültemiz bölüm başkanlıkları ve ilgili komisyonları tarafından seçilen 36 öğrencinin posterleri ve 6 öğrencinin de hazırladığı sunumlar çevrimiçi olarak yapılan sempozyumda yer bilimleri camiasıyla buluşmuştur. Sempozyum içeriği olarak Maden Mühendisliği Bölümü 47, Cevher Hazırlama Mühendisliği Bölümü 24, Jeofizik Mühendisliği Bölümü 19 bildiriyle ve birden fazla öğrenci grubuyla oluşturulmuş takım çalışması mahiyetindeki çalışmalarıyla Jeoloji Mühendisliği Bölümü 7, Petrol ve Doğal Gaz Mühendisliği Bölümü 13 bildiri ve AZTU da 6 bildiri ile sempozyuma katkı sağlamıştır.
  • Öge
    A comprehensive study on methane adsorption capacities and pore characteristics of coal seams: implications for efficient coalbed methane development in the Soma Basin, Türkiye
    (Springer, 2024) Esen, Olgun ; Fişne, Abdullah ; 0000-0001-8015-0962 ; 0000-0001-7449-0573 ; Maden Mühendisliği
    This study represents a comprehensive assessment of methane adsorption capacity and pore characteristics for the coal seams of the Soma Basin in Western Türkiye, with a focus on their implications for coalbed methane potential. Twenty-one exploration wells were utilized to obtain coal samples from the kP1 and kM2 coal seams in the Kınık coalfield of the Soma Basin. High-pressure methane adsorption experiments using the indirect gravimetric method were conducted to quantify the storage capacities of these coal seams. Results revealed a wide range of methane adsorption capacities, ranging from 10.5 to 28.3 m3/t (air-dry basis), indicating significant methane storage potential for the kP1 and kM2 coal seams. The gas contents, ranging from 1.1 to 4.3 m3/t (as-received basis), suggested that the coal seams were undersaturated. Low-pressure N2/CO2 adsorption tests, along with standard proximate and gross calorific value analyses, were performed to investigate the influence of coal quality and pore characteristics on methane adsorption capacities. The findings demonstrated correlations between coal quality parameters and adsorption capacity, with ash yield showing a moderately negative correlation and fixed carbon content and gross calorific values exhibiting moderately positive correlations. Microporosity was identified as the critical factor governing methane adsorption, with a strong positive correlation observed between micropore surface areas and volumes and adsorption capacity. These results highlight the significant methane storage capacities of the coal seams in the Soma Basin and underscore the importance of micropores in determining methane adsorption capacity. The findings provide valuable insights for optimizing methane extraction and utilization in the region and offer important considerations for reservoir characterization and development strategies in similar low-rank coal deposits.
  • Öge
    Assessment of geothermal power potential in Buyuk Menderes Basin, Turkey
    (Elsevier, 2020) Yamanlar, Şenol, ; Korkmaz Başel, Emine Didem ; Serpen, Ümran ; https://orcid.org/0000-0001-7713-9551 ; Petroleum and Natural Gas Engineering Department
    Turkey’s installed geothermal capacity for power generation as of December 2019 is 1500 MWe. Most of this installed capacity is generated by the power plants located in the Buyuk Menderes graben. Geologically Buyuk Menderes graben is a huge structure having several discovered geothermal resources and can be considered as a geothermal basin. The aim of this study is to estimate the geothermal power potential of Buyuk Menderes graben. To achieve this object, a stochastic methodology, which is used to evaluate hydrocarbon-bearing basins, is adapted from the oil and natural gas industry. This methodology provides a way to quantify the geothermal potential in a range of possible values by evaluating the individual fields in the basin using stored heat technique. A total of 34 (21 proven and 13 probable occurrences) geothermal fields having medium to high temperature (T ≥ 100 °C) values are evaluated using the Monte Carlo Simulation technique. In these simulations, available geological, geochemical, geophysical data are used along with the data obtained from the drilled wells in the region. The power potential (MWe) values for 21 proven fields in terms of P10, P50 and P90 values are determined to be 888, 1077 and 1311 MWe, respectively. Considering the 13 probable occurrences along with the proven fields, the lower and upper limits of the total power potential (P10 and P90) are 1156 and 1580 MWe, respectively. Moreover, the power potentials are also evaluated under the presence of uncertainty. By assigning 5/13, 6/13, and 7/13 probability values for the 13 probable occurrences, overall geothermal power potential P10 values are estimated as 1041, 1075, and 1101 MWe, respectively.
  • Öge
    Assessment of geothermal power potential in the Gediz Basin, Turkey
    (Elsevier, 2022) Serpen, Umran ; Çobanoğlu, Melih ; Korkmaz, E. Didem ; Demirkıran, Zülfü ; Kılınç, Gizem ; https://orcid.org/0000-0001-7713-9551 ; Petroleum and Natural Gas Engineering Department
    By the end of 2020, the installed geothermal power capacity in Turkey reached 1643 MWe. Approximately one-fifth of the capacity of the installed power plants is located at the Gediz graben, which is geologically the second largest structure of the Menderes Massif. The Gediz graben has several geothermal surface manifestations and geothermal resources that have been discovered. When considering the structural/geological similarities between the Buyuk Menderes and the Gediz graben, both regions can be assessed as geothermal basins. The scope of this study is to estimate the geothermal power potential of the Gediz graben. To achieve this, a different stochastic approach is used rather than the conventional geothermal resource assessment. This approach involves using temperature depended volume distributions obtained from drilled wells, which lead to improved and solid results. Three hot anomalies that are identified from temperature dependent volumes are evaluated using the Monte Carlo Simulation technique. In these simulations, distribution data of other parameters are used along with data obtained from the drilled wells in the region. The power potential (MWe) values for three identified anomalies in terms of P10, P50 and P90 values are estimated to be 825, 1157 and 1524 MWe, respectively. Furthermore, additional geothermal potential discovery is predicted in the graben, provided that extensive efforts are exerted. Keywords: Menderes Massif; Gediz graben; Resource assessment; Geothermal basin assessment; Geothermal power potential estimation; Turkey
  • Öge
    Depth-dependent anisotropy along northwest segment of the North Anatolian fault zone : evidence for paleo-tectonic structures contributing to overall complexity
    (Wiley, 2024) Keleş, Derya ; Eken, Tuna ; Licciardi, Andrea ; Frederiksen, Andrew W. ; Taymaz, Tuncay ; orcid.org/0000-0002-7586-073X ; orcid.org/0000-0001-7980-9715 ; orcid.org/0000-0002-8830-6228 ; orcid.org/0000-0002-6938-6007 ; orcid.org/0000-0001-6807-9622 ; Jeofizik Mühendisliği
    The North Anatolian Fault Zone (NAFZ) is a prominent tectonic structure with a significant impact on the observed active deformation in Türkiye. Detailed knowledge of the seismic anisotropy in the crust and mantle along this nascent shear deformation zone provides insights into the kinematics associated with past and present tectonic events. We employed teleseismic earthquakes observed by the Dense Array North Anatolia seismic network to map 3- D variations in crustal and mantle anisotropy in/around the NW segment of the NAFZ. To achieve this, we first performed a harmonic decomposition analysis of P-receiver functions. The results were then used as a priori information to conduct an anisotropic receiver function inversion with the Neighborhood Algorithm that enabled imaging of the actual orientation and geometry of anisotropic structures. SKS splitting measurements are further used to make a comparison between the anisotropic behavior of crustal and mantle structures. Crustal anisotropy parameters estimated in our analyses/models well identify the signature of deformation caused by accumulated strain in the earthquake cycle through the strike of shallow cutting faults in the brittle crust beneath the NAFZ. Diffuse intense anisotropic energy at lower crustal depths was attributed to lattice preferred orientation of crystals or partially molten lenses elongated along the shear direction. Strong harmonic energy variations beneath the northern part of the Istanbul Zone likely reflect imprints of LPO-originated frozen fabric at shallow depths (0–20 km) associated with the palaeotectonic Odessa Shelf, Intra-Pontide Suture Zones or remnants of the Tethys Ocean.
  • Öge
    Geothermal boom in Turkey : growth in identified capacities and potentials
    (Elsevier, 2014) Korkmaz, E. D. ; Serpen, U. ; Satman, A. ; https://orcid.org/0000-0001-7713-9551 ; Petroleum and Natural Gas Engineering Department
    Increasing activities of geothermal development especially in the last three years result in a geothermal boom in Turkey. Not only the addition of new sites, but also updating the data of existing ones increased the currently identified capacity significantly. With the discoveries of 13 new geothermal fields, power potentials increased by 1.6 times. This study deals with hydrothermal and EGS potentials of Turkey. The geothermal resource base between 0 and 3 km depth in Turkey and the capacity of the currently identified 290 geothermal sites are determined to be 3.96 × 1023 J and 10,576 MWt, respectively. As of today, a total of 135 hydrothermal fields were individually studied, of which 38 medium to high temperature (T ≥ 100 °C) fields were simulated to estimate the power generation. The remaining 97 fields were simulated to estimate the direct use potentials. The lower and upper limits of power generation potential corresponding to P10 and P90 values are 1673 and 3140 MWe, respectively. Moreover, the lower and upper thermal potential limits of 135 hydrothermal fields corresponding to P10 and P90 values are 38.2 and 68.4 GWt, respectively.
  • Öge
    Geothermal energy in Turkey: 2008 update
    (Elsevier, 2009) Serpen, Ümran ; Aksoy, Niyazi ; Öngür, Tahir ; Korkmaz Başel, Emine Didem ; https://orcid.org/0000-0001-7713-9551 ; Petroleum and Natural Gas Engineering Department
    Geological studies indicate that the most important geothermal systems of western Turkey are located in the major grabens of the Menderes Metamorphic Massif, while those that are associated with local volcanism are more common in the central and eastern parts of the country. The present (2008) installed geothermal power generation capacity in Turkey is about 32.65 MWe, while that of direct use projects is around 795 MWt. Eleven major, high-to-medium enthalpy fields in western part of the country have 570 MWe of proven, 905 MWe of probable and 1389 MWe of possible geothermal reserves for power generation. In spite of the complex legal issues related to the development of Turkey's geothermal resources, their use is expected to increase in the future, particularly for electricity generation and for greenhouse heating.
  • Öge
    Microbialites on the northern shelf of Lake Van, eastern Türkiye : morphology, texture, stable isotope geochemistry and age
    (Wiley, 2024) Çağatay, M. Namık ; Damcı, Emre ; Bayon, Germain ; Sarı, Mustafa ; orcid.org/0000-0003-4677-3802 ; Jeoloji Mühendisliği
    Lake Van, the world's largest alkaline lake, hosts some of the largest microbialite towers worldwide, which are considered as modern analogues of ancient stromatolites. This study investigates the links between microbialite evolution, geology, climate and hydrology, and the role of biotic and abiotic processes in microbialite growth and morphology. For these objectives, the northern shelf of Lake Van was surveyed by sub-bottom seismic profiling and diving, and two 9 m and 15 m high microbialite chimneys were sampled at 25 m water depth. Samples were analysed for stable oxygen and carbon isotopes, X-ray diffractometry, scanning electron microscopy and U/Th age dating. Lake Van microbialites precipitate wherever focused Ca-rich groundwater flows onto the lake floor to mix with alkaline lake water. Variable columnar, conical and branching morphologies of the microbialites indicate various processes of formation by groundwater channelling within the chimneys. Collectively, our data suggest that the microbialite chimneys have formed within the last millennium, most likely starting during the warm and humid Medieval Climate Anomaly (ca ad 800–1300), when lake level rose approximately to the present level due to enhanced Inputs of riverine Ca-rich freshwater and groundwater. Our new scanning electron microscopy observations indicate that the internal structure of the microbialites below the outer cyanobacteria-covered crust is constructed by calcified filaments, globular aggregates and nanocrystals of algal, cyanobacterial and heterobacterial origins and inorganically precipitated prismatic calcite crystals. These textural features, together with dive observations, clearly demonstrate the important role of inorganic carbonate precipitation at sites of groundwater discharge, followed by cyanobacteria and algal mucilage deposition and microbially meditated calcification in the photic zone in the rapid growth of the microbialite chimneys. Considering the close similarities of some textures with those of ancient stromatolites and meteorites, the results of this study provide new insights into the environmental conditions associated with stromatolite formation and extra-terrestrial life evolution.
  • Öge
    MÜHJEO'2021 ulusal mühendislik jeolojisi ve jeoteknik sempozyumu bildirileri
    (İstanbul Teknik Üniversitesi ve Mühendislik Jeolojisi Derneği, 2021) ; Jeoloji Mühendisliği ; Mahmutoğlu, Yılmaz ; Angı, Osman Serkan ; Kumsar, Halil ; Çelik, Sefer Beran
    Mühendislik Jeolojisi Derneği (MühJeoDer) tarafından iki yılda bir düzenlenmesi geleneksel hale gelen Mühendislik Jeolojisi ve Jeoteknik Sempozyumlarının dördüncüsü “MUHJEO’2021” Istanbul Teknik Üniversitesi ile Mühendislik Jeolojisi Derneği’nin ortak katkılarıyla 21-23 Ekim 2021 tarihleri arasında planlanmış, ancak Covid Salgını nedeniyle ertelenerek 2-4 Haziran 2022 tarihinde Istanbul Teknik Üniversitesi Ayazağa Yerleşkesi Süleyman Demirel Kültür Merkezi’nde gerçekleştirilmiştir. Ulusal düzeyde düzenlenen ve yürütülen MUHJEO’2021 Sempozyumunda, yer özellikleri ve koşullarının belirlenmesi, dayanım ve davranışlarının araştırılması ve açıklanması, yerkabuğu ile her türden etkileşimin planlanması, projelendirilmesi ve yürütülmesi için temel oluşturan mühendislik jeolojisi ve jeoteknik çalışmaların bilimsel bir ortamda paylaşılması amaçlanmıştır. Sempozyumda, ulusal ve uluslararası düzeyde uygulamaya yönelik sürdürülen araştırmalardan elde edilen teknik ve bilimsel veri ile bulguların sunularak tartışmaya açılması ve bu alanda çalışan akademisyenlerin, araştırmacıların, mühendislerin, uygulayıcı kurum-kuruluş mensuplarının ve öğrencilerin aynı platformda buluşturulması hedeflenmiştir. MÜHJEO’2021 Sempozyum Programında, 1 Çağrılı Konuşma, 56 Sözlü ve 12 Poster Sunum yer almıştır. Sempozyumun Oturumları; Planlama ve Proje Tasarımında Mühendislik Jeolojisi, Jeomekanik, Jeodinamik Süreçler, Yeraltı Açıklıkları, Kent ve Çevre Jeolojisi, Mühendislik Jeolojisinde Jeofizik Yöntemler, Kaya ve Zeminlerin Mühendislik Özellikleri, Yamaç ve Şev Duraylılığı, Jeoteknik Ölçüm ve İzleme Teknikleri, Su Tutma Yapıları, Mühendislik Jeolojisinde Tehlike ve Risk, Doğal Yapı Malzemeleri ve Yüzey ve Yeraltısuları konu başlıkları altında düzenlenmiştir
  • Öge
    Slope stability analysis applied to the 5th section of the Northern Marmara Motorway, İzmit, Türkiye
    (Springer, 2024) Çakıner, Müge ; Bozkurtoğlu , Erkan ; Karakaş, Ahmet ; 0000-0002-2855-7113 ; 0000-0003-4534-5611 ; 0000-0002-4672-2063 ; Jeoloji Mühendisliği
    The Northern Marmara Motorway is a project that aims to alleviate the heavy traffic congestion in the provinces of İstanbul, Tekirdağ, Kocaeli and Adapazarı. Within the 5th section bounded by “the Motorway Port Connection Road” and “İzmit Intersection”, mass movements of slide (Y1, Y2) and flow (Y3) types were observed along the route. This study investigated the causes of mass movements in the Korucu Formation, which consists of sandstone and shale alternation. It also evaluated the support systems to prevent these movements. The analysis considered project criteria, both static and dynamic conditions, types of mass movements and triggering factors. The study identified a combination of factors, including the water table and surface waters, which lead to progressive weathering and mass movement. Stability analyses were conducted for specific right-cut slope sections. These analyses included assessments of soil structure, soil–rock mechanics, engineering geology and geotechnics, as well as examination of field and laboratory test results. These analyses aimed to comprehensively investigate and understand the factors influencing the occurrence of mass movements, particularly for km: 170 + 300–170 + 400, km: 170 + 640 and km: 175 + 297–175 + 463. At Y1, pile retaining walls are proposed using Slide2 software to reduce the slope angle from 22° to 17°. At Y2, a translational landslide occurred with recommendations for the adjustment of the slope angle and protective measures considering the disturbance factors (D = 0.3 and D = 0.5). Y3 was a flow-type movement that required protection of the slope with riprap due to the different geological conditions and disturbance factors. This study underlines the need for a comprehensive geological analysis and structural measures to ensure safety in these areas.
  • Öge
    Source geometry and rupture characteristics of the 20 February 2023 Mw 6.4 Hatay (Türkiye) earthquake at southwest edge of the East Anatolian Fault
    (Wiley, 2024) Yolsal-Çevikbilen, Seda ; Taymaz, Tuncay ; Irmak, Tahir Serkan ; Erman, Ceyhun ; Kahraman, Metin ; Özkan, Berkan ; Eken, Tuna ; Öcalan, Taylan ; Doğan, Ali Hasan ; Altuntaş, Cemali ; orcid.org/0000-0002-7250-4617 ; orcid.org/0000-0001-6807-9622 ; Jeofizik Mühendisliği
    Following the catastrophic 6 February 2023 Mw 7.8 and Mw 7.6 Kahramanmaraş earthquakes in the East Anatolian Fault Zone (EAFZ; southeast Türkiye), numerous aftershocks occurred along the major branches of this left-lateral shear zone. The spatio-temporal distribution of the earthquakes implied the stress-triggering effects of co-seismic ruptures on closely connected fault segments over large distances. On the 20 February 2023 two earthquakes with Mw 6.4 and Mw 5.2 struck Hatay (Türkiye) located near the Samandağ-Antakya segment of the EAFZ. To understand the rupture evolution of these earthquakes, we first re-located the aftershock sequence that occurred over a 3-month period in the Hatay-Syria region. A normal faulting mechanism with a significant amount of left-lateral strike-slip component at a shallow focal depth of 12 km was estimated for the 2023 Mw 6.4 earthquake from the inversion of seismological data. Our slip models describe a relatively simple and unilateral rupture propagation along about 36 km-long active segments of the EAFZ. The co-seismic horizontal displacements inferred from the Global Navigation Satellite System data are compatible with the oblique slip kinematics. Furthermore, we suggest that this earthquake did not produce notable tsunami waves on the adjacent coasts since the rupture plane did not extend to the seafloor of the Eastern Mediterranean with substantial amount of vertical displacement. We reckon that a future large earthquake (Mw ≥ 7.0) in the Hatay-Syria region where increased stress was transferred to the fault segments of the EAFZ and the Dead Sea Fault Zone (DSFZ) after the 2023 earthquakes will be a probable source of tsunami at the coastal plains of the Eastern Mediterranean Sea region. Key Points The 20 February 2023 Mw 6.4 Hatay (Türkiye) earthquake indicates a normal fault mechanism with a significant left-lateral strike-slip component Transtensional deformation is evident in the Hatay-Syria (SE Türkiye) region Most of the 2023 Hatay-Syria aftershocks appear to concentrate on the depth range of 10–20 km of the crust Plain Language Summary The destructive 6 February 2023 Mw 7.8 and Mw 7.6 SE Türkiye earthquakes triggered an intense seismic activity along the major segments of the East Anatolian Fault Zone (EAFZ) in SE Türkiye. On 20 February 2023, distinct earthquake clusters occurred along the Amanos and Samandağ-Antakya segments in the southwest edge of the EAFZ. In this manuscript, source characteristics and rupture kinematics of the 20 February 2023 Mw 6.4 Hatay (Türkiye) earthquake were estimated by analyzing seismological and geodetic data. Our results mainly indicate a normal faulting mechanism with a significant amount of left-lateral strike-slip component for this earthquake. The slip models show a simple slip distribution pattern along the strike of the fault plane that lasted about 10–12 s. The analyzed time series of the available Global Navigation Satellite System stations present horizontal co-seismic displacements consistent with oblique slip kinematics of the rupture. We finally suggest that this earthquake serves as a reminder of the seismic and tsunami hazard potential in the Hatay-Syria area.
  • Öge
    Thrace basin—an oligocene clastic basin formed during the exhumation of the rhodope complex
    (Wiley, 2023) Okay, Aral I. ; Özcan, Ercan ; Siyako, Muzaffer ; Bürkan, Kerem A. ; Kylander-Clark, Andrew R. C. ; Bidgood, Michael D. ; Shaw, David ; Simmons, Michael D. ; orcid.org/0000-0003-2398-5386 ; orcid.org/0000-0002-4034-644X ; Jeoloji Mühendisliği
    Some orogenic sedimentary basins are difficult to assign to a particular category. An example is the hydrocarbon-bearing Thrace Basin in the northern Aegean. It has more than 9-km-thick Cenozoic clastic sediment, and is spatially associated with the Rhodope metamorphic core complex in the west, and with the Tethyan subduction-accretion complexes in the south, and is cut by the North Anatolian Fault and its precursors. It has been interpreted variously as an intramontane, a forearc, or an orogenic collapse basin. Here, we provide new geochronological and biostratigraphic data to constrain the tectonic evolution of the Thrace Basin. The new data indicate that as an individual depocenter the Thrace Basin has a short age span (late Eocene—Oligocene, 36–28 Ma) and more than 90% of the basin fill consists of early Oligocene (34–28 Ma) siliciclastic turbidites, deposited at rates of 1.0 km/my. Paleocurrents and new detrital zircon U-Pb ages show that the Rhodope Complex was the main sediment source. The exhumation of the northern Rhodope Complex (36–28 Ma) was coeval with the main subsidence in the Thrace Basin (34–28 Ma), and involved clockwise crustal rotation in the northern Aegean and possibly crustal flow from underneath the Thrace Basin. Crustal rotation is indicated by the paleomagnetic data, regional stretching lineations in the Rhodope Complex, and the triangular shape of the Thrace Basin. The rotating crustal block must have been bounded in the south by a sinistral fault zone; the location of which corresponds largely with the present day North Anatolian Fault. Key Points Thrace Basin is a late Eocene - Oligocene clastic basin with >90% of the sedimentary fill deposited in the early Oligocene at rates of 1.0 km/my The main subsidence in the Thrace Basin (34-28 Ma) was coeval with the exhumation of the northern Rhodope Complex (36-28 Ma), which was the major sediment source The exhumation of the Rhodope Complex and the formation of the Thrace Basin involved crustal rotation and possibly crustal flow
  • Öge
    Uluslararası katılımlı 9. jeokimya sempozyumu bildiri özetleri kitabı: Aydın, 17–20 Ekim 2022
    (İTÜ Yayınevi, 2022-11-20) Jeoloji Mühendisliği ; Lermi, Abdurrahman ; Şaşmaz, Ahmet ; Yıldız, Ahmet ; Karayiğit, Ali İhsan ; Şen, Cüneyt ; Altınok, Efem ; Çiftçi, Emin ; Esenli, Fahri ; Aydın, Faruk ; Yavuz, Fuat ; Bozkaya, Gülcan ; Topuz, Gültekin ; Öztürk, Hüseyin ; Yolcubal, İrfan ; Keskin, Mehmet ; Karaman, Muhittin ; Afşin, Mustafa ; Aysal, Namık ; Hanilçi, Nurullah ; Yiğit, Özcan ; Şahin, Sabah ; Kadir, Selahattin ; Köseoğlu, Şafak ; Altunkaynak, Şafak ; Can Genç, Şengül ; Oyman, Tolga ; Eyuboğlu, Yener ; Demir, Yılmaz ; Kadıoğlu, Yusuf Kaan ; Karslı, Orhan
  • Öge
    WinClbclas, a Windows program for columbite-supergroup minerals
    (Cambridge University Press, 2024) Yavuz, Fuat ; Jeoloji Mühendisliği
    A Microsoft® Visual Basic software, WinClbclas, has been developed to calculate the chemical formulae of columbite-supergroup minerals based on data obtained from wet-chemical and electron-microprobe analyses and using the current nomenclature scheme adopted by the Commission on New Minerals, Nomenclature and Classification (CNMNC) of the International Mineralogical Association (IMA) for columbite-supergroup minerals. The program evaluates 36 IMA-approved species, three questionable in terms of their unit-cell parameters, four insufficiently studied questionable species and one ungrouped species, all according to the dominant valance and constituent status in five mineral groups including ixiolite (MO2), wolframite (M1M2O4), samarskite (ABM2O8), columbite (M1M2O6) and wodginite (M1M2M32O8). Mineral compositions of the columbite supergroup are calculated on the basis of 24 oxygen atoms per formula unit. However, the formulae of the five ixiolite to wodginite groups can be estimated by the program on the basis of their cation and anion values in their typical mineral formulae (e.g. 4 cations and 8 oxygens for the wodginite group) with normalisation procedures. The Fe3+ and Fe2+ contents from microprobe-derived total FeO (wt.%) amounts are estimated by stoichiometric constraints. WinClbclas allows users to: (1) enter up to 47 input variables for mineral compositions; (2) type and load multiple columbite-supergroup mineral compositions in the data entry section; (3) edit and load the Microsoft® Excel files used in calculating, classifying, and naming the columbite-supergroup minerals, together with the total monovalent to hexavalent ion; and (4) store all the calculated parameters in the output of a Microsoft® Excel file for further data evaluation. The program is distributed as a self-extracting setup file, including the necessary support files used by the program, a help file and representative sample data files.
  • Öge
    YER 2019 : Yerbilimlerinde Öğrenci Bitirme Tasarım Projeleri Sempozyumu ve Sergisi Bildiriler Kitabı, Maslak, İstanbul, 11 Haziran 2019
    (İTÜ Maden Fakültesi, 2019) Maden Mühendisliği ; Jeoloji Mühendisliği ; Cevher Hazırlama Mühendisliği ; Jeofizik Mühendisliği ; Kuzu, Cengiz ; Tunçdemir, Hakan ; Ocakoğlu Gökaşan, Neslihan
    YER Sempozyumları, Fakültemiz Bölümleri’nden son bir yılda mezun olan öğrenciler ile tez danışmanlarının yoğun emek harcayarak ürettikleri bitirme çalışmalarının bilim camiası ile paylaşılması amacıyla her yıl Haziran ayında düzenlenmektedir. Bu yıl da bölüm başkanlıkları ve ilgili komisyonları tarafından seçilen 29 öğrencimizin posterlerini sergilediği, 5 öğrencimizin de sunum yaparak yer bilimleri camiasıyla buluştuğu sempozyum, ayrıca sektörden katılan temsilcilerle akademik şölen mahiyetinde icra edilmiştir. Bu poster ve sunumların üretildiği tezler de dahil olmak üzere, YER2019 çerçevesinde Maden Fakültesi Bölümleri’nin bitirme tezlerinden tam metinli bildiriler üretilmiş ve bu sempozyum kitabında toplanmıştır. Oldukça kapsamlı yapılan arazi ve laboratuvar çalışmalarının yanında özgün tasarım ile çözümleme yöntemleri içeren tezler ve bunların özünü yansıtan bildirilerin sayısının fazlalığı da yapılan emek yoğun çalışmaları göstermesi bakımından önemlidir. Maden Mühendisliği Bölümü 32, Cevher Hazırlama Mühendisliği Bölümü 28, Jeofizik Mühendisliği Bölümü 14 bildiriyle ve birden fazla öğrenci grubuyla oluşturulmuş takım çalışması mahiyetindeki çalışmalarıyla Jeoloji Mühendisliği Bölümü 18 ve Petrol ve Doğal Gaz Mühendisliği Bölümü ise 5 bildiriyle sempozyuma katkı sağlamıştır.