Palaeozoic-Recent geological development and uplift of the Amanos Mountains (S Turkey) in the critically located northwesternmost corner of the Arabian continent

<p>We have carried out a several-year-long study of the Amanos Mountains, on the basis of which we present new sedimentary and structural evidence, which we combine with existing data, to produce the first comprehensive synthesis in the regional geological setting. The ca. N-S-trending Amanos Mountains are located at the northwesternmost edge of the Arabian plate, near the intersection of the African and Eurasian plates. Mixed siliciclastic-carbonate sediments accumulated on the north-Gondwana margin during the Palaeozoic. Triassic rift-related sedimentation was followed by platform carbonate deposition during Jurassic-Cretaceous. Late Cretaceous was characterised by platform collapse and southward emplacement of melanges and a supra-subduction zone ophiolite. Latest Cretaceous transgressive shallow-water carbonates gave way to deeper-water deposits during Palaeocene-Eocene. Eocene southward compression, reflecting initial collision, resulted in open folding, reverse faulting and duplexing. Fluvial, lagoonal and shallow-marine carbonates accumulated during Late Oligocene(?)-Early Miocene, associated with basaltic magmatism. Intensifying collision during Mid-Miocene initiated a foreland basin that then infilled with deep-water siliciclastic gravity flows. Late Miocene-Early Pliocene compression created mountain-sized folds and thrusts, verging E in the north but SE in the south. The resulting surface uplift triggered deposition of huge alluvial outwash fans in the west. Smaller alluvial fans formed along both mountain flanks during the Pleistocene after major surface uplift ended. Pliocene-Pleistocene alluvium was tilted towards the mountain front in the west. Strike-slip/transtension along the East Anatolian Transform Fault and localised sub-horizontal Quaternary basaltic volcanism in the region reflect regional transtension during Late Pliocene-Pleistocene (<4 Ma).</p

Comparisons between Tethyan Anorthosite-bearing Ophiolites and Archean Anorthosite-bearing Layered Intrusions: Implications for Archean Geodynamic Processes

Elucidating the petrogenesis and geodynamic setting(s) of anorthosites in Archean layered intrusions and Tethyan ophiolites has significant implications for crustal evolution and growth throughout Earth history. Archean anorthosite-bearing layered intrusions occur on every continent. Tethyan ophiolites occur in Europe, Africa, and Asia. In this contribution, the field, petrographic, petrological, and geochemical characteristics of 100 Tethyan anorthosite-bearing ophiolites and 155 Archean anorthosite-bearing layered intrusions are compared. Tethyan anorthosite-bearing ophiolites range from Devonian to Paleocene in age, are variably composite, contain anorthosites with highly calcic (An44-100) plagioclase and magmatic amphibole. These ophiolites formed predominantly at convergent plate margins, with some forming in mid-ocean ridge, continental rift, and mantle plume settings. The predominantly convergent plate margin tectonic setting of Tethyan anorthosite-bearing ophiolites is indicated by negative Nb and Ti anomalies and magmatic amphibole. Archean anorthosite-bearing layered intrusions are Eoarchean to Neoarchean in age, have megacrystic anorthosites with highly calcic (An20-100) plagioclase and magmatic amphibole and are interlayered with gabbros and leucogabbros and intrude pillow basalts. These Archean layered intrusions are interpreted to have predominantly formed at convergent plate margins, with the remainder forming in mantle plume, continental rift, oceanic plateau, post-orogenic, anorogenic, mid-ocean ridge, and passive continental margin settings. These layered intrusions predominantly crystallized from hydrous Ca- and Al-rich tholeiitic magmas. The field, petrographic and geochemical similarities between Archean and Tethyan anorthosites indicate that they were produced by similar geodynamic processes mainly in suprasubduction zone settings. We suggest that Archean anorthosite-bearing layered intrusions and spatially associated greenstone belts represent dismembered subduction-related Archean ophiolites

Steam-gas-drive laboratory tests for heavy-oil recovery

A comprehensive laboratory study was conducted for the recovery of heavy oil from a linear (1-D) and a three-dimensional (3-D) physical models, packed with 12.4 degrees API gravity heavy oil, 60000 ppm brine and crushed limestone. A total of 19 experiments were conducted to investigate the effects of injecting CH4 or CO2 along with steam by using these laboratory models. A linear model having a 6.6-cm diameter and 100-cm length was used for the first group of experiments. In the: second group, a 3-D model with 30-cm x 30-cm x 7.5-cm dimensions was used to obtain the process parameters. Temperature distributions in both models, steam and gas injection pressures, and fluid productions were recorded during the experiments

The residents’ perceptions towards economic, socio-cultural and environmental effects of university

*Bu çalışma, Aksaray Üniversitesi BAP koordinatörlüğü tarafından “2014-033” No’lu proje kapsamında desteklenmiş olup; 4. Ulusları Kentsel ve Çevresel Sorunlar ve Politikalar Kongresinde sunulan “Üniversitenin Kente Olan Ekonomik, Sosyo-Kültürel ve Çevresel Etkilerine Yönelik Yerel Halk Algısı” başlıklı bildirinin gözden geçirilerek genişletilmiş son halidirBu araştırmanın amacı, üniversitenin ve üniversite öğrencilerinin kente olan sosyo-ekonomik, kültürel ve çevresel etkilerine yönelik yerel halkın algısını bazı kişisel özelliklere bağlı olarak incelemektir. Bu amaçla, nicel yöntem esas alınarak, alanyazında geçerlik ve güvenirlikleri önceden sınanmış ölçeklerden yararlanılarak oluşturulan bir veri toplama aracı ile Aksaray evreninde yer alan 634 kişiden oluşan yerel halktan kolayda örnekleme yöntemine göre veri toplanmıştır. Veriler, SPSS istatistik yazılım programı yoluyla betimsel istatistiklerden, faktör analizinden, korelasyon analizinden (Pearson) ve çok değişkenli varyans analizinden (MANOVA) yararlanarak analiz edilmiştir. Elde edilen sonuçlar, yerel halkın üniversitenin ve öğrencilerin etkilerine yönelik algılarının ekonomik, sosyal-kültürel ve çevresel olmak üzere üç boyuttan oluştuğunu ve yer yer bazı olumsuz algılar da söz konusu olmakla birlikte bu algıların genel anlamda olumlu olduğunu ortaya koymuştur. Ayrıca, bu algıların cinsiyet, yaş, eğitim durumu gibi kişisel özelliklere göre farklılaşabildiği de saptanmıştır.The purpose of this research is to examine residents’ perceptions towards economic, socio-cultural and environmental effects of university and university student depending some personal characteristics. For this purpose, based on quantitative methods, the data was collected by convenience sampling method from 634 residents in Aksaray population with a tool created by use of pre-tested the validity and reliability of scales in the literature. The data were analyzed by SPSS statistical software program through the descriptive statistics, factor analysis, the correlation analysis (Pearson) and multivariate analysis of variance (MANOVA). The results exposed to residents’ perceptions towards effects of university and university student consist of three dimensions including economic, socio-cultural and environmental effects and some negative perceptions also detected but these are generally positive. In addition, it determined that these perceptions can differentiate by personal characteristics such as gender, age and education

Modeling of underground gas storage in a depleted gas field

It is possible to predict the behavior of fluids in permeable and porous medium under different operating conditions by using reservoir models. Since geological data and reservoir properties can be defined most accurately by reservoir models, it has been accepted as a reliable prediction tool among reservoir engineers. In this study, a gas reservoir has been modeled with IMEX Module of CMG Reservoir Simulator. Rock properties, gas composition and certain production data were entered to the model as input data and the measured field data were matched with simulated ones. After the 5 year depletion of the reservoir by vertical wells, the average reservoir pressure dropped from an original reservoir pressure of 2150 psi to 1200 psi. This depleted reservoir was planned to be used for gas storage purposes. The remaining gas was used as cushion gas during the conversion of this reservoir to an underground gas storage field. Afterwards, horizontal wells were defined in the model and certain production/injection scenarios were simulated for the gas storage operation

Türk medyasında Türk-Yunan ilişkileri ve Avrupalılaşma 1994-2006 = Turkish media : the relations between Turkey & Greece and Europeanization 1994-2006

Metin Türkçe ve İngilizcedir

Türkiye Büyük Millet Meclisi tutanaklarında Türk-Yunan ilişkileri ve Avrupalılaşma 1994-2006 = Relations between Turkey & Greece and Europeanization : a survey based on offical records of Turkish Grand National Assembly 1994-2006

Metin Türkçe ve İngilizcedir

A novel measure to analyze protein structures: Aspect ratio in protein alpha shapes

Proteins' three-dimensional (3D) structures are analyzed traditionally using geometric descriptors such as torsional angles and inter-atomic distances. In this study a measure that is borrowed from computational geometry, aspect ratio of each tetrahedron in alpha shapes of proteins, is utilized. This geometric descriptor differentiates alpha and beta structural classes of proteins when combined with principal components analysis. The method converts the structures of individual proteins, 3D coordinates of the atoms, to points on a plane. It has a high degree of accuracy in differentiating R and T structures of hemoglobin. Therefore, it is anticipated that the geometric measure can be used successfully in a method that is extended to solve classification problems in machine learning. © 2021 Wiley Periodicals LLC