Mineralogical and petrological features of the Cemilköy ignimbrite,Cappadocia, Turkey     

Gullu Deniz Dogan-Kulahci  Abidin Temel  Alain Gourgaud 《Chemie der Erde / Geochemistry》2018,78(1):103-115

The Cemilköy ignimbrite is one of the voluminous ignimbrite deposits in Cappadocia. The Cemilköy ignimbrite contains pumice and lithic clasts of volcanic and ophiolitic origin in an ash matrix. The unwelded Cemilköy ignimbrite is distinguished from other deposits in Cappadocia by flattened pumices, elongate vesicles and a slaty fabric. The mineral assemblage of the Cemilköy ignimbrite is plagioclase, biotite, quartz and oxides (magnetite and Ti-magnetite) and the matrix is glassy. Eutaxitic texture is dominant and all pumice clasts have a vitrophyric-porphyritic texture. The same textural properties were observed throughout the spatial distribution of Cemilköy ignimbrite. Microprobe studies reveal that plagioclase compositions range from albite through oligoclase-andesine. Estimated plagioclase-liquid temperatures (T) and pressures (P) are varying between 806 and 847?°C and 4.2–7.1 (kbar), and the H₂O content of the melt is estimated to have been 5?wt.% from the pumice clasts. Based on geochemical data, the Cemilköy ignimbrite is rhyolitic and calc-alkaline in character, and all pumice clasts are enriched in LIL and LRE elements relative to HFS elements. Negative Nb, Ta and Ti anomalies, ratios of Ba/Nb >28 (56–77), Ba/Ta ?450 (590–700) and Th/Yb vs. Ta/Yb are consistent with a subduction-related origin. According to the geochemical and mineralogical-petrographical data, the Cemilköy ignimbrite originated from partial melting of a mantle source which was enriched during previous subduction processes with variable degrees of assimilation fractional crystallization (AFC) through time and Cemilköy ignimbrite erupted from a crustal magma chamber at shallow to intermediate depth.  相似文献   

Thermal indices in Western part of Turkey     

Zahide Acar Deniz  Beyhan Ozturk 《Arabian Journal of Geosciences》2015,8(12):11193-11202

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A pipeline for the ROTSE–IIId archival data     

Bülent B. Gü?sav  Cahit Ye?ilyaprak  Sinan K. Yerli  Naz?m Aksaker  Umit K?z?lo?lu  Deniz ?oker  Elanur Dikicio?lu  Mustafa E. Ayd?n 《Experimental Astronomy》2012,33(1):197-209

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Study of the optimal aggregate blending model for quarries     

Bascetin Atac  Adiguzel Deniz  Tuylu Serkan  Baray Sukru Alp 《Environmental Earth Sciences》2016,75(19):1304

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Polycyclic aromatic and aliphatic hydrocarbons pollution at the coast of Aliağa (Turkey) ship recycling zone     

Neşer G  Kontas A  Unsalan D  Altay O  Darılmaz E  Uluturhan E  Küçüksezgin F  Tekoğul N  Yercan F 《Marine pollution bulletin》2012,64(5):1055-1059

Alia?a Bay is one of the most important maritime zones of Turkey where shipping activity, shipbreaking industry, steel works and petrochemical complexes exist together. Polycyclic aromatic hydrocarbons (PAHs) and aliphatic hydrocarbons in sediment of the Alia?a Bay were investigated to evaluate an environmental risk assessment from PAHs contamination in 2009-2010. Aliphatic and PAHs diagnostic ratios were showed to be mainly petroleum-originated and pyrolitic contaminations, respectively. The TEL/PEL analysis suggests that Alia?a sediments were likely to be contaminated by acutely toxic PAH compounds.  相似文献   

Application of Response Surface Methodology to Electrocoagulation Treatment of Hospital Wastewater          下载免费PDF全文

Sevil Veli  Ayla Arslan  Deniz Bingöl 《洁净——土壤、空气、水》2016,44(11):1516-1522

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Assessment of geo-environmental properties depressing urban development with GIS: a case study of Kozlu settlement,Turkey     

Deniz Arca  Hulya Keskin Citiroglu  Hakan S. Kutoglu  Cetin Mekik  Tomonori Deguchi 《Natural Hazards》2017,87(1):307-322

Kozlu is a mining town only 5 km away from the main city of Zonguldak and initially was not favored for settlement due to its rugged and hilly topography. However, along with hard coal production in large quantities throughout the years came the industrialization at its full speed with plenty job opportunities which then gave rise to intense population in the region where there were only a few sheds and slums just a century ago. Workers migrating to Kozlu in thousands needed dwellings to live in, but the law, so-called the Coal Basin Restrictions Law which came in effect in 1910, hindered the implementation of zoning plans. Planned housing was not possible in the region not until the abolishment of the law in 1986. During these 76 years, the settlement in the area mostly by the mining and industry workers was carried out without proper zoning plans, usually on demand basis. Today because of this unplanned housing and harsh topography, the Kozlu settlement area (KSA) has a history of being attraction point for many natural and man-made disasters which can be summarized as are topography, geological and carstic structure, mining activities and mass movements. In this study, a settlement suitability map is produced for the study area using a geographic information system. The map produced is designated into four settlement suitability zones, namely suitable to settlement, slightly suitable to settlement, suitable to settlement with precautions and unsuitable to settlement. It clearly shows that 24.73% of the study area lies in suitable and slightly suitable to settlement areas while the bulky rest pertains to suitable to settlement with precautions and unsuitable to settlement. The latest studies show that the 37.5% of the buildings and houses in the KSA are situated on the lithologic units identified as hydrogeological permeable and semipermeable, 7.8% on carstic caverns and a hefty rate of 47.6% on the surfaces deformed by mining-induced subsidence. Therefore, it is needless to claim that the administrators of Kozlu should promptly develop a settlement plan for the welfare of the city.  相似文献   

Kinematics of landslide estimated by repeated GPS measurements in the Avcilar region of Istanbul, Turkey     

Ugur Dogan  Deniz Oz  Semih Ergintav 《Studia Geophysica et Geodaetica》2013,57(2):217-232

The aim of this study is to analyze the spatial and temporal behavior of the landslide located in Avcilar region which is situated between Kucukcekmece and Buyukcekmece Lakes in the north-west of Marmara region, Turkey. A network consisting of 10 sites has been surveyed four times from November 2007 to May 2009 using Global Positioning System (GPS). The deformation analysis has been applied to determine the landslide movement parameters of the sites using GPS measurements of the four epochs. The reliable and high precision deformation rates are presented in terms of displacement vectors, velocity vectors and changes of accumulated strain. Landslides of the region are characterized from a regional GPS network. Each site has statistically different temporal behavior and significant relative motions and the region has irregular landslide movements.  相似文献   

Investigation of site properties in Adapazarı, Turkey,using microtremors and surface waves     

Ali Silahtar  Emrah Budakoğlu  Gündüz Horasan  Eray Yıldırım  H. Serdar Küyük  Evrim Yavuz  Deniz Çaka 《Environmental Earth Sciences》2016,75(20):1354

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Prediction of earthquake-induced permanent deformations for concrete-faced rockfill dams     

Durmaz  Selda  Ülgen  Deniz 《Natural Hazards》2021,105(1):587-610

Natural Hazards - Prior studies highlight the importance of earthquake-induced permanent displacement for the safety assessment of the embankment dams. Concrete-faced rockfill dams (CFRDs) have...  相似文献