123 research outputs found
Crystal fractionation of adakitic magmas in the crust-mantle transition zone: Petrology, geochemistry and U-Pb zircon chronology of the Seme adakites, eastern Pontides, NE Turkey
No full textPetrochemistry and U-Pb Zircon Ages of Adakitic Intrusions from the Pulur Massif (Eastern Pontides, NE Turkey): Implications for Slab Rollback and Ridge Subduction Associated with Cenozoic Convergent Tectonics in the Eastern Mediterranean
No full textPetrology, Geochronology and Tectonic Setting of Early Triassic Alkaline Metagabbros From the Eastern Pontide Orogenic Belt (NE Turkey): Implications for the Geodynamic Evolution of Gondwana's Early Mesozoic Northern Margin
Full text linkThe Triassic geodynamic evolution of the Pontides Belt, which geographically corresponds to northern Anatolia, is still a matter of debate. We present and interpret geological, petrographical, geochemical, and geochronological data from small, discordant, metagabbroic rocks exposed in the Tokat Massif. Field and petrographic characteristics distinguish four subgroups: (i) medium-grained, slightly lineated, clinopyroxene-rich metagabbros; (ii) fine-grained, nonlineated, clinopyroxene-rich metagabbros; (iii) medium-grained, nonlineated, brown amphibole-rich metagabbros; and (iv) medium-grained, slightly lineated, brown and blue amphibole-rich metagabbros. Magmatic kaersutites give Ar-39/Ar-40 plateau ages of 244.60.5 and 243.160.92Ma and overlap the U-Pb age of titanite from a clinopyroxene-rich sample. Inherited zircons (similar to 460, similar to 880, and similar to 2600Ma) in fine-grained clinopyroxene-rich metagabbros indicate interaction with a range of crustal rocks during the intrusion. The blue amphiboles are magnesioriebeckites that formed during metamorphism or late-stage crystallization. Geochemical data, including whole rock major and trace element concentrations, and Sr-Nd-Pb isotope compositions reveal that both clinopyroxene- and amphibole-rich metagabbros are alkaline in composition but derived from distinct mantle sources. They are compositionally distinct from mafic igneous rocks in the contemporaneous Permo-Triassic Karakaya Complex that is well exposed in the western part of the Pontides Belt. Considering all data, we suggest that the Pontides Belt was shaped above a south dipping subduction zone during Permo-Triassic and the alkaline gabbros that were emplaced into crustal rocks during Early Triassic back-arc rifting of the northern margin of Gondwana.PublishedYe
Late Triassic subduction-related ultramafic–mafic magmatism in the Amasya region (eastern Pontides, N. Turkey): Implications for the ophiolite conundrum in Eastern Mediterranean
No full textMigrating magmatism in a continental arc: Geodynamics of the Eastern Mediterranean revisited
No full textTransition from shoshonitic to adakitic magmatism in the eastern Pontides, NE Turkey: Implications for slab window melting
No full textA study on the works of Mavisel Yener as a child literature author
No full textÇocuk kitapları yazarı olarak tanınan, çocuklara okumayı sevdirmek amacında olan bir yazar olarak karşımıza çıkan Mavisel Yener'in mizaha yatkınlığı ve konuyu çocuk gözüyle aktarımı hemen her kitabında göze çarpmaktadır. Mavisel Yener'in çocuk diliyle yazdığı öyküler, çocukların dünyaya gülümseyerek ve hoşgörü ile bakmalarına yardımcı olabilecek, onlara okumayı ve kitabı sevdirebilecek türdendir._x000B_Çocukları eğlendirmenin yanı sıra, olayları ince alaylarla süsleyerek onlara satır aralarında çok şeyler fısıldayan öyküleri; felsefe, tarih, coğrafya gibi didaktik öğeleri kuru bir bilgi olmaktan çıkarıp olaylar ve kahramanlar vasıtasıyla okuyucuya vermiştir._x000B_Eserlerinde kullandığı güçlü gözlemler sayesinde okuyucu okuduklarını göz önünde canlandırmakta, sözcüklerle resim yapmakta zorlanmamaktadır. Öyküler fantastik veya sürrealist değil, realisttir. Tüm gözlem gücünü kullanıp yeni karakterler oluşturmuş veya zaten var olan karakterlerle öykülerini kurgulamıştır. Öykülerin çizimleri gülmece türüne uygun olması açısından karikatür tiplemelerine benzetilmiştir._x000B_Çocuk kitaplarının başarısı, sadece çocuklar değil, yetişkinler tarafından da beğenilerek okunmasıyla kendini gösterir. Mavisel Yener'in kitapları hem çocukların hem de yetişkinlerin severek okuyacakları türdendir._x000B_Dili ve kurguyu iyi kullanmaya büyük önem veren Mavisel Yener, roman ve hikayelerinde, gençlere merak ve heyecanla okuyacakları maceralar sunmuştur. Okuyucunun merak etmesi ve araştırma yapması amaçlanmıştır._x000B_Okuru peşinden sürükleyerek gizemli bir yolculuğa çıkaran Yener, çocuk gözüyle yaşama dokunmayı, yaşamı sorgulamayı başarmıştır. Çocuk yazınında son derece önemsenen çocuklarda, metinler aracılığıyla insana, doğaya ve hayvanlara karşı duyarlılık ve sevgi oluşturmak gibi öğeler eserlerinde önemle üzerinde durduğu temalar olmuştur. Mavisel Yener?s familiarity to humour and transmission of the topic with the eye of a child attracts the attention in her each book, who is known as an author of juvenile books and aims to make children love reading. The stories Mavisel Yener writes with child language are of a kind that will help children look at the world smiling and tolerant and make them love reading and books._x000B_Besides entertaining the author transfers the stories, which whispers a lot between lines, with ironies that frees the elements such as philosophy, history, geography from being sole information via events and heroes._x000B_With the help of strong observations she used in her works the reader imagines what is written, she does not have any difficulty in painting with words. The stories are not fantastic or surrealist but realistic. She created new characters using all her observation potential or edit her stories with already existing ones. Drawings of the stories are just like caricature in order to fit in comedy._x000B_Success of children?s books are put out, being read and liked by adults too, not only children. Mavisel Yener?s books are of a kind that both children and adults read with passion._x000B_Mavisel Yener who cares using language and fiction properly, presents adventures to youth that they can read with curiosity and excitement in her novels and stories. The aim is to intrigue the reader and make him/her do some research._x000B_ Yener who takes the reader to a mysterious journey has achieved to touch and question the life with the eye of a child. The elements such as generating sensitivity and love to human beings, nature and animals in children through texts which are given utmost importance in children?s literature have been the themes Yener strongly gave point in her work
Petrogenesis and U-Pb zircon chronology of adakitic porphyries within the Kop ultramafic massif (eastern Pontides orogenic belt, NE Turkey)
No full textAbstract not availableYener Eyuboglu, Francis O. Dudas, M. Santosh, Keewook Yi, Sanghoon Kwon, Enver Akaryal
The Eastern Black Sea-type volcanogenic massive sulfide deposits: geochemistry, zircon U-Pb geochronology and an overview of the geodynamics of ore genesis
No full textAbstract not availableYener Eyuboglu, M. Santosh, Keewook Yi, Necati Tuysuz, Sadettin Korkmaz, Enver Akaryali, Francis O. Dudas, Osman Bekta
Where are the remnants of a Jurassic ocean in the eastern Mediterranean region?
No full textAbstract not availableYener Eyuboglu, Francis O. Dudas, M. Santosh, Yilin Xiao, Keewook Yi, Nilanjan Chatterjee, Fu-Yuan Wu, Osman Bekta
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