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Öğe Ar-40-Ar-39 dating, whole-rock and Sr-Nd-Pb isotope geochemistry of post-collisional Eocene volcanic rocks in the southern part of the Eastern Pontides (NE Turkey): implications for magma evolution in extension-induced origin(SPRINGER, 2013) Arslan, Mehmet; Temizel, Irfan; Abdioglu, Emel; Kolayli, Hasan; Yucel, Cem; Boztug, Durmus; Sen, CuneytThe Eocene volcano-sedimentary units in the southern part of the Eastern Pontides (NE Turkey) are confined within a narrow zone of east-west trending, semi-isolated basins in Bayburt, GumuAYhane, Airan and Alucra areas. The volcanic rocks in these areas are mainly basalt and andesite through dacite, with a dominant calc-alkaline to rare tholeiitic tendency. Ar-40-Ar-39 dating of these volcanic rocks places them between 37.7 +/- A 0.2 and 44.5 +/- A 0.2 Ma (Middle Eocene). Differences in the major and trace element variations can be explained by the fractionation of clinopyroxene +/- A magnetite in basaltic rocks and that of hornblende + plagioclase +/- A magnetite +/- A apatite in andesitic rocks. Primitive mantle-normalized multi-element variations exhibit enrichment of large-ion lithophile elements and to a lesser extent, of light rare earth elements, as well as depletion of high field strength elements, thus revealing that volcanic rocks evolved from a parental magma derived from an enriched mantle source. Chondrite-normalized rare earth element patterns of the aforementioned volcanic rocks resemble each other and are spoon-shaped with low-to-medium enrichment (La-N/Lu-N = 2-14), indicating similar spinel lherzolitic mantle source(s). Sr, Nd and Pb isotopic systematics imply that the volcanic rocks are derived from a subduction-modified subcontinental lithospheric mantle. Furthermore, post-collisional thickened continental crust, lithospheric delamination and a subduction-imposed thermal structure are very important in generating Tertiary magma(s). The predominantly calc-alkaline nature of Eocene volcanic rocks is associated with increasing geodynamic regime-extension, whereas tholeiitic volcanism results from local variations in the stress regime of the ongoing extension and the thermal structure, as well as the thickness of the crust and the mantle-crust source regions. Based on volcanic variety and distribution, as well as on petrological data, Tertiary magmatic activity in Eastern Pontides is closely related to post-collisional thinning of the young lithosphere, which, in turn, is caused by extension and lithospheric delamination after collisional events between the Tauride-Anatolide Platform and the Eurasian Plate.Öğe Ar-40/Ar-39 age and geochemistry of the post-collisional Miocene Yamadag volcanics in the Arapkir area (Malatya Province), eastern Anatolia, Turkey(PERGAMON-ELSEVIER SCIENCE LTD, 2008) Kurum, Sevcan; Onal, Ayten; Boztug, Durmus; Spell, Terry; Arslan, MehmetThe Neogene Yamadag volcanics occupy a vast area between Sivas and Malatya in eastern Anatolia, Turkey. These volcanic rocks are characterized by pyroclastics comprising agglomerates, tuffs and some small outcrops of basaltic-andesitic-dacitic rocks, overlain upward by basaltic and dacitic rocks, and finally by basaltic lava flows in the Arapkir area, northern Malatya Province. The basaltic lava flows in the Arapkir area yield a Ar-40/Ar-39 age of 15.8 +/- 0.2 Ma, whereas the dacitic lava flows give 40Ar/39Ar ages ranging from 17.6 through 14.7 +/- 0.1 to 12.2 +/- 0.2 Ma, corresponding to the Middle Miocene. These volcanic rocks have subalkaline basaltic, basaltic andesitic; alkaline basaltic trachyandesitic and dacitic chemical compositions. Some special textures, such as spongy-cellular, sieve and embayed textures; oscillatory zoning and glass inclusions in plagioclase phenocrysts; ghost amphiboles and fresh biotite flakes are attributable to disequilibrium crystallization related to magma mixing between coeval magmas. The main solidification processes consist of fractional crystallization and magma mixing which were operative during the soldification of these volcanic rocks. The dacitic rocks are enriched in LILE, LREE and Th, U type HFSE relative to the basaltic rocks. The basaltic rocks also show some marked differences in terms of trace-element and REE geochemistry; namely, the alkaline basaltic trachyandesites have pronounced higher HFSE, MREE and HREE contents relative to the subalkaline basalts. Trace and REE geochemical data reveal the existence of three distinct magma sources - one subalkaline basaltic trachyandesitic, one alkaline basaltic and one dacitic - in the genesis of the Yamadag volcanics in the Arapkir region. The subalkaline basaltic and alkaline basaltic trachyandesitic magmas were derived from an E-MORB type enriched mantle source with a relatively high- and low-degree partial melting, respectively. The magmatic melt of dacitic rocks seem to be derived from an OIB-type enriched lithospheric mantle with a low proportion of partial melting. The enriched lithospheric mantle source reflect the metasomatism induced by earlier subduction-derived fluids. All these coeval magmas were generated in a post-collisional extensional geodynamic setting in Eastern Anatolia, Turkey. (c) 2007 Elsevier Ltd. All rights reserved.Öğe Kültür Tarihimiz Açısından Zengin Bir Kaynak: Sur-nâmeler(Bilim ve Sanat Vakfı, 2007) Arslan, MehmetSûrnâmeler, Türk Edebiyatı'na özgü orijinal bir edebi türdür. Bir nevi "düğün ve şenlik kitabı" demektir. Divan Edebiyatı şairleri, nesir yazarları ve bazı tarihçiler tarafından kaleme alınmışlardır. Bu tür eserler; padişah kızlarının evlenme düğünlerini, şehzadelerin sünnet düğünlerini, şehzade ve sultanların doğumları vesilesiyle yapılan şenlikleri anlatırlar. Manzum, mensur, nazım-nesir karışık olarak yazılırlar. Kaside ve Tarih Manzumesi şeklinde yazılanlar da vardır. Bu eserler bir düğün veya şenliğin başından sonuna kadar bütün ayrıntılarını edebi bir dille kaleme alırlar.Öğe Petrology and 40Ar-39Ar age of the bimodal Orduzu volcanics (Malatya) from the western end of the eastern Anatolian Neogene Volcanism, Turkey(2008) Önal, Ayten; Boztu?, Durmuş; Arslan, Mehmet; Spell, Terry L.; Kürüm, SevcanThe Orduzu volcanics, which are part of the Yamada? volcanics in the Malatya region, include rhyolite, rhyolitic dykes, trachyandesite and basaltic trachyandesitic dykes. Mafic globular occurrences within the basaltic trachyandesitic dykes, the existence of basaltic trachyandesite enclaves within the trachyandesite, and other textural and geochemical evidence all indicate magma mingling/mixing. Incremental 40Ar-39Ar dating on plagioclase from the rhyolite, from rhyolite dykes and basaltic trachyandesite yielded consistently 16 Ma (Middle Miocene). Primordial mantle-normalized spider diagrams of the rhyolite and rhyolitic dykes represent enrichments in some large ion lithophile elements (Cs, Rb, Ba, K, Th, U) but remarkably depletion in Sr, Nb, Ti, Eu and slight depletion in some high field strength elements (Hf, Zr) relative to the trachyandesites and basaltic trachyandesitic dykes. Chondrite-normalized rare earth element spider grams yield a high (La/Lu)CN (18-47) and Eu/Eu* (0.57-0.92) ratios for the rhyolites and rhyloitic dykes, but a low (La/Lu)CN (7-13) and Eu/Eu* (0.86-1.05) values for the trachyandesites and basaltic trachyandesitic dykes. From the field relations and geochemical data, it is concluded that three distinct magma sources were spatially and temporally involved in the genesis of the Orduzu volcanics, that include a calc-alkaline, crustal-derived rhyolitic melt, another calc-alkaline, lithospheric mantle-derived andesitic magma, and a mildly alkaline, lithospheric mantle-derived basaltic magma. Copyright © TÜBITAK.Öğe Petrology and Ar-40-Ar-39 age of the bimodal Orduzu volcanics (Malatya) from the western end of the eastern Anatolian Neogene volcanism, Turkey(SCIENTIFIC TECHNICAL RESEARCH COUNCIL TURKEY-TUBITAK, 2008) Oenal, Ayten; Boztug, Durmus; Arslan, Mehmet; Spell, Terry L.; Kueruem, SevcanThe Orduzu volcanics, which are part of the Yamadag volcanics in the Malatya region, include rhyolite, rhyolitic dykes, trachyandesite and basaltic trachyanclesitic dykes. Mafic globular occurrences within the basaltic trachyandesitic dykes, the existence of basaltic trachyandesite enclaves within the trachyandesite, and other textural and geochemical evidence all indicate magma mingling/mixing. Incremental Ar-40-Ar-39 dating on plagioclase from the rhyolite, from rhyolite dykes and basaltic trachyandesite yielded consistently 16 Ma (Middle Miocene). Primordial mantle-normalized spider diagrams of the rhyolite and rhyolitic dykes represent enrichments in some large ion lithophile elements (Cs, Rb, Ba, K, Th, U) but remarkably depletion in Sr, Nb, Ti, Eu and slight depletion in some high field strength elements (Hf, Zr) relative to the trachyandesites and basaltic trachyanclesitic dykes. Chondrite-normalized rare earth element spidergrams yield a high (La/Lu)(CN) (18-47) and Eu/Eu* (0.57-0.92) ratios for the rhyolites and rhyloitic dykes, but a low (La/Lu)(CN) (7-13) and Eu/Eu* (0.86-1.05) values for the trachyandesites and basaltic trachyandesitic dykes. From the field relations and geochemical data, it is concluded that three distinct magma sources were spatially and temporally involved in the genesis of the Orduzu volcanics, that include a calc-alkaline, crustal-derived rhyolitic melt, another calc-alkaline, lithospheric mantle-derived andesitic magma, and a mildly alkaline, lithospheric mantle-derived basaltic magma.Öğe Sami Asafname Mesnevisi (inceleme-metin)(Cumhuriyet Üniversitesi, 1987) Arslan, Mehmet; Karacan, Turgut[Abstract Not Available]Öğe Ziver Paşa divan ve münşe'at(Sivas Cumhuriyet Üniversitesi, 2009) Arslan, MehmetOsmanlnn son dönemlerinde, sönmeye yüz tutan bir mumun son parlak alevleri gibi eser veren divan şairleri arasnda Zîver Paşa'nn önemli bir yeri vardr. Ahmed Sâdk Zîver Paşa, devlette önemli görevler yüklenen bir devlet adam hüviyeti yannda devrinde, şairliği ve enteresan kişiliğiyle de kendinden söz ettiren önemli bir şahsiyettir. Memuriyet hayat boyunca irili ufakl resmi veya gayriresmî 27 kadar görev üstlenen ve büyük bir vukuf ve çal şkanlkla bütün bu görevlerinin üstesinden gelen Zîver Paşa'ya asl şöhretini kazandran ise 10478 beyitten meydana gelen ve içerisinde hemen her nazm şeklinden şiirlerin bulunduğu büyük hacimdeki divandr. Beş padişah (III. Selim, IV. Mustafa, II. Mahmud, Sultan Abdülmecid ve Sultan Abdülaziz) dönemini idrak eden fakat daha çok II. Mahmud ve Abdülmecid dönemlerinde eserlerini veren Zîver Paşa, 1793-1862 yllar arasnda yaşam ştr. Divanndaki diğer şiirlerinin yannda yazd ğ tarih manzumelerinin onun edebî hayatnda ve şöhret kazanmasnda önemli bir rolü vardr. Tespit edebildiğimiz kadaryla divan şairleri içerisinde en çok tarih manzumesi yazan şair Zîver Paşa'dr. Bu tarih manzumelerinde ki toplam says 675'tir, özellikle Osmanlnn o dönemindeki imar faaliyetlerinin bir panoramasn görmek mümkündür. O dönemdeki Osmanlnn hakim olduğu bölgelerde ("Adana, Ankara, Bağdat, Belgiradçk, Bilecik, Bursa, Çorum, Edirne, Gazze, Gemlik, Halep, Hereke, Hille, İslimye, İzmir, İzmit, İznikmîd, İzzetâbâd, Kangr (Çankr), Karaağaç, Karahisâr- Sâhip, Karatova, Kastamonu, Kavala, Kbrs, Kütahya, Manastr, Manisa, Medîne, Mekke, Msr, Rodos Adas, Safranbolu, Sakz Adas, Saraybosna, Sinop, Söğüt, Şehirköyü, Üsküp, Vidin, Viranşehir, Yanya, Ziştovi vs.) yaplan "Ambar, Barut-hâne, Câmi, Cebe-hâne, Cisr (Köprü), Çarş, Çeşme, Debbâğ-hâne, Demir-hâne, Dergâh, Dîvân-hâne, Ev, Fabrika (Muhtelif), Fes-hâne, Gümrük, Hânkâh, Hapis-hâne, Haste-hâne, Havuz, Hayrât, Kağt-hâne, Kâl-hâne, Karakol, Kasr, Kşla, Konak, Liman, Mahfil, Marangoz-hâne, Matbah, Mektep, Mevlevî-hâne, Muvakkit-hâne, Mühendis-hâne, Namazgâh, Palanka, Saat Kulesi, Sâhil-hâne, Sâhil-sarây, Sarnç, Sebîl, Su Bendi, Şadrvan, Tabya, Tahaffuz-hâne, Tekye, Tersâne, Türbe vs." binalara yazd ğ tarih manzumeleri edebî açdan olduğu kadar tarih, sosyoloji, mimarlk-mühendislik, devlet yönetimi vb. yönlerden de büyük önem taşmakta ve dönemin idari anlay şna şk tutmaktadr. Bu tarih manzumeleri sayesinde o dönemde ne gibi imar faaliyetlerinin nerelerde yapld ğ tarihin karanlk sayfalarna gömülmekten kurtulmuş, söz konusu manzumelerde bu tür eserlerin baz tantc özellikleri de verildiğinden bu manzumeler günümüze şk tutma işlevini de görmüştür.
