Yazar "Dokuz, Abdurrahman" için listeleme
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A-type granitoids from the Eastern Pontides, NE Turkey: Records for generation of hybrid A-type rocks in a subduction-related environment
Karsli, Orhan; Caran, Semsettin; Dokuz, Abdurrahman; Coban, Hakan; Chen, Bin; Kandemir, Raif (Elsevier, 2012)The Eastern Pontides is characterized by the many of intrusive bodies formed throughout the late Mesozoic-early Cenozoic. Most of these are I-type granitoids, but here, we present for the first time an A-type pluton from ... -
Adakite-like granitoid porphyries in the Eastern Pontides, NE Turkey: Potential parental melts and geodynamic implications
Karsli, Orhan; Ketenci, Murat; Uysal, Ibrahim; Dokuz, Abdurrahman; Aydin, Faruk; Chen, Bin; Wijbrans, Jan (Elsevier Science Bv, 2011)The tectonic setting of the Eastern Pontides during the late Mesozoic to early Cenozoic remains a subject of debate. Petrogenesis of adakite-like granitoid porphyries plays a critical role in determining the nature of the ... -
Adakite-like parental melt generation by partial fusion of juvenile lower crust, Sakarya Zone, NE Turkey: A far-field response to break-off of the southern Neotethyan oceanic lithosphere
Karsli, Orhan; Dokuz, Abdurrahman; Kandemir, Raif; Aydin, Faruk; Schmitt, Axel K.; Ersoy, E. Yalcin; Alyildiz, Cihangir (Elsevier Science Bv, 2019)The timing of major tectonic events and the driving mechanisms for magma generation during Late Cenozoic convergence and collision between Arabia and Eurasia still remain unknown. The Sakarya Zone (SZ) in northern Turkey ... -
Cebre riyolili'nin (Demirözü-Bayburt) petrografik, jeokimyasal izotopik özellikleri
Külekçi, Elif (Gümüşhane Üniversitesi, 2017)Demirözü (Bayburt) civarında yüzeyleyen Cebre Riyoliti'ne ait kayaçlar petrografik, jeokimyasal ve izotopik açıdan incelendikten sonra elde edilen bulgular bu tez kapsamında petrolojik ve tektonik açıdan yorumlanmaya ... -
Cordierite-bearing strongly peraluminous Cebre Rhyolite from the eastern Sakarya Zone, NE Turkey: Constraints on the Variscan Orogeny
Dokuz, Abdurrahman; Kulekci, Elif; Aydincakir, Emre; Kandemir, Raif; Alcicek, M. Cihat; Pecha, Mark E.; Sunnetci, Kadir (Elsevier, 2017)The Cebre Rhyolite with an outcropping area up to 12 km(2) is one of the rare extrusions in the Variscan basement of the Sakarya Zone. The unit consists of high-K calc alkaline rhyolites (SiO2 = 74-82 wt.%). Abundant ... -
Çamdere ofiyolitik karışığı (Demirözü-Bayburt) içindeki bazik kayaçların jeokimyasal ve izotopik özellikleri
Ulutaş, Arzu (Gümüşhane Üniversitesi, 2017)Sakarya Zonu doğusundaki Çamdere (Bayburt) yöresi, Geç Karbonifer-Permiyen çökellerinin yüzeylediği iki lokasyondan biridir. 'Çamdere Ofiyolitik Karışığı' olarak adlandırılan tektono-sedimanter birim, bloklar halinde mermer, ... -
Demirözü (Bayburt) permo-karboniferi: Kırıntılı tortul kayaçların petrografik ve jeokimyasal incelemesi
Tunçdemir, Vahdet (Gümüşhane Üniversitesi, 2012)Bu çalışmada, Demirözü (Bayburt) yöresindeki Permo-Karbonifer yaşlı kırıntılı tortul kayaçlar petrografik ve jeokimyasal yönden incelenmişlerdir. Bilindiği üzere, kırıntılı tortul kayaçlar, orojenik kuşakların özellikle ... -
Early abyssal- and late SSZ-type vestiges of the Rheic oceanic mantle in the Variscan basement of the Sakarya Zone, NE Turkey: Implications for the sense of subduction and opening of the Paleotethys
Dokuz, Abdurrahman; Uysal, Ibrahim; Kaliwoda, Melanie; Karsli, Orhan; Ottley, Chris J.; Kandemir, Raif (Elsevier Science Bv, 2011)The boundary between the Gondwana and Laurussia, or a terrane separated from it, is traced by a suture recording the closure of the Rheic ocean in the Pulur, Beycam and Kurtoglu areas of the eastern Sakarya Zone of Turkey. ... -
Early Cambrian S-type granites in the Sakarya Zone, NE Turkey: A record for transition from subduction to post-collisional extension deduced from U-Pb zircon age and Nd-Hf isotopes
Dokuz, Abdurrahman; Aydin, Faruk; Kandemir, Raif; Karsli, Orhan; Sengun, Firat; Kristoffersen, Magnus; Santos, Jose Francisco; Hofmann, Mandy; Duygu, Levent (ELSEVIER, 2022)Cadomian realms have recently received much attention in the Alpine-Mediterranean orogenic belts, with discontinuous outcrops extending from the Alps to the Istanbul Zone, Menderes Massif, Taurides in Turkey and Iran as ... -
Early Cambrian S-type granites in the Sakarya Zone, NE Turkey: A record for transition from subduction to post-collisional extension deduced from U[sbnd]Pb zircon age and Nd[sbnd]Hf isotopes
Karsli, Orhan; Şengün, Fırat; Dokuz, Abdurrahman; Aydin, Faruk; Kandemir, Raif; Kristoffersen, Magnus; Santos, José Francisco; Hofmann, Mandy; Duygu, Levent (Elsevier B.V., 2022)Cadomian realms have recently received much attention in the Alpine–Mediterranean orogenic belts, with discontinuous outcrops extending from the Alps to the İstanbul Zone, Menderes Massif, Taurides in Turkey and Iran as ... -
Erken jura yaşlı asidik kayaçların (Olur-Erzurum) jeokimyasal ve izotopik özellikleri
Sünnetci, Kadir (Gümüşhane Üniversitesi, 2018)İnceleme konusu Erken Jura yaşlı Coşkunlar Dasiti ve Güvendik Tronjemiti Olur (Erzurum) ilçesinin 5 km kadar güneyinde yaklaşık 50 km2'lik bir alanda yüzeylemektedir. Toleyitik karaktere sahip olan kayaçlar başlıca kuvars ... -
From Cadomian back-arc basin to Rheic Ocean closure: the geochronological records of the Kurtoğlu Massif, eastern Sakarya Zone, Turkey
Gücer, Mehmet Ali; Karslı, Orhan; Yi, Keewook; Dokuz, Abdurrahman (Springer Science and Business Media Deutschland GmbH CODEN IJESF, 2022)New U–Pb zircon data from the Kurtoğlu Massif (eastern Sakarya Zone, Turkey) reveal a Cadomian back-arc basin, evolving to closure of the Rheic Ocean. A host metapsammite from the lower tectonic slice of the massif yielded ... -
Generation of the Early Cenozoic adakitic volcanism by partial melting of mafic lower crust, Eastern Turkey: Implications for crustal thickening to delamination
Karsli, Orhan; Dokuz, Abdurrahman; Uysal, Ibrahim; Aydin, Faruk; Kandemir, Raif; Wijbrans, Jan (Elsevier, 2010)Early Cenozoic (48-50 Ma) adakitic volcanic rocks from the Eastern Pontides NE Turkey consist of calc-alkaline and high-K calc-alkaline andesite and dacite, with SiO2 contents ranging from 56 01 to 65 44 wt.%.. This is the ... -
Geochemical constraints on the provenance, mineral sorting and subaerial weathering of Lower Jurassic and Upper Cretaceous clastic rocks of the eastern Pontides, Yusufeli (Artvin), NE Turkey
Dokuz, Abdurrahman; Tanyolu, Erkan (Scientific Technical Research Council Turkey-Tubitak, 2006)An integrated petrographic and geochemical study of the shales and sandstones of Early Jurassic and Late Cretaceous age in the Yusufeli area ( Turkey) was carried out to obtain more information on their provenance, ... -
Geochemical fingerprints of Late Triassic calc-alkaline lamprophyres from the Eastern Pontides, NE Turkey: A key to understanding lamprophyre formation in a subduction-related environment
Karsli, Orhan; Dokuz, Abdurrahman; Kaliwoda, Melanie; Uysal, Ibrahim; Aydin, Faruk; Kandemir, Raif; Fehr, Karl-Thomas (Elsevier Science Bv, 2014)The Eastern Pontides in NE Turkey is one of the major orogenic belts in Anatolia. In this paper, we report our new Ar-40/Ar-39 dating, mineral chemistry, major and trace elements and Sr-Nd-Pb isotopic analyses of the ... -
Geochemistry, Re-Os isotopes and highly siderophile element abundances in the Eastern Pontide peridotites (NE Turkey): Multiple episodes of melt extraction-depletion, melt-rock interaction and fertilization of the Rheic Ocean mantle
Dokuz, Abdurrahman; Uysal, Ibrahim; Dilek, Yildirim; Karsli, Orhan; Meisel, Thomas; Kandemir, Raif (Elsevier, 2015)We report on the structure, geochemistry, Re-Os isotopes and relative abundances of highly siderophile elements (HSEs) of the Paleozoic peridotite-basalt occurrences in the Eastern Pontide belt of northeastern Turkey. These ... -
Jurassic acidic magmatism in a back-arc setting, eastern Sakarya Zone, Turkey: Geochemical constraints and an evolutionary model
Dokuz, Abdurrahman; Sunnetci, Kadir (Elsevier, 2019)The Early Jurassic in the Sakarya Zone, Turkey, was dominated by basic magmatism. The products of this magmatic episode are found as basaltic lavas and pyroclastic rocks in the Senkoy Formation, which was deposited in an ... -
Kurtoğlu meta-graniti'nin (Gümüşhane) jeokimyasal ve izotopik özellikleri
Uzun, Cengiz (Gümüşhane Üniversitesi, 2019)Gümüşhane yöresi, Sakarya Zonu'na ait Variscan metamorfik temel kayaçlarının yüzeylediği lokasyonlardan biridir. Genişliği 0.5 ila 3 km ve yaklaşık 28 km uzunluğa sahip bu metamorfitler Kırıklı Köyü civarından başlayarak ... -
Late Jurassic Magmatism and Stratigraphy in the Eastern Sakarya Zone, Turkey: Evidence for the Slab Breakoff of Paleotethyan Oceanic Lithosphere
Dokuz, Abdurrahman; Aydincakir, Emre; Kandemir, Raif; Karsli, Orhan; Siebel, Wolfgang; Derman, Ahmet Sami; Turan, Mehmet (Univ Chicago Press, 2017)Middle-Late Jurassic Cimmerian events in Turkey have been actively discussed in the past three decades, but proposed tectonic models associated with magmatism, metamorphism, and stratigraphic features remain controversial. ... -
Late Jurassic Paleotethyan oceanic slab break-off revealed by Sr-Nd-Hf isotopes of Na-rich adakitic granites from northwestern Turkey
Karsli, Orhan; Şengün, Fırat; Santos, José Francisco; Uysal, İbrahim; Dokuz, Abdurrahman; Kandemir, Raif (Elsevier, 2022)The Mesozoic geodynamic evolution of the Paleotethys Ocean is critical but a poorly known piece of the geological history of the Sakarya Zone, north Turkey. Here, we describe new integrated research of zircon U-Pb ...
