Browsing by Author "Kandemir, Raif"
Now showing items 1-20 of 29
-
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 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 ... -
Analysis of ionospheric TEC anomalies for global earthquakes during 2000-2019 with respect to earthquake magnitude (Mw >= 6.0)
Ulukavak, Mustafa; Yalcinkaya, Mualla; Kayikci, Emine Tanir; Öztürk, Serkan; Kandemir, Raif; Karsli, Hakan (Pergamon-Elsevier Science Ltd, 2020)In this work, a relationship between ionospheric TEC anomalies and different earthquake magnitude groups before the main shocks was investigated. For this purpose, 2942 global earthquakes with Mw >= 6 from 2000 to 2019 and ... -
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 ... -
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 ... -
Eski Gümüşhane yöresinin jeolojisi ve Şenköy formasyonu (Erken-Orta Jura) içerisindeki kumtaşlarının petrografik ve jeokimyasal incelemesi
Duygu, Levent (Gümüşhane Üniversitesi, 2011)Çalışma, Eski Gümüşhane yöresini içerisine alan Trabzon H42-b2 paftasının jeolojik incelemesi ve Erken-Orta Jura yaşlı Şenköy formasyonu içerisindeki kumtaşlarının petrografik ve jeokimyasal özellikleri belirlenmesinden ... -
First report of a trilobite in the carboniferous of eastern pontides, NE Turkey
Kandemir, Raif; Lerosey, Rudy Aubrıl (2011)Doğu Pontidler’in Mesozoyik öncesi temelini oluşturan Permo?Karbonifer yaşlı çökel kayaları Çatalçeşme ve Hardişi formasyonlarından oluşur. Çatalçeşme Formasyonu fusulinidler, mercanlar, gastropodlar, brakyopodlar, bryozoalar, ... -
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 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 ... -
Investigation of the Relationship among Fault Types, Focal Depths, and Ionospheric TEC Anomalies before Large Earthquakes between 2000 and 2020
Ulukavak, Mustafa; Yalcinkaya, Mualla; Kayikci, Emine Tanir; Öztürk, Serkan; Kandemir, Raif; Karslı, Hakan (ASCE-AMER SOC CIVIL ENGINEERS, 2022)In this study, the relationships between possible ionospheric total electron content (TEC) anomalies and earthquake focal depths and fault types were investigated using 3,099 global earthquakes with Mw >= 6.0 between 2000 ... -
Investigation of the Relationship among Fault Types, Focal Depths, and Ionospheric TEC Anomalies before Large Earthquakes between 2000 and 2020
Ulukavak, Mustafa; Yalçlnkaya, Mualla; Kaylkçl, Emine Tanlr; Kandemir, Raif; Karsll, Hakan; Öztürk, Serkan (American Society of Civil Engineers (ASCE), 2022)In this study, the relationships between possible ionospheric total electron content (TEC) anomalies and earthquake focal depths and fault types were investigated using 3,099 global earthquakes with Mw≥6.0 between 2000 and ... -
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 ... -
Latest Cretaceous A(2)-type granites in the Sakarya Zone, NE Turkey: Partial melting of mafic lower crust in response to roll-back of Neo-Tethyan oceanic lithosphere
Karsli, Orhan; Aydin, Faruk; Uysal, Ibrahim; Dokuz, Abdurrahman; Kumral, Mustafa; Kandemir, Raif; Ketenci, Murat (Elsevier Science Bv, 2018)An integrated study of comprehensive geochronological, geochemical, and Sr-Nd-Hf isotopic data was undertaken for the A-type Topcam pluton that intruded within the Sakarya Zone (NE Turkey) with the aims of elucidating its ... -
Lithostratigraphy, facies, and deposition environment of the lower Jurassic Ammonitico Rosso type sediments (ARTS) in the Gumushane area, NE Turkey: Implications for the opening of the northern branch of the Neo-Tethys Ocean
Kandemir, Raif; Yilmaz, Cemil (Pergamon-Elsevier Science Ltd, 2009)Ammonitico Rosso type sediments (ARTS) form the bottom level of the Senkoy Formation in the Gumushane area. The formation accumulated in the rift-related basins triggered by extensional tectonic regimes in the Early Jurassic ... -
Nature of the Early Cretaceous lamprophyre and high-Nb basaltic dykes, NE Turkey: Constraints on their linkage to subduction initiation of Neotethyan oceanic lithosphere
Karsli, Orhan; Ilhan, Mehdi; Kandemir, Raif; Dokuz, Abdurrahman; Aydin, Faruk; Uysal, Ibrahim; Duygu, Levent (Elsevier, 2021)Late Mesozoic evolution of the Neotethys Ocean is critical and still remains unclear along the entire Sakarya Zone (SZ), Turkey, because previous interpretations of the Middle to Late Jurassic rifting of the SZ have not ... -
A new Early Jurassic brachiopod fauna from the Eastern Pontides (Turkey)
Voeroes, Attila; Kandemir, Raif (E Schweizerbartsche Verlags, 2011)A newly collected Early Jurassic brachiopod fauna from the Kocamantasi section (Gumushane region, Eastern Pontides, Turkey) yielded 160 specimens and 13 species (4 rhynchonellids, 3 spiriferinids, 6 terebratulids). Apart ...
