Basit öğe kaydını göster

dc.contributor.authorDokuz, Abdurrahman
dc.contributor.authorKulekçi, Elif
dc.contributor.authorAydınçakır, Emre
dc.contributor.authorKandemir, Raif
dc.contributor.authorAlçiçek, M. Cihat
dc.contributor.authorPecha, Mark E.
dc.contributor.authorSünnetçi, Kadir
dc.date.accessioned2020-12-19T19:48:40Z
dc.date.available2020-12-19T19:48:40Z
dc.date.issued2017
dc.identifier.citationDokuz, A., Kulekci, E., Aydınçakır, E., Kandemir, R., Alç,çek, M.C., Pecha, M.E. & Sünnetçi, K. (2017). Cordierite-bearing strongly peraluminous Cebre Rhyolite from the eastern Sakarya Zone, NE Turkey: Constraints on the Variscan Orogeny. Lithos, 278, 285-302. https://doi.org/10.1016/j.lithos.2017.02.002en_US
dc.identifier.issn0024-4937
dc.identifier.issn1872-6143
dc.identifier.urihttps://doi.org/10.1016/j.lithos.2017.02.002
dc.identifier.urihttps://hdl.handle.net/11436/2139
dc.descriptionAlcicek, Mehmet Cihat/0000-0001-7689-7625; KANDEMIR, RAIF/0000-0002-0344-9159en_US
dc.descriptionWOS: 000399258500020en_US
dc.description.abstractThe 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 phenocrysts of quartz and K-feldspar are accompanied by subordinate cordierite phenocrysts, rare muscovite microphenocrysts and biotite microcrysts set in a fine-grained groundmass. Three types of rock fragments (xenoliths) have been recognized; (i) porphyritic, (ii) equigranular hypabyssal and (iii) hypocrystalline fragments. Zircon U-Pb dating indicates that the Cebre Rhyolite was extruded at 332.8 +/- 4.38 Ma, which post-dates the Variscan low temperature metamorphism and pre-dates the emplacement of I-type granitic intrusions (325-303 Ma).The samples are strongly peraluminous with A/CNK values ranging from 1.48 to 2.95 and A/NK from 1.49 to 2.99. They have very high K2O (3.72-7.42 wt.%) and Al2O3 (10.77-14.11 wt.%) contents, but very low CaO (0.02-0.21 wt.%), Na2O (0.05-0.78 wt.%) and MgO (0.3-0.21 wt.%) contents. the samples show geochemical affinity with the upper continental crust, e.g., enrichment of large ion lithophile elements (LILEs; K, Rb, U, Th, Pb), depletion of high field strength elements (HFSEs; Nb, Ta, Ti), Sr, P and Eu, but epsilon Nd-(t) values (- 3.06 to - 8.75) and isotope ratios of Sr-(t)((87) Sr/Sr-86 = 0.70499-0.70915) and Pb-(t) (Pb-206/Pb-204 = 16.41-17.570, Pb-207/Pb-204 = 15.54-15.59, Pb-208/Pb-204 = 36.20-37.22) are similar to those of the lower crust. Geochemical and isotope data indicate that the Cebre Rhyolite was generated by melting of metapelitic rocks with some addition of intermediate metaigneous derived magma. As a geodynamic model, we propose that the Variscan Orogeny in Turkey was occurred by collision of Gondwana with an arc/terrane separated from the southern margin of Laurussia. This collision was followed shortly after by splitting of oceanic lithosphere into two pieces and sinking down into asthenosphere. Rapid upwelling of asthenosphere to space emptied by previous oceanic lithosphere provided heat for high temperature metamorphism and anatexis of metasedimentary rocks in the crust. (C) 2017 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [113Y457]; Gumushane Universitesi BAB [13.F5114.02.6]en_US
dc.description.sponsorshipThis work was financially supported by research grants from the Scientific and Technological Research Council of Turkey (TUBITAK; project no: 113Y457) and Gumushane Universitesi BAB (Project no: 13.F5114.02.6). We are greatful to Bernard Bonin and an anonymous referee for detailed reviews, which helped us to considerably improve the manuscript. Sun-Lin Chung is thanked for his editorial handling. Authors thank Frank C. Ramos for help with the Sr-Nd-Pb isotope analyses. Vandet Tunglemir is also thanked for his discussions and logistical support.en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectRhyoliteen_US
dc.subjectS-typeen_US
dc.subjectCordieriteen_US
dc.subjectVariscan basementen_US
dc.subjectArc-Gondwana collisionen_US
dc.subjectNE Turkeyen_US
dc.titleCordierite-bearing strongly peraluminous cebre rhyolite from the eastern Sakarya Zone, NE Turkey: Constraints on the variscan orogenyen_US
dc.typearticleen_US
dc.contributor.departmentRTEÜ, Mühendislik ve Mimarlık Fakültesi, Jeoloji Mühendisliği Bölümüen_US
dc.contributor.institutionauthorKandemir, Raif
dc.identifier.doi10.1016/j.lithos.2017.02.002
dc.identifier.volume278en_US
dc.identifier.startpage285en_US
dc.identifier.endpage302en_US
dc.relation.journalLithosen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US


Bu öğenin dosyaları:

Thumbnail

Bu öğe aşağıdaki koleksiyon(lar)da görünmektedir.

Basit öğe kaydını göster