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dc.contributor.authorLEBEDEV, Vladimir A.
dc.contributor.authorSHARKOV, Evgenii V.
dc.contributor.authorCHUGAEV, Andrey V.
dc.contributor.authorOyan, Vural
dc.contributor.authorKeskin, MEHMET
dc.contributor.authorÜnal, Esin
dc.date.accessioned2021-03-06T20:10:39Z
dc.date.available2021-03-06T20:10:39Z
dc.date.issued2017
dc.identifier.citationOyan V., Keskin M., LEBEDEV V. A. , CHUGAEV A. V. , SHARKOV E. V. , Ünal E., "Petrology and Geochemistry of the Quaternary Mafic Volcanism to the NE of Lake Van, Eastern Anatolian Collision Zone, Turkey", JOURNAL OF PETROLOGY, cilt.58, ss.1701-1728, 2017
dc.identifier.issn0022-3530
dc.identifier.othervv_1032021
dc.identifier.otherav_f91e3f8f-33b5-406f-8da9-d72b27a3f768
dc.identifier.urihttp://hdl.handle.net/20.500.12627/163161
dc.identifier.urihttps://doi.org/10.1093/petrology/egx070
dc.description.abstractCollision-related Quaternary mafic volcanism to the north of Lake Van (Eastern Anatolia, Turkey) occurred by eruptions from both volcanic centres and extensional fissures trending approximately north-south. We report new major, trace and rare earth element abundances, Sr-Nd-Pb isotope ratios and K-Ar ages for basaltic and more evolved hawaiitic and mugearitic lava flows. The new K-Ar ages indicate that magmatic activity occurred between 1.0 and 0.4 Ma. The volcanic products consist of mildly alkaline lavas, ranging in composition from basalt to hawaiite and mugearite. Energy-constrained assimilation and fractional crystallization (EC-AFC) model calculations suggest that the least evolved basaltic samples were unaffected by the combined effects of fractional crystallization and crustal contamination processes, in contrast to the more evolved hawaiitic and mugearitic lavas, which have experienced up to 2-3% crustal assimilation. Calculations based on crustal temperatures and Curie point depths indicate that the magma chamber, from which the basic to evolved lavas were derived, might be located at a depth of around 6-8 km, within the upper crust. Enrichment of large ion lithophile elements and light rare earth elements relative to high strength field elements, and higher Sr-87/Sr-86 and Pb isotopic ratios and lower Nd-144/Nd-143 of the least evolved basaltic samples indicate that the mantle source region of the Quaternary mafic magmas might have been enriched by melts that were derived from subducted sediments with a partial melting degree of around 10% rather than from Altered Oceanic Crust melts and fluids. Our model melting calculations show that the basaltic melts might have been produced by melting of a mantle source containing both amphibole and garnet with a partial melting degree of similar to 3%. Results of our petrological models indicate that a metasomatized mantle source, which was infiltrated by a mixture of 93% mantle melt and 7% sediment melt plus 0.01% residual rutile, added to mantle melt, could have been the source composition of the basaltic melts that produced the Quaternary mafic volcanism.
dc.language.isoeng
dc.subjectMühendislik ve Teknoloji
dc.subjectJEOKİMYA VE JEOFİZİK
dc.subjectYerbilimleri
dc.subjectTemel Bilimler (SCI)
dc.subjectJeofizik Mühendisliği
dc.titlePetrology and Geochemistry of the Quaternary Mafic Volcanism to the NE of Lake Van, Eastern Anatolian Collision Zone, Turkey
dc.typeMakale
dc.relation.journalJOURNAL OF PETROLOGY
dc.contributor.departmentVan Yüzüncü Yıl Üniversitesi , Mühendislik Mimarlık Fakültesi , Maden Mühendisliği Bölümü
dc.identifier.volume58
dc.identifier.issue9
dc.identifier.startpage1701
dc.identifier.endpage1728
dc.contributor.firstauthorID32336


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