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dc.contributor.authorEyuboglu, Yener
dc.contributor.authorDilek, Yildirim
dc.contributor.authorBozkurt, Erdin
dc.contributor.authorBektas, Osman
dc.contributor.authorRojay, Bora
dc.contributor.authorSen, Cuneyt
dc.date.accessioned2021-11-09T19:49:41Z
dc.date.available2021-11-09T19:49:41Z
dc.date.issued2010
dc.identifier.issn1342-937X
dc.identifier.issn1878-0571
dc.identifier.urihttps://doi.org/10.1016/j.gr.2010.01.008
dc.identifier.urihttps://hdl.handle.net/20.500.12440/4102
dc.description.abstractThe Karayasmak ultramafic-mafic association (KUMA) in NE Turkey represents an Alaskan-type, pre-Liassic intrusion in the Pulur metamorphic massif and is one of many such intrusive complexes that were emplaced into the continental basement of the Eastern Pontides belt during the pre-Liassic. Its main lithological units include plagioclase peridotite, melagabbronorite, banded gabbro and anorthosite (Phase-I), gabbro-pegmatite dikes (Phase-II), unmetamorphosed banded gabbro (Phase-III), cumulate olivine gabbronorite (Phase-IV), and non-cumulate gabbroic dikes and stocks (Phase-V). The contact relations between these units are gradational or intrusive, with the peridotites (Phase-I) enveloping the cumulate gabbronorites (Phase-IV) in the center of the elliptical body, displaying a concentric reverse-zoning pattern. Cr-Al spinel. plagioclase, and olivine are the first crystallizing phases in all cumulate rocks, whereas pyroxene, hornblende, phlogopite, magnetite, and ilmenite represent the intercumulus phases. The existence of hornblende and phlogopite, the high Wo and Cr2O3 contents of clinopyroxene, and the high Fo and NiO contents of olivine indicate that the KUMA units were the near-liquidus fractional crystallization products of hydrous basaltic magma. The Phase-I and Phase-III cumulates are slightly enriched in LILE and LREE, depleted in HFSE and HREE with respect to chondrite and primitive mantle, and show negative Nb, Zr, Hf and Ti anomalies. The Phase-IV cumulate gabbronorites are even more enriched in LILE and LREE and show less depletion in HFSE and HREE in comparison to the earlier phases. The KUMA units formed from high-Al hydrous basaltic magmas, which were derived from partial melting of a previously subduction-metasomatized subcontinental-lithospheric mantle. These magmas underwent crystal fractionation and mineral concentration processes in small magma chamber(s) at shallow crustal levels (<5 kbar). (c) 2010 International Association for Gondwana Research. Published by 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) [105Y066]; Karadeniz Technical UniversityKaradeniz Technical University [2006.118.01.1]en_US
dc.description.sponsorshipWe gratefully acknowledge the research grants from The Scientific and Technological Research Council of Turkey (TUBITAK-Grant 105Y066) and Karadeniz Technical University Research Fund (Grant 2006.118.01.1). We would like to thank John A. Winchester (England) and Yakov Kapusta (Canada) for insightful discussions on data analysis. Particular thanks are due to Dr. Frank Dudas (MIT-USA) for his help with the interpretation of our isotope data. Constructive and thorough reviews by S. Arai and P.T. Robinson have helped us improve the paper. We thank Chief-Editor M. Santosh for his invitation of this contribution to the Miyashiro special issue and for his editorial handling.en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.ispartofGondwana Researchen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAlaskan-typeen_US
dc.subjectEastern Pontidesen_US
dc.subjectCumulateen_US
dc.subjectHydrous magmaen_US
dc.subjectLithospheric mantleen_US
dc.subjectTectonicsen_US
dc.titleStructure and geochemistry of an Alaskan-type ultramafic-mafic complex in the Eastern Pontides, NE Turkeyen_US
dc.typearticleen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.description.wospublicationidWOS:000278981800016en_US
dc.description.scopuspublicationid2-s2.0-77952430049en_US
dc.departmentGümüşhane Üniversitesien_US
dc.authoridDilek, Yildirim / 0000-0003-2387-9575
dc.authoridRojay, Bora / 0000-0001-9854-6340
dc.authoridBozkurt, Erdin / 0000-0003-0592-6438
dc.identifier.volume18en_US
dc.identifier.issue1en_US
dc.identifier.startpage230en_US
dc.identifier.doi10.1016/j.gr.2010.01.008
dc.identifier.endpage252en_US
dc.authorwosidDilek, Yildirim / S-9768-2019
dc.authorwosidSen, Cuneyt / AAH-8315-2020
dc.authorwosidEyuboglu, Yener / AAN-3805-2021
dc.authorwosidRojay, Bora / ABA-7032-2020
dc.authorwosidBozkurt, Erdin / A-9332-2018
dc.authorscopusid15074009800
dc.authorscopusid7003520996
dc.authorscopusid7003971977
dc.authorscopusid6506070008
dc.authorscopusid6507288631
dc.authorscopusid57211129364


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