Early activity of the largest Cenozoic shield volcano in the circum-Mediterranean area: Mt. Karacadag, SE Turkey

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dc.contributor.authorLustrino, Michele
dc.contributor.authorKeskin, Mehmet
dc.contributor.authorMattioli, Michele
dc.contributor.authorLebedev, Vladimir A.
dc.contributor.authorChugaev, Andrey
dc.contributor.authorSharkov, Evgenii
dc.contributor.authorKavak, Orhan
dc.date.accessioned2024-04-24T17:11:52Z
dc.date.available2024-04-24T17:11:52Z
dc.date.issued2010
dc.departmentDicle Üniversitesien_US
dc.description.abstractVolcanic activity at Mt. Karacadag, SE Turkey, developed between similar to 11 and similar to 0.01 Ma. In this paper we investigate the oldest products (older than 2.6 Ma) that created a large volcanic plateau and a N-S aligned volcanic edifice in the form of a shield volcano. These igneous rocks are mildly alkaline to transitional olivine-clinopyroxene phyric basalts with minor hawaiites, basanites and very rare differentiated lithologies (mugearites and benmoreites). The poor correlation of major elements with MgO in these lavas is qualitatively consistent with polybaric depths of magma production, variable degrees of partial melting (from similar to 2 to similar to 10 %), heterogeneous mantle sources and differences in the fractionating crystal assemblage. Primitive mantle-normalized patterns resemble typical anorogenic magma compositions, with peaks at HFSE (Nb, Ta, Hf, Zr) and high HFSE/LILE ratios. REE contents are compatible with derivation of the basanites from a mixed garnet-spinel facies peridotite after similar to 2% partial melting. Alkali basalts are compatible with higher degrees of melting (between 5 and 10 %) from the same type of source. Initial Sr-87/Sr-86 ratios range from 0.70349 to 0.70522 while those of Nd-143/Nd-144 range from 0.512853 to 0.512659. Early-stage lavas show higher Sr-87/Sr-86 and lower Nd-143/Nd-144 compared to plateau-stage lavas. The Sr-Nd isotopic variations and their relation with major and trace elements cannot be explained by AFC-like (Assimilation and Fractional Crystallization) processes involving average crustal lithologies. More likely, the Sr-Nd isotopic ratios are related to the existence of heterogeneous mantle sources with only minor involvement of AFC-like processes. The Cenozoic lavas in a 200 x 800 km area between the Karasu Valley and the Syria-Iraq-Turkey border in south-eastern Anatolia form a distinct igneous province which can be characterised on the basis of Sr-isotope signatures. The lithospheric mantle beneath this area is characterized by anomalously enriched Sr-87/Sr-86 compositions (up to 0.7055) as well as more isotopically depleted compositions (Sr-87/Sr-86 down to 0.7030).en_US
dc.description.sponsorshipIstanbul University [ACIP-1282]; RFBR-TUBITAK [09-05-91220-CT, 108Y222]; University La Sapienza [AST 2008, 2009]; PRIN [2008HMHYFP_005]en_US
dc.description.sponsorshipThe first author warmly thanks Raffaello Trigila (Rome) for designing and assembling the equipment to produce the glassy beads and for his continued assistance during the production of the data. Marcello Serracino is thanked for his usual skilled help during electron micro-probe work. The manuscript was significantly improved after a detailed review by Gianluca Bianchini (London) and an anonymous reviewer. Additional comments from the Associate Editor (Cliff Shaw) and the Chief Editor (Sandro Conticelli) are appreciated. Gillian Foulger (Durham, UK) kindly helped us in the proofreading the manuscript. ML thanks, as usual, Enrica, Bianca and Laura for their support to the project and the late Israel IZ Kamakawiwoole, now somewhere over the rainbow. We thank the local people for their warm welcome during the fieldwork. MK thanks the Istanbul University Research Fund (project # ACIP-1282) for their support during the fieldwork. This work was partly supported by a RFBR-TUBITAK joint project (RFBR project # 09-05-91220-CT and TUBITAK project # 108Y222), by research grants from University La Sapienza (AST 2008, 2009) and from PRIN 2008 (research grant#: 2008HMHYFP_005).en_US
dc.identifier.doi10.1127/0935-1221/2010/0022-2024
dc.identifier.endpage362en_US
dc.identifier.issn0935-1221
dc.identifier.issn1617-4011
dc.identifier.issue3en_US
dc.identifier.scopus2-s2.0-77954810764
dc.identifier.scopusqualityQ3
dc.identifier.startpage343en_US
dc.identifier.urihttps://doi.org/10.1127/0935-1221/2010/0022-2024
dc.identifier.urihttps://hdl.handle.net/11468/17755
dc.identifier.volume22en_US
dc.identifier.wosWOS:000278166000003
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoenen_US
dc.publisherCopernicus Gesellschaft Mbhen_US
dc.relation.ispartofEuropean Journal of Mineralogy
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectTurkeyen_US
dc.subjectAnatoliaen_US
dc.subjectBasalten_US
dc.subjectIgneous Petrologyen_US
dc.subjectIsotope Geochemistryen_US
dc.subjectK/Ar Datingen_US
dc.titleEarly activity of the largest Cenozoic shield volcano in the circum-Mediterranean area: Mt. Karacadag, SE Turkeyen_US
dc.titleEarly activity of the largest Cenozoic shield volcano in the circum-Mediterranean area: Mt. Karacadag, SE Turkey
dc.typeArticleen_US

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