Rare earth element (REE) geochemistry and genetic implications of the Mortas bauxite deposit (Seydisehir/Konya - Southern Turkey)

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dc.contributor.authorKaradag, M. Muzaffer
dc.contributor.authorKupeli, Suayip
dc.contributor.authorAryk, Fetullah
dc.contributor.authorAyhan, Ahmet
dc.contributor.authorZedef, Veysel
dc.contributor.authorDoyen, Adnan
dc.date.accessioned2020-03-26T17:39:54Z
dc.date.available2020-03-26T17:39:54Z
dc.date.issued2009
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractThe Mediterranean-type karst-bauxite deposit of Mortas, South Turkey, placed unconformably between Cenomanian and Senonian shallow marine limestones is built of massive (MB), oolithic (OB), breccia-bearing (BB) and earthy (EB) bauxite horizons, from top to bottom. The MB layer is enriched in Al and REE (except Cc) due to loss of Si, Na, K, Mg and P. REE are accumulated in the BB but depleted in the EB layers. The ferruginous OB lost LREE and gained in HREE probable due to scavenging by authigenic heavy minerals like rutile, anatase and titanite. Total REE contents in the bauxite profile display an increasing trend from bottom to top, while negative and maximum positive Ce anomalies characterize the upper and the lower parts of the profile, respectively. This unusual REE behavior is explicable by assuming mobilization of Ce(W) either under reducing condition or chemical complexation under alkaline conditions in the top layer and scavenging of Cc by Al-Mg hydrosilicates and Ti-oxides and/or precipitation with authigenic REE minerals, especially of the bastnasite group near the bedrock limestones. Similarity in chondrite normalized-REE patterns of the Seydisehir phyllites, bauxite and terra rossa samples and the presence of tridymite (?) in bauxites makes a felsic source rock most likely and reveal a close genetic relationship between the Seydisehir phyllites and the recent terra rossa occurrences. The REE patterns of the bauxites resemble those of the Katrangedigi limestone despite variations in Sigma REE. Field observations and geochemical data together with mass-balance calculations suggest that the Mortas deposit was derived from the Seydisehir phyllites and argillic phase within the Katrangedigi limestone which in turn have Precambrian (?) felsic, probably granitic precursors. (c) 2008 Elsevier GmbH. All rights reserved.en_US
dc.description.sponsorshipSelcuk University in KonyaSelcuk University [2003/125]en_US
dc.description.sponsorshipThis work is a part of the project supported by the Scientific Research Project Division (BAP, 2003/125) of the Selcuk University in Konya. We thank P. Moller (GeoForschungszentrum, Potsdam, Germany), M.B. Sadiklar (Karadeniz Technical University, Trabzon, Turkey), H. Orhan (Selcuk University, Konya, Turkey), A. Gokce (Cumhuriyet University, Sivas, Turkey), I.T. Uysal (The University of Queensland, Australia) and R. Harding (Fugro Robertson Limited, North Wales, UK) for their constructive and critical reviews.en_US
dc.identifier.doi10.1016/j.chemer.2008.04.005en_US
dc.identifier.endpage159en_US
dc.identifier.issn0009-2819en_US
dc.identifier.issn1611-5864en_US
dc.identifier.issue2en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage143en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.chemer.2008.04.005
dc.identifier.urihttps://hdl.handle.net/20.500.12395/23808
dc.identifier.volume69en_US
dc.identifier.wosWOS:000267254200003en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherELSEVIER GMBH, URBAN & FISCHER VERLAGen_US
dc.relation.ispartofCHEMIE DER ERDE-GEOCHEMISTRYen_US
dc.relation.publicationcategoryDiğeren_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectKarst bauxiteen_US
dc.subjectREE geochemistryen_US
dc.subjectMortas depositen_US
dc.subjectSeydisehiren_US
dc.subjectTurkeyen_US
dc.titleRare earth element (REE) geochemistry and genetic implications of the Mortas bauxite deposit (Seydisehir/Konya - Southern Turkey)en_US
dc.typeReviewen_US

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