Geochemical, mineralogical and isotopic signatures of the Semikan, West KasrA±k Turkish phosphorites from the Derik-MazA±dagA±-Mardin area, SE Anatolia

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dc.contributor.authorImamoglu, M. Sefik
dc.contributor.authorNathan, Yaacov
dc.contributor.authorCoban, Hakan
dc.contributor.authorSoudry, David
dc.contributor.authorGlenn, Craig
dc.date.accessioned2024-04-24T16:01:55Z
dc.date.available2024-04-24T16:01:55Z
dc.date.issued2009
dc.departmentDicle Üniversitesien_US
dc.description.abstractThe geochemistry and mineralogy of a condensed section, similar to 6 m thick of the West Kasrik member (Coniacian-Santonian) near the uplifted northern flank of the Mardin-Derik anticline (south-eastern Turkey) was studied. The only deposit exploited in Turkey is found in this area. The sediment textures as well as the mineralogical and the geochemical results collectively suggest that these recycled phosphorites accumulated in areas of intensive very early diagenesis of the sediments in highly oxic bottom waters, and almost no detrital apport. The total concentration of redox-sensitive trace metals is very low (< 600 mu g/g); in addition the structural CO2 and F/P2O5 are unusually high (similar to 5 wt % and 0.14, respectively). REE distribution shows a clear seawater pattern with a strongly negative Ce-anomaly (0.20 +/- A 0.02) and heavy REE enrichment (Lu-N/La-N = 1.50 +/- A 0.12), however their total concentration is very low. The low REE contents, quite unexpected in recycled phosphorites, are explained by the scarcity of terrigenous components which leads to minimal incorporation of REEs from detrital clastic phases in the CFA fraction. Weathering previously suggested as responsible for the high P enrichment of the Mazidagi phosphorites is rather improbable in the samples we studied, in view of their high structural CO2, high F/P2O5, high (La/Nd)(N) and (La/Sm)(N) ratios, and high Sr/P and Ca/P of separated CFA fractions that all negate post-depositional weathering. More likely, the high P enrichment of some rocks (P2O5 content reaches 34%) was produced by sedimentary and early diagenetic processes acting in oxygenated areas of starved sedimentation on and around tectonic highs.en_US
dc.description.sponsorshipUnited StatesIsrael Binational Science Foundation (BSF) [1999232]; Geological Survey of Israel, GSI [40030]; University of Hawaii School of Ocean and Earth Science and Technologyen_US
dc.description.sponsorshipThis study was supported by the United StatesIsrael Binational Science Foundation (BSF), grant 1999232, the Geological Survey of Israel, GSI Project 40030, and the University of Hawaii School of Ocean and Earth Science and Technology. The authors are grateful to two anonymous reviewers for their comments which helped to improve the manuscript. They thank C. Netzer-Cohen for the graphics and B. Katz for her careful linguistic editing.en_US
dc.identifier.doi10.1007/s00531-008-0332-1
dc.identifier.endpage1690en_US
dc.identifier.issn1437-3254
dc.identifier.issn1437-3262
dc.identifier.issue7en_US
dc.identifier.scopus2-s2.0-70349738163
dc.identifier.scopusqualityQ2
dc.identifier.startpage1679en_US
dc.identifier.urihttps://doi.org/10.1007/s00531-008-0332-1
dc.identifier.urihttps://hdl.handle.net/11468/14500
dc.identifier.volume98en_US
dc.identifier.wosWOS:000270384600010
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofInternational Journal of Earth Sciences
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectPhosphoriteen_US
dc.subjectTurkeyen_US
dc.subjectConiacian-Santonianen_US
dc.subjectTethysen_US
dc.subjectGeochemistryen_US
dc.subjectReeen_US
dc.titleGeochemical, mineralogical and isotopic signatures of the Semikan, West KasrA±k Turkish phosphorites from the Derik-MazA±dagA±-Mardin area, SE Anatoliaen_US
dc.titleGeochemical, mineralogical and isotopic signatures of the Semikan, West KasrA±k Turkish phosphorites from the Derik-MazA±dagA±-Mardin area, SE Anatolia
dc.typeArticleen_US

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