Trace element composition of rutile and Zr-in-rutile thermometry in meta-ophiolitic rocks from the Kazdag Massif, NW Turkey

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dc.authoridZack, Thomas/0000-0003-4747-4134
dc.contributor.authorSengun, Firat
dc.contributor.authorZack, Thomas
dc.date.accessioned2025-01-27T20:47:29Z
dc.date.available2025-01-27T20:47:29Z
dc.date.issued2016
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractIn northwest Turkey, ophiolitic meta-gabbros are exposed on the Kazdag Massif located in the southern part of the Biga Peninsula. Trace element composition of rutile and Zr-in-rutile temperatures were determined for meta-gabbros from the Kazdag Massif. The Zr content of all rutiles range from 176 to 428 ppm and rutile grains usually have a homogeneous Zr distribution. The rutile grains from studied samples in the Kazdag Massif are dominated by subchondritic Nb/Ta (11-19) and Zr/Hf ratios (20-33). Nb/Ta and Zr/Hf show positive correlation, which is probably produced by silicate fractionation. The Nb/Ta and Zr/Hf ratios increase with a decrease in Ta and Hf contents. The core of rutile grains are generally characterized by low Nb/Ta ratios of 17-18 whereas the rims exhibit relatively high Nb/Ta ratios of 19-23. Trace element analyses in rutile suggest that these rutile grains were grown from metamorphic fluids. The P-T conditions of meta-gabbros were estimated by both Fe-Mg exchange and Zr-in-rutile thermometers, as well as by the Grt-Hb-Plg-Q geothermobarometer. The temperature range of 639 to 662 A degrees C calculated at 9 kbar using the Zr-in-rutile thermometer is comparable with temperature estimates of the Fe-Mg exchange thermometer, which records amphibolite-facies metamorphism of intermediate P-T conditions. The P-T conditions of meta-ophiolitic rocks suggest that they occur as a different separate higher-pressure tectonic slice in the Kazdag metamorphic sequence. Amphibolite-facies metamorphism resulted from northward subduction of the A degrees zmir-Ankara branch of the Neo-Tethyan Ocean under the Sakarya Zone. Metamorphism was followed by internal imbrication of the Kazdag metamorphic sequence resulting from southerly directed compression during the collision.
dc.description.sponsorshipNational Postdoctoral Research Scholarship Programme; Scientific and Technological Research Council of Turkey (TUBITAK) grant [114Y834]
dc.description.sponsorshipThis study was supported by National Postdoctoral Research Scholarship Programme and the Scientific and Technological Research Council of Turkey (TUBITAK) grant 114Y834. We thank David Cornell for helping with SEM analyses. We would like to thank two anonymous reviewers and Johann Raith for valuable suggestions and editorial handling of manuscript.
dc.identifier.doi10.1007/s00710-016-0433-7
dc.identifier.endpage560
dc.identifier.issn0930-0708
dc.identifier.issn1438-1168
dc.identifier.issue4
dc.identifier.scopus2-s2.0-84957680523
dc.identifier.scopusqualityQ2
dc.identifier.startpage547
dc.identifier.urihttps://doi.org/10.1007/s00710-016-0433-7
dc.identifier.urihttps://hdl.handle.net/20.500.12428/24931
dc.identifier.volume110
dc.identifier.wosWOS:000381084400007
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer Wien
dc.relation.ispartofMineralogy and Petrology
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectNiobium-Tantalum Fractionation
dc.subjectCrust-Mantle System
dc.subjectSubduction-Zones
dc.subjectContinental-Crust
dc.subjectNorthwest Turkey
dc.subjectAqueous Fluid
dc.subjectTemperature Metamorphism
dc.subjectPartition-Coefficients
dc.subjectNb/Ta Fractionation
dc.subjectIsotope Systematics
dc.titleTrace element composition of rutile and Zr-in-rutile thermometry in meta-ophiolitic rocks from the Kazdag Massif, NW Turkey
dc.typeArticle

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