Chemical composition of tourmaline from the Asarcik Pb-Zn-Cu +/- U deposit, Sebinkarahisar, Turkey

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dc.contributor.authorYavuz, F.
dc.contributor.authorFuchs, Y.
dc.contributor.authorKarakaya, N.
dc.contributor.authorKarakaya, M. C.
dc.date.accessioned2020-03-26T17:26:29Z
dc.date.available2020-03-26T17:26:29Z
dc.date.issued2008
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractAbundant tourmaline, commonly as rosettes up to 1.5 cm in diameter, is present in the Upper Cretaceous Asarcik granitoid (Sebinkarahisar), Northeastern Turkey. The tourmalines also occur in quartz-tourmaline veins up to 4 m thick that cut the Asarcik granitoid. This granitoid was emplaced in the eastern Pontide Metallogenic Belt, where accompanying tourmalines are found in close association with a vein-type, uranium-bearing Pb-Zn-Cu deposit. Tourmaline crystals are generally optically zoned from core to rim with a bluish green core. Electron-microprobe studies show that tourmalines from the Asarcik granitoid and quartz-tourmaline veins display mainly dravite-schorl solid solutions with a tendency to schorl compositions. The tourmaline from the Asarcik granitoid has Fe/(Fe+Mg) ratios from 0.28 to 0.69 (mean=0.52) and Na/(Na+Ca) ratios from 0.57 to 0.93 (mean=0.76). In contrast, tourmaline in the quartz-tourmaline veins has Fe/(Fe+Mg) ratio from 0.14 to 0.92 (mean=0.59) and Na/(Na+Ca) ratio from 0.78 to 1.00 (mean=0.96). Tourmaline in the veins has a more alkali-deficient trend than that in the granitoid. Substitution mechanisms for the chemical evolution of tourmalines at Asarcik are the MgFe-1, (Fe2+Fe3+)(MgAl)(-1), square Al(NaR)(-1), AlOR2+ (-1)(OH)(-1), square Al2ONa-1R2+ (-2)(OH)(-1), Ca-0.5 square Na-0.5(-1), CaMg2 square Al--1(-2), CaMgO square Al--1(-1)(OH)(-1), CaMg3OH square-1Al-3O-1, CaMgNa-1Al-1, CaONa(OH)(-1), CaMg2OHNa-1Al-2O-1, CaMg2 square Al--1(-2), and CaMg3OH square-1Al-3O-1 exchange vectors. Chemical zoning in the tourmalines is consistent with these substitutions. Stoichiometric calculations of electron-microprobe data in the Asarcik granitoid suggest a relatively oxidizing environment during tourmaline crystallization.en_US
dc.identifier.doi10.1007/s00710-008-0016-3en_US
dc.identifier.endpage208en_US
dc.identifier.issn0930-0708en_US
dc.identifier.issn1438-1168en_US
dc.identifier.issue03.04.2020en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage195en_US
dc.identifier.urihttps://dx.doi.org/10.1007/s00710-008-0016-3
dc.identifier.urihttps://hdl.handle.net/20.500.12395/22249
dc.identifier.volume94en_US
dc.identifier.wosWOS:000260526400003en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSPRINGER WIENen_US
dc.relation.ispartofMINERALOGY AND PETROLOGYen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.titleChemical composition of tourmaline from the Asarcik Pb-Zn-Cu +/- U deposit, Sebinkarahisar, Turkeyen_US
dc.typeArticleen_US

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