MINERALOGICAL AND CHEMICAL PROPERTIES AND THE ORIGIN OF TWO TYPES OF ANALCIME IN SW ANKARA, TURKEY

Basit Öğe Kaydı
dc.contributor.authorKarakaya, Necati
dc.contributor.authorKarakaya, Muazzez Celik
dc.contributor.authorTemel, Abdin
dc.date.accessioned2020-03-26T18:42:30Z
dc.date.available2020-03-26T18:42:30Z
dc.date.issued2013
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractAuthigenic analcimes were observed in different amounts in Miocene units in central Anatolia, Turkey. Two types of analcime occurrences were defined: (1) as continuous but inhomogeneous concentrations varying from 3 to 75 wt.% in lacustrine sedimentary rocks; and (2) as low concentrations (between 3 and 20%) and discontinuous components in the tuffs and claystones intercalated with tuff. The type 2 analcimes have been investigated by many researchers while the origin and properties of the sedimentary analcimes, which are widespread in different parts of Turkey, have not been clarified. The present study focused on the genesis and the mineralogical and geochemical properties of both types of analcime. The analcimes were investigated using X-ray diffraction, optical microscopy, scanning electron microscopy, and chemical analytical methods. In the first type, other than volcaniclastic material, analcime is the only zeolite mineral. The first type of analcime was associated mainly with montmorillonite, dolomite, and feldspar and sometimes with calcite, and rarely with illite and kaolinite. The second type of analcime was found as an accessory mineral accompanied by montmorillonite, feldspar, and heulandite/clinoptilolite, and more rarely by erionite, kaolinite, and mica. The pyroclastic rocks are chemically classified into two subgroups, dacitic and andesitic rocks, with an intermediate to high silica content and a high percentage of alkali cations. Analcime in the pyroclastics intercalated with clay layers commonly replaced early-formed zeolites, such as clinoptilolite or volcanic materials. The first type of analcime was not formed from precursor zeolites and had a different origin than the second type. Type 1 analcime contains larger amounts of Si (34.19 to 34.68 Si per unit cell) and less Al and Na than in theoretical analcime. The theoretical structural formula of analcime is Na-16(Al16Si32O96)H2O. The strongly decomposing feldspar and clay minerals (in particular montmorillonite and partially illite) of the older formations and the dissolution of halite and also soda minerals, e.g. thenardite and glauberite, allow the authigenic formation of type 1 analcime, dolomite, K-feldspar, and montmorillonite in a saline and highly alkaline environment such as the marginal part of Lake Tuzgolu. Type 2 analcime may have been precipitated directly from solution, pyroclastic material, or precursor zeolite minerals in saline and alkaline lake water.en_US
dc.description.sponsorshipTUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [109Y301]; Selcuk University Scientific Research projectsSelcuk University [BAP 10401052]en_US
dc.description.sponsorshipThe present investigation was made possible through financial support by the TUBITAK 109Y301 project and the Selcuk University Scientific Research projects support program BAP 10401052. The authors acknowledge Chris Fleisher (Department of Geology, University of Georgia) for his help with the EMPA analyses. The authors are grateful to Prof. Dr. O. Isik Ece and two anonymous reviewers for their constructive comments which greatly improved the quality of the manuscript.en_US
dc.identifier.doi10.1346/CCMN.2013.0610306en_US
dc.identifier.endpage257en_US
dc.identifier.issn0009-8604en_US
dc.identifier.issn1552-8367en_US
dc.identifier.issue03.04.2020en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage231en_US
dc.identifier.urihttps://dx.doi.org/10.1346/CCMN.2013.0610306
dc.identifier.urihttps://hdl.handle.net/20.500.12395/29644
dc.identifier.volume61en_US
dc.identifier.wosWOS:000327001000006en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherCLAY MINERALS SOCen_US
dc.relation.ispartofCLAYS AND CLAY MINERALSen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectAnalcimeen_US
dc.subjectCentral Anatoliaen_US
dc.subjectClinoptiloliteen_US
dc.subjectZeoliteen_US
dc.subjectTurkeyen_US
dc.titleMINERALOGICAL AND CHEMICAL PROPERTIES AND THE ORIGIN OF TWO TYPES OF ANALCIME IN SW ANKARA, TURKEYen_US
dc.typeArticleen_US

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