Clay minerals in hydrothermally altered volcanic rocks, Eastern Pontides, Turkey

Basit Öğe Kaydı
dc.contributor.authorCelik, M
dc.contributor.authorKarakaya, N
dc.contributor.authorTemel, A
dc.date.accessioned2020-03-26T16:27:03Z
dc.date.available2020-03-26T16:27:03Z
dc.date.issued1999
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractExtensive hydrothermal alteration is observed around volcanogenic massive sulfide deposits. These deposits are related to Late Cretaceous volcanism in various parts of the Eastern Pontide province. Mineral assemblages resulting from alteration consist of mostly clay minerals and silica polymorphs, some sulfate minerals, and scarce zeolite minerals. The clay minerals are kaolinite, illite, and smectite. These minerals were examined using X-ray diffraction (XRD), scanning electron microscopy (SEM)energy dispersive spectrometry (EDS), X-ray fluorescence spectroscopy (XRF), and differential thermal analysis (DTA)-thermal gravimetry (TG) techniques. The illite and the toseki deposits are a result of hydrothermal alteration of dacitic-andesitic volcanites. Two groups of bentonite deposits occur; the first mainly formed by hydrothermal solution whereas the second group resulted from halmyrolysis. The smectite in these alteration zones is generally montmorillonitic in composition and the interlayer cation is mostly Ca and lesser amounts of Na. The SiO2 and Fe2O3 contents of the hydrothermal bentonites are higher than those of the halmyrolysis smectites: however, the MgO content of both groups is similar. The Na2O and K2O contents of both groups are generally <0.5%. The hydrothermal bentonites are not plastic and have open honeycomb microtextures, although the halmyrolitic smectites are plastic with ultrafine and rod-shaped textures. Illite, which contains some smectite layers, is a 1M polymorph, and has an asymmetry to the low-angle side of the XRD peaks. The impure illite deposits contain various combinations of smectite, kaolinite and gypsum, galena, sphalerite, pyrite, goetite, and quartz. The illite has >35 wt. % Al2O3. The toseki raw material, which may be possibly useful as a porcelain raw material, is composed mainly of illite, kaolinite and quartz, or illite and quartz. The crystallinity of the kaolinite is poor.en_US
dc.identifier.doi10.1346/CCMN.1999.0470604en_US
dc.identifier.endpage717en_US
dc.identifier.issn0009-8604en_US
dc.identifier.issue6en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage708en_US
dc.identifier.urihttps://dx.doi.org/10.1346/CCMN.1999.0470604
dc.identifier.urihttps://hdl.handle.net/20.500.12395/16936
dc.identifier.volume47en_US
dc.identifier.wosWOS:000084510400004en_US
dc.identifier.wosqualityQ1en_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/openAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectbentoniteen_US
dc.subjectclay mineralsen_US
dc.subjectEastern Pontidesen_US
dc.subjecthydrothermal alterationen_US
dc.subjectilliteen_US
dc.subjectsmectiteen_US
dc.subjecttosekien_US
dc.subjectvolcanogenic massive sulfideen_US
dc.titleClay minerals in hydrothermally altered volcanic rocks, Eastern Pontides, Turkeyen_US
dc.typeArticleen_US

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu