Geological, mineralogical and fluid inclusion characteristics of auriferous quartz veins at Guneykoy (Usak, Esme), Western Turkey

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dc.contributor.authorKahya, Asuman
dc.contributor.authorKanaat, Öznur
dc.date.accessioned13.07.201910:50:10
dc.date.accessioned2019-07-16T09:17:14Z
dc.date.available13.07.201910:50:10
dc.date.available2019-07-16T09:17:14Z
dc.date.issued2018
dc.departmentMühendislik Fakültesi
dc.description.abstractAuriferous quartz veins of Guneykoy (Usak, Esme) are hosted in Precambrian greenschist facies granitic gneisses of the Menderes Massif, West Anatolia. The auriferous quartz veins occur as fissure fillings either discordant or parallel to the foliation of the gneiss. The ore mineralogy includes arsenoyprite, pyrite, ilmenite, hematite and rutile as well as trace amounts of limonite, chalcopyrite and covellite. Arsenopyrite is a main ore mineral and often transformed into scorodite along crystal boundaries and fractures. Pyrite occurs within fractures of arsenopyrite and /or between the arsenoyprite crystals. Some pyrite is transformed into marcasite. The grain size of Au is 30-100 mu m, it occurs as single crystal or as aggregates in arsenopyrite. The Au content of the ore sample lies between 7.3 and 10 ppm; Ag varies between 0.9 and 20 ppm; Ni between 20 and 156 ppm; Cu between 9.0 and 14.1 ppm; Pb between 16.4 and 364 ppm and Zn between 2 and 5 ppm. The delta S-34 values of scorodite vary from -3.7 to 10.6 parts per thousand CDT and these values indicate that sulfur in the hydrothermal solution was not mainly derived from a magmatic source or through dissolution and leaching of pre-existing sulfide bearing igneous sources. Fluid inclusion studies on quartz yield homogenization temperatures of the fluids between 270 and 440 degrees C and salinities between 3.4 and 16.6 wt.parts per thousand NaCl equivalent. The low NaCl values may indicate mixing of low salinity meteoric fluids and magmatic fluids. As a result, the Guneykoy gold deposit originated from a metamorphic fluid system related to the Pan-African orogeny characterized by low salinity and enrichment of CO2. Based on geological features, mineral paragenesis and fluid-inclusion studies, the Guneykoy gold mineralization can be classified as orogenic gold-type deposits.
dc.description.sponsorshipAksaray University [2012/02]
dc.description.sponsorshipThis study was funded by Aksaray University, Scientific Research Projects, project no. 2012/02. We sincerely thank Prof. Dr. HCISEYIN YILMAZ for help during sample collection and Dr. ERCAN KUSCU for useful comments. We thank for WOLFGANG SIEBEL (handling editor) and three anonymous reviewers and for their extremely constructive and helpful comments.
dc.identifier.doi10.1127/njma/2017/0057
dc.identifier.endpage25en_US
dc.identifier.issn0077-7757
dc.identifier.issue1en_US
dc.identifier.scopusqualityQ4
dc.identifier.startpage11en_US
dc.identifier.urihttps://doi.org/10.1127/njma/2017/0057
dc.identifier.urihttps://hdl.handle.net/20.500.12451/4719
dc.identifier.volume195en_US
dc.identifier.wosWOS:000427023000002
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherE Schweizerbartsche Verlagsbuchhandlung
dc.relation.ispartofNeues Jahrbuch Fur Mineralogie-Abhandlungen
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectAu
dc.subjectAuriferous Quartz Veins
dc.subjectMenderes Massif
dc.subjectGuneykoy
dc.subjectWestern Anatolia
dc.titleGeological, mineralogical and fluid inclusion characteristics of auriferous quartz veins at Guneykoy (Usak, Esme), Western Turkey
dc.typeArticle

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