Genesis of Tertiary Akcakis,la vein-type Pb-Zn-Cu mineralisation (Central Anatolia, Turkey): Evidence from fluid inclusion and O, H, S, Pb-isotope compositions

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dc.authoridHarris, Chris/0000-0003-0340-6674
dc.contributor.authorUnal-Cakir, Esra
dc.contributor.authorGokce, Ahmet
dc.contributor.authorHarris, Chris
dc.date.accessioned2024-10-26T18:09:05Z
dc.date.available2024-10-26T18:09:05Z
dc.date.issued2023
dc.departmentSivas Cumhuriyet Üniversitesi
dc.description.abstractThe Akcakis,la Pb-Zn-Cu vein type deposit is one of the active mining deposits located in the Akdagmadeni (Yozgat) metallogenic province in Turkey. The sulfide vein deposit, trending E-W, is hosted by calcschist of the Akcakis,la and Topaktas, formations of Akdagmadeni metamorphites, which are intruded by the Central Anatolian granitoids and overlain by sedimentary and Tertiary volcanic rocks. Microthermometric measurements indicate that the Pb-Zn-Cu deposit formed by hydrothermal fluids containing dissolved CaCl2, MgCl2 and NaCl. A mixing of fluids with greatly varying salinities and temperatures is shown by the wide range of calculated salinity (0.2-10.4%) and temperature (170-400 degrees C) values. Isotope ratios of oxygen (& delta;18OH2O =-5.09 to +4.71%o) and hydrogen (& delta;D =-67%o and-82%o) suggest that water in hydrothermal fluid might be either mixing of meteoric and magmatic waters or meteoric water that oxygen isotope composition was modified by fluid-rock interaction. Sulphide minerals exhibit & delta;34S values ranging from 5.51%o to 8.40%o, which assume a magmatic sulphur source modified by assimilation of upper crustal material (possibly the host metamorphites). In galena from the studied Akcakis,la Pb-Zn-Cu deposit ratios of 206Pb/204Pb (18.783-18.821),207Pb/204Pb (15.654-15.700) and 208Pb/204Pb (38.874-39.039) suggest a mixture of lead sources from orogenic-upper crust materials. We assume that hydrothermal fluids dissolved the sulphur from the intruded granitoids and the lead from the host metamorphites. The galena Pb model ages values point out two different ore forming ages; suggesting initial formation in upper Cretaceous (87 Ma) and highly reworking in Eocene-Oligocene (23 and 39 Ma).
dc.description.sponsorshipYozgat Bozok University Scientific Research Project [6602 b-MUH/18-238]
dc.description.sponsorshipThis study was supported by the Yozgat Bozok University Scientific Research Project (6602 b-MUH/18-238) . We thank Sherissa Roopnarain for help with O and H isotope analysis and the editors and anonymous reviewers for their helpful comments.
dc.identifier.doi10.1016/j.jafrearsci.2023.105008
dc.identifier.issn1464-343X
dc.identifier.issn1879-1956
dc.identifier.scopus2-s2.0-85164346299
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1016/j.jafrearsci.2023.105008
dc.identifier.urihttps://hdl.handle.net/20.500.12418/29945
dc.identifier.volume205
dc.identifier.wosWOS:001038302100001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofJournal of African Earth Sciences
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectLead-zinc-copper deposit
dc.subjectFluid inclusion
dc.subjectIsotope geochemistry
dc.subjectAkcakis,la-Akdagmadeni
dc.titleGenesis of Tertiary Akcakis,la vein-type Pb-Zn-Cu mineralisation (Central Anatolia, Turkey): Evidence from fluid inclusion and O, H, S, Pb-isotope compositions
dc.typeArticle

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