Cu-Au minerals and transformed mineral phases in the oxidation zone of the Plavica ore deposit, Eastern Macedonia

Serafimovski, Todor and Zlatkov, Goce and Tasev, Goran and Stefanova, Violeta (2016) Cu-Au minerals and transformed mineral phases in the oxidation zone of the Plavica ore deposit, Eastern Macedonia. Geologica Macedonica, 30 (1). pp. 5-21. ISSN 0352-1206

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Abstract

Within this paper we present the latest mineralogical and chemical studies of particular minerals and mineral phases from oxidation zone and partially from the primary sulphide mineralization within the Cu-Аu deposit Plavica. Oxide zone in this ore deposit represents a system of so-called hats of secondary alunitized quartzites intensively oxidized and represented by veinlet and net-like Fe-oxide and Fe-hydroxides. The major feature of this zone is interesting gold concentration. The major part of confirmed gold within alunitized iron quartzites reaches concentrations within the range of 1.80 up to 5.85 g/t Au. The gold is often present as native gold, mostly in Fe-hydroxides and in some places as finely dispersed in pyrite. There its concentration varies from 0.56 g/t up to 0.60 g/t Au. The mineral composition of the oxidation zone is quite extensive (about 31 minerals) of which as principal with prevailing share up to 70% are quartz, alunite, kaolinite and sericite, as secondary minerals accounting up to 11% are pyrite, goethite, chalcocite, hematite, bornite, covellite, malachite and azurite, while as rare mineral phases with share under 5% are chalcopyrite, tetrahedrite, tennantite, enargite, galena, sphalerite and others.

Item Type: Article
Subjects: Natural sciences > Earth and related environmental sciences
Divisions: Faculty of Natural and Technical Sciences
Depositing User: Goran Tasev
Date Deposited: 14 Jun 2016 13:26
Last Modified: 14 Jun 2016 13:26
URI: http://eprints.ugd.edu.mk/id/eprint/15931

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