Composition of some major mineral phases from the Plavica epithermal gold deposit, Eastern Macedonia

Zlatkov, Goce and Tasev, Goran and Stefanova, Violeta and Bogdanov, Kamen and Serafimovski, Todor (2014) Composition of some major mineral phases from the Plavica epithermal gold deposit, Eastern Macedonia. Geologica Macedonica, 28 (2). pp. 149-163. ISSN O352-1206

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Abstract

High-sulphidation epithermal gold has been determined and studied in the Plavica deposit, which is an integral part of the Kratovo-Zletovo volcanic area. Epithermal gold and associated mineral phases have been determined in silicified tuff, secondary quartzite, quartz-pyrite-enargite veins and mainly disseminated within an altered, but mostly silicified volcanic setting. Beside gold within this acidsulphate volcanic environment was determined the presence of contaminated pyrite, zinc-tetrahedrite, enargite, and certainly seligmanite regularly and commonly present copper association led by chalcopyrite, followed by bornite, chalcocite, covellite, as well as slightly higher temperature associations of arsenopyrite and molybdenite. Most of these accessory sulphide mineral phases within this study were observed under state of the art polarized optical microscope, and the electron microprobe, which results are presented in detail in this paper. For illustration we want to emphasize that in pyrite were found increased concentrations of copper and zinc and less silver, then enargite with increased zinc concentrations (0.24– 7.56 Zn), antimony (0.46–1.33% Sb) and silver (0.09–0.54% Ag) , tennantite with increased iron (0.21– 1.55% Fe), zinc (6.24–9.06% Zn) and silver (0.08–0.87% Ag), while within the molybdenite elevated concentrations were detected for sulfur and iron.

Item Type: Article
Subjects: Natural sciences > Earth and related environmental sciences
Divisions: Faculty of Natural and Technical Sciences
Depositing User: Goran Tasev
Date Deposited: 29 Dec 2014 11:14
Last Modified: 29 Dec 2014 11:14
URI: http://eprints.ugd.edu.mk/id/eprint/11880

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