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Fluid Inclusions at the Plavica Au-Ag-Cu Telescoped Porphyry–Epithermal System, Former Yugoslavian Republic of Macedonia (FYROM)

1
Department of Mineralogy, Petrology and Economic Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
2
Department of Mineralogy-Petrology, National and Kapodistrian University of Athens, 15784 Athens, Greece
3
Department of Mineral Deposits, Faculty of Natural and Technical Sciences, University “Goce Delcev” Štip, Goce Delcev 89, 2000 Štip, Macedonia
*
Author to whom correspondence should be addressed.
Geosciences 2019, 9(2), 88; https://doi.org/10.3390/geosciences9020088
Received: 18 December 2018 / Revised: 6 February 2019 / Accepted: 11 February 2019 / Published: 14 February 2019
(This article belongs to the Special Issue Magmatic-Hydrothermal Ore Deposits)
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Abstract

The Plavica Au-Ag-Cu porphyry and high sulfidation (HS) epithermal deposit is located at the Kratovo–Zlatovo volcanic field in Eastern Former Yugoslavian Republic of Macedonia. In this study, new fluid inclusions data provide additional evidence of the presence of a porphyry style mineralization which is associated with an overlain HS epithermal deposit. The Oligocene–Miocene magmatic rocks have a calc–alkaline to high-K calc–alkaline affinity and consist of sub-volcanic intrusions and volcanic rocks. Previous studies distinguished four alteration types: (a) Sericitic, (b) advanced argillic, (c) silicification, and (d) propylitic alteration. Fluid inclusions showed an early magmatic brine in porphyry style veins with high salinity (33–57 wt% NaCl equiv.), which coexists with a vapor rich fluid with lower salinity (14–20 wt% NaCl equiv.), at temperatures 380–500 °C, under boiling conditions. At shallower depths, the fluid inclusions demonstrate various HS–epithermal deposits which were formed by moderate to low salinity (3–14 wt% NaCl equiv.) hydrothermal fluids at lower temperatures from 200 to 300 °C. View Full-Text
Keywords: Porphyry; epithermal; hypersaline fluid; boiling; Plavica Porphyry; epithermal; hypersaline fluid; boiling; Plavica
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Melfos, V.; Voudouris, P.; Serafimovski, T.; Tasev, G. Fluid Inclusions at the Plavica Au-Ag-Cu Telescoped Porphyry–Epithermal System, Former Yugoslavian Republic of Macedonia (FYROM). Geosciences 2019, 9, 88.

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