Geological and Atmospheric Sciences
Journal or Book Title
Smart Science for Exploration and Mining
Tenth Biennial SGA Meeting
August 17-20, 2009
The Perama Hill deposit is a high- to intermediate-sulfidation Au-Ag-Te epithermal system hosted within silicic and argillic altered andesitic hyaloclastic rocks and overlying sandstones. New combined EPMA and fluid inclusion data from the deeper parts of the deposit suggest early deposition of native gold, Bi-chalcogenides (kawazulite/tetradymite solid solutions) and thiostannates (probably at 291-349°C), followed by precious metal tellurides and electrum between 193 and 269°C. There is a trend from high- to intermediate-sulfidation state fluid conditions with time. The coexistence of both liquid- and vapor-rich inclusions homogenizing within the same temperature range demonstrates that boiling occurred during formation of the ore minerals. The kawazulite/tetradymitess-gold association at Perama Hill suggests that it could have formed from a sulfide melt in the system Bi-Au-Se-Te system as gold was scavenged from the hydrothermal ore-forming fluid at elevated temperatures.
Society for Geology Applied to Mineral Deposits
Voudouris, Panagiotis; Spry, Paul G.; Melfos, Vasilios; Moritz, Robert; Papavassiliou, Costas; and Falalakis, George, "Mineralogical Constraints on the Formation of the Perama Hill High-Sulfidation Epithermal Au-Ag-Te Deposit, Northeastern Greece" (2009). Geological and Atmospheric Sciences Conference Presentations, Posters and Proceedings. 18.