Campus Units

Geological and Atmospheric Sciences

Document Type

Conference Proceeding

Publication Version

Published Version

Publication Date

2009

Journal or Book Title

Smart Science for Exploration and Mining

First Page

545

Last Page

547

Conference Title

Tenth Biennial SGA Meeting

Conference Date

August 17-20, 2009

City

Townsville, Australia

Abstract

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.

Comments

This proceeding is published as Voudouris, P., Spry, P. G., Melfos, V., Moritz, R., Papavassiliou, C.M. and Falalakis, G., 2009, Mineralogical constraints to the formation of the Perama Hill high-sulfidation epithermal Au-Ag-Te deposit, northeastern Greece, in Williams, P.J., Oliver, N., and Rusk, B. (eds.) Smart Science for Exploration and Mining, Proceedings of the 10th Society of Geology Applied to Ore Deposits, Townsville, August 2009, p. 545-547. Posted with permission.

Copyright Owner

Society for Geology Applied to Mineral Deposits

Language

en

File Format

application/pdf

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