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Olympias is an existing gold-silver-lead-zinc mine located in the Halkidiki Peninsula in northern Greece.

Key Facts

Location Halkidiki Peninsula, Greece
Mine type Underground
Metals mined Gold, Silver, Lead, Zinc
Employees/contractors ~750
Expected mine life 22 years*
Deposit type Polymetallic carbonate replacement
Ownership 100%
Resources & Reserves

* Based on current proven and probable reserves.

2021 Outlook

Olympias is expected to mine over 443,000 tonnes of ore at an average grade of 7.3 grams per tonne of gold, 104 grams per tonne of silver, 3% lead and 4% zinc. Forecast 2021 ore processed includes processing of old tailings. Payable production is expected to be 55,000 to 65,000 ounces of gold, 1.1 million to 1.2 million ounces of silver, 11,000 to 11,500 tonnes of lead metal and 11,500 to 12,000 tonnes of zinc metal. Improving production rates and efficiency improvements are beginning to drive a moderating cash operating cost profile. Cash operating costs, net of by-products, are expected to decrease to $775 to $825 per ounce of gold sold.

Forecast 2021 sustaining capital expenditures of $38 to $43 million include underground mine development and the second phase of tailings management facility construction. Growth capital expenditures at Olympias of $10 to $15 million include process plant expansion and contractor development to support planned ramp-up to 650k tonnes per year.

Virtual Tour

Operating Data

2021E 2020A 2019A
Gold produced (oz) (1) 55,000-65,000 58,42337,410
Gold Sold (oz) - 58,902 43,668
Ore mined/processed (t) 443,000 444,299 317,577
Gold grade (g/t) 7.3 7.31 6.97
Silver produced (oz)(1) 1.1 M -1.2 M 971,227 621,864
Lead produced (t)(1) 11,000-11,500 9,565 6,084
Zinc produced (t)(1) 11,500-12,000 10,424 7,784
Cash operating costs ($/oz sold) 775-825 1,078 1,286
All-in Sustaining costs ($/oz sold) - 1,541 1,837
Sustaining capex ($M) 38-43 20.2 20.1

(1)Payable metal produced.

Geology and Mineralization

Olympias is a gold-rich polymetallic carbonate replacement deposit hosted in an interlayered sequence of feldspar-biotite gneiss and marble within the Paleozoic Kerdylia Formation of the Serbo-Macedonian Massif, NE Greece. It contains multiple lenses which together extend in a NNE direction for over 1.5 km, plunge 30 to 35° SW, and have an average thickness of 12 m. Two main end-member ore types are recognised; a base metal-rich ore type and a high arsenic-silica, high gold ore type. The latter typically occurs in the core of the ore lenses and is dominated by grey arsenian pyrite and arsenopyrite and subordinate galena and sphalerite with quartz-rich gangue. Gold grades are typically >10 to 30 g/t. The base metal-rich ore is characterized by variable pyrite, galena and sphalerite with lesser arsenian pyrite and arsenopyrite, and calcite-rich gangue. Gold grades are commonly in the range of 2 to 10 g/t. Both ore types locally contain spectacular bladed to dendritic arsenian pyrite and arsenopyrite with massive base metal sulphides. The Olympias deposit likely formed during the Late Oligocene to Early Miocene coincident with magmatism in the region.


Little systematic exploration has been conducted at Olympias outside of the confines of the known ore body, and consequently nearby areas have outstanding exploration potential. The deposit is open downplunge, and numerous brownfields targets exist that have had little or no drill testing. Ongoing rehabilitation of existing workings and underground development into new areas will provide access to test these exploration targets.


2017 Installation Permit for the paste plant, Technical Study for the Old Olympias Mine Closure, and Mine Operating Permit received in September. Phase II commercial production achieved at the end of December.
2016 Installation permit to begin Phase II granted in March
2013 7% increase in Olympias gold resources year on year from 4.3 Moz to 4.6 Moz
2012 Eldorado acquires Olympias via the acquisition of European Goldfields; Tailings retreatment commenced
2011 EIA received for the Kassandra Mines (includes Olympias, Skouries and Stratoni)
2004 Hellas Gold, a subsidiary of European Goldfields, acquired Olympias from the Greek state
1999 Feasibility study completed by TVX
1995 Ownership transferred to TVX Gold Incorporated from Greek state