WASSA MINE

Operations at a Glance

Operation Name	Wassa Gold Mine
Parent and ownership percentage	Golden Star Resources (90%) / Government of Ghana (10%)
Country of operation	Ghana
Commodity being mined	Gold
P&P Mineral Reserves	1.09 million ounces
Average grade of P&P Mineral Reserves	Underground 10.8 Mt at 3.1 g/t Au Stockpile 0.7 Mt at 0.62 g/t Au
M&I Mineral Resources	29.3 Mt at 3.8 g/t Au for 3.5 Moz contained
Remaining reserve life of mine	6 years
Geological setting	Quartz carbonate veins with pyrite
Underground mining method	Sub-level longhole open stoping
Processing method	Carbon-in-leach
Processing plant capacity	2.7Mtpa
2020 Production
Gold produced (oz)	168koz

About Wassa

Wassa is located in south-western Ghana. Golden Star commenced production from the surface operation at Wassa in 2005 and commercial production was achieved at Wassa Underground on January 1, 2017. In early 2018 Wassa transitioned into an underground-focused operation. Thanks to the scale of the historical open pit mining operation the processing plant has significant excess capacity and is currently only running at 70-80% (based on 2020 actuals) utilization. Development of the large inferred mineral resource which comprises the southern Extension zone, was the subject of a Preliminary Economic Assessment which was included in the March 2021 Technical Report. Given the scale of the resource at Wassa, the Company is exploring the potential to increase the mining rate in order to fill the mill.

Wassa Underground has exploration upside through extension drilling of B Shoot North, step out drilling on B Shoot South, step out drilling on the 242 Trend and the extension of the F Shoot. This work is expected to increase the mine life of Wassa Underground in the short, medium and long term.

For further information about Wassa’s Mineral Reserves and Mineral Resources, click here:

Reserves and Resources