About Omai Gold Mines
Omai Gold Mines Corp. is a Canadian gold exploration and development company focused on its 100%-owned Omai Gold Project in mining-friendly Guyana, South America. The project hosts two adjacent orogenic gold deposits. An updated Mineral Resource Estimate of 5.5 million oz (Inferred) at 1.59 g/t Au (in 106.6Mt) plus 2.5 million oz (Indicated) at 2.04 g/t Au (in 38.1Mt) was announced April 14, 2026. This includes both the Wenot shear-hosted open pit deposit and the adjacent Gilt intrusion-hosted underground deposit. On August 19, 2026 the Company released a Preliminary Economic Assessment (PEA) which incorporates the expanded Resources in a mine plan with both the Wenot open pit and adjacent Gilt underground gold deposits. These support production averaging 351,488 ounces of gold per year over an 18-year mine life, with peak year production of 435,667 ounces. Total combined production from the two deposits is estimated at 6,326,775 ounces of payable gold. At a base case gold price of $3,600/oz, the project has an after-tax Net Present Value5% (“NPV”) of $4.0 billion, a 24% Internal Rate of Return (“IRR”), and a payback period of 4.1 years. At the recent spot price of $4,200/oz, the after-tax NPV5% increases to $5.5 billion, IRR increases to 30% and the payback reduces to 3.4 years. Initial capital (“Capex”) in the PEA is $1.426 billion, with sustaining and growth capital of $928 million over LOM. Average cash operating costs are estimated at $1,501/oz gold and AISC1 at $1,608/oz.
Five diamond drills are turning (August 2026) continuing to further explore the limits of the very large 2.5km long Wenot deposit, drilling to convert the large inferred resource toward the better defined indicated resources, as well as exploring nearby known higher grade gold occurrences for potential satellite deposits on this prolific past-producing gold camp.
The Omai Gold Mine produced over 3.7 million ounces of gold from 1993 to 20052, ceasing operations when gold was below US$400 per ounce. Omai benefits from being a brownfields site with some existing infrastructure and is connected by paved highway to the two largest cities in Guyana, Georgetown and Linden.
