Omai Gold Mines Corp. is advancing its 100%-owned Omai Gold Project in Guyana, a past-producing operation. Over the past four years, the Omai team has delivered significant new discoveries. The project benefits from established infrastructure, a proven mining jurisdiction, and recent exploration success that has grown resources well beyond historical production of 3.8 million ounces of gold produced between 1993 and 2005.
In April 2026, the Company announced an updated NI 43-101 Mineral Resource Estimate of 5.5 million ounces of gold (Inferred) averaging 1.59 g/t Au in 106.6 Mtonnes and 2.5 million ounces of gold (Indicated) averaging 2.04 g/t Au in 38.1 Mtonnes hosted within the adjacent Wenot and Gilt Creek deposits. A 50,000 metre drill program is underway with 5 drill rigs turning. An updated Preliminary Economic Assessment (“PEA”), is planned for completion H1 2026. This is expected to include a much larger mine plan with the expanded Wenot Mineral Resource Estimate and will also incorporate the Gilt Creek underground deposit into the mine plan for the first time.
Updated Mineral Resources (effective date: April 7, 2026)
The Omai Gold Property hosts two orogenic gold deposits: the shear-hosted Wenot Deposit and the adjacent, intrusion-hosted Gilt Deposit (Figure 1), with a combined updated MRE (over the August 2025 MRE) of:
- 2,495,000 ounces of gold (Indicated), a 17.6% increase, averaging 2.04 g/t Au in 38.1 Mt and
- 5,465,000 ounces of gold (Inferred), a 24.7% increase, averaging 1.59 g/t Au in 106.6 Mt
Wenot Deposit (a constrained pit approach with minor underground is applied)
- 1,453,000 oz of gold in 28.4 Mt (Indicated), a 49.8% increase in ounces (+483,000 oz) over the August 2025 MRE1
- 3,999,000 oz of gold in 92.4 Mt (Inferred), a 7.6% increase in ounces (+282,000 oz)
- 1.59 g/t Au grade of Indicated MRE, an 8.9% increase (from 1.46 g/t Au)
- 1.35 g/t Au grade of Inferred MRE, a 25.8% decrease (from 1.82 g/t Au)
- Increased gold price assumption to $3,000/oz from $2,500/oz at the same cut-off of 0.30 g/t Au
Gilt Deposit (an underground mining approach is applied)
- 1,042,000 oz of gold (Indicated) averaging 3.33 g/t Au, in 9.7 Mt, a 9.5% decrease in ounces (-109,000) over the August 2025 MRE
- 1,465,000 oz of gold (Inferred) averaging 3.22 g/t Au, in 14.2 Mt, a 120.3% increase in ounces (+800,000 oz)
- 3.33 g/t Au grade of Indicated MRE, a 3.4% increase (from 3.22 g/t Au)
- 3.22 g/t Au grade of Inferred MRE, a 3.9% decrease (from 3.35 g/t Au)
- Increased gold price assumption to $3,000/oz from $2,500/oz and increased cut-off to 1.7 g/t Au from 1.5 g/t Au
The Wenot Indicated MRE increased 49.8% to 1,453,000 ounces (“oz”) of gold with an average grade of 1.59 g/t Au, contained in 28.4 million tonnes (“Mt”) and the Wenot Inferred MRE increased 7.6% to 3,999,000 oz grading 1.35 g/t Au, contained in 92.4 Mt. Similarly, the adjacent Gilt Deposit saw an overall increase in ounces over the August 2025 MRE. Gilt’s Inferred MRE increased 120% to 1,465,000 oz averaging 3.22 g/t Au (in 14.2 Mt), while the Indicated MRE decreased by 9.5% to 1,042,000 oz averaging 3.33 g/t Au (in 9.7 Mt).
The Mineral Resource Estimate was prepared in accordance with the CIM Definition Standards (2014) and Estimation Best Practice Guidelines (2019), under the supervision of an Independent Qualified Person as defined by NI 43-101.
Figure 1. Cross-Section of Wenot Shear-Hosted Gold Deposit and Gilt Intrusion-Hosted Deposit
Figure 2. Plan Map of Omai Project showing Gold Mineralized Zones for Wenot and Gilt Deposits
Figure 3. Chart Illustrating Impact of Cut-Off Grade on Size and Grade of Wenot MRE
Figure 4. Impact of Cut-Off Grade on Size and Average Grade of Gilt MRE
