Omai Gold Confirms Mineralisation 700 Metres Below Wenot Deposit

• Drill hole 25ODD-122W intersected seven gold zones approximately 700 metres below the previously known extent of the Wenot Gold Deposit, at vertical depths between 1,220 and 1,280 metres from surface.
• Key intercepts include 5.12 g/t gold over 3.6 metres, 2.57 g/t over 8.6 metres, 3.34 g/t over 4.5 metres, and 2.19 g/t over 7.9 metres (including 3.61 g/t over 4.4 metres).
• The hole confirmed the Wenot Shear Corridor continues at depth, with shearing encountered from approximately 1,739 metres downhole until the hole ended at 2,014 metres.
• Gold zones span at least 220 metres north to south at depth, compared to the 2.5-kilometre strike length of the upper Wenot Deposit.
• The discovery will not be integrated into near-term resource estimates but indicates potential for deposit expansion beyond current mineral resources.

Omai Gold Mines Corp. (TSXV: OMG, OTCQB: OMGGF) is a Canadian gold exploration and development company advancing two orogenic gold deposits at its wholly owned Omai Gold Project in Guyana, South America. In August 2025, the company announced a 96% increase to the Wenot Gold Deposit mineral resource estimate, bringing the combined Wenot and Gilt Creek global resource to 2.1 million ounces indicated and 4.4 million ounces inferred. The project site benefits from existing infrastructure and is connected to Georgetown and Linden, Guyana's two largest cities. Five drills are currently active on the property.

Deep Drilling Results and Gold Intercepts

Drill hole 25ODD-122W reached a final depth of 2,014 metres, testing the continuation of the Wenot Shear Corridor below the known deposit. The programme intersected the shear corridor at approximately 1,740 metres downhole, with gold zones continuing to 2,009.8 metres, less than five metres from the end of the hole. The hole ended within the Wenot Shear Corridor due to excessive flattening, suggesting the shear zone likely continues further.

Seven discrete gold zones were identified in the lower section of the hole across different rock types. The volcanic-hosted zones returned 1.23 g/t gold over 4.6 metres and 2.07 g/t over 3.3 metres. The central quartz-feldspar porphyry dike, which occupies the contact between volcanic and sedimentary rocks, contained visible gold and returned 1.80 g/t gold over 5.5 metres. The sedimentary sequence hosted the strongest grades, including 5.12 g/t gold over 3.6 metres and 3.34 g/t over 4.5 metres.

Using wider internal dilution parameters, selected intervals returned 0.74 g/t gold over 47.0 metres and 1.16 g/t over 20.4 metres in the southern sedimentary rocks. The drill programme used a 0.5 g/t gold cutoff to calculate assay composites due to increased depth, with a maximum internal dilution of three metres. Results for the upper 699 metres of the hole, which intersected the Gilt Creek deposit, await assays using metallic screening.

Wenot Shear Corridor Extension at Depth

The drill hole confirmed that the Wenot Shear Corridor, which hosts the Wenot gold deposit to a maximum depth of 530 metres, continues to approximately 1,250 metres below surface.

President and CEO Elaine Ellingham commented,

"This 'proof of concept' sheds a new light on the ultimate size potential of the Wenot deposit. This apparent down dip extension of the Wenot gold deposit is at least 700m below the previously deepest-known mineralization at Wenot. Although it will not be integrated into a near-term resource estimate, it suggests a doubling of the scale of the overall size potential of Wenot."

The shear corridor at depth maintains characteristics similar to the upper deposit, including the presence of the central quartz-feldspar porphyry dike at the contact between volcanic and sedimentary rocks. The dike is variably silicified and sericitised with approximately 2% pyrite, and several points of visible gold were recorded. The sedimentary sequence south of this contact hosted four of the seven gold zones identified at depth.

The gold zones were intersected across at least 220 metres north to south.

President and CEO Elaine Ellingham stated,

"Multiple gold zones were intersected across at least 220m north to south and these could similarly have significant strike length considering the 2.5 km length of the Wenot Deposit."

Deposit Size and Mine Life Context

The deepest previously known mineralisation at Wenot was at 530 metres depth. The new intercepts at approximately 700 metres below this level represent an extension of the mineralised system.

President and CEO Elaine Ellingham stated,

"We believe that the current Mineral Resource Estimate that includes both the Wenot and Gilt Creek gold deposits can support a significant mine life, and this discovery 700m below the known Wenot deposit suggests potential for a much longer mine life."

The August 2025 mineral resource estimate includes 970,000 ounces indicated and 3.7 million ounces inferred at Wenot, plus the adjacent Gilt Creek deposit. A baseline preliminary economic assessment announced in April 2024 contemplated an open pit development scenario and included less than 30% of the current mineral resource estimate.

President and CEO Elaine Ellingham noted that

"although it will not be integrated into a near-term resource estimate, it suggests a doubling of the scale of the overall size potential of Wenot."

The company noted that while the deep intercepts demonstrate extension of the mineralised system, additional work would be required to incorporate this material into resource classifications. The vertical extent of the newly discovered mineralisation lies well below typical open pit depths, indicating potential future underground mining scenarios rather than expansion of near-term open pit resources.

Next Steps

Omai Gold currently operates five drill rigs on the property. At Wenot, drilling focuses on optimising the upcoming preliminary economic assessment, testing deposit limits to the east and west, and upgrading inferred mineral resources to indicated category. Additional drilling is exploring known gold occurrences for potential near-surface satellite deposits. An updated preliminary economic assessment is planned for the first half of 2026 to include the expanded Wenot open pit deposit and the adjacent Gilt Creek underground deposit.

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