Radisson Mining Resources Inc. Announces Positive Preliminary Economic Assessment for the O'brien Gold Project Located in the Abitibi Region of Quebec

Published: 2025-07-09 08:51:15 ET RDS.V

Published on 07/09/2025 at 08:51

Radisson Mining Resources Inc. announced a positive Preliminary Economic Assessment (the "PEA") for the O'Brien Gold Project ("O'Brien" or the "Project") located in the Abitibi region of Quebec. presents a base case " snapshot-shot" study that excludes recent drilling successes outside the existing MRE and below historic mine workings, with a 50-60,000 metre (m) fully funded drill program ongoing. Rather than high-grading the deposit, as was the case with the historic O'Brien Mine, the PEA is developed from the existing MRE with a lower cut-off, yielding more ounces, more tonnes and better mining continuity at lower average grades.

The ongoing drill program is demonstrating impressive newgold mineralization outside the scope of this initial mine design. InnovExplo (a member of Norda Stelo Inc.; "Norda Stelo") completed the mine design and mine scheduling, BBA Inc. were responsible for water management, surface facilities, and a review of the Project's environmental assessment procedure and permitting requirements, and SLR Consulting (Canada) Ltd. ("SLR") were responsible for the MRE. The PEA is a companion study to a recently completed milling assessment for the Project in which a metallurgical program was conducted with representative samples of mineralized core from O'Brien.

Between the end of 2022 and the present, Radisson completed approximately 50,000 m of additional drilling at the Project. Drilling that was completed within the volume of the MRE is assessed to have no material impact on the overall contained mineral resource, such that the MRE is appropriate in SLR's opinion for mine planning. Drilling that was completed outside the volume of the MRE, including below the level of the historic mine workings at O'Brien, has indicated the presence of significant additional gold mineralization that is not incorporated in the current conceptual mine plan.

Radisson expects to complete a further 50,000-60,000 m of drilling in 2025 and 2026, at which time the Company expects to complete an updated MRE. Mining. Contingencies on individual capital line items in the underground mine design are at 15%, developed within the material, productivity and cost estimates.