Radisson Mining · TSXV:RDS
Radisson Mining — Radisson Mining Resources — Technical Presentation (July 2025)
38 slides from Radisson Mining's technical presentation, Jul 9, 2025
Slide 1: The O'Brien Gold Project: A New Vision for an Historic High-Grade Gold Mine
The O'Brien Gold Project: A New Vision for an Historic High-Grade Gold Mine in Québec's Abitibi O’Brien Gold Project PEA Webinar July 9, 2025 TSXV:RDS OTCQB:RMRDF TSXV:RDS
Slide 2: Cautionary Statement Regarding Forward-Looking Information
Cautionary Statement Regarding Forward-Looking Information This presentation contains "forward-looking information" within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections, and interpretations as at the date of this presentation. For
Slide 3: Cautionary Statement: Qualified Persons and Non-IFRS Measures
Cautionary Statement Regarding Forward-Looking Information Qualified Persons Disclosure of a scientific or technical nature in this presentation was prepared under the supervision of Mr. Richard Nieminen, P.Geo, (QC), a geological consultant for Radisson and a Qualified Person for purposes of NI 43-
Slide 4: Contents
Contents Presenting Today A: O’Brien PEA 1. Basis of Study and Summary Results 2. Project Location Matt Manson Dave Ross President & CEO VP Exploration 3. Doyon, IAMGOLD and Milling Assessment 4. Mineral Resources 5. Mine Design and Production Schedule PEA Authors 6. Costing Metallurgy, Doyon Millin
Slide 5: Part A O'Brien PEA
RDS:TSXV Part A O’Brien PEA Matt Manson, President & CEO Dave Ross, VP Exploration 5 TSXV:RDS
Slide 6: O'Brien Preliminary Economic Assessment Basis of Study
O’Brien Preliminary Economic Assessment Basis of Study Westwood-Doyon • Assumes off-site toll milling based on the results of a recent (IAMGOLD) milling assessment and metallurgical study that demonstrated the potential compatibility of the nearby Doyon gold mill, part of LaRonde IAMGOLD Corporation
Slide 7: O'Brien PEA: Summary Results
O’Brien PEA: Summary Results Value (After Tax)1 Cost1,3 US$2,550 Au US$3,300 Au Initial Capital C$175M NPV5% C$532M C$871M NPV5%/Capex 3.0 IRR 48% 74% Sustaining Capital C$173M Payback (years) 2.0 1.1 Cash Costs US$861/oz Au AISC4 US$1,059/oz Mine Plan1 Assumptions Mine Life 11 years Gold Price, US$
Slide 8: Located in the World's Most Prolific Gold Belt
Located in the World’s Most Prolific Gold Belt • Located in the Abitibi greenstone belt hosting +100 million gold ounces N between Ontario and Québec in eastern Canada. One of the largest and most prolific Neoarchean greenstone belts in the world • O’Brien is located in the 25 Moz Cadillac-Bousquet
Slide 9: Good Neighbours
Good Neighbours LaRonde Westwood-Doyon O’Brien 9 TSXV:RDS
Slide 10: O'Brien Mineralogy
O’Brien Mineralogy • Quartz-sulphide veins with coarse VG within Piché Formation adjacent to the Cadillac-Larder Lake Break • High strain, with biotite alteration and pyrite/arsenopyrite association • Pattern of very high-grade, narrow intercepts within broader altered and mineralized envelopes • OB
Slide 11: O'Brien PEA Metallurgical Study and Doyon Milling Assessment
O’Brien PEA Metallurgical Study and Doyon Milling Assessment MOU with IAMGOLD and the Doyon Mill: • Sept. 9, 2024: MOU with IAMGOLD to facilitate milling assessment of processing O’Brien mined material at Doyon mill. Non-binding/non-exclusive Westwood-Doyon (IAMGOLD) • Doyon is part of the Westwood-
Slide 12: O'Brien PEA Mineral Resource Estimate
O’Brien PEA Mineral Resource Estimate Indicated Mineral Resources Inferred Mineral Resources Basis of Estimate Tonnage (kt) Grade (g/t Au) Oz (koz Au) Tonnage (kt) Grade (g/t Au) Oz (koz Au) MRE 2023, 4.5 g/t Au Cutoff (US$1,600, 1.2m minimum width, 1,517 10.3 501 1,601 8.7 446 85% Recovery) MRE for
Slide 13: O'Brien PEA Mineral Resource Estimate
O’Brien PEA Mineral Resource Estimate 5.2 Km W WEST O’BRIEN O’BRIEN EAST O’BRIEN E Thompson Cadillac Kewagama Surface - 250 m 700 m 1750 m - 500 m MRE 2023, 4.5 g/t Au Cutoff Open Trend Trend 5 - 750 m (US$1,600, 1.2m minimum width, 85% Recovery) Trend 4 Indicated Resource Inferred Resource 3 - 1000
Slide 14: O'Brien PEA Underground Mine Design
O’Brien PEA Underground Mine Design • Long Hole Stoping with cemented rock backfill • DSO Optimization at US$2,000/oz Au • Twin portals and 4.5mx4.5m ramp access • 2.2m minimum and 2.7m average stope widths • 20 tonne trucks and vertical conveyor from 300m level to surface • 86km of development and
Slide 15: O'Brien PEA Production Schedule
O’Brien PEA Production Schedule • 11-Year Mine life to 900m depth • Years 2-8 stope production at 1,160 tpd • PEA contemplates up to 2,000 tpd of mill capacity • Hence, all mineralized mined material is scheduled for processing, including low grade development materials, giving average head grade of
Slide 16: O'Brien PEA Production Classification
O’Brien PEA Production Classification • Approximately 56% of mined ounces in the PEA mine plan are from Indicated Mineral Resources, and 44% from Inferred Mineral Resources • Indicated and Inferred Mineral Resource blocks are equally distributed through the 11- year mine life • Future infill drillin
Slide 17: Surface Facilities
Surface Facilities • No mill, tailings facility, or major surface earthworks • No requirement for major access or power infrastructure Water Treatment • No camp, surface maintenance (small vehicle maintenance at existing O’Brien facilities) Waste Rock Historic Mine • New UG portals and site infrastr
Slide 18: O'Brien PEA Costs
O’Brien PEA Costs LOM Capital Costs (C$M)note 1,2 LOM Operating Costs and AISCnote 1,2 Mining Capex $93 $346 C$M Mining, Haulage and Water Management Mobile Equipment $25.7 $75.66 C$/tonne milled Mine Development $47.4 $173 C$M Buildings $0.4 Processing & Tailings $37.71 C$/tonne milled Mine Service
Slide 19: O'Brien PEA Valuation Sensitivities
O’Brien PEA Valuation Sensitivities Valuation Sensitivities to Gold Price (C$M) note1,2 Gold Price (US$/oz) $1,800 $2,200 $2,550 $3,000 $3,300 Downside Consensus Upside Spot Price Case After Tax NPV5% C$M $193 $374 $532 $736 $871 After Tax IRR 21% 35% 48% 64% 74% NPV5%/Capex 1.1 2.1 3.0 4.2 5.0 Payb
Slide 20: Schedule, Permitting and EA
Schedule, Permitting and EA • O’Brien is subject to the Québec Environmental Quality Act and is expected to be subject to a Québec Environmental Impact Assessment and Review. The Project is not expected to be subject to a Federal Impact Assessment procedure but will be subject to the Metal and Diamo
Slide 21: Part B O'Brien Exploration
RDS:TSXV Part B O’Brien Exploration Dave Ross, VP Exploration 21 TSXV:RDS
Slide 22: Understand Geology: Regional Setting
Understand Geology: Regional Setting Project O’Brien TSXV:RDS 22
Slide 23: Understand Geology: Gold Deposits in the Cadillac-Bousquet District
Understand Geology: Gold Deposits in the Cadillac-Bousquet District 23 TSXV:RDS
Slide 24: Learning from the Old Mine: Historic Production
Learning from the Old Mine: Historic Production O’Brien Mine historical production of 587,121 oz 1926 – 1957 1.2M tonnes at 15.25 Au g/t1 1. Technical report on the O’Brien project, Northwestern Québec, Report for NI 43-101, SLR Consulting (Canada) Ltd., March 2, 2023 24 TSXV:RDS
Slide 25: Learning from the Old Mine: Vein Morphology
Learning from the Old Mine: Vein Morphology • Good understanding of vein morphology and continuity from mapping of historic O’Brien workings • At large-scale the veins are continuous, sub-parallel to the stratigraphy and are developed within multiple units of the Piché Group. • Mineral resource esti
Slide 26: Learning from the Old Mine: Vein Morphology
Learning from the Old Mine: Vein Morphology Intersection Intersection Veine 1-NW / Vein 1-SW Veine 9 / Vein 4 Veine 9 Veine 1-NW Veine 4 Veine 1-SW TSXV:RDS 26
Slide 27: Learning from the Old Mine: Grade Continuity
Learning from the Old Mine: Grade Continuity TSXV:RDS 27
Slide 28: Learning from the Old Mine: Grade Continuity
Learning from the Old Mine: Grade Continuity Jewelry Box Stope TSXV:RDS 28
Slide 29: December 9, 2024: 1.35 kg/t Au at Re-Discovered Jewellery Box
December 9, 2024: 1.35 kg/t Au at Re-Discovered Jewellery Box • OB-24-347: 1,345 g/t Au over 1 metre (within 643.1 g/t over 2 metres) • Re-Discovery of Famous O’Brien “Jewelry Box” • Believed to have been the source of O’Brien’s famous museum quality VG specimens Jewelry Box Stope • Mined between 25
Slide 30: Deep Exploration and Growth: O'Brien Exploration Potential
Deep Exploration and Growth: O’Brien Exploration Potential 5.2 Km W WEST O’BRIEN O’BRIEN EAST O’BRIEN E Thompson Cadillac Kewagama Surface 75% of existing Mineral - 250 m Resource 700 m -600m 1750 m - 500 m Trend 100% MRE for PEA,Open 2.2 g/t Au Cutoff Trend 5 - 750 m -900m 4 (US$2,000, 1.2m minimum
Slide 31: Deep Exploration and Growth: 2025 Drill Program
Deep Exploration and Growth: 2025 Drill Program • January 2025: Initial 22,000m drill program expanded by an additional 30-40,000m in May • Total 50-60,000m drill program for the remainder of 2025 and into 2026 • Fully-funded • Targeting deep drilling below existing MRE, below historic mine workings
Slide 32: Deep Exploration and Growth: Proof of Concept Visible Gold
Deep Exploration and Growth: Proof of Concept Visible Gold • As of May 2025, 27 pilot holes and wedges had been completed beneath the historic O’Brien mine and the new Mineral Resources at East O’Brien of which 14 have been published. • Results from 13 holes are pending. • Coarse visible gold has be
Slide 33: Deep Exploration and Growth: Proof of Concept Drill Results
Deep Exploration and Growth: Proof of Concept Drill Results • OB-24-324 is 170 metres below current Mineral Resources at “Trend #1” • On September 24, 2024: OB-24-324 hit 27.61 g/t Au over 6.0 metres, including 102.0 g/t Au over 1.0 metres at 1,100 metres depth • OB-24-337 is the deepest ever hole d
Slide 34: Deep Exploration and Growth: Proof of Concept Continuity
Deep Exploration and Growth: Proof of Concept Continuity S N • The recent deep drilling is Section: also demonstrating Trend #1 continuity of grade and mineralization to depth • This was predicted by the steeply plunging ore- shoots of the historic O’Brien mine • Continuity is being demonstrated ove
Slide 35: Deep Exploration and Growth: Connecting to Base of Historic Mine
Deep Exploration and Growth: Connecting to Base of Historic Mine • April 2, 2025: three new wedges completed and published from OB-337-24 • All four holes intersect mineralization and resolve up to four new veins • Main central vein connects to principal mining stope at the historic mine and is reso
Slide 36: Part C Next Steps
RDS:TSXV Part C Next Steps Matt Manson, President & CEO 36 TSXV:RDS
Slide 37: Next Steps
Next Steps Pursuing Exploration Growth • The PEA is a “Snap-Shot” of a Growing Project • Significant Success with Ongoing Exploration • Focus on Resource Potential below Existing MRE and Historic Mine • Moving to 4 Rigs • Fully Funded 50-60,000m drill program through 2025 and 2026 Pursuing Developme
Slide 38: Contact Information
Contact Information Matt Manson Hubert Parent-Bouchard Kristina Pillon President, CEO & Director Chief Financial Officer Manager, Investor Relations mmanson@radissonmining.com hpbouchard@radissonmining.com kpillon@radissonmining.com Radisson Mining Resources Inc. 50 rue du Petit-Canada Rouyn-Noranda
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