Radisson Reports Highest-Ever Assay Result at O'Brien: 1,604 g/t (1.60 kg/t) Gold over 1.0 Metre Within 316 g/t Gold over 5.1 Metres
Radisson’s 1,604 g/t Au hit at O’Brien confirms a new, untapped high-grade Pontiac zone and deepens discovery potential beyond resources.
Radisson Mining Resources Inc. (RDS) reported a record-high assay from hole OB-26-385W4, which intersected 316.31 g/t Au over 5.1 m (core length) from the Pontiac Formation. The intercept includes 1,603.95 g/t Au over 1.0 m, marking the highest single assay in the project’s history and exceeding the previous record of 1,345 g/t Au.
The intercept is hosted in Pontiac meta-sedimentary rocks at approximately 823 m downhole, located outside the current mineral resource envelope and defining a potential new, very high-grade zone. Two additional holes were highlighted: OB-26-384W1, which targets deep Trend #1, returned 46.22 g/t over 3.9 m, including 132.28 g/t over 1.3 m, at 1,600-1,700 m vertical depth. OB-26-386W3, located in the Trend 1-Trend 2 gap, cut 8.60 g/t over 2.6 m.
All intercepts are reported with a 3.00 g/t Au bottom cut-off, and true widths are estimated at 30-80% of core length. The step-out program involves 140,000 m with eight rigs, with 92 of 114 holes (81%) having returned greater than 3 g/t Au.
Radisson Mining Resources Inc. (RDS) reported a single spectacular drill hole in a new host rock, expanding its exploration footprint beyond the Piché Group. This discovery potentially opens an entirely new, high-grade target area within the Pontiac sedimentary rocks, which were not previously considered a primary host. If followed up successfully, this could lead to a significant expansion of the resource base outside the current estimate.
The stock had corrected from $1.17 to $0.85 prior to the news. Previously, high-grade intercepts such as the 1,345 g/t hole from the Jewellery Box zone caused a rally in July 2025, with the stock rising from $0.48 to $0.72 in September. However, deep Trend #1 holes drilled to 1,900 m in April 2026 only temporarily lifted the stock, and the subsequent decline suggests the market has become accustomed to high-grade hits. Consequently, while the immediate impact may be positive, it is unlikely to double the share price.
The project is currently in a pre-resource stage for this specific zone, though the overall project is advanced with a completed Preliminary Economic Assessment (PEA) and substantial resources. The result does not change the existing PEA economics but adds credibility to the exploration target of 3–4 moz. It materially increases the potential for additional high-grade ounces that could improve the future mine plan.
Radisson Mining Resources Inc. is a Canadian junior explorer focused on the 100%-owned O’Brien Gold Project in the Abitibi region of Québec, located along the prolific Larder Lake-Cadillac Break. The project hosts an orogenic gold vein system that historically produced over 500,000 oz at >15 g/t Au. Modern resources as of March 2026 include 628 koz indicated (3.49 Mt @ 5.59 g/t) and 1,692 koz inferred (10.37 Mt @ 5.08 g/t).
A July 2025 Preliminary Economic Assessment outlined an 11-year underground mine using toll milling at IAMGOLD’s Doyon mill, yielding an after-tax NPV 5% of C$532 M (48% IRR) at US$2,550/oz gold. The company is currently executing a 140,000 m step-out drill program, funded by recent financings totalling C$37 M in 2025 and a further C$25 M flow-through in May 2026, to test mineralization to 2-2.5 km depth. Other assets include the New Alger property for grassroots exploration and royalty interests.