Rouyn-Noranda, Quebec–( ACN Newswire – October 28, 2025) – Radisson Mining Resources Inc. (TSXV: RDS) (OTCQX: RMRDF) (“Radisson” or the “Company“is pleased to reveal assay arise from fifteen brand-new drill holes finished at its 100%- owned O’Brien Gold Project (“O’Brien” or the “Project“situated in the Abitibi area of Québec. The fifteen holes represent step-outs listed below the existing geological design and the historical O’Brien Gold Mine and become part of a continuous 140,000-metre drill program created to check the total scope of gold mineralization at the Project (see Radisson press release dated October 16, 2025. All holes converged gold mineralization in particular quartz-sulphide-gold veins within modification zones, and thirteen of the holes returned intercepts with grades and densities constant with the Project’s existing mineral resources.
Today’s outcomes consist of considerable intercepts in 3 different step-out areas (Figures 1 & & 2), each of which has significance for the possible future development of the Project’s mineral resources. These are:
In between Trends # 1 and # 2 at 1,000 Metres Vertical Depth
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OB-25-371W5 converged 10.50 grams per tonne (“g/t”gold (“Au”over 6.5 metres, consisting of 14.90 g/t Au over 1.5 metres and consisting of 16.95 g/t Au over 1.0 metre
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OB-25-371W4 converged 11.25 g/t Au over 2.5 metres, consisting of 17.80 g/t Au over 1.5 metres
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OB-25-371W6 converged 4.51 g/t Au over 9.0 metres, consisting of 10.70 g/t Au over 1.5 metres
Below the Historic “O’Brien Mine West” at 1,000 Metres Vertical Depth
- OB-25-376W1 converged 9.16 g/t Au over 2.5 metres, consisting of 14.70 g/t Au over 1.1 metres
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OB-25-376 converged 8.05 g/t Au over 2.50 metres, consisting of 15.75 g/t Au over 1.0 metre
Below the Historic “O’Brien Mine” at 1,100 Metres Vertical Depth
- OB-24-337W11 converged 7.00 g/t Au over 3.0 metres, consisting of 12.60 g/t Au over 1.5 metres, and 13.00 g/t Au over 1.50 metres
Matt Manson, President & & CEO, commented: “Today’s drill results illustrate the extension of classic, high-grade O’Brien gold mineralization across a broad front. We are reporting the first high-grade intercepts beneath the western portion of the historic mine, with drill hole OB-25-376W1 extending mineralization 160 metres below the former mine in this area. Drill hole OB-24-337W11 demonstrates continuity of high-grade mineralization below the main stope of the historic mine. Of particular note, drill holes OB-25-371W4 to W6 returned high-grade mineralization on the western edge of the deep extension of Trend #2, close to the observed extension of Trend #1 (Figures 1&2). This suggests that the apparent gap between these two trends is a function of drill coverage rather than geology, as we have suspected. Closing this gap with new drilling is a priority. With a fully-funded 140,000-metre drill program ongoing and an increase in rigs from the current four to an eventual eight, we are casting a wide net at O’Brien and seeing consistent success.”
Figure 1: Longitudinal Vertical Section and Plan View of Gold Vein Mineralization and Mineral Resources at the O’Brien Gold Project, with Today’s Drill Holes Illustrated
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Notes on Calculation of Drill Intercepts:
The O’Brien Gold Project Mineral Resource Estimate efficient May 6, 2025 (“MRE”uses a 2.20 g/t Au bottom cut-off, a US$ 2,000 gold cost, a minimum mining width of 1.2 metres, and a 40 g/t Au upper cap on composites. Intercepts provided in Table 1 are computed with a 3.00 g/t Au bottom cut-off. Real widths, based upon depth of obstruct and drill hole disposition, are approximated to be 30-80 %of core length. Table 2 presents extra drill intercepts computed with a 1.00 g/t bottom cut-off over a minimum 1.0 metre core length so regarding highlight the frequency and connection of mineralized periods within which top-quality gold veins at O’Brien are established. Lithology Codes: PON-S3: Pontiac Sediments; V3-S, V3-N, V3-CEN: Basalt-South, North, Central; S1P, S3P: Conglomerate; POR-S, POR-N: Porphyry South, North; TX: Crystal Tuff; ZFLLC: Larder Lake-Cadillac Fault Zone.
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Figure 2: Longitudinal Vertical Section of Gold Vein Mineralization and Mineral Resources at the O’Brien Gold Project, with Deep Step-Out Drill Holes Completed and/or Published by the Company given that December 2024.
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Gold Mineralization at O’Brien
Gold mineralizing quartz-sulphide veins at O’Brien happen within a thin band of interlayered mafic volcanic rocks, corporations, and porphyritic andesitic sills of the Piché Group happening in contact with the east-west oriented Larder Lake-Cadillac Break (“LLCB”. Gold, in addition to pyrite and arsenopyrite, is generally related to shearing and a prevalent biotite modification, and established within several Piché Group lithologies and, periodically, the hanging-wall Pontiac and footwall Cadillac meta-sedimentary rocks.
As mapped at the historical O’Brien mine, and now reproduced in the modern-day drilling, specific veins are typically narrow, varying from a number of centimetres as much as numerous metres in density. Several veins happen sub-parallel to each other, in addition to sub-parallel to the Piché lithologies and the LLCB. Specific veins have reputable lateral connection, with near-vertical, top-quality shoots established over substantial lengths. Based upon the historical information readily available, it is clear that the previous mine was “high-graded”with mining concentrated on a primary central stope and parallel veins recognized however left undeveloped.
The historical O’Brien mine produced over half a million ounces of gold from such veins and contends a typical grade surpassing 15 g/t Au and over a vertical level of a minimum of 1,000 metres. Modern expedition has actually concentrated on defining well established vein mineralization to the east of the historical mine, with extra top-quality shoots ending up being apparent in the expedition information over what has actually been referred to as a series of duplicating patterns (“Trend #s 0 to 5”.
Step-Out Drilling at O’Brien
Considering that completion of 2024, Radisson has actually been pursuing a program of broad step-outs below the historical O’Brien Gold mine and the existing mineral resources created to evaluate the degree of mineralization at the Project. This drilling is achieved with pilot holes followed by wedges and directional drilling to optimize drill performance. On October 16, 2025 Radisson revealed the growth of the step-out drill program to 140,000 metres using an ultimate 8 drill rigs.
The origin of the step-out drill program was the deep pilot hole OB-24-337, which was the very first expedition drill hole situated listed below the previous mine functions given that mining ended in 1957. This hole converged 31.24 g/t Au over 8.0 metres, consisting of 242.0 g/t Au over 1.0 metre at roughly 1,500 metres vertical depth (see Radisson press release dated December 16, 2024. With today’s outcomes, assay arise from an overall of 11 wedges from OB-24-337 have actually now been reported and as much as 6 gold-bearing veins have actually been defined over a location of roughly 250 metres (east-west) by 500 metres (vertical). Consisted of in today’s outcomes is the l lth wedge, OB24-337-W11, which converged 7.00 g/t Au over 3.0 metres, consisting of 12.60 g/t Au over 1.5 metres, and 13.00 g/t Au over 1.50 metres roughly 100 metres listed below the last historical mining stope (Figure 1). This serves to show the connection of mineralization from the previous mine downwards towards the cluster formerly released wedges (Figures 1 & & 2; see Radisson press release dated July 16, 2025. Existing drilling in this location is concentrated on infilling with pilot holes and wedge extensions both above and listed below the OB-24-337 pattern of wedge branches to check the complete connection of mineralization from the historical mine to 2 kilometres depth.
Step-out drilling with wedge branches has actually likewise verified top-quality mineralization 170 metres listed below the base of the existing mineral resources at Trend # 1 and 300 metres at Trend # 2. These have actually consisted of pilot hole OB-24-324, which converged 27.61 g/t Au over 6.0 metres at Trend # 1 (see Radisson press release dated October 30, 2024and OB-24-363, which converged 8.41 g/t Au over 2.20 metres, consisting of 14.40 g/t Au over 1.20 metres and 9.07 g/t Au over 1.80 metres, consisting of 12.10 g/t Au over 0.90 metres at Trend # 2 (see Radisson press release outdated September 8, 2025. Today’s outcomes consist of 6 wedges from drill hole OB-25-371, which show highly established, top-quality mineralization on the western edge of the deep extension of Trend # 2. These holes consist of OB-25-371W5, which converged 10.50 g/t Au over 6.5 metres, consisting of 14.90 g/t Au over 1.5 metres and consisting of 16.95 g/t Au over 1.0 metre (Figures 1&& 3). The significance of these holes is that the obvious separation of Trend # 1 and Trend # 2 is based, in part, on an information space triggered by drill rig gain access to limitations and an absence of drilling (Figure 2). Targeting this space and screening for connection of mineralization in between Trends # 1 and # 2, in addition to at depth, is a top priority of the present drill program.
Today’s outcomes likewise consist of the very first drill holes situated listed below the western part of the historical O’Brien Gold Mine, designated “O’Brien Mine West”Just like the primary mining location, no expedition had actually been carried out listed below O’Brien Mine West given that operations ended in 1957. From pilot hole OB-25-376 and wedge branches W1 to W5, 5 holes returned intercepts with grades and densities constant with the Project’s mineral resources, consisting of OB-25-376W1, which converged 9.16 g/t Au over 2.5 metres, consisting of 14.70 g/t Au over 1.1 metres (Figure 1). This now extends gold mineralization at O’Brien Mine West 160 metres listed below the base of the previous mine functions (Figure 4).
Figure 3: Vertical Cross Section through “Trend #2” with Drill Hole Wedges OB-25-371W2 to W6
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Figure 4: Vertical Cross Section through “O’Brien Mine West” with Drill Hole OB-25-376 and Wedges W1 to W5
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QA/QC
All drill cores in this project are NQ in size. Assays were finished on sawn half-cores, with the 2nd half kept for future recommendation. The samples were evaluated utilizing basic fire assay treatments with Atomic Absorption (AA) surface at ALS Laboratory Ltd, in Val-d’Or, Quebec. Samples yielding a grade greater than 10 g/t Au were examined a 2nd time by fire assay with gravimetric surface at the very same lab. Mineralized zones including noticeable gold were evaluated with metal screen treatment. Requirement recommendation products, blank samples and duplicates were placed prior to delivery for quality control and quality assurance (QA/QC) program.
Certified Persons
Disclosure of a clinical or technical nature in this press release was prepared under the guidance of Mr. Richard Nieminen, P.Geo, (QC), a geological expert for Radisson and a Qualified Person for functions of NI 43-101. Mr. Luke Evans, M.Sc., P.Eng., ing, of SLR Consulting (Canada) Ltd., is the Qualified Person accountable for the preparation of the MRE at O’Brien. Each of Mr. Nieminen and Mr. Evans is independent of Radisson and the O’Brien Gold Project.
About Radisson Mining
Radisson is a gold expedition business concentrated on its 100% owned O’Brien Gold Project, situated in the Bousquet-Cadillac mining camp along the world-renowned Larder-Lake-Cadillac Break in Abitibi, Québec. A July 2025 Preliminary Economic Assessment explained a low expense and high worth task with an 11-year mine life and substantial upside possible based upon using existing local facilities. Suggested Mineral Resources are approximated at 0.58 million ounces (2.20 million tonnes at 8.2 g/t Au), with extra Inferred Mineral Resources approximated at 0.93 million ounces (6.67 million tonnes at 4.4 g/t Au). Please see the NI 43-101 “O’Brien Gold Project Technical Report and Preliminary Economic Assessment, Québec, Canada” efficient June 27, 2025, and other filings made with Canadian securities regulative authorities offered at www.sedarplus.ca for more information and presumptions connecting to the O’Brien Gold Project. To learn more on Radisson, visit our site at www.radissonmining.com or contact:
Positive Statements
This press release includes “forward-looking information” within the significance of the appropriate Canadian securities legislation that is based upon expectations, quotes, forecasts, and analyses as at the date of this press release. Positive declarations consisting of, however are not restricted to, declarations with regard to the capability to perform the Company’s strategies connecting to the O’Brien Gold Project as set out in the Preliminary Economic Assessment; the Company’s capability to finish its scheduled expedition and advancement programs; the lack of negative conditions at the O’Brien Gold Project; the lack of unanticipated functional hold-ups; the lack of product hold-ups in acquiring essential licenses; the rate of gold staying at levels that render the O’Brien Gold Project rewarding; the Company’s capability to continue raising needed capital to fund its operations; the capability to recognize on the mineral resource and mineral reserve price quotes; presumptions relating to present and future service techniques; regional and international geopolitical and financial conditions and the environment in which the Company runs and will run in the future; prepared and continuous drilling; the significance of drill outcomes; the capability to continue drilling; the effect of drilling on the meaning of any resource; and the capability to include brand-new drilling in an upgraded technical report and resource modelling; the Company’s capability to grow the O’Brien Gold Project; and the capability to transform presumed mineral resources to suggested mineral resources.
Any declaration that includes conversations with regard to forecasts, expectations, analyses, beliefs, strategies, forecasts, goals, presumptions, future occasions or efficiency (frequently however not constantly utilizing expressions such as “expects”or “does not expect” “is expected” “interpreted” “management’s view” “anticipates” or “does not anticipate” “plans” “budget” “scheduled” “forecasts” “estimates” “believes” or “intends” or variations of such words and expressions or specifying that specific actions, occasions or outcomes “may” or “could” “would” “might” or “will” be required to take place or be attained) are not declarations of historic truth and might be positive info and are meant to determine positive details. Other than for declarations of historic truth associating with the Company, specific details consisted of herein makes up positive declarations Forward-looking details is based upon price quotes of management of the Company, at the time it was made, includes recognized and unidentified threats, unpredictabilities and other elements which might trigger the real outcomes, efficiency or accomplishments of the business to be materially various from any future outcomes, efficiency or accomplishments revealed or suggested by such positive details. Such aspects consist of, to name a few; the threat that the O’Brien Gold Project will never ever reach the production phase (consisting of due to an absence of funding); the Company’s capital requirements and access to financing; modifications in legislation, policies and accounting requirements to which the Company is subject, consisting of ecological, health and wellness requirements, and the effect of such legislation, guidelines and requirements on the Company’s activities; cost volatility and accessibility of products; instability in the worldwide monetary system; the impacts of high inflation, such as greater product rates; the threat of any future lawsuits versus the Company; modifications in job criteria and/or financial evaluations as strategies continue to be improved; the danger that real expenses might go beyond approximated expenses; geological, mining and expedition technical issues; failure of plant, devices or procedures to run as expected; mishaps, labour conflicts and other threats of the mining market; hold-ups in getting governmental approvals or funding; threats associating with the drill results at O’Brien; the significance of drill outcomes; and the capability of drill results to precisely forecast mineralization. The positive info included in this news release is based upon what management thinks, or thought at the time, to be affordable presumptions, the celebrations can not guarantee investors and potential buyers of securities that real outcomes will be constant with such positive details, as there might be other elements that trigger results not to be as prepared for, approximated or planned, and neither the Company nor any other individual presumes duty for the precision and efficiency of any such positive details. The Company thinks that this positive info is based upon sensible presumptions, however no guarantee can be considered that these expectations will show to be proper and such positive declarations consisted of in this news release need to not be unduly trusted. The Company does not carry out, and presumes no responsibility, to upgrade or modify any such positive declarations or positive details consisted of herein to show brand-new occasions or scenarios, other than as might be needed by law. These declarations speak just since the date of this press release.
Please describe the “Risks and Uncertainties Related to Exploration” and the “Risks Related to Financing and Development” areas of the Company’s Management’s Discussion and Analysis dated April 29, 2025 for the year ended December 31, 2024, and the Company’s Management’s Discussion and Analysis outdated August 27, 2025 for the three-month duration ended June 30, 2025, all of which are readily available digitally on SEDAR+ at www.sedarplus.ca All positive declarations included in this news release are specifically certified by this cautionary declaration.
Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is specified in the policies of the TSX Venture Exchange) accepts obligation for the adequacy or precision of this press release. No stock market, securities commission or other regulative authority has actually authorized or disapproved the info consisted of herein.
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Subject: Press release summary
