Radisson Announces Additional High-Grade Drill Results at O'Brien Including 23.37 g/t Au over 4.0 Metres and the Deepest Intercept to Date
Radisson Announces Additional High-Grade
Drill Results at O'Brien Including 23.37 g/t Au
over 4.0 Metres and the Deepest Intercept to
Date
Rouyn-Noranda, Quebec--(Newsfile Corp. - January 27, 2026) -
Radisson Mining Resources Inc.
(TSXV: RDS) (OTCQX: RMRDF)
("
Radisson
" or the "Company") is pleased to announce assay
results from seven new drill holes completed at its 100%-owned O'Brien Gold Project ("
O'Brien
" or the
"
Project
") located in the Abitibi region of Québec. The seven holes are the latest completed as part of
the Company's ongoing 140,000-metre step-out drill program designed to test the overall scope of gold
mineralization at the Project (see
Radisson news release dated October 16, 2025
). Three separate and
equally significant results are contained within the new data (summarized below, and in Figure 1):
1. Broad Mineralized Zones with High-Grade Vein Intercepts at "Trend #1", Extending New
Mineralization to 1,450 Metres Vertical Depth, 375 Metres Below the Existing Mineral
Resources
OB-25-322W3 intersected 23.37 grams per tonne ("g/t") gold ("Au") over 4.0 metres (core length)
including 60.60 g/t Au over 1.5 metres
and
2.50 g/t Au over 19.0 metres including 4.94 g/t Au over
1.5 metres and including 3.93 g/t Au over 3.0 metres;
OB-25-322W4 intersected 2.37 g/t Au over 11.5 metres including 10.89 g/t Au over 1.0 metre;
2. Completion of Final 14
th
and 15
th
Wedges from Pilot Hole OB-24-337, Continuing the
Delineation of New Mineralization in Multiple Veins Beneath the Historic Mine Workings
OB-25-337W15 intersected 5.38 g/t Au over 4.5 metres including 8.86 g/t Au over 1.5 metres;
OB-25-337W14 intersected 1.49 g/t Au over 16.1 metres including 4.26 g/t Au over 1.5 metres
and including 3.37 g/t Au over 1.5 metres;
3. Deepest Ever Intercept Beneath the Historic Mine with a New, Deep Pilot Hole Extending
Mineralization to 1,620 Metres Vertical Depth and Providing Platform for Further Drilling
OB-25-378 intersected 15.70 g/t Au over 1.1 metres;
Matt Manson, President and CEO:
"This latest batch of drill assays from O'Brien contain notable
results from several areas of focus in our 140,000 metre step-out drill program. We continue to push
the limits of known mineralization at O'Brien outwards and downwards. Two wedges completed from
drill hole OB-24-322 demonstrate more characteristic zones of broad and mineralized alteration with
high-grade quartz-sulphide-gold veins, pushing the known extents of the Project's "Trend #1" to a new
depth extent of 1,450 metres. Beneath the historic O'Brien Mine, we have been reporting for the past
12 months the progressive delineation of a broad system of high-grade veins showing good continuity
with the former mine workings above. The final two wedges drilled from the pilot hole OB-24-337 have
also successfully intercepted these veins with reliable consistency. In fact, each of the fifteen wedges
drilled from this pilot hole have returned vein intercepts with grades and thicknesses consistent with
the Project's mineral resources: a 100% success rate in this developing area. Now, new pilot hole OB-
25-378, representing a step-down in depth again, has intercepted further, multiple mineralized zones
and high-grades, pushing this area of gold mineralization down to 1,620 metres vertical depth, the
deepest intercepts yet achieved at the Project. We have not yet found the bottom of the O'Brien gold
system. Six rigs are active at the Project site, with two more rigs mobilizing shortly."
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
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/10977/281737_74e08c8d6491c912_001full.jpg
Table 1:
Assay Results from Select Drill Holes
DDH
Zone
From
(m)
To
(m)
Core
Length
(m)
Au g/t -
Uncut
Host Lithology
OB-25-322W3
Trend #1
1,379.5
1,381.0
1.50
3.24
V3-S
1,443.5
1,444.8
1.30
5.31
POR-S
1,472.0
1,491.0
19.00
2.50
S1p/POR-N
Including
1,477.0
1,478.5
1.50
4.94
S1p
Including
1,484.5
1,487.5
3.00
3.93
S1p
1,531.0
1,535.0
4.00
23.37
POR-N/V3-N
Including
1,532.5
1,534.0
1.50
60.60
POR-N/V3-N
OB-25-322W4
Trend #1
1,250.0
1,251.5
1.50
3.85
V3-S
1,341.5
1,353.0
11.50
2.37
POR-S
Including
1,347.5
1,348.5
1.00
10.89
POR-S
OB-25-337W14
O'Brien Mine East
1,206.0
1,210.0
4.00
3.13
V3-S
1,209.0
1,210.0
1.00
4.70
V3-S
1,215.4
1,231.5
16.10
1.49
POR-S/V3-CEN
Including
1,218.0
1,219.5
1.50
4.26
POR-S/V3-CEN
Including
1,225.5
1,227.0
1.50
3.37
POR-S/V3-CEN
1,237.5
1,240.3
2.80
3.81
V3-CEN
1,239.0
1,240.3
1.30
7.11
V3-CEN
1,272.0
1,273.5
1.50
8.48
S1p
OB-25-337W15
O'Brien Mine East
1,247.0
1,251.0
4.00
5.11
V3-CEN
1,248.0
1,249.0
1.00
9.84
V3-CEN
1,306.0
1,310.5
4.50
5.38
V3-N
Including
1,307.5
1,309.0
1.50
8.86
V3-N
OB-25-377W1
O'Brien Mine West
1,204.9
1,214.3
9.40
3.48
V3-CEN
Including
1,206.4
1,210.7
4.30
5.92
V3-CEN
1,224.9
1,226.0
1.10
3.00
V3-CEN / S1p
1,243.0
1,245.0
2.00
4.74
S1p
Including
1,244.0
1,245.0
1.00
6.44
S1p
OB-25-377W2
O'Brien Mine West
1,302.0
1,303.0
1.00
8.09
POR-N
1,327.7
1,329.8
2.10
3.67
V3-N
OB-25-378
O'Brien Mine East
1,665.5
1,667.0
1.50
3.07
POR-S
1,673.8
1,674.9
1.10
15.70
POR-S
1,681.3
1,682.3
1.00
3.47
POR-S
1,702.6
1,704.0
1.40
3.26
V3-CEN
Notes on Calculation of Drill Intercepts:
The O'Brien Gold Project Mineral Resource Estimate effective May 6, 2025 ("MRE") utilizes a 2.20 g/t Au bottom cut-off, a US$2,000 gold price, a
minimum mining width of 1.2 metres, and a 40 g/t Au upper cap on composites. Intercepts presented in Table 1 are calculated with a 3.00 g/t Au
bottom cut-off. True widths, based on depth of intercept and drill hole inclination, are estimated to be 30-80% of core length. Table 2 presents
additional drill intercepts calculated with a 1.00 g/t bottom cut-off over a minimum 1.0 metre core length so as to illustrate the frequency and
continuity of mineralized intervals within which high-grade gold veins at O'Brien are developed. 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.
Gold Mineralization at O'Brien
Gold mineralizing quartz-sulphide veins at O'Brien occur within a thin band of interlayered mafic volcanic
rocks, conglomerates, and porphyritic andesitic sills of the Piché Group occurring in contact with the
east-west oriented Larder Lake-Cadillac Break ("LLCB"). Gold, along with pyrite and arsenopyrite, is
typically associated with shearing and a pervasive biotite alteration, and developed within multiple Piché
Group lithologies and, occasionally, the hanging-wall Pontiac and footwall Cadillac meta-sedimentary
rocks.
As mapped at the historic O'Brien mine, and now replicated in the modern drilling, individual veins are
generally narrow, ranging from several centimetres up to several metres in thickness. Multiple veins
occur sub-parallel to each other, as well as sub-parallel to the Piché lithologies and the LLCB. Individual
veins have well-established lateral continuity, with steeply plunging grade shoots developed over
significant lengths. Based on the historic data available, it is clear that the former mine was "high-
graded", with mining focussed on a main central stope and parallel veins identified but left undeveloped.
The historic O'Brien mine produced over half a million ounces of gold from such veins and shoots at an
average grade exceeding 15 g/t Au and over a vertical extent of at least 1,000 metres. Modern
exploration has focussed on delineating well developed vein mineralization to the east of the historic
mine, with additional high-grade shoots becoming evident in the exploration data over what has been
described as a series of repeating trends ("Trend #s 0 to 5").
Figure 2:
Deep Step-Out Drill Holes Completed and/or Published by the Company since December
2024
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/10977/281737_74e08c8d6491c912_003full.jpg
Step-Out Drilling at O'Brien
Since the end of 2024, Radisson has been pursuing a program of broad step-outs beneath the historic
O'Brien Gold mine and the existing mineral resources designed to test the extent of mineralization at the
Project. This drilling is accomplished with pilot holes followed by wedges and directional drilling to
maximize drill efficiency. On October 16, 2025, Radisson announced the expansion of the step-out drill
program to 140,000 metres employing an eventual eight drill rigs. Since this program began, 84% of
completed drill holes have intersected gold mineralization with grades and core-lengths consistent with
the Project's Mineral Resources (Table 2).
Table 2
: Drill Results Published for the O'Brien Gold Project since December 2024
Date of Publication
Total Number of Drill Holes
Drill Holes with
Intercepts >+3g/t
Success Rate (%)
January 27
th
, 2026
7
7
100%
January 6
th
, 2026
6
5
83%
28th October 2025
15
13
87%
8th September, 2025
15
13
87%
16th July 2025
14
11
79%
2nd April 2025
3
3
100%
26th February 2025
20
15
75%
16th December 2024
1
1
100%
Total
81
68
84%
The origin of the step-out drill program was the deep pilot hole OB-24-337, which was the first
exploration drill hole located below the former mine workings since mining ended in 1957. This hole
intersected 31.24 g/t Au over 8.0 metres, including 242.0 g/t Au over 1.0 metre at approximately 1,500
metres vertical depth (see
Radisson news release dated December 16, 2024
). With today's results, a
full complement of assay results from all fifteen wedges drilled from OB-24-337 have now been reported
and up to eight gold-bearing veins have been delineated. Drilling in this area will now focus on new pilot
hole OB-25-378 which has been successfully completed to a vertical depth of 1,740 metres. This hole
has returned multiple zones of alteration and gold mineralization, showing continuity with the multiple-vein
system modelled above, and a high-grade vein intercept of 15.70 g/t Au over 1.1 metres at 1,620 metres
vertical depth, the deepest intercept ever returned at the Project. Taken together, the results extend the
area of new mineralization beneath the historic mine workings to approximately 250 metres (east-west)
by 600 metres (vertical). Drilling of the first wedge from pilot hole OB-25-378 is currently underway.
Today's release includes drill assays from two wedges completed from pilot hole OB-24-322 testing the
downward extension of the Project's "Trend #1". Both wedges returned broad zones of mineralized
alteration with high-grade vein intercepts, including OB-25-322W3 with 23.37 g/t Au over 4.0 metres
including 60.60 g/t Au over 1.5 metres. Recall that drilling in this area has returned similarly high-grade
intercepts, including OB-24-324 with 27.61 g/t Au over 6.0 metres including 102.0 g/t Au over 1.1 metres
and
6.83 g/t Au over 10.0 metres including 40.2 g/t Au over 1.5 metres, and the OB-24-322 pilot hole
itself which returned 8.75 g/t Au over 5.2 metres including 27.2 g/t Au over 1.4 metres (Figure 3 and
Radisson news release dated September 24, 2024
). These results, taken together, have extended gold
mineralization at Trend #1 to 1,450 metres vertical depth, 375 metres below the current Mineral
Resources.
Today's release also includes results from two wedges from pilot hole OB-25-377 located between the
western and eastern portions of the former mine (Figure 1). These holes have returned multiple zones of
mineralization, such as OB-25-377W1 with 3.48 g/t Au over 9.4 metres including 5.92 g/t Au over 4.3
metres. This area had previously been thought to have lower potential for new mineral resources, given
the absence of mining stopes above. The new intercepts illustrate the broad extent of the O'Brien gold
mineralizing system and the high-grading nature of the former mine.
Figure 3
: Vertical Cross Section through "Trend #1 with Pilot Holes OB-24-322 and 324, and Wedges
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/10977/281737_74e08c8d6491c912_004full.jpg
Table 3
: Detailed Assay Results (see "Notes on Calculation of Drill Intercepts")
DDH
Zone
From
(m)
To
(m)
Core
Length
(m)
Au g/t -
Uncut
Host Lithology
1,379.5
1,381.0
1.50
3.24
V3-S
1,440.5
1,444.8
4.30
2.48
POR-S
OB-25-322W3
Trend #1
Including
1,443.5
1,444.8
1.30
5.31
POR-S
1,472.0
1,491.0
19.00
2.50
S1p/POR-N
Including
1,477.0
1,478.5
1.50
4.94
S1p
Including
1,484.5
1,487.5
3.00
3.93
S1p
1,531.0
1,535.0
4.00
23.37
POR-N/V3-N
Including
1,532.5
1,534.0
1.50
60.60
POR-N/V3-N
1,538.2
1,539.5
1.30
1.28
S3p
OB-25-322W4
Trend #1
1,247.0
1,251.5
4.50
2.57
V3-S
Including
1,250.0
1,251.5
1.50
3.85
V3-S
1,334.0
1,335.5
1.50
1.55
POR-S
1,341.5
1,353.0
11.50
2.37
POR-S
Including
1,347.5
1,348.5
1.00
10.89
POR-S
1,360.2
1,364.2
4.00
1.10
POR-S
1,377.5
1,383.5
6.00
1.28
S1p
1,405.0
1,406.5
1.50
1.40
POR-N
OB-25-337W14
O'Brien Mine East
1,109.0
1,110.5
1.50
3.06
PON-S3
1,188.0
1,189.5
1.50
1.24
V3-S
1,195.5
1,197.0
1.50
1.81
V3-S
1,206.0
1,210.0
4.00
3.13
V3-S
Including
1,209.0
1,210.0
1.00
4.70
V3-S
1,215.4
1,231.5
16.10
1.49
POR-S/V3-CEN
Including
1,218.0
1,219.5
1.50
4.26
POR-S/V3-CEN
Including
1,225.5
1,227.0
1.50
3.37
POR-S/V3-CEN
1,237.5
1,240.3
2.80
3.81
V3-CEN
Including
1,239.0
1,240.3
1.30
7.11
V3-CEN
1,264.5
1,266.0
1.50
1.05
S1p
1,272.0
1,273.5
1.50
8.48
S1p
1,283.3
1,284.8
1.50
2.09
TX
1,328.0
1,329.5
1.50
2.58
S3p
OB-25-337W15
O'Brien Mine East
1,239.0
1,240.1
1.10
1.11
POR-S
1,247.0
1,251.0
4.00
5.11
V3-CEN
Including
1,248.0
1,249.0
1.00
9.84
V3-CEN
1,282.5
1,284.0
1.50
1.06
S1p
1,293.0
1,294.0
1.00
1.13
POR-N
1,296.0
1,297.4
1.40
1.74
POR-N
1,298.9
1,300.0
1.10
1.34
V3-N
1,306.0
1,310.5
4.50
5.38
V3-N
Including
1,307.5
1,309.0
1.50
8.86
V3-N
OB-25-377W1
O'Brien Mine West
1,196.9
1,197.9
1.00
1.44
V3-CEN
1,204.9
1,214.3
9.40
3.48
V3-CEN
Including
1,206.4
1,210.7
4.30
5.92
V3-CEN
1,222.0
1,227.5
5.50
1.94
V3-CEN / S1p
Including
1,224.9
1,226.0
1.10
3.00
V3-CEN / S1p
1,235.0
1,236.5
1.50
2.80
S1p
1,243.0
1,245.0
2.00
4.74
S1p
Including
1,244.0
1,245.0
1.00
6.44
S1p
1,249.0
1,250.0
1.00
1.18
S1p
1,271.5
1,272.7
1.20
1.30
V3-N
OB-25-377W2
O'Brien Mine West
1,206.6
1,210.5
3.90
1.76
POR-S / V3-CEN
1,291.0
1,296.0
5.00
1.10
S1p
1,297.4
1,304.5
7.10
2.03
POR-N
Including
1,302.0
1,303.0
1.00
8.09
POR-N
1,327.7
1,333.5
5.80
1.97
V3-N
Including
1,327.7
1,329.8
2.10
3.67
V3-N
OB-25-378
O'Brien Mine East
1,653.0
1,654.5
1.50
1.10
POR-S
1,664.0
1,667.0
3.00
2.14
POR-S
Including
1,665.5
1,667.0
1.50
3.07
POR-S
1,673.8
1,674.9
1.10
15.70
POR-S
1,681.3
1,689.9
8.60
1.15
POR-S
Including
1,681.3
1,682.3
1.00
3.47
POR-S
1,701.5
1,704.0
2.50
2.40
V3-CEN
Including
1,702.6
1,704.0
1.40
3.26
V3-CEN
1,713.5
1,715.0
1.50
3.47
S1p
1,746.5
1,748.0
1.50
2.01
TX
Table 4
: Drill Hole Collar Information for Holes contained in this News Release HELLO
DDH
Zone
Easting
Northing
Azimuth
Dip
Hole Length (m)
OB-25-322W3
Trend #1
694199
5345098
0
-85.0
687.0
OB-25-322W4
Trend #1
694199
5345098
0
-85.0
650.0
OB-25-337W14
O'Brien Mine East
693700
5345070
346
-79.5
460.0
OB-25-337W15
O'Brien Mine East
693700
5345070
346
-79.5
476.0
OB-25-377W1
O'Brien Mine West
693272
5345054
345
-79.5
686.0
OB-25-377W2
O'Brien Mine West
693272
5345054
345
-79.5
710.0
OB-25-378
O'Brien Mine East
693640
5345014
357
-83.0
1820.0
Notes:
Hole lengths for wedges represent meterage from point of wedge. Drill holes OB-24-322 and OB-24-337 were completed in 2024 while their wedge
branches were drilled in 2025.
QA/QC
All drill cores in this campaign are NQ in size. Assays were completed on sawn half-cores, with the
second half kept for future reference. The samples were analyzed using standard fire assay procedures
with Atomic Absorption (AA) finish at ALS Laboratory Ltd, in Val-d'Or, Québec. Samples yielding a
grade higher than 10 g/t Au were analyzed a second time by fire assay with gravimetric finish at the
same laboratory. Mineralized zones containing visible gold were analyzed with metallic sieve procedure.
Standard reference materials, blank samples and duplicates were inserted prior to shipment for quality
assurance and quality control (QA/QC).
Starting in December 2025, Radisson's drill core samples have been sent to MSALABS's analytical
laboratory located in Val-d'Or, Québec, for preparation and gold analysis. The entire sample is dried and
crushed (70% passing a 2-millimeter sieve) and split to 500 g. The analysis for gold is performed on an
approximately 500 g aliquot using Chrysos Photon Assay™ technology. Standard reference materials,
blank samples and duplicates were inserted for quality assurance and quality control.
MSALABS and ALS Chemex operate under ISO/IEC 17025 accreditation, utilizing industry-standard
QA/QC frameworks for gold analysis. By integrating blanks, duplicates, and CRMs into their workflows,
both labs adhere to established benchmarks that ensure precise, reliable, and verifiable results.
QP Disclosure
Disclosure of a scientific or technical nature in this news release 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 43-101. Mr. Luke Evans, M.Sc., P.Eng., ing, of SLR Consulting (Canada) Ltd., is the
Qualified Person responsible 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 exploration company focused on its 100% owned O'Brien Gold Project, located in the
Bousquet-Cadillac mining camp along the world-renowned Larder-Lake-Cadillac Break in Abitibi,
Québec. A July 2025 Preliminary Economic Assessment described a low cost and high value project
with an 11-year mine life and significant upside potential based on the use of existing regional
infrastructure. Indicated Mineral Resources are estimated at 0.58 million ounces (2.20 million tonnes at
8.2 g/t Au), with additional Inferred Mineral Resources estimated 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" effective June 27, 2025, and other filings made with
Canadian securities regulatory authorities available at
www.sedarplus.ca
for further details and
assumptions relating to the O'Brien Gold Project. For more information on Radisson, visit our website at
www.radissonmining.com
or contact:
Matt Manson
President and CEO
416.618.5885
Kristina Pillon