(MENAFN- GlobeNewsWire - Nasdaq) Returns 4.1 g/t Au (uncut) over 25.8 metres (core length) below current resource

TORONTO, Oct. 27, 2025 (GLOBE NEWSWIRE) -- Wesdome Gold Mines Ltd. (TSX:WDO, OTCQX:WDOFF) (“ Wesdome” or the“ Company”) is pleased to announce a new mineralized zone at the Dubuisson deposit, located east of the Kiena Deep deposit at the Company's 100% owned Kiena Mine Complex in Val-d'Or, Québec.

The new zone has been intersected by drill hole DB-25-068, returning 4.1 g/t Au (uncut) over 25.8 metres (core length). Located approximately 100 metres below, and lateral to, the Dubuisson North Zone and currently interpreted to be between the Dubuisson North and South zones, this new zone represents a compelling opportunity to expand the Dubuisson deposit at depth. The combined grade and thickness are particularly encouraging, as the intercept highlights the potential for future bulk-tonnage mineralization at Kiena.

Highlights

New Dubuisson Zone (Figures 1,2 Table 1) ¹
Drilling confirms a new mineralized zone and resource expansion potential

• Hole DB-25-068: 4.1 g/t Au over 25.8 metres (from 410.4 metres, core length, uncapped)
  Including: 6.1 g/t Au over 6.1 metres (from 412.5 metres, core length, uncapped)
  

Anthea Bath, President and Chief Executive Officer, stated,“This new mineralized zone underscores the strong potential for expansion at the Dubuisson deposit. The intercept's grade, width, and proximity to existing infrastructure – within 350 metres of the Level 33 exploration drift – make it particularly significant. Like the Shawkey South Zone, this area remains completely open at depth and exhibits strong geological similarities to the adjacent Goldex mine. This style of mineralization is particularly exciting as it highlights the potential for bulk-tonnage underground deposits within our land package. While it's still early days, we are beginning to think about how such deposits could augment future production.”

Jono Lawrence, Senior Vice President Exploration and Resources, added,“Wesdome initiated drilling at the diorite-hosted Dubuisson deposit in June, targeting infill and geotechnical holes to support resource conversion within the Dubuisson North and South zones, and we successfully intercepted a new zone late in the summer. As of mid-October, the 2025 drilling campaign has completed 41 holes totaling 11,361 metres drilled. To put this into perspective, only 53 holes had been drilled at Dubuisson in the three years prior to 2025, underscoring both how underexplored this deposit remains and the scale of its untapped potential within the broader Kiena Complex. The results to date continue to demonstrate that the more we drill, the more we find. At least one follow-up hole is planned before the end of the current barge drilling season, with a larger barge-based drilling program scheduled to commence in summer 2026. A more expansive exploration update will be released later in the fourth quarter.”

Technical Details

The Dubuisson deposit currently hosts a probable reserve of 36,400 ounces at 5.8 g/t, an indicated resource of 18,000 ounces at 4.6 g/t Au exclusive of reserves, and an inferred resource of 55,600 ounces at 5.4 g/t Au².

The deposit is characterized by a stacked system of shallow-dipping, quartz-tourmaline veins present within sheared, albite and hematite-altered, subvertical diorite intrusive units, a style of mineralization distinct from that of Kiena Deep. The units trend approximately east-west, dip steeply, and occur in two broad groupings, the Dubuisson North Zone and the Dubuisson South Zone. The diorite units, along with feldspar porphyry dykes, crosscut the deformed ultramafic rocks and schist units that make up most of the host country rock.

Structural observations from drill core and televiewer readings indicate that the veins dip shallowly to the north. The true width of mineralization cannot be estimated due to the number of drill holes completed to date.

The quartz-tourmaline vein-hosted style of mineralization at Dubuisson is geologically similar to that identified through drilling at the Shawkey South Zone, located approximately two kilometres to the southwest, where drill hole S-21-831 intersected 2.3 g/t Au over 72.0 metres (refer to May 23, 2023 press release ). Like Dubuisson, the Shawkey Zone is hosted within a diorite unit, and is located less than two kilometres west of, and along trend from, the Goldex mine intrusive.

A composite estimate returned 4.1 g/t Au over 25.8 metres from 410.4 metres down hole (core length, uncapped). This includes four intervals with grades comparable to, or exceeding, the cut-off grades previously used in resource estimation at the Dubuisson deposit (2.62 g/t Au cut-off; all core length, uncapped):

• 6.1 g/t Au over 6.1 metres at (from 412.5 metres)
• 3.8 g/t Au over 1.9 metres at (from 423.4 metres)
• 8.1 g/t Au over 3.5 metres at (from 428.6 metres)
• 3.6 g/t Au over 2.1 metres at (from 434.1 metres)
  

Applying lower cut-off grades could potentially define a broader mineralized interval.

About Wesdome

Wesdome is a Canadian-focused gold producer with two high-grade underground assets, the Eagle River mine in Ontario and the Kiena mine in Québec. The Company's primary goal is to responsibly leverage its operating platform and high-quality brownfield and greenfield exploration pipeline to build a growing value-driven gold producer.

For Further Information

Raj Gill SVP, Corporate Development & Investor Relations Phone: +1.416.360.3743 E-Mail:...	Trish Moran VP, Investor Relations Phone: +1.416.564.4290 E-mail:...

Technical Disclosure

Analytical work was performed by ALS Minerals of Val-d'Or (Quebec), a certified commercial laboratory (Accredited Lab #689). Sample preparation was completed at ALS Minerals in Val d'Or (Quebec). Assaying comprised fire assay methods with an atomic absorption finish. Any sample assaying >10 g/t Au was re-run using the fire assay method with gravimetric finish, and also with the metallic sieve method. In addition to laboratory internal duplicates, standards, and blanks, the geology department inserts blind duplicates, standards, and blanks into the sample stream at a frequency of one in twenty to monitor quality control. Additionally, blanks are inserted after visible gold is observed to highlight potential contamination between samples.

The technical content of this release has been compiled, reviewed, and approved by Serge Gonthier, P.Geo, Principal Geologist, Resources and Geology for Wesdome, and Breanne Beh, P. Geo., Director Surface and Greenfields Exploration for Wesdome, who are the Company's "Qualified Person" as defined in National Instrument 43-101 - Standards of Disclosure for Mineral Projects.

Forward-Looking Information

This press release contains "forward-looking information" within the meaning of applicable Canadian securities legislation, including but not limited to statements regarding: the opportunity to expand the Dubuisson deposit at depth; the potential for future bulk-tonnage mineralization at Kiena; the planned follow-up hole before the end of the current barge drilling season, along with the larger barge-based drilling program scheduled for 2026; and the result of applying lower cut-off grades to the deposit to potentially define a broader mineralized interval. Forward-looking statements are based on the opinions and estimates of management as of the date such statements are made and they are subject to known and unknown risks, uncertainties, and other factors that may cause the actual results, level of activity, performance or achievements of Wesdome to be materially different from those expressed or implied by such forward-looking statements or forward-looking information. Although management of Wesdome has attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking statements or forward-looking information, there may be other factors that cause results not to be as anticipated, estimated or intended.

There can be no assurance that forward-looking statements or information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. The Company undertakes no obligation to update forward-looking statements if circumstances, management's estimates or opinions should change, except as required by securities legislation. Accordingly, the reader is cautioned not to place undue reliance on forward-looking statements.

APPENDIX

Figure 1. Plan View – Kiena Mine

Figure 2. Dubuisson Zone – Cross-Section (Looking West)

Table 1: Dubuisson Drill Results (Previously Unreleased)

Composite Results
Figures in table may not add due to rounding

Hole No.	From (m)	To (m)	Core Length (m)	Estimated True Width (m)	Grade (g/t Au)	Cut Grade (g/t Au)	Target
DB-25-068	410.4	436.2	25.8	---	4.1	---	New Dubuisson Zone
including	412.5	418.6	6.1	---	6.1	---	New Dubuisson Zone
including	423.4	425.3	1.90	---	3.8	---	New Dubuisson Zone
Including	428.6	432.1	3.50	---	8.1	---	New Dubuisson Zone
including	434.1	436.2	2.10	---	3.6	---	New Dubuisson Zone

Composite estimate based on assay cut-off grade of 2.62 g/t Au, with up to two consecutive sample intervals with assays below 2.62 g/t Au dispersed between the samples with at or higher than cut-off grade values.

Assay Results

Figures in table may not add due to rounding

Hole No.	From (m)	To (m)	Core Length (m)	Grade (g/t Au)	Cut Grade (g/t Au)	Target
DB-25-068	408.4	409.4	1.0	1.7		New Dubuisson Zone
DB-25-068	409.4	410.4	1.0	1.3		New Dubuisson Zone
DB-25-068	410.4	411.5	1.1	5.3		New Dubuisson Zone
DB-25-068	411.5	412.5	1.0	1.8		New Dubuisson Zone
DB-25-068	412.5	413.6	1.1	8.4		New Dubuisson Zone
DB-25-068	413.6	414.7	1.1	2.9		New Dubuisson Zone
DB-25-068	414.7	415.6	0.9	6.6		New Dubuisson Zone
DB-25-068	415.6	416.6	1.0	5.2		New Dubuisson Zone
DB-25-068	416.6	417.5	0.9	11.6		New Dubuisson Zone
DB-25-068	417.5	418.6	1.1	3.0		New Dubuisson Zone
DB-25-068	418.6	419.7	1.1	0.1		New Dubuisson Zone
DB-25-068	419.7	420.7	1.0	0.2		New Dubuisson Zone
DB-25-068	420.7	421.6	0.9	9.5		New Dubuisson Zone
DB-25-068	421.6	422.3	0.7	1.3		New Dubuisson Zone
DB-25-068	422.3	423.4	1.1	0.9		New Dubuisson Zone
DB-25-068	423.4	424.4	1.0	3.5		New Dubuisson Zone
DB-25-068	424.4	425.3	0.9	4.2		New Dubuisson Zone
DB-25-068	425.3	426.3	1.0	2.3		New Dubuisson Zone
DB-25-068	426.3	427.6	1.3	1.0		New Dubuisson Zone
DB-25-068	427.6	428.6	1.0	2.0		New Dubuisson Zone
DB-25-068	428.6	429.8	1.2	17.6		New Dubuisson Zone
DB-25-068	429.8	431.0	1.2	3.0		New Dubuisson Zone
DB-25-068	431.0	432.1	1.1	3.3		New Dubuisson Zone
DB-25-068	432.1	433.0	0.9	0.9		New Dubuisson Zone
DB-25-068	433.0	434.1	1.1	0.4		New Dubuisson Zone
DB-25-068	434.1	435.1	1.0	2.7		New Dubuisson Zone
DB-25-068	435.1	436.2	1.1	4.4		New Dubuisson Zone
DB-25-068	436.2	437.1	0.9	0.4		New Dubuisson Zone
DB-25-068	437.1	438.0	0.9	2.3		New Dubuisson Zone
DB-25-068	438.0	439.1	1.1	0.1		New Dubuisson Zone
DB-25-068	439.1	440.1	1.0	0.0		New Dubuisson Zone
DB-25-068	440.1	440.8	0.7	0.1		New Dubuisson Zone
DB-25-068	440.8	441.4	0.6	0.7		New Dubuisson Zone
DB-25-068	441.4	442.4	1.0	1.0		New Dubuisson Zone
DB-25-068	442.4	443.1	0.7	3.0		New Dubuisson Zone
DB-25-068	443.1	443.8	0.7	0.0		New Dubuisson Zone
DB-25-068	443.8	444.8	1.0	0.1		New Dubuisson Zone
DB-25-068	444.8	445.8	1.0	0.9		New Dubuisson Zone
DB-25-068	445.8	446.3	0.5	0.0		New Dubuisson Zone
DB-25-068	446.3	447.3	1.0	0.0		New Dubuisson Zone
DB-25-068	447.3	448.3	1.0	0.0		New Dubuisson Zone
DB-25-068	448.3	449.3	1.0	0.0		New Dubuisson Zone
DB-25-068	449.3	450.3	1.0	0.0		New Dubuisson Zone
DB-25-068	450.3	451.3	1.0	0.0		New Dubuisson Zone
DB-25-068	451.3	452.3	1.0	0.0		New Dubuisson Zone
DB-25-068	452.3	453.4	1.1	0.1		New Dubuisson Zone
DB-25-068	453.4	454.4	1.0	0.1		New Dubuisson Zone
DB-25-068	454.4	455.0	0.6	1.1		New Dubuisson Zone
DB-25-068	455.0	455.6	0.6	0.1		New Dubuisson Zone
DB-25-068	455.6	456.2	0.6	20.5		New Dubuisson Zone
DB-25-068	456.2	457.0	0.8	0.1		New Dubuisson Zone
DB-25-068	457.0	457.7	0.7	0.1		New Dubuisson Zone
DB-25-068	457.7	458.7	1.0	0.6		New Dubuisson Zone
DB-25-068	458.7	459.3	0.6	1.2		New Dubuisson Zone
DB-25-068	459.3	459.9	0.6	1.8		New Dubuisson Zone
DB-25-068	459.9	460.9	1.0	0.0		New Dubuisson Zone
DB-25-068	460.9	461.9	1.0	0.0		New Dubuisson Zone
DB-25-068	461.9	463.0	1.1	0.1		New Dubuisson Zone
DB-25-068	463.0	464.1	1.1	0.5		New Dubuisson Zone
DB-25-068	464.1	465.2	1.1	1.5		New Dubuisson Zone

*Given that there is no conceptual geological model for Dubuisson Central Zone neither true width nor top cuts were defined.

____________

No top cut or true width defined; down hole composite estimate based on assay cut-off grade of 2.62 g/t Au, with up to two consecutive sample intervals with assays below 2.62 g/t Au dispersed between the higher-grade values.

Refer to March 19, 2025 press release for notes to Mineral Resources and Mineral Reserves.

PDF available:

Photos accompanying this announcement are available at:

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