Onyx Gold Expands Argus North Discovery Footprint – 208 m of two.3 g/t Au, Together with 25 m of 5.2 g/t Au

Greatest Intersection to Date from Argus North

Onyx Gold Corp. (TSXV: ONYX,OTC:ONXGF) (OTCQX: ONXGF) (“Onyx” or the “Firm”) is happy to report one other robust drill intercept from the Argus North Zone (“Argus North”) as a part of the Firm’s ongoing drill program (the “Program”) at its 100%-owned Munro-Croesus Venture (“Munro-Croesus” or the “Venture”), situated 75 km east of Timmins, Ontario.

The newest outcomes come from gap MC25-232, which was designed to check a newly outlined northeast-trending structural hall beneath the Argus North outcrop. This goal emerged from detailed geological mapping and floor channel sampling that indicated a powerful structural management on higher-grade gold distribution (see information launch dated October 7, 2025). MC25-232 efficiently confirmed this interpretation, delivering the widest steady interval of gold mineralization encountered at Argus North to this point, returning 208.0 meters (“m”) grading 2.3 grams per tonne gold (“g/t Au“), whereas extending the southern footprint of the zone by a further 50 metres.

Step-out drilling continues to systematically increase the Argus North mineralized system alongside strike and to depth. Current holes have returned a number of broad and high-grade intercepts (see information releases dated April 10, June 26, July 23, September 3, October 7, and October 22, 2025), together with 69.6 m grading 3.4 g/t Au within the preliminary discovery gap MC25-232.

New Highlights from Argus North

• 208.0 m grading 2.3 g/t Au, in drill gap MC25-232, together with

  • 54.4 m grading 3.3 g/t Au, together with

  • 2.0 m grading 5.5 g/t Au

  • 4.0 m grading 4.3 g/t Au

  • 24.9 m grading 5.2 g/t Au, together with

• Ongoing step-out drilling at Argus North, mixed with mechanical stripping and channel sampling, has continued to show extensive intervals of gold mineralization over >150 meters of strike size and from floor to >350 meters vertically.

• The Argus North Zone stays open alongside strike, down-dip, and down-plunge.

• The Firm has accomplished 81 drill holes to this point (assays introduced for 37 holes) finishing the beforehand introduced 25,000 m Part II drill program and saying a fully-funded 50,000 m Part III drill program using three drill rigs (See Firm information launch dated November 13, 2025).

“The 208 metres intersection grading 2.3 g/t gold in MC25-232 represents one other vital step ahead at Argus North delivering our broadest zone of steady mineralization to this point,” mentioned Brock Colterjohn, President & CEO. “Importantly, these outcomes ship strong gold continuity near floor and extends the system 50 meters to the south, additional demonstrating the size and energy of this rising discovery. The constant mineralization with a number of higher-grade sub-intervals continues to validate our evolving structural interpretation and factors to substantial room for enlargement. With a completely funded further 50,000-metre drill program now underway, we’re effectively positioned to speed up progress at Argus North and to systematically check the broader structural hall throughout the Munro-Croesus Venture.”

Dialogue of 2025 Argus North Drill Outcomes

The Argus North Zone is situated on the western half of the Munro-Croesus Venture, roughly 150 metres north of the regional Pipestone Fault, a significant structural hall that hosts a number of vital gold deposits within the Timmins camp. The invention gap at Argus North, MC24-163, was reported earlier this 12 months, and returned 69.6 m grading 3.4 g/t Au, together with 34.5 m grading 5.4 g/t Au and 9.5 m grading 13.9 g/t Au (see Firm information launch dated April 10, 2025).

Gold mineralization at Argus North is distinguished by each broad zones (50 m to over 100 m) of +1 g/t Au mineralization containing a number of steady higher-grade sub-intervals. Notable current high-grade intercepts embody 17.0 m grading 5.3 g/t Au in gap MC25-168, 18.7 m grading 5.2 g/t Au in MC25-171, 5.2 m grading 5.1 g/t Au and 6.6 m grading 4.2 g/t Au in MC25-178, 4.0 m grading 6.6 g/t Au in MC25-179, and 4.0 m grading 5.9 g/t Au in MC25-180.

Geologically, the high-grade sub-intervals at Argus North are carefully related to zones of robust albitization and silicification, pyritic stringers, and localized porphyritic intrusions inside variolitic basalt and volcanic breccias lower by dominant northeast-trending faults and related fractures. This mixture of alteration and structural preparation is interpreted to be a key management on gold deposition. Drilling to this point demonstrates wonderful vertical continuity of mineralization, now traced from floor to over 350 meters depth, with the system remaining open alongside strike, down-dip and down-plunge.

The evolving interpretation of the potential controls on gold mineralization at Argus North stresses the significance of the next key components:

• Proximity to the main regional, deep-seated Pipestone Fault
• Permissive mafic variolitic volcanic stratigraphy
• Zones of notable magnetic destruction and disruption alongside that key horizon
• Northeast trending buildings and structural-geophysical-geochemical corridors
• Feldspar porphyry intrusions appearing as fluid obstacles and a minor host to gold mineralization; and, most significantly,
• A wide range of breccias (hyaloclastic, crackle, jigsaw, and polylithic) which offer permeability for fluid migration and gold accumulation.

Outcomes reported right now are for one drill gap, MC25-232, which was drilled to the northwest below the Argus North stripped outcrop after detailed geological mapping and floor channel sampling (included 4.0 m grading 5.0 g/t Au and seven.4 m grading 4.9 g/t Au) revealed a powerful northeast-trending structural material as a possible management on gold mineralization. Drill gap MC25-232 intersected the broadest zone of gold mineralization at Argus North with vital highlights together with:

Desk 1 – Vital Assay Outcomes from 2025 Drilling Accomplished on the Argus North Zone

*Intersections are reported as drilled width; true width is unknown.

The intersection in drill gap MC25-232 confirms the mineralization via the center of the Argus North system, but in addition extends the recognized mineralization past drill holes MC25-178 and MC25-163 and an additional 50 m to the south. The northwest drilling orientation higher intersects the northeast-trending buildings and has indicated that the mineralized zones prolong additional south the place these buildings intersect permissive host lithologies.

The Argus North Zone stays open alongside strike, down-dip, and down-plunge and the chance to increase the zone via ongoing drilling is taken into account wonderful. Particulars for drill gap assay reported on this information launch are proven in Determine 1 and Desk 1.

Argus North lies roughly 100 metres north of the east-west trending Argus Principal Zone, which represents a separate 750 m x 200 m near-surface bulk-tonnage gold goal (e.g., 1.0 g/t Au over 63.3 m and 0.5 g/t Au over 136 m).

Determine 1 – Plan Map Highlighting Argus North Zone Drill Holes Reported on this Launch

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Determine 2 – Location of the Munro-Croesus Gold Venture, Ontario

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The Munro-Croesus Venture

The Munro-Croesus Venture is situated alongside Freeway 101 within the coronary heart of the Abitibi greenstone belt, Canada’s premier gold mining jurisdiction (Determine 2). This huge, 100% owned land package deal contains the past-producing Croesus Gold Mine, which yielded a few of the highest-grade gold ever mined in Ontario. In depth land consolidation from 2020-2025 has unified the patchwork of patented and unpatented mining claims surrounding the Croesus Gold Mine into one coherent package deal and enhanced the undertaking’s exploration potential.

The Venture covers 109 km² of extremely potential geology throughout the affect of main gold-bearing structural breaks. Bulk-tonnage gold deposits situated within the rapid area embody the Fenn-Gib gold undertaking being developed by Mayfair Gold Corp., and the Tower Gold Venture being developed by STLLR Gold Inc.

About Onyx Gold

Onyx Gold Corp. is a Canadian exploration firm centered on unlocking district-scale gold alternatives in two of the nation’s most prolific and confirmed mining jurisdictions — Timmins, Ontario, and Yukon Territory.

Within the Timmins Gold Camp, Onyx controls an intensive portfolio anchored by the Munro-Croesus Property, host to the historic high-grade Croesus Mine and website of the Firm’s current Argus North discovery — one of the thrilling new gold zones rising within the camp. Complementing Munro-Croesus are two massive, early-stage initiatives — Golden Mile, a 140 km² property located simply 9 km from Newmont’s multi-million-ounce Hoyle Pond Mine, and Timmins South, a 187 km² land package deal strategically positioned across the Shaw Dome construction, providing distinctive discovery potential.

Past Ontario, Onyx holds a commanding land place throughout 4 properties in Yukon’s Selwyn Basin, an space quickly gaining recognition for brand spanking new gold discoveries and rising exploration funding. The Firm’s King Tut Property sits roughly 50km south of Snowline Gold’s Valley discovery and adjoining to Fireweed Metals’s MacPass property.

Led by an skilled workforce with a powerful observe report of discovery, growth, and worth creation, Onyx Gold (TSXV: ONYX,OTC:ONXGF) (OTCQX: ONXGF) is effectively funded and dedicated to delivering shareholder worth via disciplined exploration, strategic progress, and accountable useful resource growth.

On Behalf of Onyx Gold Corp.

“Brock Colterjohn“
President & CEO

Extra Notes:

Beginning azimuth, dip and remaining size (Azimuth/-Dip/Size) for the one (1) drill gap reported right now are famous as follows: MC25-232 (325/55/366).

Samples of drill core had been lower by a diamond blade rock noticed, with half of the lower core positioned in particular person sealed polyurethane baggage and half positioned again within the authentic core field for everlasting storage. Pattern lengths usually range from a minimal 0.2-meter interval to a most 1.5-meter interval, with a mean 0.5 to 1.0-meter pattern size.

Drill core samples had been delivered by truck in sealed woven plastic baggage had been delivered by truck in sealed woven plastic baggage to MSA Labs laboratory facility in Timmins, Ontario for pattern preparation adopted by the photon assay methodology. MSA Labs function assembly all necessities of Worldwide Requirements ISO/IEC 17025:2017 and ISO 9001:2015. Drill core samples are crushed to 70% passing 2mm, then a consultant cut up is taken and pulverized to 85% passing 75μm. Gold is set by photon assay of a 500-gram pattern offering a real bulk studying. The Chrysos PhotonAssay methodology makes use of excessive vitality x- rays inflicting excitation of atomic nuclei permitting enhanced evaluation for gold.

Coarse rejects returned from MSA Labs and remaining uncut drill core samples had been then delivered by truck in sealed woven plastic baggage to ALS Geochemistry laboratory facility in Timmins, Ontario for pattern preparation with remaining evaluation at ALS Geochemistry Analytical Lab facility in North Vancouver, BC. ALS Geochemistry function assembly all necessities of Worldwide Requirements ISO/IEC 17025:2017 and ISO 9001:2015. Drill core samples are crushed to 70% passing 2mm, then a consultant 250 g riffle cut up is taken and pulverized to 85% passing 75μm. Gold is set by the fire-assay fusion methodology of a 50-gram sub-sample with atomic absorption spectroscopy (AAS). Samples that return values >10 ppm gold from hearth assay and AAS are decided through the use of hearth assay and a gravimetric end. Numerous metals together with silver, gold, copper, lead and zinc are analyzed by inductively coupled plasma (ICP) atomic emission spectroscopy, following multi-acid digestion. The weather copper, lead and zinc are decided by ore grade assay for samples that return values >10,000 ppm by ICP evaluation. Silver is set by ore-grade assay for samples that return >100 ppm. All ALS Geochemistry websites function below a single International Geochemistry High quality Handbook that complies with ISO/IEC 17025:2017. ALS Geochemistry follows the standard administration and operational pointers set out within the worldwide requirements ISO/IEC 17025 – “Normal Requirement for the Competence of Testing and Calibration Laboratories” and ISO 9001 – “High quality Administration Programs”.

The Firm maintains a strong QA/QC program that features the gathering and evaluation of duplicate samples and the insertion of blanks and requirements (licensed reference materials).

Ian Cunningham-Dunlop, P.Eng., Government Vice President for Onyx Gold Corp. and a professional particular person (“QP“) as outlined by Canadian Nationwide Instrument 43-101, has reviewed and accepted the technical data contained on this launch.

Neither TSX Enterprise Change nor its Regulation Providers Supplier (as that time period is outlined within the insurance policies of the TSX Enterprise Change) accepts duty for the adequacy or accuracy of this launch.

Cautionary and Ahead-Trying Statements

Ahead-looking statements embody predictions, projections, and forecasts and are sometimes, however not at all times, recognized by means of phrases akin to “search”, “anticipate”, “imagine”, “plan”, “estimate”, “forecast”, “count on”, “potential”, “undertaking”, “goal”, “schedule”, “price range” and “intend” and statements that an occasion or consequence “might”, “will”, “ought to”, “may” or “may” happen or be achieved and different related expressions and contains the negatives thereof. All statements apart from statements of historic truth included on this launch, together with, with out limitation, statements concerning the potential significance of outcomes from the brand new Argus North discovery are forward-looking statements that contain varied dangers and uncertainties. There may be no assurance that such statements will show to be correct and precise outcomes and future occasions may differ materially from these anticipated in such statements. Ahead-looking statements are based mostly on numerous materials elements and assumptions. Essential elements that would trigger precise outcomes to vary materially from Firm’s expectations embody precise exploration outcomes, adjustments in undertaking parameters as plans proceed to be refined, outcomes of future useful resource estimates, future metallic costs, availability of capital, and financing on acceptable phrases, normal financial, market or enterprise situations, uninsured dangers, regulatory adjustments, defects in title, availability of personnel, supplies, and gear on a well timed foundation, accidents or gear breakdowns, delays in receiving authorities approvals, unanticipated environmental impacts on operations and prices to treatment identical, and different exploration or different dangers detailed herein and every so often within the filings made by the Firm with securities regulators. Though administration of the Firm has tried to establish essential elements that would trigger precise outcomes to vary materially from these contained in forward-looking statements or forward-looking data, there could also be different elements that trigger outcomes to not be as anticipated, estimated, or meant. There may be no assurance that such statements will show to be correct, as precise outcomes and future occasions may differ materially from these anticipated in such statements. Accordingly, readers shouldn’t place undue reliance on forward-looking statements and forward-looking data. Readers are cautioned that reliance on such data will not be applicable for different functions. The Firm doesn’t undertake to replace any forward-looking assertion, forward-looking data or monetary outlook which might be included by reference herein, besides in accordance with relevant securities legal guidelines. We search protected harbor.

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