GoldHaven Resources Confirms High-Grade Copper Mineralization at Three Guardsmen Project

VANCOUVER, Dec. 09, 2025 - GoldHaven Resources Corp. ("GoldHaven" or the "Company") (CSE: GOH) (OTCQB: GHVNF) (FSE: 4QS) is pleased to announce that assay results from the Three Guardsmen property have confirmed the presence of high-grade surface copper mineralisation on its 100% owned property located in Northern British Columbia.

Highlights:

• 126 surface rock samples collected, including 25 samples exceeding 10,000 ppm (1% Cu).
• High-grade grab samples including:
  • J647161 (15.85% Cu)
  • J647629 (12.75% Cu)
  • J647753 (12.65 % Cu)
    

(Note - grab sample grades are not indicative of expected overall grades)

• The Three Guardsmen Project hosts high-grade copper mineralization in epidote-magnetite skarns, with extensive malachite-stained pods traced over more than 1 km of strike.
• Porphyritic intrusive textures with associated elevated Cu and Mo values have been identified at low elevations in the valley bottom, possibly indicative of an intrusive source for the skarn mineralization.
• Geochemical transitions across the property (Cu-Ag ? Bi-Te-Au ? Mo) suggest a vector towards an intrusive heat source underlying the skarn system.
  
  

Three Guardsmen:

The Three Guardsmen property comprises 14 contiguous mineral tenures covering 16,234 hectares within the Atlin Mining Division of northwestern British Columbia. The claims are 100% owned by GoldHaven Resources Corp. Strategically located near Haines Junction, the Three Guardsmen Project sits in a highly prospective geological area known for copper-magnetite skarns with associated gold and molybdenum mineralization. Observed transitions from copper- and silver-rich zones to bismuth, tellurium, and gold-rich areas, along with molybdenum in altered granites, suggest a possible nearby porphyry system.

Figure 1: Goldhaven Resource team member traverses Three Guardsmen.

Table 1. Top 25 Copper Assays from 126 grab & chip samples from 2025 Field Program.

The 2025 field program at Three Guardsmen concentrated on verifying historical high-grade copper samples located at the Canadian Verdee and Mildred showings as well as doing first pass mapping and assessment on the property. Assay results successfully validated historical sampling, returning new discoveries that include copper grades up to 15.85% Cu (Sample J647161). Of the 126 samples collected, 25 returned assays above 1% Cu, confirming the widespread distribution of mineralization across the property.

Geological Significance:

At the Canadian Verdee high-grade copper occurs in local pods dominated by bornite and chalcocite. These grade along strike into more extensive epidote-dominant skarn with magnetite-chalcopyrite mineralization and widespread malachite staining. These mineralized zones extend over a strike length of more than 1 km, highlighting the scale and potential of the system. The team believes the skarn zones may extend from Canadian Verdee to Mildred for a total of 2.6 km of prospective strike length; cliff side oxidization suggests this is likely, although rugged terrain currently has prevented verification of this.

Figure 2: Len Gal points out additional malachite staining and oxidization between Canadian Verdee and Mildred showings. Suggest of a 2.6 km strike.

Figure 3: Three Guardsmen project (14 contiguous mineral tenures covering 16,234 hectares)

Figure 4: Cu (ppm) Grab and Chip sample Assays at Three Guardsmen from 2025 Field Program.

Importantly, the presence of altered granites carrying molybdenum-along with systematic geochemical transitions from Cu-Ag zones into Bi-Te-Au enrichment-suggests the presence of a nearby porphyry intrusion driving the metal system. The project lies within a Late Cretaceous tectonic setting that hosts several world-class porphyry deposits, including Casino and Red Mountain, further underscoring the exploration potential.

GoldHaven's ongoing exploration strategy includes targeted geochemical surveys, structural mapping, and geophysical interpretation aimed at defining potential mineralized granitic intrusive centres.

Rob Birmingham, CEO of GoldHaven Resources, commented: "These assays are a major milestone for GoldHaven. Discovering copper grades as high as 15.85% at surface, along with widespread high-grade mineralization across the property, clearly shows the strength of the system at Three Guardsmen. This is the kind of early success that can redefine a company. With strong geological evidence pointing toward a nearby porphyry source, we believe the project offers exceptional upside as we continue to advance exploration."

Qualified Person:

The technical and scientific information contained in this news release has been reviewed and approved by Lindsay Bottomer P.Geo. who is a Qualified Person as defined under NI 43-101 and a consultant of the Company.

About GoldHaven Resources Corp.

GoldHaven Resources Corp. is a Canadian junior exploration Company focused on acquiring and exploring highly prospective land packages in North and South America. The Company's projects include (i) the flagship Magno Project, a district-scale polymetallic property adjacent to the historic Cassiar mining district in British Columbia; (ii) the Three Guardsman Project, which exhibits significant potential for copper and gold-skarn mineralization; (iii) the Copeçal Gold Project, a drill-ready gold project located in Mato Grosso, Brazil with a 6km strike of anomalous gold in soil samples; and (iv) three critical mineral projects with extensive tenement packages totaling 123,900 hectares: Bahia South, Bahia North and Iguatu projects located in Brazil.

On Behalf of the Board of Directors

Rob Birmingham, Chief Executive Officer

For further information, please contact:

Rob Birmingham, CEO
www.GoldHavenresources.com
info@goldhavenresources.com
Office Direct: (604) 629-8254

The CSE and Information Service Provider have not reviewed and does not accept responsibility for the accuracy or adequacy of this release.

Forward-Looking Statements

This news release contains "forward-looking information" within the meaning of applicable Canadian securities legislation. Often, but not always, forward-looking information and information can be identified by the use of words such as "plans", "expects" or "does not expect", "is expected", "estimates", "intends", "anticipates" or "does not anticipate", or "believes", or variations of such words and phrases or state that certain actions, events or results "may", "could", "would", "might" or "will" be taken, occur or be achieved. Actual future results may differ materially. In particular, this news release contains forward-looking information relating to the Company and the Property. The forward-looking information reflects management's current expectations based on information currently available and are subject to a number of risks and uncertainties that may cause outcomes to differ materially from those discussed in the forward-looking information. Such risk factors may include, among others, but are not limited to: general economic conditions in Canada and globally; industry conditions, including governmental regulation and environmental regulation; the availability of capital on acceptable terms; the need to obtain required approvals from regulatory authorities; stock market volatility; competition for, among other things, skilled personnel and supplies; incorrect assessments of the value of acquisitions; geological, technical, processing and transportation problems; changes in tax laws and incentive programs; failure to realize the anticipated benefits of acquisitions and dispositions; and the other factors. Although the Company believes that the assumptions and factors used in preparing the forward-looking information are reasonable, undue reliance should not be placed on such information and no assurance can be given that such events will occur in the disclosed time frames or at all. Factors that could cause actual results or events to differ materially from current expectations include: (i) adverse market conditions; and (ii) other factors beyond the control of the Company. New risk factors emerge from time to time, and it is impossible for the Company's management to predict all risk factors, nor can the Company assess the impact of all factors on Company's business or the extent to which any factor, or combination of factors, may cause actual results to differ from those contained in any forward-looking information. The forward-looking information included in this news release are made as of the date of this news release and the Company expressly disclaims any intention or obligation to update or revise any forward-looking information whether as a result of new information, future events or otherwise, except as required by applicable law. Additional information identifying risks and uncertainties that could affect financial results is contained in the Company's filings with Canadian securities regulators, which are available on the Company's profile at www.sedarplus.ca.

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