07/03/25
Stuhini Highlights High-Grade Tungsten Potential at Ruby Creek
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Vancouver, Canada – July 3, 2025 – Stuhini Exploration Ltd. (the “Company” or “Stuhini”) (TSX-V: STU and OTCQB: STXPF) is pleased to report the results of a comprehensive review of tungsten mineralization at its 100%-owned Ruby Creek Project (“Ruby Creek” or the “Project”), located near Atlin, British Columbia. The review confirms the presence of a high-grade, structurally controlled tungsten system that flanks the Company’s existing 433-million-pound pit-constrained molybdenum deposit. ([1])
Meredith Eades, President and CEO of Stuhini, commented: “Tungsten is increasingly recognized as a strategic metal, essential to both industrial applications and national defense. Our review of the Ruby Creek dataset has confirmed a robust and high-grade tungsten system flanking our existing molybdenum deposit — an opportunity that’s been largely overlooked until now. As we continue our systematic approach to exploration, these results add a new layer of value to Ruby Creek and reinforce our commitment to advancing critical mineral assets that align with future demand.”
Key Highlights
188 rock samples returning >0.1% WO₃, including 40 samples >1% WO₃ and 3 samples >10% WO₃
Tungsten-bearing structures mapped along multiple faults, shears, and veins up to 1.75 metres wide and over 2.9 km in strike
Drill-ready potential supported by historic drill intercepts of:
o 0.15% WO₃ over 27.43 m (GD17-003B), including 0.76% over 3.05 m
o 0.14% WO₃ over 18.29 (GD17-007), including 0.63% over 3.05 m
Channel sampling results from Thor Ridge Trend include:
o 1.35% WO₃ over 1.75 m, including 2.19% WO₃ over 1 m
o Associated gold-silver-copper values: up to 9.27 g/t Au, 225 g/t Ag, and 0.30% Cu ([2])
Tungsten System Overview
Mapping and sampling at Ruby Creek have outlined multiple tungsten-bearing structures forming a broad halo around the Ruby Creek molybdenum deposit. These mineralized structures are associated with northeast-southwest trending faults, veins, and shear zones that range from 0.1 to 1.75 metres thick and extend for hundreds to thousands of metres along strike. Primary tungsten minerals identified include wolframite and scheelite.
A total of 188 samples returned >0.1% WO₃, with 40 samples exceeding 1% WO₃ and 3 returning over 10%. These values occur along well-defined trends, suggesting strong structural control and continuity of mineralization.
Figure 1. Map of Ruby Creek showing tungsten-bearing trends, faults, and mineralized zones.
Multiple tungsten-bearing trends surround the Ruby Creek molybdenum deposit, with samples returning >10% WO₃ along several faults and splays.
Figure 2. Log-scale plot of tungsten assay values by Easting coordinate.
Rock samples show a defined tungsten enrichment halo surrounding the Ruby Creek Mo deposit, with 188 samples >0.1% WO₃ and 40 samples >1% WO₃.
Target Zones and Historical Work
Stuhini’s internal review has outlined seven priority tungsten zones with strike extents from 750 metres to 4.5 kilometres:
In addition, anomalous tungsten in soils (20–500 ppm) suggests further mineralized structures may be present under till and soil cover along strike.
Next Steps
Stuhini plans to follow up with detailed surface mapping and rock sampling to refine targeting across these structures and potentially identify new tungsten-bearing zones. The tungsten system represents a previously under appreciated critical minerals component of the Ruby Creek Project and will be incorporated into future targeting and project advancement plans.
About the Ruby Creek Project
The 29,734-hectare Ruby Creek Project is located approximately 14 km east of Atlin, BC, and is road-accessible. The property hosts the Ruby Creek molybdenum deposit, which contains a measured and indicated pit-constrained resource of 433 million pounds of molybdenum (using US$15/lb Mo and a 0.02% cutoff) and multiple additional mineral occurrences including gold, silver, tungsten, and copper. Stuhini owns 100% of the Ruby Creek Project, subject to a 1% NSR. ([1])
[1] See “Technical Report, Ruby Creek Project, Northern British Columbia, Canada” effective March 10, 2022 and dated April 22, 2022 authored by Steven Ristorcelli, C. P. G., Peter Ronning, P. Eng., Finley Bakker, P. Geo., and John Eggert, P. Eng.
[2] See press release dated January 12, 2022
Qualified Person
Mr. Nicholas Clive Aspinall, M.Sc., P.Eng., is a consulting geologist to Stuhini Exploration and is a “qualified person” as defined by National Instrument 43-101. Mr. Aspinall has verified the data disclosed in this press release, including the sampling, analytical and test data underlying the technical information, and has approved the technical information contained herein. Conversion to WO3% = W% x 1.2616.
About Stuhini Exploration Ltd.
Stuhini is a mineral exploration company focused on exploration and development of precious and base metals properties in western Canada and the southwest United States. The Company’s portfolio of exploration properties includes the flagship Ruby Creek Property, 16 km east of Atlin, BC; the South Thompson Nickel Project, 35 km northwest of Grand Rapids, Manitoba; the Big Ledge Property, 57 km south of Revelstoke, BC
For further information on Stuhini, visit our website at www.stuhini.com or contact:
Meredith Eades
President & CEO
meades@shuhini.com
604.360.4668
Twitter: @STUexploration
LinkedIn: Stuhini Exploration
FORWARD LOOKING STATEMENTS
This news release contains “forward-looking statements” and “forward-looking information” (collectively, “forward-looking statements”) within the meaning of applicable Canadian securities legislation. All statements in this release that are not historical facts are forward-looking statements, including statements regarding the Company’s plans to advance exploration at the Ruby Creek Project, the identification of tungsten-bearing structures with potential for further discovery, the interpretation of assay data, the planned 2025 field program, and the potential for a future multi-zone drill campaign.
These forward-looking statements are based on a number of assumptions, including, without limitation: that the geological interpretations from historical and recent sampling are accurate; that exploration activities will continue as planned and yield results consistent with past findings; that future assay results will confirm the presence and extent of tungsten mineralization; that sufficient financing and technical resources will be available to carry out the Company’s exploration plans; and that the necessary permits and approvals will be obtained in a timely manner.
Forward-looking statements are subject to known and unknown risks, uncertainties and other factors that may cause actual results, performance, or achievements to differ materially from those expressed or implied in such statements. These risks include, but are not limited to: the inherent uncertainty of mineral exploration and development; changes in commodity prices; inaccurate geological interpretations; unanticipated operational or technical difficulties; delays or failure to receive necessary permits; regulatory changes; availability of capital and skilled personnel; and general market and industry conditions.
Although Stuhini believes the expectations expressed in such forward-looking statements are reasonable, such statements involve assumptions, risks, and uncertainties, and undue reliance should not be placed on them. Forward-looking statements are made as of the date of this news release, and the Company does not undertake any obligation to update or revise any forward-looking statements unless required by applicable law.
Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.