Vanguard Mining Files First NI 43-101 Technical Report for Redonda, Highlighting Large-Scale Copper-Molybdenum System with Expansion Potential

00:00 Uhr  |  The Newswire

Vancouver, March 27, 2026 - Vanguard Mining Corp. ("Vanguard" or the "Company") (UUU: CSE |UUUFF: OTCID | SL51: Frankfurt) is pleased to announce the completion and filing of its first National Instrument 43-101 ("NI 43-101") Technical Report for the Company's 100%-owned Redonda Copper-Molybdenum Project (the "Project"), located in the Vancouver Mining Division near Campbell River, British Columbia.

This milestone report validates the scale and geological potential of the Redonda Project and underscores the Company's commitment to best practices, technical rigor, and transparency in advancing its exploration activities. The report has been prepared in accordance with the Canadian Securities Administrators' NI 43-101 Standards of Disclosure for Mineral Projects.

The report incorporates results from the Company's 2025-2026 drill campaign, updated geophysical data, and historical drilling completed by Teck Resources Ltd. in 1979.

"This report represents a major milestone for Vanguard," said David Greenway, CEO. "We now have independent confirmation of a large-scale copper-molybdenum system at Redonda, supported by both historical and modern drilling. Importantly, mineralization is strong, consistent, and remains open in multiple directions and may represent the upper portion of a much larger porphyry system. With a clear exploration roadmap and defined targets, we believe Redonda has the potential to evolve into a significant discovery in British Columbia."

Project Location & Geological Setting

The Redonda Project comprises nine mineral claims totaling 2,746.46 hectares on West Redonda Island, approximately 40 km northeast of Campbell River. The property is accessible year-round via barge and supported by established logging infrastructure.

Geologically, Redonda lies within the Coast Suture Zone between the Wrangellia Terrane and the Coast Plutonic Complex. Copper-molybdenum mineralization is associated with a hornblende porphyry dike and breccia zones, consistent with porphyry-style systems observed elsewhere in southwestern British Columbia.

Figure 1: Location of the Redonda Project, Vancouver Mining Division, British Columbia.

Drilling & Exploration Overview

The report integrates multiple exploration phases, including historical drilling, re-assaying of legacy core, and Vanguard's 2023-2026 drill programs, along with airborne geophysical surveys.

Key Highlights from the NI 43-101 Report

1. Large-Scale Mineralized System Defined: Drilling outlines a mineralized footprint exceeding approximately 600 metres in strike, 500 metres in width, and 300 metres vertically.

2. Broad Intervals of Copper-Molybdenum Mineralization: Multiple drill holes intersected long intervals of mineralization, including zones exceeding 100 metres in length with consistent grades.

3. Near-Surface Mineralization Identified: Several drill holes encountered mineralization beginning near surface, supporting favorable exploration geometry.

4. Geological Model Confirmed and Strengthened: Recent drilling supports a multi-phase intrusive and breccia-hosted porphyry system with a mineralized core.

5. Expansion Potential Remains Open: Mineralization remains open at depth and along strike, indicating potential for a larger underlying system.

Disclaimer - Drill Compilation: Management cautions that the presented drill sample results are historical in nature, and Vanguard has not undertaken any independent investigation of the sampling, nor has it independently analyzed the results of previous exploration work to verify the results. Vanguard considers these results relevant for planning future exploration programs. All drill intercepts represent drilled lengths, and insufficient information exists to determine true widths. The technical information is derived from publicly available government sources.

Disclaimer - Initial Exploration Target: The potential quantity and grades are conceptual in nature. There has been insufficient exploration drilling to define a mineral resource, and it is uncertain whether further exploration will result in the delineation of a mineral resource.

Technical Report & Exploration Strategy

The report recommends a two-phase exploration program:

Phase 1:

Induced Polarization (IP) geophysical survey, detailed mapping, and geochemical sampling to refine drill targets.

Phase 2:

Approximately 2,800 metres of diamond drilling across seven holes to test priority targets and expand mineralization.

Figure 2: Diagrammatic Illustration of Conceptual model illustrating the linkages between porphyry and high/low sulphidation epithermal mineralization (from Corbett, 2017)

Conceptual Geological Model

The Redonda Project is interpreted within the context of a porphyry-epithermal system, as illustrated in the conceptual model of Steve Corbett (2017). This model highlights the genetic relationship between deeper porphyry copper-molybdenum mineralization and overlying high- and low-sulphidation epithermal environments. At Redonda, observed features such as multi-phase intrusions, brecciation, quartz stockwork veining, and chalcopyrite-molybdenite mineralization are consistent with the upper levels of a porphyry system. The presence of breccia-hosted mineralization and alteration patterns suggests that the current drilling may be testing the upper portions of a larger hydrothermal system, with potential for a more robust mineralized core at depth. This conceptual framework supports continued exploration targeting both lateral and vertical extensions of the system.

The Redonda Copper-Molybdenum Project Technical Report was prepared by W.B. Lennan, P.Geo., of Port Coquitlam, British Columbia. Mr. Lennan is a Professional Geologist and an Independent Qualified Person as defined under National Instrument 43-101 - Standards of Disclosure for Mineral Projects. The report will be available on the Company's website and filed on SEDAR+.

Mr. Lennan is a registered member of Engineers and Geoscientists British Columbia (Member No. 19,150; Permit to Practice No. 1003445), a Fellow of the Geological Association of Canada (Fellow No. 3445), and a Fellow of the Canadian Institute of Mining, Metallurgy and Petroleum (Fellow No. 94375).

Figure 3: Claim Map and Logging Road Access to Red Claims Showing Area from Redonda Bay

The Redonda Copper-Molybdenum Project Technical Report was prepared by W.B. Lennan, P.Geo., of Port Coquitlam, British Columbia. Mr. Lennan is a Professional Geologist and an Independent Qualified Person as defined under National Instrument 43-101 - Standards of Disclosure for Mineral Projects. The report will be available on the Company's website and filed on SEDAR+.

Mr. Lennan is a registered member of Engineers and Geoscientists British Columbia (Member No. 19,150; Permit to Practice No. 1003445), a Fellow of the Geological Association of Canada (Fellow No. 3445), and a Fellow of the Canadian Institute of Mining, Metallurgy and Petroleum (Fellow No. 94375).

About Redonda

The Redonda Project is a district-scale copper-molybdenum exploration asset comprising 2,746.46 hectares across nine contiguous mineral claims, located approximately 40 km northeast of Campbell River, British Columbia. The property benefits from excellent infrastructure, including year-round barge access and an established network of logging roads, supporting efficient and cost-effective exploration.

Redonda is situated within the highly prospective Coast Suture Zone, a prolific geological corridor known for hosting significant porphyry copper systems in southwestern British Columbia. The Project exhibits key geological features associated with large-scale porphyry deposits, including multi-phase intrusive activity, extensive brecciation, and strong copper-molybdenum mineralization.

Mineralization is centered along a broad hornblende porphyry dike system, where drilling and surface work have identified widespread sulphide mineralization within brecciated zones and stockwork veining. These features, combined with evidence of a robust hydrothermal system, support the interpretation that Redonda may represent the upper portion of a larger porphyry center.

Importantly, the Project shares geological similarities with nearby copper-molybdenum deposits, including OKover and Gambier, reinforcing its potential to host a significant mineralized system. With mineralization open in multiple directions and a growing database of drilling and geophysical data, Redonda represents a compelling exploration opportunity with strong discovery potential.

The Company has established a solid permitting foundation and maintains positive engagement with local First Nations, positioning Redonda for continued advancement through systematic exploration.

Qualified Person

The scientific and technical information contained in this news release has been reviewed and approved by Lawrence Segerstrom, P.Geo., M.SC., MBA, a consulting geologist who is a "Qualified Person" as such term is defined under National Instrument 43-101 - Standards of Disclosure for Mineral Projects ("NI 43-101"). Mr. Segerstrom is not at arm's length to Vanguard and is therefore not independent for the purposes of NI 43-101.

About Vanguard Mining Corp.

Vanguard Mining Corp. is a Canadian mineral exploration company focused on the discovery and development of high-value strategic minerals. The Company is currently advancing uranium exploration projects in the United States and Paraguay, with a focus on identifying and developing assets critical to the global energy transition. Vanguard is committed to responsible exploration and value creation through the acquisition and advancement of highly prospective uranium properties.

All Stakeholders are encouraged to follow the Company on its social media profiles on LinkedIn, X.com, Facebook and Instagram and sign up for updates at Vanguardminingcorp.com

Neither the Canadian Securities Exchange nor its Regulation Services Provider (as that term is defined in the policies of the CSE) accepts responsibility for the adequacy or accuracy of this release.

On Behalf of the Board of Directors

"David Greenway"

David Greenway, CEO

For further information, please contact:

Vanguard Mining Corp.
Brent Rusin
Phone: +1 672-533-0348
E-Mail: brent@vanguardminingcorp.com
Website: vanguardminingcorp.com

Disclaimer for Forward-Looking Information

Certain statements in this news release constitute "forward-looking statements" or "forward-looking information" (collectively, "forward-looking statements") within the meaning of applicable securities laws. Forward-looking statements are statements that are not historical facts and include, but are not limited to, statements regarding beliefs, plans, expectations, intentions, objectives, strategies, future performance, and anticipated events or results. Forward-looking statements are based on management's current expectations, estimates, and assumptions, which may prove to be incorrect, and are subject to known and unknown risks and uncertainties that could cause actual results, performance, or developments to differ materially from those expressed or implied. There can be no assurance that the events anticipated in forward-looking statements will occur, or, if they do, what benefits Vanguard will obtain from them. Factors that could cause actual results to differ materially include, among others, exploration results, availability of financing, commodity prices, permitting and regulatory risks, operating risks, and other risks described in the Company's public disclosure. Forward-looking statements in this release are made as of the date hereof, and Vanguard undertakes no obligation to update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, except as required by applicable securities laws. Readers are cautioned not to place undue reliance on forward-looking statements.

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