Guardian Metal Resources PLC Announces Tempiute Historical Mine Tailings Update
Rhea-AI Summary
Guardian Metal Resources (NYSE.A:GMTL) reported progress at its Tempiute Tungsten Project in Nevada, focusing on historical mine tailings.
The company mapped tungsten-enriched tailings over about 550 acres, staked 193 new claims expanding Tempiute by over 375%, and plans an auger drilling program from June 2026, subject to permits, plus an independent metallurgical study.
Positive
- Historical tungsten-enriched tailings footprint mapped at approximately 550 acres (2.23 km²)
- Mineral rights expanded by staking 193 claims at Tempiute
- Overall Tempiute project footprint increased by over 375%
- Auger drilling program targeted to start June 2026, lasting about three months
- Independent metallurgical study planned to assess tungsten and other metal recovery methods
Negative
- Auger drilling program remains subject to receipt of required permits and approvals
- Tungsten resource tonnage and grade still unquantified pending drilling and studies
- Economic viability of tailings reprocessing not yet established; recovery methods under evaluation
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LONDON / ACCESS Newswire / May 13, 2026 / Guardian Metal Resources PLC (NYSE.A:GMTL)(LON:GMET)(OTCQB:GMTLF), a strategic mineral exploration company focused on tungsten in Nevada, USA, is pleased to announce an update relating to historical mine tailings present at the Company's Tempiute Tungsten Project ("Tempiute" or the "Project") located in south-central Nevada less than 250 miles (402 km) southeast of the Company's Pilot Mountain Tungsten Project. Tempiute, formerly known as the Emerson Tungsten Mine, is a significant past producing tungsten mine, which was originally discovered in 1916 and most recently operated during the 1980s. The Company is evaluating near-term resource and tungsten production opportunities across the extensive former producing mine, with the identification of tailings from decades of historical production adding a compelling new dimension to the Project.
As a critical defense metal, tungsten has been designated as a strategic priority by the U.S. government. Guardian Metal's mission is to establish its co-flagship tungsten projects as the cornerstone of U.S. mined tungsten supply, directly supporting national efforts to re-establish domestic production. This is intended to help the U.S. reduce reliance on foreign supply chains, strengthen economic and defense security, and deliver long-term value for shareholders.
Oliver Friesen, CEO of Guardian Metal, commented:
"Tempiute has a long and well-documented tungsten production history, and we believe the historical tailings represent a unique opportunity warranting further investigation, one that could provide near-term support to the U.S. tungsten supply chain alongside a meaningful reclamation outcome. Our initial assessment has confirmed the presence of tungsten across a substantial surface footprint. As a result we are advancing towards an auger drilling program which will help us better understand the characteristics of the material subsurface.
"With tungsten recognised as a critical defense metal and domestic supply a priority for the U.S. government, this work is very timely. Furthermore we are encouraged by the results of our investigations to date."
HIGHLIGHTS
Guardian Metal is evaluating the potential of recovering tungsten and other metals from the historic tailings at Tempiute, with a view to provide an opportunity for near-term, domestically sourced tungsten in the U.S. | |
Through detailed mapping and sampling, the surface area footprint of historical tungsten-enriched mine tailings at Tempiute (the "Tempiute Tailings") has been determined to cover approximately 550 acres (2.23 km²). | |
As a result, Guardian Metal has expanded its mineral rights position significantly, staking 193 claims and increasing its overall Tempiute footprint by over | |
An auger drilling program is planned to commence in June 2026, subject to receipt of required permits, and will enable characterization of the tailings material and surrounding soils for environmental evaluation and assessment of the tungsten resource potential. | |
The combination of modern recovery methods and elevated tungsten prices makes this an increasingly compelling near-term domestic tungsten supply opportunity, while also offering a meaningful reclamation outcome. | |
Previously milled material sitting at surface, combined with existing on-site infrastructure, means the cost and development timeline of a reprocessing operation could compare favourably to a conventional tungsten mining project, subject to confirmation of sufficient tailings tonnage and grade. |
Background
To determine the economic and environmental remediation potential of historical mine tailings at Tempiute, the Company undertook a detailed mapping and sampling program across the entire historical mine tailings area.
Evaluation of publicly available production records, dating back to the 1930s, was correlated with satellite imagery, spectral analysis, and ground mapping to identify the tailings footprint extending down slope from the Tempiute mine. Follow up ground investigation and surface sampling delineated a large tungsten-enriched zone and confirmed the extent of the historical mine tailings area to cover a surface footprint of approximately 550 acres (2.23 km²). Sampling also provided an initial characterisation of the material, verifying the presence of tungsten and other metals.
As a result, Guardian Metal expanded its mineral rights position significantly, staking 193 mining claims and increasing the overall Tempiute Project footprint by over
Subject to receipt of the required permits, an auger drilling program is planned to commence in June 2026 to characterise the tailings material and surrounding soils for environmental evaluation and resource potential. This work will advance the Company's environmental inquiry and enable determination of the potential for a tungsten resource.
Next Steps
The Company has submitted a Notice to the Bureau of Land Management and the Nevada Division of Environmental Protection for the proposed auger drilling program. Subject to approval, the auger drilling program is targeted to commence in June 2026 and is expected to take approximately three months to complete. The program is designed to allow the Company to make all appropriate inquiries regarding current environmental conditions on site, while estimating the total volume and grade of tungsten and base/precious-metal bearing material present.
In parallel, an independent metallurgical study will be completed to determine the most effective method of recovering tungsten and other metals from the tailings, with results expected in the coming months. This study will also characterize the geochemistry of the tailings post tungsten recovery to inform the final reclamation design of the site.
This announcement contains inside information for the purposes of Article 7 of EU Regulation 596/2014 (which forms part of domestic UK law pursuant to the European Union (Withdrawal) Act 2018). The Directors of the Company are responsible for this announcement.
Forward Looking Statements
This announcement contains forward-looking statements relating to expected or anticipated future events and anticipated results that are forward-looking in nature, and, as a result, are subject to certain risks and uncertainties, including general economic, market and business conditions, competition for qualified staff, the regulatory process and actions, technical issues, new legislation, potential delays or changes in plans, uncertainties resulting from operating in a new political jurisdiction, uncertainties regarding the results of exploration, the timing and granting of prospecting rights, the timing and granting of regulatory and other third party consents and approvals, Guardian Metal's or any third party's ability to execute and implement future plans, and the occurrence of unexpected events.
Forward-looking statements are subject to risks and uncertainties, including those described in the Company's filings with the U.S. Securities and Exchange Commission. Guardian Metal undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required by law.
This announcement does not purport to be full or complete. No reliance may or should be placed by any person for any purpose on the information contained in this announcement or its accuracy, fairness or completeness. The information in this announcement is subject to change.
For further information visit www.Guardianmetalresources.com or contact the following:
Guardian Metal Resources plc Oliver Friesen (CEO) | Tel: +44 (0) 20 7583 8304 |
Cairn Financial Advisers LLP Nominated Adviser Sandy Jamieson/Jo Turner/Louise O'Driscoll | Tel: +44 (0) 20 7213 0880 |
Berenberg Joint Broker and Financial Adviser Jennifer Lee/Ivan Briechle | Tel: +44 (0) 20 3207 7800 |
Tamesis Partners LLP Joint Broker Charlie Bendon/Richard Greenfield | Tel: +44 (0) 20 3882 2868 |
Tavistock Financial PR Emily Moss/Josephine Clerkin | Tel: +44 (0) 7920 3150 / +44 (0) 7788 554035 |
About Guardian Metal Resources
Guardian Metal Resources PLC (NYSE.A:GMTL)(LON:GMET)(OTCQB:GMTLF) is a strategic mineral exploration company driving the revival of U.S. mined tungsten production and strengthening America's defense metal independence. The Company is advancing two co-flagship tungsten projects, Pilot Mountain, one of the largest undeveloped tungsten deposits in the U.S. and Tempiute, formerly America's largest producing tungsten operation, both located in Nevada, one of the top-rated mining jurisdictions in the United States.
In July 2025, the U.S. Department of War (DoW) under Title III of the Defense Production Act of 1950, as amended, invested U.S.
Tungsten is a strategic metal critical to the defense, energy transition, technology, and industrial sectors. In the context of shifting geopolitical dynamics and tightening Chinese export restrictions, Guardian Metal is well positioned to play a leading role in re-establishing a secure, domestically mined U.S. supply chain for this vital defense metal.
This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact rns@lseg.com or visit www.rns.com.
SOURCE: Guardian Metal Resources PLC
View the original press release on ACCESS Newswire