REG - Guardian Metal Rsrc. - Tempiute Project Operational Update

Guardian Metal ResourcesAnnouncement

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RNS Number : 4765E  Guardian Metal Resources PLC  23 October 2025

23 October 2025

Guardian Metal Resources plc

('Guardian Metal' or the 'Company')

Tempiute Project - Operational Update

Guardian Metal Resources plc (LON:GMET, OTCQB:GMTLF), a strategic development
and mineral exploration company focused on tungsten in Nevada, USA, is pleased
to announce an operational update for the Company's Tempiute (Emerson)
tungsten project ("Tempiute" or the "Project") located 250 miles southeast of
the Company's Pilot Mountain project in Nevada. Tempiute is a significant past
producing tungsten mine, operating most recently during the 1980s.

As a critical defence metal, tungsten has been designated as a strategic
priority by the U.S. government. Guardian Metal's mission is to establish its
co-flagship projects, Tempiute and Pilot Mountain, as the cornerstone of U.S.
tungsten supply, directly supporting national efforts to reshore its
production. This is intended to help the U.S. reduce reliance on foreign
supply chains, strengthen economic and defence security, and deliver long-term
value for shareholders.

 

KEY HIGHLIGHTS

·    Drilling advancing at rapid pace: fifteen diamond drillholes
completed since early September for over 2,185m enabling rapid advancement
through the current planned Tempiute drilling programme and beyond.

 

·    Consistent tungsten mineralisation confirmed: every hole to date has
intersected scheelite-bearing skarn intervals of varying thicknesses.

 

·    Extensive technical workstreams underway: concurrent geophysical,
geochemical, metallurgical and gallium studies are expanding Guardian Metal's
understanding of the broader Project potential.

 

·    Strong operational foundation for growth: on-site core processing and
cutting facilities now fully established, enabling a continuous flow of
analytical results, while mill site refurbishments progress to prepare
Tempiute for its next stage of development.

 

Oliver Friesen, CEO of Guardian Metal, commented:

"Tempiute continues to deliver strong technical progress across all fronts.
The ongoing drilling programme is confirming the continuity and scale
potential of multiple stacked skarn-zones, (the host alteration type for
tungsten) in areas beyond the historical underground mined area. Our recently
completed geophysical surveys, rock sampling and geological mapping have
opened up clear target areas for drill testing.  Historical extensive
datasets, production records and metallurgical reports have been digitally
compiled, and they are rapidly being developed to improve our understanding of
the broader Project opportunities.

"In parallel, we are advancing important groundwork - from environmental
baseline studies and site infrastructure upgrades to the assessment of
reprocessing opportunities from historical stockpiles and tailings - all
designed to position Tempiute for its next phase of growth.

"Our recent collaboration on gallium mineralisation and potential processing
also underscores our commitment to unlocking the Project's broader strategic
potential beyond just tungsten.

"With drilling and data integration advancing rapidly, Guardian Metal is
establishing a strong foundation for the next exciting chapter in one of
Nevada's most historically important tungsten districts."

 

DETAILED UPDATES

·   Guardian Metal is currently drilling hole TP25-016, which is the 16th
diamond drillhole completed at Tempiute since drilling commenced early
September for a total of 2,185m. To date, drilling has focused along circa
800m of strike length across the Dead-Eye Zone (see Figure 1), targeting
down-dip extensions of north-south trending surface-exposed skarn.  This area
is outside the area of historic underground mining and offers the potential
for at and near surface mineralisation.

 

·    Mineralisation has been intersected in all drillholes to date
including multiple different scheelite-rich skarn types which includes
garnet-pyroxene, pyroxene-carbonate, and garnet-sulphide. Additionally, zones
of endoskarn (mineralisation inside the intrusive rocks rather than beside
them) have been observed within the intrusive host rock near its contact with
carbonaceous units. This type of mineralisation is not present at Pilot
Mountain.

 

·   To the Company's encouragement, due to excellent ground conditions,
drilling operations are progressing at a rapid pace, over three times faster
than at Pilot Mountain. This will allow Guardian Metal to progress through the
currently planned (and future) drilling operations at Tempiute at an expedited
pace.

 

·    All drill core is being logged, processed, cut and sampled on site
within the existing mill building before being transported to Reno, Nevada,
for laboratory analysis. This approach enables a steady flow of assay results
throughout the programme, supporting ongoing drill targeting and providing
regular updates to the market.

 

·    Several additional holes are planned at the Dead-Eye Zone before the
programme advances to drill and twin select historical holes within the Main
Mine Area. Following which the Wesley, Schofield, Lime Cap, and Blind Eye
Zones are set to be drill tested.

 

·   Guardian Metal has commenced a detailed study of gallium mineralisation
at Tempiute in collaboration with the University of Bristol. More than 100
samples of skarn-hosted mineralisation have been collected across the Project
and will be analysed to better understand the relationship between mineralogy
and gallium enrichment, with the goal of assessing the potential for future
gallium production. Analytical work will be conducted using Scanning Electron
Microscopy (SEM) and Energy-Dispersive X-ray Spectroscopy (EDS).

 

·    A detailed rock chip geochemical sampling programme was completed
targeting the northern intrusion to assess porphyry fertility and overall
prospectivity. Laboratory results are expected later this month.

 

·    Guardian Metal has completed an Induced Polarisation (IP) electrical
ground geophysical survey covering 7.35 line-km across five lines. The
Volterra-2DIP program was designed to investigate subsurface resistivity and
chargeability characteristics to support ongoing exploration at the Project.
Results show a clear correlation between resistive anomalies and the presence
of scheelite-bearing skarn mineralisation. Data quality was high, supported by
robust acquisition and QA/QC procedures. Several holes from the ongoing
drilling campaign have been planned to test the most promising anomalies
identified.

 

·    A detailed drone-based magnetic geophysics survey was completed in
late September, covering 435 line-km. Preliminary data indicates a strong
correlation between elevated magnetic responses and the causative intrusive
stocks. The data is now undergoing advanced processing and inversion to
generate refined grids and three-dimensional models, which will serve as key
tools in further delineating mineralisation across the Project in order to aid
future exploration.

 

·   Guardian Metal is working with a leading metallurgical consultancy to
undertake a comprehensive analysis of bulk samples collected from both the
residual stockpiles and the tailings. As part of the scope, a beneficiation
assessment will be completed to characterise the material and evaluate
potential reprocessing pathways, with the goal of determining the economic and
technical feasibility of recovering valuable minerals from these historic
sources.

 

·    Guardian Metal is improving the existing infrastructure at Tempiute
by repairing windows and doors and patching walls and roofs to restore
weatherproofing and prepare for the upcoming winter season (Figure 2). The
team has also cleared and organised the mill site, as well as continued with
key building refurbishments to prepare Tempiute for the next stage of project
development. In addition, mineral exploration facilities have been established
on site, including core logging and processing equipment, and temporary office
structures.

 

·    Guardian Metal is in the final stages of appointing contractors to
undertake the planned baseline environmental studies, which are scheduled to
begin in early 2026. These studies will provide essential data to support the
Project's long-term development objectives and form a key component of the
next stage of permitting under the Project's forthcoming Plan of Operations.

 

Conclusions

 

The Tempiute project is responding very well to early near-surface exploration
and drilling, both within and beyond the extensive historical tungsten mining
area. The current drilling programme aims to define near-surface tungsten
resources that would support the reinstallation of milling and processing
equipment on the existing foundations and within the original mill building,
aligning with Guardian Metal's broader mission to re-establish secure,
domestically sourced tungsten production within the U.S.

 

 

MEDIA:

 

 

Figure 1: Project geology map showing location of key drilling targets.

Figure 2: Millsite building undergoing refurbishment .

 

 

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, such
as general economic, market and business conditions, competition for qualified
staff, the regulatory process and actions, technical issues, new legislation,
uncertainties resulting from potential delays or changes in plans,
uncertainties resulting from working in a new political jurisdiction,
uncertainties regarding the results of exploration, uncertainties regarding
the timing and granting of prospecting rights, uncertainties regarding the
timing and granting of regulatory and other third party consents and
approvals, uncertainties regarding the Company's or any third party's ability
to execute and implement future plans, and the occurrence of unexpected
events.

Actual results achieved may vary from the information provided herein as a
result of numerous known and unknown risks and uncertainties and other
factors.

For further information visit www.Guardianmetalresources.com
(http://www.goldenmetalresources.com) or contact the following:

 Guardian Metal Resources plc                 Tel: +44 (0) 20 7583 8304

 Oliver Friesen (CEO)
 Cairn Financial Advisers LLP                 Tel: +44 20 7213 0880

 Nominated Adviser

 Sandy Jamieson/Jo Turner/Louise O'Driscoll
 Tavistock                                    Tel: +44 (0) 7920 3150/ +44 (0) 7788 554035

 Financial PR                                 guardianmetal@tavistock.co.uk

 Emily Moss/Josephine Clerkin

 

 

 

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