REG - Guardian Metal Rsrc. - Tempiute Mine Project – Significant Assay Results

Guardian Metal ResourcesAnnouncement

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RNS Number : 8628O  Guardian Metal Resources PLC  30 June 2025

30 June 2025

Guardian Metal Resources plc

('Guardian Metal' or the 'Company')

Tempiute Mine Project - Significant Assay Results

Very High Grade Tungsten and Gallium Mineralisation Confirmed Across Multiple
High-Impact Project Areas

Guardian Metal Resources plc (LON:GMET, OTCQX:GMTLF), a strategic mineral
exploration development company focused on tungsten in Nevada, USA, is pleased
to announce assay results from the Tempiute tungsten project ("Tempiute" or
the "Project") and newly staked exploration targets. Tempiute, formerly known
as the Emerson Tungsten Mine, is located in south-central Nevada less than 250
miles (402 km) southeast of the Company's Pilot Mountain tungsten project.

As part of its systematic evaluation of Tempiute-historically one of the top
tungsten-producing mines in the United States-Guardian Metal has identified
multiple new zones of exposed tungsten mineralisation. Through direct claim
staking, the Company has significantly expanded its land position by staking
31 additional Bureau of Land Management ("BLM") Mining Claims. Geochemical
sampling of these newly identified areas has confirmed the presence of
significant tungsten mineralisation. As a result, the Company has further
strengthened its 100%-owned and optioned property portfolio across this
exciting district.

Guardian Metal engaged Dr. Lawrence Carter to conduct a geological field
review of the Tempiute Project and surrounding targets identified during the
Company's recently completed regional desktop exploration programme. Dr.
Carter's initial field observations, along with the Company's subsequent
staking of additional claims to secure newly verified targets, were announced
on 30 April 2025.(1)

Oliver Friesen, CEO of Guardian Metal, commented:

"These exciting results from Tempiute highlight how much untapped potential
remains in one of America's most historically significant tungsten districts.
As we continue advancing both Tempiute and Pilot Mountain at pace, Guardian
Metal remains focused on a clear mission: to bring mined tungsten supply back
to U.S. soil, reduce reliance on foreign sources, and help build a secure,
resilient domestic supply chain for the future."

HIGHLIGHTS

§     High grade tungsten mineralisation confirmed along >1,300 m
strike length of outcropping skarn at Tempiute where historic underground
mining was carried out up to 350m below surface. Rock chip samples returned
assay values up to 0.94% tungsten trioxide (WO(3)) (Table 1).

 

§     Notably, historical reports highlighted the gallium (Ga) potential
across Tempiute but this metal was not routinely assessed. The Company's 2025
sampling has confirmed significant gallium results across the historically
mined horizon with samples up to 90 ppm Ga.

 

§     High grade tungsten and gallium skarn mineralisation confirmed at
newly claimed exploration targets named the 'East Zone' located along the east
margins of the Tempiute north quartz monzonite stock including results up to
1.2% WO(3) with 90 ppm Ga and 0.87% WO(3) with 100 ppm Ga (Table 1). The 'East
Zone' represents a new high-impact underexplored area for future exploration
that is 100% owned.

 

§     New grab samples from "truck-ready" historic ore stockpiles contain
up to 0.40%  WO(3)  and 60 ppm Ga, and samples from a sulphide rich
stockpile contained up to 7,960 ppm Zn. These supplement previous stockpile
samples of up to 1.50% WO(3) and 70 ppm Ga (Table 2).

 

§      Auger sampling of the historical Tempiute tailings material has
identified strongly elevated results for gallium, tungsten and zinc down the
entire 9.75 m deep auger hole (Table 3). Further auger test holes have already
been commissioned and are underway.

 

§     Porphyry-style Mo mineralisation confirmed with zones of stockwork
quartz-molybdenite-pyrite veins in quartz-sericite-pyrite (QSP) altered quartz
monzonite veins containing up to 4,300 ppm Mo. Both north and south quartz
monzonite intrusions are geochemically 'fertile' from a porphyry system
perspective and further details will be covered in a future announcement.

 

§       High grade tungsten skarn mineralisation confirmed at the newly
staked Worthington  system with highlight results up to 2.66% WO(3) along
with 1.39% Zn and 2,110 ppm Mo (Table 4).

 

HIGH GRADE TUNGSTEN AND GALLIUM SKARN MINERALISATION AT TEMPIUTE

At the Tempiute mine area, garnet-pyroxene skarn was traced in outcrop for
over a 1,300 m distance, along the contact between the south Cretaceous-aged
quartz monazite intrusion and the host limestones. Rock chip samples were
collected along the entire 1,300 m outcrop. Geochemical analysis confirmed
consistent results >0.19% WO(3) along the strike length, with sample
highlights of up to of 0.94% WO(3). Significantly, gallium (Ga) is also
consistently >60 ppm along the strike length, with an individual sample
returning a high of 90 ppm Ga (Table 1).

Dr. Carter's fieldwork identified multiple new zones of outcropping garnet
skarn mineralisation along the southern, eastern, and northern margins of the
north quartz monzonite stock. These newly discovered zones were subsequently
secured through additional BLM claim staking by the Company. Rock-chip samples
collected from these outcrops and newly acquired claims returned very
high-grade tungsten and encouraging gallium values, including 1.20% WO₃ with
90 ppm Ga and 0.87% WO₃ with 100 ppm Ga. While some of these skarns show
signs of limited historical mining, others appear entirely unworked. No
evidence of past drilling was observed, suggesting these zones remain largely
unexplored. As such, these new claims present a significant opportunity for
Guardian Metal to enhance the value of the broader Project area.

Table 1: Summary of selected rock chip samples of outcropping skarn from
across the Tempiute project.

 Sample ID  Latitude  Longitude   Lithology         WO(3) (%)  Zn (ppm)  Mo (ppm)  Ga (ppm)
 LC-TP-03*  37.62968  -115.62927  Skarn, gossanous  0.94       539       65        10
 LC-TP-05   37.65063  -115.63186  Skarn, coarse Mo  0.02       403       50        60
 LC-TP-06   37.64087  -115.63178  Garnet skarn      0.22       12200     98        90
 LC-TP-15   37.63397  -115.63085  Skarn, gossanous  0.24       171       12        40
 LC-TP-17   37.63340  -115.63028  Garnet skarn      0.11       202       11        70
 LC-TP-18   37.63452  -115.63161  Garnet skarn      0.78       1315      703       60
 LC-TP-19   37.63487  -115.63135  Garnet skarn      0.02       220       3         30
 LC-TP-20   37.63621  -115.63325  Skarn, coarse Mo  0.03       1230      4190      20
 LC-TP-23   37.64268  -115.62888  Garnet skarn      0.03       577       45        30
 LC-TP-24   37.64269  -115.62890  Garnet skarn      0.70       22300     88        80
 LC-TP-26   37.64131  -115.63099  Banded skarn      0.09       1530      10        50
 LC-TP-29   37.64012  -115.63236  Garnet skarn      0.25       1075      9         70
 LC-TP-30   37.63220  -115.62864  Garnet skarn      0.02       310       9         70
 LC-TP-31*  37.63195  -115.62870  Garnet skarn      0.04       181       7         50
 LC-TP-32*  37.63141  -115.62754  Garnet skarn      0.13       162       10        60
 LC-TP-33*  37.63118  -115.62632  Gossan            0.37       6260      88        10
 LC-TP-35*  37.62960  -115.62740  Gossan            0.27       3130      153       10
 LC-TP-41*  37.65316  -115.62138  Garnet skarn      0.02       822       4         70
 LC-TP-42*  37.65155  -115.62095  Garnet skarn      0.01       438       2         50
 LC-TP-43*  37.65092  -115.62080  Garnet skarn      1.20       4230      38        90
 LC-TP-45*  37.64517  -115.62265  Garnet skarn      0.87       4720      60        100
 LC-TP-46*  37.64530  -115.62312  Garnet skarn      0.05       1760      15        50
 LC-TP-50*  37.65661  -115.62527  Garnet skarn      0.03       669       15        40
 LC-TP-52   37.64216  -115.62949  Garnet skarn      0.13       15050     53        40
 LC-TP-53   37.64218  -115.62946  Gossanous veins   0.59       403       157       30
 Analysis by ALS' ME-ICP61. Samples over >1500 ppm W (>0.19 % WO(3))
 re-run by ALS' XRF15c. W concentrations determined by ICP-AES converted to %
 WO(3)  by stoichiometric calculation.

 

STOCKPILES

New grab rock samples were collected from the numerous historical ore
stockpiles around the Project. Individual samples from a stockpile located
immediately adjacent to the crusher site, include: 0.16% WO(3) with 60 ppm Ga,
0.33% WO(3) with 40 ppm Ga and 3.97% Zn, and 0.40% WO(3). Two grab samples
collected from a separate sulphide/gossan rich stockpile, recently claim
staked by the Company, contain 7,960 ppm Zn with 0.04% WO(3), and 3,020 ppm Zn
with 0.08% WO(3) ppm (Table 2). These add to stockpile samples previously
collected by the Company and reported on 18 December 2024(2) (Table 2) which
included up to 1.50% WO(3) and 70 ppm Ga.

These stockpiles are alongside the existing roads and are deemed, by the
Company, to be "truck-ready" for transport to a processing facility. Guardian
is exploring potential options to process this material in the shortest
timeframe possible, given that they could represent the only domestic primary
mined source of tungsten in the USA.

Table 2: Summary of selected grab samples collected from Tempiute stockpiles.

 Sample ID  Latitude  Longitude   Sample Description                   WO3 (%)  Zn (ppm)  Cu (ppm)  Ga (ppm)
 LC-TP-09   37.63723  -115.62363  Gossan stockpiled                    0.04     7960      214       10
 LC-TP-10   37.63777  -115.62342  Gossan stockpiled                    0.08     3020      90        20
 LC-TP-14   37.63449  -115.63111  Garnet skarn stockpiled              0.15     282       1         30
 LC-TP-39   37.63934  -115.63264  Garnet skarn stockpiled              0.33     39700     30        40
 LC-TP-40   37.63917  -115.63282  Garnet skarn stockpiled              0.16     444       18        60
 LC-TP-54   37.65091  -115.63121  Coarse Garnet skarn stockpiled       0.01     279       3         40
 LC-TP-55   37.65078  -115.63142  Banded skarn stockpiled              0.40     1025      65        10
 OF-01*     37.65069  -115.63148  Gossanous skarn, stockpiled          0.37     1320      628       20
 OF-02*     37.65065  -115.63142  Gossanous skarn, stockpiled          0.55     523       479       20
 OF-03*     37.64212  -115.62945  Semi-massive sulphide,  stockpiled   0.25     213       3580      20
 OF-04*     37.64214  -115.62943  Garnet skarn, stockpiled             0.04     139       43        80
 OF-05*     37.63454  -115.63109  Skarn, coarse Mo, stockpiled         0.11     648       24        30
 OF-06*     37.63454  -115.63109  Garnet skarn, stockpiled             0.48     2960      22        20
 OF-07*     37.63644  -115.63382  Garnet skarn, stockpiled             1.50     3720      32        60
 OF-09*     37.63643  -115.63381  Semi-massive sulphide,  stockpiled   0.31     238       805       10
 OF-10*     37.63643  -115.63381  Semi-massive sulphide,  stockpiled   0.03     259       1975      10
 OF-11*     37.63952  -115.63238  Gossanous skarn, stockpiled          0.36     768       1905      20
 OF-13*     37.63958  -115.63255  Garnet skarn, stockpiled             0.31     220       17        60
 OF-14*     37.63957  -115.63255  Semi-massive sulphide,  stockpiled   0.01     366       1740      20
 OF-15*     37.63920  -115.63256  Garnet skarn, stockpiled             0.94     5510      24        70
 Analysis by ALS' ME-ICP61. Samples over >1500 ppm W (>0.19 % WO(3))
 re-run by ALS' XRF15c. W concentrations determined by ICP-AES converted to %
 WO(3)  by stoichiometric calculation.

 *Previously collected samples, partly reported by the Company 18 December
 2024(2)

 

TESTING OF TAILINGS

The Company completed the first ever known sampling of the historical Tempiute
mine tailings material with a view to assess the potential to re-process that
material. A total of two auger holes, in a single location have been completed
to date, the first hole , DH-01, was shut down early due to technical issues,
auger hole DH-02 resampled the same location.

Across DH-02 a total of 9.75 m (32 feet) were sampled with assay results
returning highly elevated gallium, zinc and tungsten throughout the auger
hole, including highlight assays up to 745 ppm WO(3), 4,560 ppm Zn and 43 ppm
Ga. Of particular note is the consistently elevated Ga results throughout the
auger hole. In light of these positive results, the Company has expanded the
sampling programme with further test auger holes currently in progress and
with analytical results to follow. A key next step, following the receipt of
additional results, will be to assess the metallurgy and evaluate processing
options for recovering residual metals from the tailings. Planning is
currently underway to advance this phase of the programme.

Table 3: Summary of selected Tempiute historic tailings drilling results.

 Sample ID  Hole   Latitude  Longitude   WO(3) (ppm)  Zn (ppm)  Ga (ppm)
 TP-T-03    DH-02  37.65941  -115.64525  745          4840      30.3
 TP-T-05    DH-02  37.65941  -115.64525  510          4560      34.4
 TP-T-07    DH-02  37.65941  -115.64525  355          3090      41.5
 TP-T-09    DH-02  37.65941  -115.64525  292          2560      43.2
 TP-T-11    DH-02  37.65941  -115.64525  239          2390      42.4
 W and Ga analysis by ALS' ME-MS81. W concentrations determined by ICP-MS
 converted to % WO(3)  by stoichiometric calculation. Zn by ALS' ME-MS61L.

 

HIGH GRADE TUNGSTEN SKARN MINERALISATION CONFIRMED AT NEWLY STAKED SATELLITE
CLAIMS, WORTHINGTON

The Company's regional exploration programme led to BLM Mining Claim staking
of the Worthington skarn system, 34 km north of Tempiute, in the Worthington
Mountains. During the programme Dr Carter mapped and sampled the outcropping
garnet-pyroxene skarn for a c. 400 m distance at a granite-limestone contact
along a ridge side. The area appears to be completely unexplored beyond one
very short adit and shaft.

Highlights from the rock-chip samples of the mineralised skarn include: 2.66%
WO(3) with 1.39% Zn and 2,110 ppm Mo; and 1060 ppm Zn with 9.1 g/t Ag (Table
4).

The Company is following up these very promising assay results with further
detailed geological field work to better delineate and understand the high
grade tungsten skarn mineralisation across the Worthington claims.

Table 4: Summary of selected rock chip samples of outcropping skarn at
Worthington

 Sample ID  Latitude  Longitude   WO3 (%)  Zn (ppm)  Ag (g/t)  Cu (ppm)  Mo (ppm)
 LC-WRT-01  37.95870  -115.61130  2.66     13850     <0.5      25        2110
 LC-WRT-07  37.95487  -115.61055  <0.1     1060      9.1       11        1

 

ANALYTICAL METHODS

The samples from outcrop and stockpiles were assayed by ALS Laboratories
method  ME-ICP61 (four acid digest followed by ICP-AES). High grade tungsten
samples (>1,500 ppm W) were re-run by ALS method  XRF15c (XRF after Li
borate fusion), which provides a much more effective digestion of scheelite
than four acid digest, and therefore provides a better representation of
actual tungsten concentration.

Auger samples from the Tempiute tailings were analysed by ALS method ME-MS61L
(ICP-MS after four acid digest) and ALS' MS81 (ICP-MS after Li fusion).

 

MEDIA

Figure 1: Tempiute Overview Map

 

COMPETENT PERSON STATEMENT

The technical information contained in this disclosure has been read and
approved by Mr Nick O'Reilly (MSc, DIC, MIMMM QMR, MAusIMM, FGS), who is a
qualified geologist and acts as the Competent Person under the AIM Rules -
Note for Mining and Oil & Gas Companies. Mr O'Reilly is a Principal
consultant working for Mining Analyst Consulting Ltd which has been retained
by Guardian Metal Resources plc to provide technical support.

REFERENCES

(1)
https://www.londonstockexchange.com/news-article/GMET/tempiute-mine-project-geological-update/17012358
(https://www.londonstockexchange.com/news-article/GMET/tempiute-mine-project-geological-update/17012358)

(2)
https://www.londonstockexchange.com/news-article/GMET/tempiute-mine-mill-project-due-diligence-update/16816727
(https://www.londonstockexchange.com/news-article/GMET/tempiute-mine-mill-project-due-diligence-update/16816727)

 

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 the contents of 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, 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
 Shard Capital Partners LLP                   Tel: +44 (0) 20 7186 9000

 Lead Broker

 Damon Heath/Erik Woolgar

 

 

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