REG - Guardian Metal Rsrc. - Pilot Mountain Porphyry Copper Results

Guardian Metal ResourcesAnnouncement

01/08/2025 07:00

For best results when printing this announcement, please click on link below:
https://newsfile.refinitiv.com/getnewsfile/v1/story?guid=urn:newsml:reuters.com:20250801:nRSA5049Ta&default-theme=true

RNS Number : 5049T  Guardian Metal Resources PLC  01 August 2025

1 August 2025

Guardian Metal Resources plc

('Guardian Metal' or the 'Company')

Pilot Mountain Porphyry Copper Results

Geochemical Results Confirm Significant Cu-Mo Footprint

Guardian Metal Resources plc (LON:GMET, OTCQX:GMTLF), a strategic mineral
exploration and development company focused in Nevada, USA, is pleased to
announce rock chip assay results and geological observations from the
Company's ongoing porphyry copper exploration campaign at its 100%
owned Pilot Mountain  Project ("Pilot Mountain" or the "Project")
located in Nevada, USA.

While the Company remains primarily focused on advancing tungsten exploration
and development at its co-flagship projects, both are considered to hold
significant porphyry copper (Cu) and molybdenum (Mo) potential, which will be
further evaluated through targeted drilling at the appropriate stage.

Laboratory assay results from rock chip samples collected across the Porphyry
South Zone ("Porphyry South") target area have been received and are being
integrated with geological field observations from the Company's ongoing
exploration. These combined findings are helping to refine drill targeting,
with an initial drilling programme tentatively planned following the
completion of all skarn-related tungsten-focused drilling.

TECHNICAL SUMMARY

§ Rock chip sampling from outcrop shows highly elevated copper and molybdenum
concentrations across the circa 1.5 km(2) Porphyry South Zone, and delineates
a sizeable area of >500 ppm Cu results (Figure 1).

 

§ A 1km long section of the 'Breccia Ridge Zone' has been geologically mapped
and sampled, with 15 rock chip assays  >1,000 ppm Cu and up to 20,500 ppm
(2.05 %) Cu (Figure 1).

 

§ The Company has finalised plans to extend the existing three dimensional
induced polarisation ("3D IP") geophysical survey to cover the entire Porphyry
South area. This 3D IP survey will commence shortly and will be used to
finalise drill targets for porphyry style Cu-Mo mineralisation.

Oliver Friesen, CEO of Guardian Metal, commented:

"These new results provide a further layer of evidence that Pilot Mountain
hosts a much larger mineral system than previously understood. While our main
work continues to be centred on advancing the tungsten-copper-silver-zinc
skarns, the results thus far from this porphyry- focused study increasingly
point to a porphyry environment worth investigating further.

"The data not only expands the interpreted footprint of Porphyry South but
also strengthens the case for a complex multi-metal system at depth. With
clear indications of molybdenum and copper fertility, we see significant merit
in testing these porphyry targets once the tungsten-focused drilling programme
is completed."

 

ONGOING EXPLORATION AT THE PORPHRY SOUTH ZONE

Whilst tungsten focussed drilling is ongoing at Desert Scheelite and Garnet
W-Cu-Ag-Zn skarns, the Company has remained committed to further exploration
at Porphyry South.

Porphyry South comprises a 1.5km(2) area of outcropping silicic and
quartz-sericite-pyrite ("QSP") alteration, stockwork quartz veins and
gossanous breccias in metasediments intruded by quartz monzonite (Figures
1-3). Through geochemical fingerprinting by the Company, the magmatic system
has already been confirmed as 'fertile' for porphyry Cu-Mo mineralisation.(1)

Following reconnaissance level sampling and geological mapping of Porphyry
South by Dr Lawrence Carter in 2024 (as previously reported (1,2,3)), the
ongoing exploration includes detailed mapping of the quartz monzonite and
associated porphyry dykes, copper shows, sulphides and quartz vein density.

An outcrop rock chip sampling campaign has also now been completed to
determine the geochemical footprints of mineralisation and alteration across
the Project, with a focus on Porphyry South. A total of 189 outcrop rock chip
samples have been assayed by four acid-digest multi element ICP-MS and ICP-AES
determination (Figure 1).

Significantly, the rock chip samples confirm elevated copper and molybdenite
across the entirety of Porphyry South (Figure 1). Additionally, the rock chip
assays highlights a circa 0.2 km(2) area of >500 ppm Cu which partially
overlaps  a 0.2 km(2) area of >250 ppm Mo. This area of interest has been
named the "Breccia Ridge Zone", which includes a 1 km long ridge with various
outcrops of gossanous and mineralised breccias (Figures 3). To confirm the
composition of the mineralised breccia a sample was taken for petrographic
study, with thin section mineralogical mapping using an Automated Material
Identification and Classification System ("AMICS") confirming the copper
minerals cuprite, malachite and tenorite (Figure 4).

A total of 15 rock chip samples taken variably along this ridge returned
>1,000 ppm  Cu, and up to 20,500 ppm (2.05%) Cu. The rock chip samples
across Porphyry South also highlight two separate areas of approximately 0.02
km(2) and 0.04 km(2) which returned >500 ppm Cu.

Trace element geochemistry also shows the Porphyry South area to have elevated
arsenic (>~50 ppm As), Selenium (>~2 ppm Se) and tellurium (>~0.1 ppm
Te) which, agreeing with the outcropping alteration, places the surface
exposures at Porphyry South within the "quartz-sericite-pyrite" or "phyllic"
zone, which is typically interpreted to overlie and surround the core of a
porphyry system where the highest copper grades are typically found.(4,5)

In addition, boulders of quartz monzonite containing quartz unidirectional
solidification textures (USTs) have been found as float in a small creek bed
(i.e. not from outcrop) in the Porphyry South area (see Figure 5). Whilst the
boulders are not mineralised, the observed textures are useful porphyry
exploration indicators, since they typically form in the upper or 'cupola
zones' of magmatic systems, where mineralised porphyry systems typically
develop.(5,6)

Following on from the rock chip sampling results, the Company has finalised
plans to extend the existing three dimensional induced polarisation ("3D IP")
geophysical survey to cover the entire Porphyry South area. This 3D IP survey
will be used to finalise drill targets for porphyry style Cu-Mo
mineralisation. A MSc student research project (at Camborne School of Mines,
University of Exeter, UK) on the Porphyry South zone is also ongoing.

 

Figure 1. Map of the  Pilot Mountain project showing magnetic intensity,
skarn and Porphyry South Zone, together with key features and rock chip sample
copper (Cu) concentrations.

Figure projection: UTM zone 11N NAD 83

Figure 2. Examples of gossanous stockwork quartz-sulphide veins and secondary
copper shows in QSP altered and silicified metasediments in the Porphyry South
area.

Figure 3. Example of gossanous breccia on the "Breccia Ridge Zone", which returned (sample LC-PM-28) 728 ppm Cu, 450 ppm Mo and 22.9% Fe.

Figure 4. Automated Material Identification and Classification System (AMICS)
mineralogical maps of thin sections of gossanous breccia from the Breccia
Ridge Zone. A duplicate of this sample (LC-01-08) retuned 4.5% Cu and 280 ppm
Mo.

 

Figure 5. Quartz unidirectional solidification textures (USTs) in sericite
altered quartz monzonite cut by subsequent quartz veins. Sample found as float
in small creek bed, not from outcrop.

 

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/geochemical-results-confirm-porphyry-cu-fertility/16758532
(https://www.londonstockexchange.com/news-article/GMET/geochemical-results-confirm-porphyry-cu-fertility/16758532)
 

(2)
https://www.londonstockexchange.com/news-article/GMET/pilot-mountain-significant-porphyry-update/16589687
(https://www.londonstockexchange.com/news-article/GMET/pilot-mountain-significant-porphyry-update/16589687)

 

 

(3)
https://www.londonstockexchange.com/news-article/GMET/significant-porphyry-south-copper-results/16871827
(https://www.londonstockexchange.com/news-article/GMET/significant-porphyry-south-copper-results/16871827)

 (4                   ) Halley, S. et al., 2015. SEG
newsletter, no. 100, p. 1-13.

(5                     ) Sillitoe, R.H., 2010. Economic
Geology, 105, pp. 3-41.,

(6                     ) Carter, L.C. and Williamson, B.J.
Ore Geol Rev, 143, 104783. https://doi.org/10.1016/j.oregeorev.2022.104783
(https://doi.org/10.1016/j.oregeorev.2022.104783)

 

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 take
responsibility 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

 

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 (mailto:rns@lseg.com)
 or visit
www.rns.com (http://www.rns.com/)
.

RNS may use your IP address to confirm compliance with the terms and conditions, to analyse how you engage with the information contained in this communication, and to share such analysis on an anonymised basis with others as part of our commercial services. For further information about how RNS and the London Stock Exchange use the personal data you provide us, please see our
Privacy Policy (https://www.lseg.com/privacy-and-cookie-policy)
.   END  DRLWPUUCMUPAGRG