EQS-News: Pilot North: Very-High Grade Assay Results

29 September 2025

Guardian Metal Resources plc

('Guardian Metal' or the 'Company')

Pilot North: Very-High Grade Assay Results

Guardian Metal Resources plc (LON:GMET, OTCQB:GMTLF), a strategic development and mineral exploration company focused on tungsten in Nevada, USA, is pleased to provide an exploration update for the recently acquired, 100%-owned, Pilot North tungsten-copper project (“Pilot North” or the “Project”), located in the Walker Lane Mineral Belt, approximately 15km northwest of the Company’s Pilot Mountain project, in Nevada.

The Company’s mission is to establish Guardian Metal as a cornerstone of U.S. tungsten supply, directly supporting national efforts to reshore production of this critical defence mineral. With tungsten designated as a strategic priority by the U.S. government, the Company is advancing its two flagship Nevada projects—Tempiute and Pilot Mountain. By unlocking domestic tungsten resources, Guardian Metal aims to help reduce reliance on foreign supply chains, strengthen U.S. economic and defence security, and deliver long-term value for shareholders.

The Company has now received the assay results for 92 rock chip samples collected during geological fieldwork following the recent staking of Pilot North through direct mining claim staking totalling 102 new Bureau of Land Management (“BLM”) Lode Claims, announced 13 August 2025.¹ The Project was established as a direct result of the Company’s ongoing regional exploration programme.

Oliver Friesen, CEO of Guardian Metal, commented: 

“I am very pleased with the progress we have made on Pilot North since our initial staking just a few months ago. The combination of both the high tenor and consistency of the rock chip assay results—particularly in copper, silver, and tungsten—across much of the Project area is very encouraging and, in our view, underscores the potential importance of this developing opportunity for the Company.

“Importantly, this Project is 100% owned by Guardian Metal, royalty free. Conveniently, it is also 15 km away from Pilot Mountain and shares the same access road.

“We look forward to continuing to move this opportunity forward rapidly, alongside the important work that is currently ongoing at both Pilot Mountain and Tempiute.”

 

TECHNICAL SUMMARY

• Pilot North includes the historical World War II-era mines of “Copper Head”, “Western Metals”, “Muller Mountain”, “Jasper” and “Tungsten Valley”, each with extensive outcropping tungsten (W) – copper (Cu) bearing skarns at the contact of granitic intrusions with limestones of the Luning Formation (i.e. the same geology as the Company’s Pilot Mountain project).

 

• Notably, very high-grade copper, silver, tungsten, zinc and strongly anomalous lead, gallium and Gold was returned from multiple areas within the Project including (Table 1):

 

• 31 overlimit copper assay results including: 14.65%, 10.6%, 9.21%, 8.86%, 7.22%, 6.92%, 6.89%, 6.78%, 6.7%, 6.27%, 5.56% and 5.3% Cu.

 

• 12 overlimit silver assay results including: 708 g/t, 538 g/t, 496 g/t, 319 g/t, 284 g/t, and 276 g/t Ag.

 

• 13 overlimit tungsten trioxide (WO₃) assay results including: 0.59%, 0.46%, 0.40%, 0.36%, and 0.36% WO₃.

 

• Additionally, gold results up to 1.025 ppm Au, gallium results up to 49 ppm Ga, zinc results up to 12% Zn, and lead results up 3.81% Pb.

 

• The Company shortly will be undertaking detailed geological mapping of the most prospective areas to guide the next exploration steps which may include geophysical surveys and diamond drilling.

 

BACKGROUND

Pilot North is located approximately 15 km northwest of the Company’s co-flagship Pilot Mountain project and shares the same road access. Pilot North comprises five distinct areas: Copper Head, Western Metals, Muller Mountain, Tungsten Valley and Jasper. The Company considers that these all represent genetically related tungsten-copper-polymetallic skarn mineralisation at the contacts of granitic intrusions with limestones of the Luning Formation, a similar geological setting to the deposits at Pilot Mountain.

Following initial reconnaissance and staking of Pilot North, the Company’s expert geological consultant, Dr Lawrence Carter, undertook detailed geological mapping and sampling across the Project to characterise the mineralisation and to develop strategies to advance Pilot North as a satellite to the Company’s flagship Pilot Mountain project. From this fieldwork, 92 rock chip sampled were assayed at ALS USA Inc laboratories using the following analytical packages: ME-MS61 for multielement, Au-ICP21 for gold, ME-XRF15c for high grade WO₃ and  Ag/Cu/Pb/Zn-OG62 for overlimit samples (see Table 1).

Table 1. Summary of Rock Chip Sample Assay Results

SAMPLE	Au	Ag	Ag	Cu	Cu	Pb	Pb	Ga	Zn	Zn	WO3
Unit	ppm	ppm	ppm	ppm	%	ppm	%	ppm	ppm	%	%
ALS Lab Method	Au-ICP21	ME-MS61	Ag-OG62	ME-MS61	Cu-OG62	ME-MS61	Pb-OG62	ME-MS61	ME-MS61	Zn-OG62	ME-XRF15c
LCCH01		0.13		8		3		23	25
LCCH02		52.90			2.58	12		31	336
LCCH03		81.20			4.01	4		23	1,990
LCCH04		55.20			3.34	4		13	1,450
LCCH05		3.13		1,840		3		17	188
LCCH06			115		2.29	155		11	554
LCCH07		86.10			2.56	5		12		1.17
LCCH08		2.61		754		8		17	420
LCCH09		0.45		141		13		32	373
LCCH10		30.70			5.56	251		12		1.15
LCCH11	1.03	97.00			2.80	4		24	578
LCCH12	0.05	12.05		3,910		3		24	182
LCCH13	0.01	5.45		1,860		207		18	648
LCCH14			201		14.65	2,850		2		1.30
LCCH15			708	7,970			3.81	17	2,880
LCCH16			231	2,080		6,260		17	3,060		0.19
LCCH17			538	658			3.19	18	9,210		0.59
LCCH18	0.05	48.50			2.27	130		24	236
LCCH19		3.46		188		209		16	89
LCCH20		2.33		1,120		48		16	161
LCCH21		0.61			5.30	13		1	733
LCCH22		1.22		6,020		19		34	141
LCCH23		0.44			7.22	7		14	442
LCCH24		13.50		2,320		8		15	46
LCCH25		1.85		918		10		18	47
LCCH26		2.94		624		84		29	170
LCCH27		0.75		601		11		18	31
LCJA01		41.00		123		1,520		14	46
LCJA02		0.30		58		16		17	6
LCJA03		1.04		65		19		6	11
LCJA04		0.21		41		14		1	28
LCJA05		4.38		1,055		8		2	981
LCMM01	0.01	0.93		429		3		20	384
LCMM02		4.44		7,180		5		16	753
LCMM03		1.26		1,205		5		11	291
LCMM04	0.01	4.05		2,290		13		19	179
LCMM05		0.76		286		5		20	73
LCMM06		6.22		1,140		11		21	68
LCMM07	0.00	1.62			1.76	4		31	346		0.14
LCMM08		0.19		172		4		34	23
LCMM09		24.50			1.87	4		10		1.36
LCMM10		0.81		857		6		22	633
LCMM11	0.10		319		6.78	1,530		7	2,080		0.14
LCMM12		1.24		222		11		18	336
LCMM13		1.81		463		18		14	118
LCMM14		0.26		89		13		16	139
LCMM15		0.35		143		13		13	116
LCMM16		5.59		1,405		27		16	306
LCMM17	0.12	79.90			2.08	457		3	4,590		0.11
LCMM18		2.77		670		73		17	1,665
LCMM19		59.00			3.05	691		12		1.57
LCMM20		59.80			1.29	78		7	2,360
LCMM21	0.00	8.35		1,470		231		2		1.03
LCMM22		84.90			9.21	102		14		12.00	0.46
LCMM23			496		6.70	1,920		3	4,660
LCMM24			215		8.86	31		7	9,990		0.19
LCMM25		6.59		1,450		47		22	250
LCMM26			284		6.92	39		8		1.61
LCMM27		2.43		2,530		21		18	1,375
LCMM28		37.80			2.95	84		32	1,265
LCMM29		0.40		155		3		46	233
LCMM30			133		2.99	688		36	6,560		0.36
LCTV01		0.49		248		32		18	167		0.24
LCTV02		2.32		791		23		50	209
LCTV03		30.90		8,120		986		34	534		0.19
LCTV04		3.69		1,290		243		10	551
LCTV05		24.50		351		1,810		9	335		0.27
LCTV06		14.15		1,770		14		16	101
LCTV07		0.48		354		15		16	64
LCWM01			276		4.51	1,275		35	2,880
LCWM02		7.19		3,220		32		44	358
LCWM03		25.10			3.09	9		16	1,875
LCWM04	0.07		132		6.89	31		12	1,120
LCWM05		0.61		395		4		12	62
LCWM06	0.01	33.80			2.48	23		10	1,085
LCWM07	0.01	6.81			6.27	3		6	1,955
LCWM08		19.30			4.12	3		20	6,890
LCWM09		0.34		730		1,030		3		1.52
LCWM10	0.04	0.80		7,620		6		18	3,270
LCWM11	0.18	68.50		668		8,030		2	980
LCWM12	0.53	14.55		304		1,705		2	234
LCWM13	0.13	71.60		131		2,460		1	209
LCWM14	0.53	94.40			1.06	3,840		1	284
PZMM01		91.20			10.60	21		10	2,700
PZMM02		0.64		361		22		24	75
PZMM03		0.91		740		8		28	85
PZMM04		0.16		65		12		18	83
PZMM05		0.19		49		6		22	100
PZMM06		0.11		23		10		19	73
PZMM07	0.05	24.20		3,740		7		27	241		0.36
PZMM08		25.10		3,900		7		27	257		0.40
HRWM0625		0.35		237		11		42	253

Table Notes : Summary of certificated assay results provided by accredited laboratory ALS USA Inc. ppm: parts per million, 10,000 ppm = 1%

 

MEDIA

Figure 1. Example of copper oxide rich garnet skarn outcropping on the Pilot North project.

 

 

Figure 3. Visible light and ultraviolet (UV) light view of copper oxide and scheelite rich skarn from the Muller Mountain area.

 
 

PROPERTY OWNERSHIP

Guardian Metal holds a royalty free, 100% interest in the Pilot North Project, through its wholly-owned Nevada operating company, Golden Metal Resources LLC.

 

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 a 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 to provide technical support.

1. Company Announcement, Pilot North: Enlargement following Assay Results, dated 13 August 2025
   ( https://polaris.brighterir.com/public/guardian_metal_resources/news/rns/story/w106z3r )

 

2. Company Announcement, Pilot North Tungsten Project Acquired via Staking, dated 7 July 2025   ( https://polaris.brighterir.com/public/guardian_metal_resources/news/rns/story/wveg0px )

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).

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 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 20 7213 0880
Shard Capital Partners LLP Lead Broker Damon Heath/Erik Woolgar	Tel: +44 (0) 20 7186 9000

 

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