Guardian Metal Resources PLC Announces Discovery of Tremor Zone at Pilot Mountain

About this update from Guardian Metal Resources Plc

LONDON, UK / ACCESS Newswire / June 4, 2026 / Guardian Metal Resources plc (NYSE.A:GMTL)(LON:GMET)(OTCQB:GMTLF), a strategic exploration company focused on tungsten in Nevada, USA, is pleased to announce the discovery of the "Tremor Zone", a newly identified mineralised zone, within the Company's 100%-owned Pilot Mountain Tungsten Project ("Pilot Mountain" or the "Project"), located in Nevada, USA. Following analysis of geological and geophysical datasets, the Company's in-house technical team identified the Tremor Zone area as one of the Project's priority exploration targets. The area was also being evaluated as a potential location for key mine infrastructure as part of the ongoing Pre-Feasibility Study ("PFS"). Condemnation drilling was therefore required across this blind target area, and the initial drill hole, utilising a reverse circulation ("RC") drill rig, intersected multiple intervals of tungsten-rich skarn mineralisation. The PFS, which is nearing completion, is being supported by a U.S. Department of War $6.2m Defense Production Act Title III investment¹ in Guardian Metal's wholly-owned subsidiary, Golden Metal Resources (USA) LLC.As a critical defense metal, tungsten has been designated as a strategic priority by the U.S. government. Guardian Metal is focused on advancing its co-flagship projects, Tempiute and Pilot Mountain, to become key pillars of U.S. tungsten supply and help drive the reshoring of domestic mined 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.Highlights:The Tremor Zone is a newly discovered tungsten-skarn zone, identified by the Company's in-house technical team during condemnation drilling conducted at one of the Project's priority exploration targets in connection with the ongoing PFS.The initial Tremor Zone discovery drillhole, PMR26-077, intersected five distinct zones of tungsten-rich skarn mineralisation which include a highlight intercept of 13.68m of 0.31% WO3 from only 102.11m - 115.82m downhole (see Table 1) as well as 3.04m of 0.24% WO3 (from 83.83m), 4.56m of 0.16% WO3 (from 118.87m), 1.52m of 0.24% WO3 (from 143.26m), and 4.56m of 0.24% WO3 (from 152.4m). The Tremor Zone is classified as a blind discovery as it is obscured by alluvial cover and therefore does not directly outcrop a...

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