Yarraloola Copper Project

Yarraloola features historical copper mine workings that have been partially tested in historical drilling, complemented by recently identified gold in rock chips at surface. When combined with excellent additional targets identified by one of the state’s leading geophysics groups, and the lack of modern systematic exploration for 50 years, the Company considers Yarraloola to be a very attractive project.

The wider Pilbara region is considered highly prospective for gold and base metals. Noteworthy deposits include Sulphur Springs, Paulsens, Mount Olympus, Whim Creek and Hemi (see map), demonstrating the gold and base metals potential of the Pilbara region.

The Geological Survey of Western Australia (Maitland, 1909) reported that Yarraloola was first discovered in 1907 and was subsequently mined at a small scale for copper in 1963 yielding 2.8t of copper ore and cuprous concentrate at an average grade of 14.6% copper. The prospect is highlighted by a large extensive gossan in the vicinity of the historical mine with copper staining at surface.

While high copper grades were achieved in early surface sampling, limited systematic drilling completed by Great Boulder Mines Ltd (GBML) and WMC further identified the presence of interbedded volcanics and sediments with mineralisation that is anomalous for copper, silver, lead and zinc.

Better intercepts from historical drilling include:

• 32.7 m at 0.7% Cu, 0.3% Pb, 16.3g/t Ag, and 0.4% Zn in YD02 from 54.0 m;
• 13.5 m at 0.7% Cu, 0.9% Pb, 27.9 g/t Ag, and 1.9% Zn in YD06, from 148.1 m; and
• 14.1 m at 0.5% Cu, 0.2% Pb, 19.0 g/t Ag, and 0.2% Zn in YD01 from 46.9 m.

Drill collars, significant intercepts, and full historical assays for all holes retrieved and transcribed to date are provided in Appendix 1 of the ASX Announcement dated 28 April 2026.

WMC and Marston (1979) interpreted the mode of occurrence of mineralisation to be that of a Volcanogenic Massive Sulphide (VMS) system, a style of mineralisation that contributes significantly to global sources of base and precious metals including copper, lead, zinc, silver, and gold.