Galileo Mining Identifies New Drill Target Near Callisto with Promising Rock Chip Assays

New Rock Chip Results Define Drill Target Near Callisto Deposit

Galileo Mining Ltd (ASX:GAL) has revealed fresh exploration progress at its 100% owned Norseman project in Western Australia, spotlighting a new drill target just 2 kilometres from the flagship Callisto deposit. Rock chip sampling over a sporadic outcrop on a gently sloping plain at the North Callisto prospect returned assays up to 1.87 g/t combined palladium, platinum and gold (3E), with mineralised outcrop extending over approximately 40 metres of strike.

These surface results complement historical drilling in the vicinity, which recorded anomalous zones including 62 metres at 0.22 g/t 3E about 140 metres north, and 100 metres at 0.19 g/t 3E roughly 170 metres to the south. Geological interpretation based on the east-dipping stratigraphy at Callisto suggests that mineralisation could continue beneath and to the east of the outcrop, an area yet to be drilled. Galileo plans to launch an initial aircore drilling program to test this prospective zone.

Callisto Resource Anchors Norseman’s PGE-Nickel-Copper Potential

The Norseman project hosts the Callisto deposit, a landmark discovery in Australia analogous in style to South Africa's Platreef deposits. The maiden resource estimate, reported in 2023, tallies 17.5 million tonnes grading 1.04 g/t 4E (palladium, platinum, gold, rhodium) alongside 0.20% nickel and 0.16% copper, equating to 2.3 g/t palladium equivalent or 0.52% nickel equivalent. Metallurgical test work to date indicates that the mineralisation is amenable to conventional crushing, milling and flotation, supporting reasonable prospects for eventual economic extraction.

Galileo’s tenure covers 255 square kilometres around Norseman, including regional prospects such as Jimberlana and Mission Sill, which are also prospective for PGE-nickel-copper-cobalt mineralisation. The company continues to advance exploration with detailed geophysical surveys and sampling programs, aiming to expand the footprint of mineralisation beyond Callisto.

Exploration Techniques and Historical Context Reinforce Prospectivity

The rock chip sampling was conducted on a reconnaissance basis with rigorous quality control measures, including blanks, standards and duplicates, and analysed by independent laboratories using fire assay and ICP-MS techniques. The samples were collected from fresh to partially weathered ultramafic and mafic outcrops, consistent with the geological setting favourable for PGE and base metals.

Historical exploration dating back to the 1960s has targeted nickel-copper sulphides and gold in the region, with various companies delineating soil anomalies and shallow resources. Galileo has built on this legacy with modern geophysical surveys, including aeromagnetic, induced polarisation and gravity data, to refine targets and guide drilling campaigns.

Upcoming Drilling to Test New North Callisto Target

With the new rock chip results confirming mineralised outcrop and geological models indicating potential extensions beneath surface, Galileo is preparing for aircore drilling to test the North Callisto prospect. This drilling will complement ongoing programs at Mission Sill and South Callisto, where assays are pending. The company’s strategic approach aims to leverage its strong cash position and technical expertise to unlock further value from the Norseman project’s unique PGE-nickel-copper system.

Galileo’s exploration updates continue to reinforce Norseman’s standing as a rare Australian analogue to the world-class Platreef deposits, with the potential for multiple stacked mineralised sills and dykes across a broad prospective area. The imminent drilling results will be critical in assessing the continuity and economic potential of the newly identified North Callisto target.