Galileo Mining Locks in Two PGM Drill Programs Across 8km of Untested Strike
Key Takeaways
- Galileo Mining has scheduled two drill programs at its 100%-owned Norseman Project before year-end 2026, with a 5,000m aircore campaign at North Callisto commencing in the last week of September and an RC program at Mission Sill following in November.
- The North Callisto target represents the first known mineralised outcrop within the Norseman Project Area, with rock chip sampling returning up to 1.87 g/t 3E just 2km north of the existing 17.5Mt @ 2.3 g/t PdEq Callisto resource.
- Prior drilling flanking the North Callisto outcrop has already returned 62m @ 0.22 g/t 3E to the north and 100m @ 0.19 g/t 3E to the south, providing geological context for the upcoming aircore campaign.
- The Mission Sill RC contract is already signed, targeting two defined zones of PGM anomalism spanning 1.4km and 2.0km of strike respectively, with shallow sulphide mineralisation confirmed in both zones and drill hole NRC516 finishing in open mineralisation.
- An 8km corridor of untested strike north of the Callisto resource remains to be systematically evaluated, framing the scale of the exploration opportunity beyond these two immediate programs.
Two drill programs locked in as Galileo targets PGM discovery at Norseman
Galileo Mining (ASX: GAL) has announced two upcoming drill programs at its 100%-owned Norseman Project in Western Australia, targeting high-priority platinum group metal (PGM) prospects before year-end. An aircore program at the North Callisto target is scheduled to commence in the last week of September 2026, with a separate RC (reverse circulation) drilling program at the Mission Sill prospect to follow in November 2026.
Both programs are underpinned by the company’s existing 17.5Mt @ 2.3 g/t PdEq Callisto resource, which anchors the project’s known mineralisation. The announcements represent a continuation of Galileo’s multi-campaign exploration strategy across several priority targets.
Brad Underwood, Managing Director
“In line with our exploration strategy of multiple targeted drill campaigns, we are preparing to undertake new drilling with two more programs scheduled before the end of the year. We believe this approach maximises the chances of making a mineral discovery through comprehensive target generation work followed by drill programs concentrating on areas of greatest prospectivity.
Prospecting work has identified mineralised outcrop just two kilometres from our 17.5Mt Callisto resource. And diamond drilling beneath the resource has shown that Callisto is not a unique mineralised occurrence in the area. These results improve the probability of further discoveries at our Norseman project and we intend to thoroughly pursue the opportunities for a breakthrough result with our upcoming drill programs.”
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North Callisto aircore program — what the target looks like and why it matters
The first program is a 5,000m aircore campaign targeting an area of outcropping mineralisation 2km north of the Callisto resource. Rock chip sampling from the area has returned results of up to 1.87 g/t 3E (where 3E refers to palladium, platinum, and gold combined, expressed in grams per tonne).
The significance of this target lies in what it represents for the broader project. The Callisto resource sits 100m undercover, meaning it has no surface expression. The North Callisto outcrop is the first known occurrence of mineralised outcrop within the Norseman Project Area, making it a meaningful exploration signal.
Prior drilling in the vicinity supports the prospectivity of the zone. A hole drilled 140m north of the outcrop returned 62m @ 0.22 g/t 3E, while a hole 170m to the south recorded 100m @ 0.19 g/t 3E. These results were reported in prior ASX announcements and provide geological context for the upcoming program.
The interpreted geological structure in the area, based on resource drilling at Callisto, suggests east-dipping stratigraphy. This implies that potential mineralisation may extend beneath and to the east of the outcrop, where no drilling currently exists — and that is precisely what the aircore campaign is designed to test.
Additional drilling is also planned further north along strike, following the prospective geological contact zone. The announcement references 8km of untested strike north of the Callisto resource remaining to be systematically evaluated. Figures released with the announcement illustrate the rock chip assay locations relative to prior drill holes and the broader gravity-defined prospective trends across the Norseman project.
Understanding PGMs — why palladium and platinum matter to investors
Platinum group metals are a family of rare, industrially critical elements that includes palladium and platinum. They are primarily used in catalytic converters in internal combustion engines, hydrogen fuel cells, and a range of electronic applications. Supply is heavily concentrated in South Africa and Russia, which means Australian discoveries carry strategic significance for diversifying global supply.
The Callisto deposit has been described as the first deposit of its type identified in Australia, analogous in mineralisation style to South Africa’s Platreef-style deposits. That comparison matters because the Platreef is one of the world’s most significant PGM ore systems.
The Callisto resource itself emerged from a high-grade Norseman discovery that established palladium and platinum mineralisation in a deposit style previously unseen in Australia, providing the geological foundation from which these new targets have been generated.
For investors, the combination of limited domestic supply, growing industrial demand (particularly from hydrogen and emissions-reduction technology), and a genuinely novel deposit style in a stable mining jurisdiction makes PGM exploration at Norseman worth tracking closely.
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Mission Sill RC program targets two zones of PGM anomalism
An RC drilling contract has been signed for the Mission Sill prospect, with the program scheduled to commence in November 2026. The campaign follows a series of positive PGM intercepts reported in the 10 August 2026 ASX announcement, with mineralisation encountered on each drill line completed.
Prior PGE intercepts at Norseman across multiple drill lines underpinned the decision to contract RC drilling at Mission Sill, with each completed section returning mineralisation and shallow sulphide confirmation narrowing the focus to the two zones now scheduled for follow-up.
The three key prior intercepts from Mission Sill are:
- 36m @ 0.31 g/t 3E including 4m @ 0.50 g/t 3E (NAC833)
- 20m @ 0.30 g/t 3E including 4m @ 0.56 g/t 3E (NAC840)
- 16m @ 0.30 g/t 3E including 1m @ 0.54 g/t 3E (NAC851)
Exploration focus at Mission Sill has now been refined to two consistent zones of PGM anomalism, defined through multiple rounds of aircore drilling. The November RC program will target mineralised zones both down-dip and along strike within each zone.
Shallow sulphide mineralisation has already been confirmed on sections within both zones from very limited December 2025 RC drilling. Drill hole NRC516 finished in mineralisation, indicating that the mineralisation remains open at depth.
| Zone | Strike Length | Status | RC Drill Focus |
|---|---|---|---|
| Zone A | 1.4km | Shallow sulphide mineralisation confirmed | Down-dip and along strike |
| Zone B | 2.0km | Shallow sulphide mineralisation confirmed | Down-dip and along strike |
The two zones span 1.4km and 2.0km of strike respectively, providing a substantial footprint for the November program to test. With the RC contract already signed and positive prior results across both zones, Mission Sill shapes as the more advanced of the two targets heading into the second half of 2026.
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