Galileo Mining Ltd has intersected anomalous platinum group metals across all seven drill lines completed during aircore drilling at the Mission Sill prospect within its 100% owned Norseman project in Western Australia.

The program successfully refined the prospective area into two consistent zones: Zone A, spanning a 1.4-kilometre strike length, and Zone B, covering a 2-kilometre strike length. Previous reverse circulation drilling conducted in December 2025 intersected sulphides with platinum group elements (PGMs) beneath both zones at the mafic and ultramafic rock contact.

Assay results from the June aircore campaign included wide intercepts such as 36 metres at 0.31 g/t 3E PGM from 4 metres in hole NAC833, which included a 4-metre section at 0.50 g/t 3E. Hole NAC840 returned 20 metres at 0.30 g/t 3E from surface, including 4 metres at 0.56 g/t 3E, while hole NAC851 intersected 16 metres at 0.30 g/t 3E from 28 metres, including a 1-metre interval at 0.54 g/t 3E.

By comparison, reverse circulation drilling at Mission Sill in March 2026 returned 8 metres at 0.42 g/t 3E in hole NRC518.

“Assays from our June aircore drill campaign at Norseman have returned significant PGM results on every line drilled at our Mission Sill prospect. These results strengthen the prospectivity of the target rock unit at the Mission Sill and allow us to focus on the most likely zones for the development of significant sulphide mineralisation.”

— Brad Underwood, Managing Director

In addition to the PGM results, first-pass reconnaissance aircore drilling at the Callisto South prospect identified a new gold zone. Hole NAC916 returned 4 metres at 1.22 g/t gold from surface in weathered regolith at a sheared contact between ultramafic rock and a quartz-diorite intrusion. The intercept contained low levels of silver and sulphur along a mapped contact extending over 1.5 kilometres.

Beyond the Norseman holdings, Galileo Mining has previously conducted exploration work at its Fraser Range project in Western Australia. Meanwhile, activity across the wider district includes Pantoro Gold Limited reporting high-grade drill intercepts at its nearby Norseman project.

Reverse circulation drilling is required at Zones A and B to determine the size and grade of the underlying sulphide mineralisation, while detailed mapping and sampling will precede further drilling at Callisto South. The next round of aircore and reverse circulation drilling across the Norseman project is scheduled to commence in September 2026.

Read the full announcement: PGM Target Zones Defined and New Gold Prospect at Norseman