Mission Sill Yields Up to 0.88 g/t Combined PGE in Latest Galileo Drilling

Exploration Update at Norseman

Galileo Mining Ltd (ASX:GAL) has released promising results from its ongoing exploration at the 100% owned Norseman project in Western Australia. The latest reverse circulation (RC) drilling campaign, conducted in December 2025 at the Mission Sill prospect, has returned consistent zones of anomalous palladium, platinum, copper, and nickel sulphides. These findings reinforce the prospectivity of the area for platinum group elements (PGEs) and associated base metals.

The Mission Sill mineralisation occurs within discrete intrusions and displays sulphide distributions similar to those found at the nearby Callisto resource, discovered in 2022. Notably, the sulphide zones remain open both along strike and at depth, suggesting the potential for higher-grade mineralisation yet to be delineated. Key intercepts from the RC drilling include 8 metres at 0.42 g/t combined Pd, Pt, and Au (3E) from 24 metres, including 2 metres at 0.88 g/t 3E, and 17 metres at 0.36 g/t 3E from 84 metres, highlighting the continuity of mineralisation.

Deep Diamond Drilling Beneath Callisto

Complementing the RC drilling, Galileo has completed a significant diamond core hole beneath the Callisto deposit, reaching a depth of 772 metres. This hole was designed to test the footwall area beneath the known resource and to collect metallurgical samples for further test work. While assay results from this deep drilling are still pending, the geological logging indicates the presence of disseminated sulphides within pyroxenite and gabbronorite intrusions, which may hold further PGE potential.

Callisto remains a cornerstone discovery for Galileo, with an initial mineral resource estimate reported in 2023 of 17.5 million tonnes grading 1.04 g/t combined PGEs plus rhodium (4E), alongside notable nickel and copper grades. The deposit’s mineralisation style is analogous to South Africa’s Platreef deposits, a globally significant PGE province, underscoring the strategic importance of the Norseman project.

Strategic Position and Future Plans

Galileo’s tenure at Norseman covers an extensive 255 square kilometres, encompassing multiple prospects including Mission Sill, Jimberlana, and Callisto. The company is well positioned with over $9 million in funding as of the last quarter, providing a solid financial base to advance exploration despite current market volatility.

Looking ahead, Galileo plans to conduct further RC and aircore drilling programs to expand the known PGE horizons and refine target zones, particularly where previous drilling focused primarily on nickel laterite and did not effectively test the PGE prospective horizons. The company’s exploration strategy aims to build on the breakthrough represented by Callisto and to unlock additional discoveries within this emerging Australian PGE province.

Managing Director Brad Underwood expressed optimism about the results, noting the encouraging nature of the Mission Sill assays and the potential for richer grades within the mineralised system. The ongoing metallurgical test work and assay results from the deep diamond drilling will be critical in defining the economic potential of the project.