Maritana Minerals Limited has declared a maiden underground Ore Reserve for the Rose Hill Project near Coolgardie, Western Australia, delivering 420 kilotonnes at 2.34 grams per tonne gold for 31,600 ounces of contained metal.

The new underground reserve lifts Maritana’s total group Ore Reserves by 31,600 ounces to 235,600 ounces of gold compared to the 204.1 thousand ounces reported on August 19, 2026.

Alongside the reserve declaration, the company updated the underground Mineral Resource for Rose Hill to 524 kilotonnes at 4.49 grams per tonne gold for 76,000 ounces using a reduced cut-off grade of 1.0 gram per tonne gold. The open pit Mineral Resource remains unchanged at 287 kilotonnes at 1.99 grams per tonne gold for 18,000 ounces. An additional underground Inferred Mineral Resource of 194 kilotonnes at 4.53 grams per tonne gold for 28,000 ounces was excluded from the reserve calculation, providing potential resource upside at depth.

“Declaring a maiden Ore Reserve for the Rose Hill Underground is a significant milestone for Maritana and lifts our Ore Reserve inventory to 236 koz. It confirms that Rose Hill stands up economically and moves the Project a meaningful a step closer to development.”

— Grant Haywood, Managing Director and CEO

Ore extracted from Rose Hill is scheduled to be hauled to the Black Swan Processing Hub, where conversion work to establish a dedicated gold processing facility is underway ahead of targeted first gold production in the second half of calendar 2027.

Read the full announcement: Rose Hill Mineral Resource and Maiden Ore Reserve Update