Mount Ridley Mines Upgrades World's Largest JORC-Compliant Scandium Resource at Grass Patch Project

Published: Sep 04, 2026 10:14 (GMT+8)

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【SMM Rare Earth Flash】 Mount Ridley Mines (ASX: MRD) has upgraded the Inferred Mineral Resource at its Grass Patch Project in Western Australia to 958 million tonnes at 50.1 ppm (0.0050%) scandium, containing 47,000 tonnes of scandium metal — the world's largest publicly reported JORC-compliant scandium resource. The resource is hosted in regolith also bearing heavy rare earths and gallium.The company's proprietary Selectro™ hydrometallurgical process achieved recoveries of 80% for scandium, 83% for heavy rare earths, and 56% for gallium, enabling simultaneous recovery of three critical minerals from a single leach circuit. With only 20% of the tenure explored and 82 km of secondary targets identified, the upgrade reinforces Grass Patch's position as a strategically significant critical minerals project globally.

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