Mount Ridley Mines has extended the high-grade scandium footprint at its Block 2 Resource with Phase 1 re-assay results, revealing significant mineralisation beyond current resource limits and setting the stage for resource growth.
- Phase 1 re-assay reveals scandium grades well above 86.9 ppm average
- Mineralisation open and continuous in all directions beyond Block 2
- Scandium coincides with rare earth and gallium resources at Grass Patch
- Phase 2 re-assay program underway with 2,000 historical pulps
- Scandium supply constraints bolster strategic value of Australian resource
Phase 1 Re-Assay Uncovers Broader High-Grade Scandium Zones
Mount Ridley Mines Ltd (ASX:MRD) has delivered a compelling update from its Grass Patch Project, confirming that high-grade scandium mineralisation at Block 2 extends significantly beyond the existing resource boundaries. The Phase 1 re-assay program, which revisited historical drill samples rather than new drilling, returned broad intercepts of scandium oxide (Sc2O3) grades well above the current Block 2 average of 86.9 ppm. Notable results include 19 metres at 127.68 ppm and 24 metres at 114.54 ppm Sc2O3, with multiple holes ending in mineralisation, signalling strong continuity and thickness near surface.
Resource Expansion Potential Evident in All Directions
The re-assay data reveals that the scandium system at Block 2 remains open north, south, east, and west, with particularly encouraging thick, high-grade intersections along the southern and eastern margins. This suggests the core of the mineralised system is larger than previously defined and ripe for resource growth. The northern and western extensions, although less densely drilled, also show promising grades, providing multiple high-priority targets for follow-up drilling to convert unclassified mineralisation into formal resource inventory.
Strategic Multi-Critical Minerals District
Block 2 is not just a scandium story. It hosts a rare earth element (REE) resource of 87.18 million tonnes at 947 ppm total rare earth oxides (TREO) and a gallium resource of 372.3 million tonnes at 40.4 ppm Ga2O3. The spatial overlap of scandium with these critical minerals enhances the project's strategic appeal, positioning Grass Patch as a multi-commodity critical minerals hub within a Tier 1 Australian jurisdiction. This is especially pertinent given global scandium supply constraints following China's export licensing restrictions imposed in 2025, which have tightened Western access and increased demand forecasts in aerospace, fuel cells, and additive manufacturing.
Phase 2 Re-Assay and Resource Update on Horizon
With the Phase 1 dataset now complete for both Block 1 and Block 2, Mount Ridley is preparing an updated Mineral Resource Estimate (MRE) that aims to upgrade the current inferred classification and better define the scandium system’s scale. Phase 2 of the re-assay program is already underway, targeting approximately 2,000 additional historical pulps out of a total 14,000 unassayed samples. This low-cost strategy to expand the resource footprint leverages existing drill material and could materially increase contained scandium tonnage without the immediate need for new drilling.
Mount Ridley’s Position Amid Global Supply Pressures
Scandium remains a critical mineral with limited global production, dominated by China, Russia, and a handful of byproduct sources. The recent export licensing by China has heightened supply risk for Western markets, pushing demand growth forecasts to around 14.5% annually through 2031. Mount Ridley’s growing scandium resource, located in an allied-nation-friendly jurisdiction, thus gains strategic significance. The company’s focus on further resource expansion and downstream processing pathways aligns with this market dynamic, potentially positioning Grass Patch as a key supplier to aerospace, semiconductor, and clean energy sectors.
Bottom Line?
Mount Ridley’s expanded scandium footprint at Block 2 reinforces Grass Patch’s standing as a critical minerals powerhouse, but upcoming resource upgrades and Phase 2 re-assays will be key to validating the scale of this opportunity.
Questions in the middle?
- How will Phase 2 re-assay results impact the upcoming Mineral Resource Estimate update?
- What are the timelines and potential hurdles for converting inferred resources into higher confidence categories?
- How might global scandium supply constraints influence Mount Ridley’s strategic partnerships and downstream processing plans?