Lion Rock Minerals has revealed high-grade rare earth element mineralisation starting at surface at its Minta Project in Cameroon, with assays showing up to 21.15% TREO in saprolite and a magnet-rich rare earth basket. A large-scale drilling campaign is underway to further define this significant discovery.
- High-grade rare earth mineralisation confirmed from surface
- Up to 21.15% Total Rare Earth Oxides (TREO) in saprolite
- Rare earth basket rich in NdPr and DyTb critical for magnets
- 761-hole alluvial drilling campaign completed with 3,666 samples
- Diamond drilling planned to test depth extent of mineralisation
High-Grade Rare Earths Surface Discovery
Lion Rock Minerals Limited (ASX:LRM) has announced a breakthrough at its Minta Rare Earth and Rutile Project in Cameroon, reporting high-grade rare earth element (REE) mineralisation starting right from surface. Laboratory assays from retained auger drill samples confirm multiple significant intervals of Total Rare Earth Oxides (TREO), with standout results including 2.3 metres at 4.54% TREO and a remarkable 0.3 metres grading 21.15% TREO within the saprolite layer. These grades are reported on an in-situ basis, marking a strong early indicator of a shallow, high-grade rare earth system open at depth.
Strategic Rare Earth Basket Composition
The rare earth mineralisation is notably magnet-rich, featuring neodymium and praseodymium (NdPr) that comprise 21–24% of TREO in key intervals. These elements are vital for permanent magnets used in electric vehicle motors and wind turbines. The deposit also contains dysprosium and terbium (DyTb), heavy rare earths critical for maintaining magnet strength at high temperatures, which contribute 0.6–1.6% of TREO. Every rare earth element assayed, along with scandium, appears on the 2025 U.S. List of Critical Minerals, underscoring the strategic value of the discovery.
Extensive Drilling Campaign and Next Steps
Complementing these assay results, Lion Rock has completed a substantial 761-hole alluvial drilling campaign across approximately 50 kilometres, generating 3,666 samples. The first 638 samples are currently being processed, with results expected to be released in batches over the coming weeks. The auger drilling, however, has limitations in penetrating the saprolite layer, prompting the company to expedite mobilisation of diamond drilling to test the depth extent of the mineralisation.
CEO Theuns de Bruyn highlighted the transformational nature of this discovery, stating that the results represent a significant step change in both scale and strategic importance for the Minta Project. He emphasised the dual focus on rare earths and rutile, with the latter supported by a strategic relationship with Tronox. The company is also advancing mineralogical and petrological test work to better understand the mineralisation and recovery potential.
Technical Validation and Mineralogical Insights
The assays derive from a carefully curated retained sample program, with 90 valid full-suite ICP-OES assays covering 30 holes. Zero-cut-off whole-hole averaging reveals that eight of 15 continuously assayed holes average above 1.0% TREO over their full drilled depth, with mineralisation consistently starting at surface and extending through shallow profiles. Mineralogical studies including XRF, XRD, and QEMSCAN link the chemical assays to mineral hosts such as monazite, confirming the potential for beneficiation and product development.
The project’s mineralisation style is shallow and near-horizontal, typical of residual and alluvial heavy mineral systems, with vertical drilling providing unbiased sampling. The extensive QA/QC protocols and competent person sign-off by Chantelle Obermeyer support the reliability of the results.
Implications for the Minta Project’s Strategic Position
This rare earth discovery adds a new dimension to Lion Rock’s existing rutile-focused portfolio, potentially positioning Minta as a world-class dual commodity project. The presence of critical magnet rare earths aligns with growing global demand amid supply chain concerns, particularly given the concentration of heavy rare earth supply in China.
With further assay batches pending and diamond drilling imminent, the market will be watching how these developments translate into resource upgrades and project economics. The combination of scale, grade, and strategic mineral composition could elevate the Minta Project’s profile in the critical minerals sector.
Bottom Line?
Upcoming diamond drilling and ongoing assay results will be pivotal in defining the true scale and economic potential of this rare earth discovery at Minta.
Questions in the middle?
- Will diamond drilling confirm the vertical extent of high-grade rare earth mineralisation beyond auger limits?
- How will mineralogical test work influence the recoverability and processing pathways for the monazite-hosted rare earths?
- What impact will the strategic magnet rare earth content have on potential off-take or partnership opportunities?