Brazilian Rare Earths (ASX: BRE) has delivered a substantial expansion of its Monte Alto rare earths deposit with approximately 10,000 meters of new drilling revealing ultra-high-grade mineralisation beyond the existing resource boundaries and opening a northern growth corridor.
- New drilling expands Monte Alto mineralised envelope by ~50%
- Ultra-high-grade intersections up to 28.1% TREO over 8 meters
- Northern corridor confirmed as priority growth target
- High-grade co-products include niobium, scandium, tantalum, uranium
- Updated Mineral Resource Estimate targeted by end 2026
Drilling Campaign Extends Monte Alto’s Ultra-High-Grade Footprint
Brazilian Rare Earths (ASX:BRE) has materially expanded the Monte Alto rare earths deposit in Bahia, Brazil, through a diamond drilling campaign totalling around 10,000 meters. The new results push the mineralised envelope well beyond the February 2026 Mineral Resource Estimate (MRE) cut-off, adding significant scale and grade to the project.
Standout intersections include a southern down-dip extension of 25.6 meters at 17.4% total rare earth oxides (TREO), featuring an ultra-high-grade core of 8 meters at 28.1% TREO from 189 meters depth (hole MADD0230). This result underscores the deposit’s persistent high-grade nature at its current drilling limits, with mineralisation remaining open to the south and down plunge.
Multiple High-Grade Step-Outs Confirm Deposit Growth
The drilling campaign also delivered repeated step-out successes across several fronts. On the eastern down-dip margin, hole MADD0093 extended mineralisation with 9.4 meters at 21.8% TREO, including 6.2 meters at 25.4% TREO, confirming the system remains open and robust beyond prior model boundaries. Additional step-outs such as 6.6 meters at 21.2% TREO (MADD0219) and 6.8 meters at 19.1% TREO with a 2.2-meter core at 28.2% TREO (MADD0216) demonstrate multiple growth corridors rather than isolated lenses.
Collectively, these extensions have increased the interpreted geological envelope volume by approximately 50% compared to the February 2026 model, signalling a substantial step-change in the deposit’s scale.
Infill Drilling Strengthens Ultra-High-Grade Core Continuity
Infill drilling between established domains has reinforced the continuity and thickness of Monte Alto’s ultra-high-grade core. Highlights include 12.3 meters at 16.5% TREO with a 4.9-meter interval at 32.0% TREO (MADD0246) and 21.1 meters at 9.4% TREO including 3.5 meters at 25.6% TREO (MADD0233). Peak assays within these holes reached 36.5% TREO and NdPr oxide grades of up to 6.7%, alongside significant enrichments in heavy rare earths such as dysprosium and terbium.
These results confirm a vertically stacked and laterally persistent mineralised system extending from near surface to depth, providing a stronger foundation for an updated Mineral Resource Estimate planned for the end of 2026.
Northern Extension Emerges as New Priority Exploration Target
Perhaps most intriguingly, initial drilling in the far-north cluster of Monte Alto has revealed a new growth corridor characterised by ultra-high-grade rare earth and critical mineral mineralisation. Hole MADD0231 returned 0.9 meters at 25.9% TREO including 4,273 ppm yttrium oxide and notable concentrations of niobium, scandium, tantalum, and uranium oxides.
Recent near-surface intersections of lower grade but laterally extensive mineralisation further strengthen the prospectivity of this northern extension, which remains open and now accessible for a 1,400-meter follow-up drilling program aimed at bridging the main deposit and far-north discovery.
Implications for Mine Life and Production Upside
These exploration results lie entirely outside the current Mineral Resource and were not included in the August 2026 Monte Alto + Camaçari Scoping Study, which is based on drilling available up to February 2026. The new drilling therefore represents a clear growth pathway beyond the existing nine-year production case.
CEO Bernardo da Veiga highlighted the strategic significance, noting that the expanded mineralised volume and ultra-high-grade continuity could translate into mine life extension or increased annual production. The project’s multi-element signature, including high-grade co-products such as niobium oxide (up to 1.1%), scandium oxide, tantalum oxide, and uranium oxide, adds further value potential.
Next Steps in Resource Definition and Development
BRE is actively advancing a +5,000-meter drilling campaign targeting the northern, southern, and eastern growth fronts, alongside a 1,400-meter program to test the northern corridor. Concurrently, an updated JORC Mineral Resource Estimate for Monte Alto is targeted by year-end 2026.
Mine planning efforts will progress alongside resource updates to evaluate potential impacts on mine life and production rates, feeding into a forthcoming Pre-Feasibility Study. Meanwhile, exploration drilling at Velhinhas, 5 km south of Monte Alto, is ongoing, testing a +9 km rare earth corridor recently defined by the company.
Bottom Line?
Monte Alto’s expanding ultra-high-grade footprint and new northern corridor position BRE to significantly enhance project value, but conversion into updated resources and economic feasibility remain key milestones ahead.
Questions in the middle?
- Will the expanded mineralisation translate into a meaningful extension of Monte Alto’s mine life or higher production rates?
- How will the multi-element co-products influence the project’s economics and processing complexity?
- What geological controls underpin the new northern corridor’s mineralisation continuity and scale?