Core Energy Reports High-Grade Rare Earth Assays with Up to 41% Magnetic REO at Campo Largo, Brazil

High-Grade Rare Earth Oxides Confirmed in Early Sampling

Core Energy Minerals Ltd (ASX:CR3) has delivered promising assay results from reconnaissance sampling at its 100%-owned Campo Largo Rare Earth Element Project in Paraná, Brazil. The assays reveal Total Rare Earth Oxide (TREO) grades exceeding 1,000 ppm in multiple rock-chip samples, with Magnetic Rare Earth Oxides (MREO) comprising up to 41% of the TREO content. This high proportion of magnet rare earths is particularly significant given their critical role in electric vehicles, green energy, defence, and technology sectors.

Among the standout samples, ROCO181 registered 1,272 ppm TREO with 46% MREO, while ROCO182 and ROCO402 recorded over 1,000 ppm TREO with 41-43% MREO, underscoring the project's potential for valuable rare earth mineralisation.

Extensive Weathered Saprolite Profiles Support Exploration Thesis

Field teams have identified widespread, deeply weathered saprolite clay profiles throughout the project area, a favourable host for ion-adsorbed clay-style rare earth deposits. These weathering profiles, developed over the Neoproterozoic Três Córregos Granite and surrounding metasedimentary rocks, provide a compelling geological setting for REE enrichment.

The Campo Largo project’s location around 60 kilometres southwest of Core Energy’s Tunas Project, where infill auger drilling is underway, suggests geological continuity of intrusive systems with elevated uranium, thorium, and potassium signatures. These characteristics may indicate well-developed weathering profiles with potential REE enrichment, aligning with Core Energy’s broader Brazilian exploration strategy. This complements the company’s recent discovery of extensive rare earth mineralisation at its Cummins Project in South Australia, where high-grade TREO and magnet rare earth oxide ratios were also reported broad laterally extensive REE.

Next Steps: Systematic Auger Drilling and Permitting Progress

Core Energy has completed initial landholder engagement and geological reconnaissance as part of its groundwork to advance the project. The company plans to commence systematic auger drilling and sampling this quarter, aiming to validate the reconnaissance assay results and delineate priority target zones across the Campo Largo tenements.

With no prior exploration recorded in the area, this phase represents the first detailed on-ground assessment. The company is concurrently progressing permitting and environmental clearances, critical to advancing field activities. This approach mirrors Core Energy’s methodical exploration ramp-up at its Itambe Project, acquired from Rio Tinto earlier this year, where systematic drilling is also planned for Q2 2026 exploration commenced at Itambe.

Early-Stage Exploration with Clear Potential but Pending Validation

While the assay results are encouraging, they come from early-stage reconnaissance sampling without QA/QC protocols applied, and no drilling has yet been conducted. Therefore, the data should be viewed as indicative rather than definitive. The absence of drilling means resource estimation remains premature, and the continuity of mineralisation at depth or laterally is untested.

Core Energy’s Managing Director Tony Greenaway emphasised the significance of the magnetic rare earth oxides in the samples and the extensive weathering profiles observed, highlighting the project’s strategic fit within the company’s critical minerals portfolio spanning Brazil and Australia.