St George lifts Araxá rare earths–niobium resource 75% to 70.91Mt as higher-confidence inventory jumps 218%

St George Mining upgraded the Araxá rare earths–niobium resource in Brazil by 75% to 70.91Mt at 4.06% TREO and 0.62% Nb₂O₅. Measured and indicated tonnes rose 218% to 29.49Mt, supporting economic studies.

St George Mining (ASX: SGQ) has delivered a major upgrade to its Araxá Rare Earths–Niobium Project in Minas Gerais, Brazil, increasing the project’s mineral resource estimate by 75% to 70.91 million tonnes grading 4.06% total rare earth oxides (TREO) and 0.62% niobium pentoxide (Nb₂O₅).

The updated estimate also materially improves confidence: the Measured and Indicated category rose 218% to 29.49Mt at 4.56% TREO and 0.75% Nb₂O₅, while the Inferred component totals 41.42Mt.

SRK completed the updated estimate as the project targets economic studies

The new mineral resource estimate was prepared by SRK Consulting on behalf of St George and reported under the JORC Code (2012) framework.

St George said the increase in higher-confidence tonnes provides a stronger foundation for robust economic studies, while the larger inferred base supports continued resource definition drilling aimed at converting more material into Measured and Indicated categories.

Chairman: upgrade positions Araxá among leading rare earths and niobium development opportunities

Executive Chairman John Prineas described the upgrade as a milestone for the company, saying the revised MRE compares more favorably with the scale of rare earths and niobium deposits controlled by major listed peers such as MP Materials and Lynas Rare Earths.

He also framed Araxá as a near-term development candidate amid Western efforts to build more secure critical minerals supply chains, adding that St George’s fully funded 24/7 drilling continues and has helped validate historical drilling, extend known mineralization zones and advance newer targets such as East Araxá.

Why it matters

A 75% resource lift—combined with a sharp increase in Measured and Indicated tonnes—can materially improve the credibility of early-stage project economics and de-risk development planning. For Araxá, the larger, higher-confidence inventory strengthens the platform for forthcoming studies while ongoing drilling aims to further expand and upgrade the resource base.