RareX Limited (ASX: REE), a company focused on rare earths and gallium, niobium as well as scandium in hard rock carbonatites, has announced promising results from the first phase of exploration at its Mt Mansbridge heavy rare earths project, located 40km southwest of Northern Minerals’ Browns Range project. The exploration team has identified multiple mineralised veins with significant Total Rare Earth Oxide (TREO) concentrations and high Heavy Rare Earth Oxide (HREO) content, including notable Dysprosium-Terbium (DyTb) values.
The exploration program involved the analysis of 39 rock chip samples and over 1000 soil samples. At the Sigma Prospect, rock chip samples returned values up to 2.7% TREO, with 94% HREO and 13% DyTb. Furthermore, the exploration team discovered three newly mineralised areas with sample results including 1.7% TREO, 78% HREO and 10% DyTb. These results highlight the potential for significant heavy rare earth mineralisation within the Mt Mansbridge project area. Extension soil sampling at Mt Mansbridge confirms heavy rare earths (HRE) unconformity target.
Chairman Jeremy Robinson commented on the success of the exploration efforts, stating that the field team’s approach has led to the discovery of multiple HREO occurrences at the Mt Mansbridge Project. He emphasised that the systematic approach has enabled the team to focus on the most promising areas for mineralisation, delivering outstanding initial results that underscore the HRE potential of Mt Mansbridge. Robinson further noted that hard rock HRE deposits are among the most challenging to find, and Mt Mansbridge possesses the necessary characteristics to host such a deposit.
The company plans to continue exploration activities at Mt Mansbridge, focusing on defining the extent and grade of the identified mineralisation. Further results will be delivered in the future. Exploration at Mt Mansbridge is targeting the same style of mineralisation found at Northern Minerals Browns Range – hydrothermal HRE mineralisation in the Paleoproterozoic Tanimi Group basement rocks, as well as unconformity-related HRE mineralisation at the base of the Birrindudu Basin.
