Tivan Ltd. has completed a mineral resource estimate (MRE) upgrade for its Speewah fluorite project in Western Australia, converting the majority of the deposit into the higher-confidence Indicated category.
The updated MRE reaffirms Speewah as one of the largest high-grade fluorite deposits globally. The project now hosts a JORC-compliant Indicated and Inferred Resource of 45 million tonnes at 7.8 per cent at a 2 per cent cut-off grade, containing 3.5 million tonnes of calcium fluoride.
This represents a 4 per cent increase in total tonnage compared to the previous February 2026 estimate, with overall grade and contained fluoride remaining consistent.
The updated resource also features a high-grade domain of 8.6 million tonnes at 22.3 per cent calcium fluoride at a 10 per cent cut-off grade, containing 1.9 million tonnes of calcium fluoride.
The resource conversion follows a 14,000-metre Stage Two drilling campaign completed in October 2026, which focused on infill, metallurgical, geotechnical, and exploration drilling.
High-grade infill intercepts included 76 metres at 21.6 per cent calcium fluoride from surface, incorporating 22 metres at 39 per cent calcium fluoride
The transition of the resource to the Indicated classification provides the necessary foundation for estimating formal ore reserves, mine planning, and production scheduling. Tivan is currently advancing a detailed feasibility study (DFS) targeting a mining and processing facility to produce export-grade acid grade fluorspar.
“We are very pleased to have finalised the Mineral Resource Estimate for Speewah, providing the geological foundation that will underpin our definitive feasibility study,” said Tivan Executive Chairman Grant Wilson.
“Our mining plan is now based on 100 per cent Indicated category, which will enable the optimisation of Ore Reserves, as we head toward a final investment decision for Australia’s first fluorite project next year.”
Potential remains for further resource expansion along strike and at depth, with several mineralised vein targets remaining open.
