Tivan Limited has reported an upgrade in mineral resource estimate for its Speewah fluorite project in the Kimberley region of Western Australia, confirming the project as a globally significant fluorite resource.
The updated mineral resource estimate outlines a total resource of 43.2 million tonnes grading 8.3 per cent calcium fluoride, containing 3.6 million tonnes of calcium fluoride.
The estimate includes a high-grade component of 9.6 million tonnes grading 20.6 per cent calcium fluoride, which is expected to support future development studies.
The revised estimate follows the completion of approximately 23 km of drilling completed during 2025. The drilling program focused on infill, extension and metallurgical drilling and delivered results that increased both total resource tonnage and geological confidence across the deposit.
Tivan stated that the updated estimate has resulted in an increase in indicated resources, supporting the progression of technical and economic studies. The company is continuing work to advance the project toward feasibility.
“Speewah is now confirmed as a world-class fluorite resource, rare in the western hemisphere, in terms of size, grade, depth, mineralogy and proximity to port. Beyond the significant uplift in tonnage, we have achieved a step-change in data integrity, that will strongly support the definition of ore reserves later this year,” Tivan executive chairman Grant Wilson said.
A feasibility study for the Speewah project is scheduled for completion in February 2026, with additional drilling planned throughout the year to further support resource definition and development planning.
The project is located approximately 100 km south of Wyndham in Western Australia. The company is targeting the production of acid-grade fluorspar, defined as material containing more than 97 per cent calcium fluoride, for supply into international markets.
Tivan noted that the upgraded resource estimate represents an important milestone for the project as it continues to advance studies and development planning at Speewah.
Fluorite is used as a source of fluorine for chemicals like hydrofluoric acid, used in refrigerants, plastics, and uranium enrichment; as a flux in steel and aluminium smelting; and in specialty optics (lenses for telescopes, cameras) due to its clarity.
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