Sandover Fluorite Assays Hit 91.4% CaF2, Mineralised Strike Extends 7km

Expanding the Sandover Fluorite Footprint

Tivan Limited has unveiled further ultra high-grade fluorite assay results from its Sandover Fluorite Project in the Northern Territory, reinforcing the project's promise as a world-class deposit. The recent surface sampling campaign, conducted in April and May 2025, returned rock chip samples with calcium fluoride (CaF2) grades as high as 91.4%, with a quarter of the samples exceeding 50% CaF2. This builds on an initial December 2024 program that yielded assays up to 94% CaF2.

These findings have extended the known mineralised strike length to approximately 7 kilometres, including the identification of previously undiscovered fluorite veins. The mineralisation occurs within a hydrothermal vein system hosted by the Lower Proterozoic Jinka Granite, a geological setting that has historically seen limited drilling activity, with the last campaign dating back to the early 1970s.

Strategic Minerals for Emerging Industries

Fluorite is increasingly recognised as a critical mineral, essential to the global semiconductor industry and the burgeoning energy transition sector, including lithium-ion battery production. Tivan’s discovery of high-grade barite, another critical mineral used primarily in oil and gas drilling fluids, further enhances the strategic value of the Sandover Project. Barite grades reached up to 45% BaO in the southern tenement area, presenting potential for a commercial product pending further testwork.

Advancing Towards Drilling and Development

With these encouraging assay results, Tivan is progressing approvals and clearances for its maiden drilling campaign, slated to commence in October 2025. The company is actively engaging with Traditional Owners, Native Title Holders, and the Central Land Council to secure cultural heritage and sacred site clearances. This drilling program will be the first at Sandover in over five decades and is supported by a $150,000 exploration grant from the Northern Territory Government, complementing capital raised earlier in the year.

Executive Chairman Grant Wilson highlighted the rapid progress, noting the company’s strong local standing and the potential for a significant step-change in project development. The drilling campaign aims to refine resource estimates and advance the project towards commercialisation, leveraging operational synergies with Tivan’s nearby Speewah Fluorite Project, which is under a joint venture with Sumitomo Corporation.

Looking Ahead

While the surface sampling results are promising, the true scale and economic viability of the Sandover deposit will hinge on forthcoming drilling outcomes and metallurgical studies. The low levels of deleterious elements such as arsenic and phosphorus, alongside manageable naturally occurring radioactive materials, bode well for processing. The company’s methodical approach to exploration and community engagement positions it well to unlock the full potential of this critical mineral asset.