Tivan’s Rock Chip Sampling Returns Up to 17.4% Cu and 38.1 g/t Au in Timor-Leste

High-Grade Mineralisation Confirmed at Baucau and Ossu Projects

Tivan Limited (ASX:TVN) has announced the discovery of high-grade copper, gold, and cobalt mineralisation across multiple sites at its Baucau and Ossu Projects in Timor-Leste. The results come from a reconnaissance surface sampling program conducted by Tivan’s geology team, with assays from 12 rock chip samples returning grades up to 17.4% copper (Cu), 38.1 grams per tonne (g/t) gold (Au), and 0.45% cobalt (Co). These findings confirm the prospectivity of the projects for high-grade copper-gold mineralisation and align closely with historic exploration data from previous concession holder Beacon Minerals Limited (ASX:BCN).

The Baucau and Ossu Projects are situated approximately 123 kilometres east of Dili, Timor-Leste’s capital, within a geologically complex region shaped by tectonic interactions between the Australian and Eurasian Plates. This setting is known to host some of the world’s most significant copper-gold deposits, including Grasberg in Indonesia and Ok Tedi in Papua New Guinea, although Timor-Leste itself remains underexplored.

Validation of Historic Data and Assay Highlights

Tivan’s recent sampling results broadly corroborate the historic datasets collected by Beacon Minerals, which had conducted various exploration activities including rock chip and stream sediment sampling, as well as ground magnetic geophysical surveys. Beacon’s previously unreported assays included gold grades up to 37.8 g/t, copper up to 14.59%, and cobalt up to 1.12%. Tivan’s assays from the Ossu Project returned up to 17.4% Cu and 38.1 g/t Au, while Baucau samples yielded up to 0.76% Cu and 9.3 g/t Au. The presence of cobalt mineralisation at levels up to 1.12% Co is notable given global cobalt grade benchmarks.

The integration of Tivan’s new data with the historic results has enhanced confidence in the geological model and supports the prioritisation of exploration targets. These combined datasets will underpin forthcoming programs including further geochemical sampling and planned geophysical surveys aimed at advancing the projects towards drill targeting.

Planned Exploration and Strategic Partnerships

Following the acquisition of the projects from Beacon Minerals in February 2026, Tivan is preparing for regional-scale on-ground exploration activities scheduled for the second quarter of 2026. These will include additional surface sampling, geological mapping, and geophysical surveys to refine target areas. The company is also engaging with geophysical specialists to interpret existing magnetic survey data and assess the need for further surveys.

In parallel, Tivan is progressing formal joint venture agreements with Murak Rai Timor EP, a state-owned mining company, as mandated by the Timor-Leste Mining Code (2021). A Non-Binding Term Sheet has been signed, and the parties are working towards a Binding Term Sheet to establish a special purpose joint venture company in Timor-Leste. This partnership aims to support sustainable economic and social development in the region.

Community engagement remains a key focus, with Tivan collaborating with the Autoridade Nacional dos Minerais Timor-Leste (ANM), local stakeholders, and the Instituto de Geociências de Timor-Leste (IGTL) to secure social licence and facilitate project advancement. These efforts follow protocols established during Tivan’s earlier work at the Turiscai Project in Timor-Leste, which was announced in March 2025.

Broader Exploration Context and Company Activity

Tivan’s announcement follows its recent initiation of drilling programs at other Australian projects, including the Molyhil Tungsten and Sandover Fluorite Projects, where the company secured key environmental and cultural heritage approvals to commence ground-disturbing activities. These parallel developments reflect Tivan’s broader strategy to advance multiple mineral exploration assets across different commodities and jurisdictions, balancing copper-gold prospects in Timor-Leste with critical minerals projects in Australia.

Investors and market participants will be watching closely as Tivan progresses its exploration drilling and joint venture negotiations, with the potential for further assay results and operational updates in the coming months. The company’s approach to integrating historic data with new sampling and geophysical analysis exemplifies a methodical pathway towards resource definition in a relatively underexplored region.