Latest Resource Estimation News

Stellar Resources has lifted its Heemskirk tin resource to 115.3kt of contained tin while technical studies move toward a prefeasibility study outcome. The company is better funded, but remains pre-revenue and faces the usual capital, permitting and execution hurdles of mine development.

Lunnon Metals has delivered thick, consistent gold intersections at the Plentiful prospect, where drilling now sits at approximately 20m by 20m spacing. The company is moving towards modelling and economic assessment, although a separate deep-drilling target failed to deliver enough encouragement for further work.

Caspin Resources has reported its strongest Bygoo tin intersection to date, while early test work points to 83.8% tin recovery into a high-grade concentrate. The gains come with familiar exploration-stage caveats: a $5.70 million annual loss, $5.03 million of operating cash outflow and continued reliance on equity funding.

Australian Rare Earths has converted Koppamurra from an exploration story into a defined rare earths development case, with an A$858 million after-tax PFS NPV and a maiden Ore Reserve. The next test is less geological than financial: the company must fund the path from pilot processing to construction while carrying a material going-concern warning.

Flynn Gold is pushing Golden Ridge and Firetower towards resource definition, but its FY2026 annual report flags a material going-concern uncertainty and a cash balance of just A$1.11 million. A partially underwritten A$3 million rights issue now sits alongside drilling, permitting and a non-binding processing pathway with Henty Gold Mine.

Stavely Minerals has outlined a potentially valuable 13-year copper-gold-silver project, but its latest annual report makes clear that funding remains the immediate constraint. The company ended June with A$3.1 million in cash and an auditor-flagged material uncertainty over its ability to continue as a going concern.

Prospect Resources has taken its flagship Mumbezhi Copper Project to 208.1 million tonnes, while lifting ownership to 90% and securing A$45 million for the next phase of work. The project remains pre-production, leaving the upcoming Scoping Study and further drilling to convert geological scale into an economic case.

Tambourah Metals has reported high-grade exploration results at Beatty Park South and Tambourah King, alongside a stronger cash position and a reduced annual loss. The projects remain at exploration stage, with drilling and resource modelling now carrying the story forward.

Peako has completed its 100% acquisition of six Saudi Arabian gold projects covering 862 square kilometres, clearing the way for maiden drilling from October. Recent fieldwork has identified extensive high-grade vein systems, but the reported grades remain exploration indicators rather than a mineral resource.

Maritana Minerals has extended gold mineralisation beneath the planned Pit 4 floor at Boorara, with drilling still open at depth. The results could feed a larger resource and revised pit design, although assays, estimation and optimisation work remain ahead of a targeted mid-2027 restart.

Unico Silver has secured approximately A$60 million from institutional and sophisticated investors, taking pro forma cash to about A$110 million. The capital will fund 20,000 metres of drilling, a maiden PFS due in January 2027 and continued advancement of a DFS through 2027.

Viking Mines has confirmed thick tungsten intervals both beneath and above historic workings at its Linka project in Nevada, including 18 metres at 0.42% WO3 and 13 metres at 0.46% WO3. The results strengthen the geological model, but reassays affecting parts of two holes leave an important qualification hanging over the latest batch.