Latest Mineral Resource Estimates News

Brazilian Rare Earths has identified a new high-grade rare earth system at Sulista South, with mineralisation traced across about 500 metres and grades reaching 13.3% TREO. Step-out and infill drilling at Sulista East has also extended the known footprint and strengthened the case for a larger year-end resource estimate.

Barton Gold has moved deeper into development after raising $40.9 million, completing its largest-ever drilling campaign and ending FY2026 with $31.9 million in cash. The progress came alongside a $22.4 million loss as spending accelerated across Tunkillia, Challenger, Tolmer and Wudinna.

Resolution Minerals has turned Horse Heaven into the centre of its strategy, pairing broad gold drilling with high-grade antimony and tungsten test work. The expansion came with a sharply higher A$53.3 million FY2026 loss and a disclosed dependence on future funding.

Osmond Resources has outlined a 60.0 million tonne maiden JORC resource at its Orión critical minerals project in Spain, but most of the inventory remains Inferred and unproven economically. The company will resume drilling in October, with an updated estimate targeted for the first quarter of 2027.

Tarrina Resources has identified five kilometre-scale IOCG target zones at Walparuta after soil sampling returned copper values up to 2,891 ppm and gold up to 466 ppb. The planned 23-hole drill campaign remains subject to native title, heritage, land access and government approvals.

New Murchison Gold has reported high-grade drilling across three Lydia deposits near its Crown Prince operation, led by a 1m interval at 47.20g/t gold. The results define shallow mineralised zones, but remain outside the current Lydia resource and still require further drilling and modelling.

PolarX Limited (ASX:PXX) has reported a year of high-grade exploration results across Alaska and Nevada, led by a 24.8-metre copper intercept grading 9.8% at Caribou Dome. The company ended FY2026 with A$10.0 million in cash, but remains loss-making and dependent on future funding and exploration success.

Norwest Minerals has strengthened the technical case for its Bulgera heap-leach project with a revised 191,000-ounce resource and 86% bottle-roll recoveries. But the ASX-listed explorer ended FY2026 with $394,541 in cash, and its auditor highlighted material uncertainty over its ability to continue as a going concern.

Latitude 66 returned to a A$1.71 million FY2026 profit as asset sales funded a larger gold resource base and major KSB milestones. But the auditor flagged material uncertainty over the explorer’s ability to continue without further funding.

Iltani Resources has paired a substantial Orient silver-indium resource with $8 million in QIC backing, giving the explorer a stronger platform for its next phase of drilling and technical studies. The company remains loss-making and pre-revenue, but ended FY26 with $7.5 million in cash.

St George Mining’s Araxá project now boasts a 111.2Mt rare earths resource after a major post-year-end upgrade, alongside 630,000 tonnes of contained niobium. The 2026 annual report shows a company moving rapidly towards development, but still without an ore reserve, mine design or production decision.

Eminence Minerals has cut its FY2026 loss and raised its pro forma cash position to about A$5.4 million after selling the Mata da Corda titanium project. The portfolio is now centred on Hamersley iron ore and Brazilian rare earth exploration, but heritage litigation, ungranted tenure and future funding needs remain material constraints.