Araxá’s resource surge brings St George closer to a mine decision

Araxá resource reaches 111.2Mt

St George Mining Limited (ASX:SGQ) has entered the next phase of its Araxá story with a resource large enough to make the development question unavoidable. A post-year-end update lifted the project’s total Mineral Resource Estimate to 111.2 million tonnes at 3.57% total rare earth oxides and 0.57% niobium oxide, including an estimated 760,000 tonnes of NdPr oxides and 630,000 tonnes of Nb2O5.

The higher-confidence portion is the more important figure for project studies: Measured and Indicated resources rose 155% to 75.2Mt at 3.64% TREO and 0.58% Nb2O5. St George says this gives Araxá more contained NdPr in the Measured and Indicated category than Lynas’ Mt Weld and MP Materials’ Mountain Pass, although those comparisons do not turn a Mineral Resource into an economic mine. The company has reported no ore reserve or detailed mine design.

From drilling success to mine studies

More than 18,000 metres of drilling during the year underpinned the March resource upgrade and subsequent growth. The deposit remains open in all directions, while the company says mineralisation starts at surface and that the upper 120 metres sits within a weathered, free-digging profile potentially amenable to open-pit mining. East Araxá, about one kilometre from the main deposit, is being drilled separately and is not included in the 111.2Mt estimate.

Worley has been appointed as technical adviser across mine planning, process design, feasibility work, tailings, procurement and construction. Metallurgical work has also produced niobium concentrates grading up to 40.2% Nb2O5 in open-circuit flotation tests, alongside a rare earth concentrate stream grading 15.7% TREO. Those are test-work results, not operating performance, and locked-cycle, pilot-scale and downstream studies remain part of the development path.

Permitting begins as capital demands rise

St George lodged an Environmental Impact Assessment and Environmental Impact Report with Minas Gerais regulators in August, beginning the first stage of the state’s three-part licensing process. The company’s expectation is that the Preliminary and Installation Licence stages could be completed within 12 months, but the filing also identifies regulatory approvals, environmental conditions and foreign-operation exposure as material risks.

The balance sheet is better funded than it was a year earlier, but the cash is being consumed by an ambitious development programme. St George raised A$132 million through placements during the financial year, while year-end cash and term deposits totalled A$80.7 million. Operating cash outflow was A$19.5 million and investing outflow was A$97.4 million, including acquisition, exploration and term-deposit payments. The company reported a statutory loss of A$44.6 million, driven in part by A$23.0 million of share-based payment expense and A$16.5 million of exploration expenditure.

The development test is still ahead

For shareholders, Araxá now offers scale, a dual rare earths-niobium proposition and a growing set of Brazilian processing and downstream relationships. It also presents the harder questions: whether beneficiation and refining can deliver commercially credible recoveries and products, whether permitting proceeds as expected, and what capital will be required to move from feasibility into construction.

The annual report is therefore less a production milestone than a progress report on a heavily funded development bet. The next meaningful markers are the Worley-led economic studies, East Araxá’s potential maiden resource, pilot-plant results and, ultimately, the conversion of part of the resource into an ore reserve capable of supporting a mine decision.