Sibanye-Stillwater Approves Mt Lyell Copper Restart and Burnstone Gold Project

What happened

On September 1, Sibanye Stillwater reported that its Board had given positive investment decisions to the Burnstone gold project in South Africa and the Mt Lyell copper and gold restart in Tasmania. Burnstone followed a restated feasibility study and internal assurance review. An initial R98 million budget has been approved for 2026 and project setup has commenced.

Burnstone contains 2.7 million ounces of gold Mineral Reserves and 8.9 million ounces of Mineral Resources as reported at December 31, 2025. The company expects approximately 130,000 ounces of annual steady state gold production. It reports a net present value of approximately R19.2 billion, an internal rate of return of 36.1%, project infrastructure capital of approximately R3.5 billion over six years and preproduction capital of approximately R2.5 billion through 2028. Plant operation is expected to begin in 2029.

Mt Lyell is planned as a 23 year restart with project execution beginning during the first half of 2027 and first metal targeted for early 2029. The company expects annual steady state production of approximately 26,000 tonnes of copper, 16,000 ounces of gold and 116,000 ounces of silver. It reports a post tax net present value of approximately US$550 million, an internal rate of return near 20% and total project capital of approximately US$340 million. That capital figure excludes US$74 million for shaft refurbishment. The investment decision remains subject to the conclusion or waiver of an agreement with the previous owner.

Signal reading

The decisions show how stronger cash generation can reopen organic projects already held inside a diversified portfolio. Existing infrastructure reduces part of the capital and execution burden at both assets, while the Board approvals give management a defined basis for project spending. The stages remain different. Burnstone has entered project setup, while Mt Lyell retains a contractual condition and is not scheduled to begin project execution until 2027.

Next proof point: continued Burnstone setup and preproduction work, conclusion or waiver of the Mt Lyell agreement with the previous owner, expenditure against approved budgets, commencement of Mt Lyell execution in 2027 and evidence that both projects remain within cost and schedule toward first production in 2029.

What happened

ACG Metals announced on September 1 that Gediktepe produced its first copper concentrate on August 31. The company said commissioning is progressing as planned and that the operation has entered the ramp up phase.

Management is now focused on increasing throughput, improving plant performance, raising recoveries and delivering consistent concentrate quality. ACG continues to target full production by the end of 2026. The company stated that the first concentrate was achieved safely and within budget.

First concentrate is a physical operating milestone, but the announcement did not provide concentrate tonnage, grade, recovery, shipment or sales data. Those measures will determine whether Gediktepe can move from commissioning output into sustained commercial production.

Signal reading

Gediktepe has crossed from construction and commissioning into the production of a marketable intermediate product. That threshold matters because it begins to replace schedule assumptions with operating evidence. Ramp up can still expose constraints in ore blending, throughput, recovery, concentrate quality and plant availability, so the first batch should be read as the beginning of the operating test.

Next proof point: sustained plant throughput, repeatable recovery and concentrate quality, first shipment or sale, production guidance and evidence that the operation reaches stable output by the end of 2026.

What happened

Astron announced that the Australian Commonwealth Government had approved the export of rare earth element concentrate from the Donald Rare Earth and Mineral Sands Project in Victoria to the United States. The concentrate is classified as a controlled ore under the Customs (Prohibited Exports) Regulations 1958, and the permit must be renewed every two years.

Energy Fuels has the right to purchase 100% of Donald’s rare earth concentrate and plans to process it into rare earth oxides at the White Mesa Mill in Utah. Astron reports that the concentrate contains terbium oxide equal to 0.4% and dysprosium oxide equal to 2.7% of total rare earth oxides. Astron also states that dysprosium and terbium oxides produced at White Mesa have been approved for commercial permanent magnet production.

The licence resolves a material export control requirement, but Donald has not reached a final investment decision. Astron and Energy Fuels continue to work on Phase 1 project financing, with a final investment decision targeted during the third quarter of 2026.

Signal reading

The approval creates a legal route connecting an Australian heavy rare earth source with United States processing capacity. It also shows that allied mineral chains depend on trade permissions as well as geology, finance and plant capability. The need for renewal every two years makes regulatory continuity part of the future operating system.

Next proof point: completion of Phase 1 financing, a positive final investment decision, construction, renewal of the export permit when required, first concentrate exports and demonstrated processing into qualified rare earth oxides at White Mesa.

What happened

Liontown signed a binding farm in agreement with NEXT Lithium that creates a staged pathway to acquire up to 100% of the company holding the Centenario lithium brine exploration project in Salta Province. Initial completion remains subject to customary conditions, including the release of security interests over the project vehicle and tenements and repayment of specified intercompany loans.

Once those conditions are satisfied or waived, Liontown will pay US$5 million in cash and issue US$10 million in Liontown shares for the farm in rights. The structure contemplates US$40 million of project expenditure over four years and associated resource linked milestone payments of up to US$140 million.

An initial US$15 million work program is planned over 12 to 24 months, including drilling of targets identified through a transient electromagnetic survey. Liontown may earn an effective 49% interest after funding US$15 million within 24 months. It is not obliged to advance through each later phase, although reaching a 75% interest would trigger a required acquisition of the remaining 25% for consideration capped at US$125 million. The conditions for initial completion must be met or waived within six months unless the parties agree otherwise.

Signal reading

Liontown is entering a major lithium jurisdiction through capital that increases as geological evidence develops. The structure limits early exposure while giving the company a route from its hard rock operating base in Western Australia into brine exploration in Argentina. The partnership also has a skills dimension because Liontown explicitly identifies NEXT Lithium’s Argentine brine experience as part of the capability it wants to build.

Next proof point: satisfaction or waiver of the initial conditions, payment of the first consideration, commencement of drilling, results capable of supporting a mineral resource and completion of the US$15 million expenditure required to earn the first 49% interest.

What happened

DLP Resources published a preliminary economic assessment for its 100% owned Aurora copper, molybdenum and silver project, located approximately 60 kilometres northeast of Cusco. The base case estimates a post tax net present value of US$2.703 billion at an 8% discount rate, an internal rate of return of 18.5% and a payback period of 5.2 years using the company’s long term commodity price assumptions.

The concept has a 17.5 year mine life and a processing rate of 65,000 tonnes per day. Average annual payable production is estimated at 90.5 million pounds of copper, 37.4 million pounds of molybdenum and 1.21 million ounces of silver. Initial capital is estimated at US$2.377 billion, with approximately US$1.160 billion of sustaining and underground development capital and US$121 million of closure costs.

The updated estimate contains 614.84 million tonnes of Indicated Mineral Resources and 1,118.80 million tonnes of Inferred Mineral Resources. The proposed plant would produce concentrates grading approximately 25% copper and 55% molybdenum, with filtered tailings placed in a dry stack facility. The assessment is preliminary, includes Inferred Mineral Resources and does not establish Mineral Reserves or certainty that the projected economics will be achieved.

Signal reading

Aurora has moved from resource scale into a phased development concept with defined production, processing and capital assumptions. The study makes the opportunity more legible, while also revealing the size of the financing and institutional task ahead. A project requiring more than US$2.3 billion of initial capital must convert resources, engineering, environmental readiness, community engagement and strategic partnerships into a bankable plan.

Next proof point: filing of the National Instrument 43 101 technical report, initiation of prefeasibility work, infill and geotechnical drilling, further metallurgy, environmental baseline progress, resource conversion and evidence of a credible strategic and financing pathway.

What happened

Radisson Mining closed its previously announced private placement with Agnico Eagle Mines. Agnico Eagle purchased 53.42 million units at C$1.07 per unit for gross proceeds of C$57.159 million. Each unit contains one common share and one half warrant exercisable at C$1.39 for 60 months.

Following the closing, Agnico Eagle holds approximately 10.45% of Radisson’s outstanding shares on a basic basis and approximately 14.90% on a partially diluted basis. The parties also executed the investor rights agreement announced on August 24.

Radisson intends to use the proceeds to begin an advanced underground exploration program at the O’Brien Gold Project in Quebec, including an access ramp and related underground and surface infrastructure. Its ongoing 140,000 metre step out drilling program remains funded from existing cash. The placement has closed but remains subject to final acceptance by the TSX Venture Exchange.

Signal reading

Closing changes the financing from an announced transaction into cash and ownership. Agnico Eagle’s position also creates a strategic relationship around an Abitibi gold asset and gives Radisson a stronger basis for underground access and project definition. The proceeds do not authorise the ramp or establish a mine development decision, and engineering, permits and technical evidence still govern the next stage.

Next proof point: final exchange acceptance, completion of ramp engineering and permitting, construction mobilisation, underground drilling results, updated resources and a later decision on the development path for O’Brien.