Key Highlights

  • Solstice drilling at Nanadie extended mineralisation beyond its existing resource boundary.
  • Sandfire reported Q1 FY27 copper equivalent output of 38.9kt across its two operations.
  • Carnaby shareholders approved a scheme of arrangement with Evolution Mining.
  • The Carnaby scheme remained subject to a court hearing scheduled for 29 October 2026.

Solstice Minerals Limited (ASX:SLS), Sandfire Resources Limited (ASX:SFR) and Carnaby Resources Limited (ASX:CNB) released updates on 27 October 2026. The reports cover drilling at a Western Australian copper-gold project, production and cost performance at two Sandfire operations and the progress of a Takeover scheme for Carnaby.

Latest Developments

Solstice reported that multi-rig drilling at its 100 per cent owned Nanadie Copper-Gold Project continued to extend mineralisation beyond the current 40.4 million tonne resource estimate. A combined reverse circulation and diamond intercept of 722.3 metres at 0.44 per cent copper and 0.13g/t gold was reported in one hole, including low-grade and unmineralised intervals. The company said the system extends over at least 1.5 kilometres of strike, remains open, and held $41.3 million in cash with no Debt at quarter end.

Sandfire reported copper equivalent production of 38.9kt in the first quarter of FY27, representing about a quarter of the mid-point of annual guidance, and said it retained its FY27 guidance. The MATSA operation produced 22.7kt and recorded an underlying unit cost of $95 per tonne, while Motheo produced 16.1kt at a unit cost of $48 per tonne. Sandfire also invested $12 million in regional exploration and $4 million in near-mine work, and remains on track to complete its Kalkaroo pre-feasibility study in the second half of FY28.

Carnaby Resources said its shareholders approved the proposed scheme of arrangement with Evolution Mining at a meeting on 26 October 2026. Under the scheme, Carnaby shareholders are to receive 0.0682 new Evolution shares for each Carnaby share. The scheme remains subject to court approval at a second hearing scheduled for 29 October 2026, and to other conditions outlined in the scheme booklet. Carnaby reported $7.8 million in cash at 30 September 2026.

Sector Context

Copper producers and developers are reporting results against the backdrop of fuel costs, currency movements and treatment charges, which can influence operating margins. Developers such as Solstice are focused on resource growth, while producers such as Sandfire report on output against annual guidance. Carnaby's scheme shows how consolidation can also shape the copper sector.

The three copper updates also reflect different stages of corporate and operational life. Solstice is in the resource-growth phase, where drilling results shape how large a deposit could become. Sandfire is focused on consistency across two operating mines, with cost and production guidance as the main reference points. Carnaby's situation is shaped by a takeover arrangement, meaning its shareholders' outcome depends on the scheme terms and the court process rather than on the operating results alone.

Risks to Consider

Drilling intercepts at Nanadie remain preliminary and do not yet confirm the size or Economics of the deposit. Sandfire's unit costs are exposed to fuel prices, exchange rates and maintenance cycles, and the company has flagged elevated fuel prices as a risk for the rest of the year. The Carnaby scheme is subject to court approval and other conditions, and may not complete as planned.

What to Watch Next

Readers may follow Solstice's further Nanadie assays and resource updates, Sandfire's pre-feasibility progress at Kalkaroo and cost trends at MATSA, and the outcome of the Carnaby court hearing and scheme implementation.

Final Word

The three updates show copper activity across exploration, production and corporate restructuring. Future company releases will show whether drilling results lead to larger resource estimates, whether cost trends continue and whether the Carnaby scheme proceeds, and readers can monitor those filings for further detail.