Queensland’s copper-gold region is becoming the focus of Evolution Mining’s latest expansion push.
By Charles Pitts
Evolution Mining’s proposed A$213 million acquisition of Carnaby Resources is moving toward a shareholder vote scheduled for October 28, as the Australian gold and copper producer seeks to add a large development-stage asset near its Ernest Henry operations in Queensland.
Carnaby’s board has unanimously recommended the all-scrip transaction, subject to an independent expert finding that the deal is in shareholders’ best interests and no superior proposal emerging. The transaction would give Evolution control of Carnaby’s Greater Duchess copper-gold project and its surrounding exploration tenure in the Cloncurry district.
The proposed takeover comes as mining companies seek to secure additional copper supply in established operating regions. Copper demand is being supported by grid investment, electrification, data-centre construction and energy-transition infrastructure, while new projects continue to face long permitting timelines and rising development costs.
For Evolution, the Greater Duchess project offers the possibility of adding approximately 10,000 tonnes per year of copper production at Ernest Henry by using existing infrastructure and latent processing capacity. The opportunity remains subject to further feasibility work, approvals and a final investment decision.
Deal terms and shareholder support
Under the proposed scheme of arrangement, Carnaby shareholders would receive 0.0682 new Evolution shares for every Carnaby share held. The offer implies approximately A$0.77 per Carnaby share and values the company at about A$213 million.
The consideration represented a 60.4% premium to Carnaby’s closing price of A$0.48 on July 24, according to Evolution’s market announcement. It also represented a 31.4% premium to Carnaby’s 30-day volume-weighted average price of A$0.59.
| Transaction metric | Disclosed position |
|---|---|
| Implied equity value | Approximately A$213 million |
| Consideration | 0.0682 Evolution shares per Carnaby share |
| Implied Carnaby offer price | Approximately A$0.77 per share |
| Premium to July 24 closing price | 60.4% |
| Premium to 30-day VWAP | 31.4% |
| Carnaby shareholder ownership of Evolution after completion | Approximately 0.9% |
| Potential additional copper production | Approximately 10,000 tonnes per year |
Carnaby directors, who collectively hold or control about 7.3% of the company, have indicated that they intend to vote in favour of the scheme, subject to the same conditions as the board recommendation.
The deal is also conditional on regulatory clearances, including Australian Competition and Consumer Commission approval, and Federal Court approval. Implementation is targeted for mid-November if the required conditions are met.
As reported by Skillings, the shareholder meeting is the next major milestone in a transaction that would deepen Evolution’s position in the North West Queensland copper-gold corridor.
Greater Duchess adds scale near Ernest Henry
Greater Duchess is located roughly 70 kilometres southeast of Mount Isa and covers a large package of copper-gold exploration and development tenure. Carnaby’s project includes the Mount Hope, Nil Desperandum, Lady Fanny and Trekelano deposits, along with numerous exploration targets across the broader landholding.
Carnaby reports a Greater Duchess mineral resource of 29.2 million tonnes grading 1.3% copper and 0.2 grams per tonne of gold. The project also has an ore reserve of 8.4 million tonnes grading 1.7% copper and 0.3 grams per tonne of gold.
The resource includes approximately 380,000 tonnes of contained copper and 230,000 ounces of contained gold, according to Carnaby’s project information. The company has been advancing the asset through a pre-feasibility study and has described it as a potential staged development.
Exploration and drilling remain central to the Greater Duchess development pathway.
The project’s location is central to Evolution’s rationale. Rather than developing Greater Duchess as an isolated operation, Evolution plans to assess how the deposits could be integrated into Ernest Henry’s existing mine plan, concentrator and regional infrastructure.
Evolution said the acquisition would provide an additional source of ore for Ernest Henry and support better utilisation of available mill capacity. The company also expects to examine potential mining, processing and operating efficiencies across the combined assets.
Evolution Chief Executive Lawrie Conway described the transaction as an opportunity to consolidate the company’s position in the Cloncurry region and expand the copper growth pipeline around Ernest Henry.
Feasibility work remains before production
Greater Duchess is not yet a producing mine. Evolution intends to complete an updated feasibility study after the transaction, building on work undertaken by Carnaby.
The study is expected to take between 12 and 18 months. It will assess the geological model, resource and reserve estimates, mine design, production sequencing, metallurgy, capital requirements and operating costs.
It will also consider how Greater Duchess could be incorporated into the broader Ernest Henry life-of-mine plan. Further infill, step-out and regional exploration drilling could be used to improve confidence in the mineral inventory and potentially expand the development case.
The company has not committed to a final investment decision or a construction timetable. Approvals and permits also remain outstanding, meaning the proposed 10,000-tonne annual copper contribution is a development target rather than near-term production guidance.
That distinction is important for investors and regional contractors. The acquisition secures access to a large copper-gold system in an established mining province, but the timing and economics of any future production will depend on the updated study and subsequent approvals.
Glencore agreements to be restructured
The transaction also changes the commercial arrangements surrounding Greater Duchess.
Carnaby’s existing tolling and offtake agreements with Glencore are expected to be terminated as part of the acquisition. Evolution and Glencore have separately agreed that concentrate produced from Greater Duchess ore would be sold to Glencore under Evolution’s existing Ernest Henry offtake arrangements.
The companies have also agreed to terms covering the toll treatment of third-party ore through the Ernest Henry processing facility.
Existing processing infrastructure is a key part of Evolution’s integration strategy.
The restructuring could allow the combined operation to be managed through Evolution’s established operating and marketing platform. It may also reduce the need for Greater Duchess to rely on a standalone processing solution.
However, the commercial benefits will depend on the characteristics and volume of ore available, the final mine schedule and the capacity available at Ernest Henry after accounting for existing operations and the Bert expansion project.
Regional consolidation gains momentum
Evolution produced 66,000 tonnes of copper in fiscal 2026, alongside 715,000 ounces of gold, according to its acquisition announcement. Ernest Henry contributed A$547 million in operating mine cash flow during the year.
The Carnaby purchase is relatively small compared with Evolution’s overall business, but it is strategically concentrated. It adds a copper-rich development option close to an existing mine, processing plant, infrastructure network and experienced workforce.
The acquisition also expands Evolution’s exploration footprint in a district with a long history of copper and gold production. Carnaby’s project page notes that the historical Duchess mine produced approximately 205,000 tonnes at 12.5% copper between 1900 and 1940.
The broader significance is the continued consolidation of established mining regions. Producers are increasingly examining projects that can be connected to existing infrastructure rather than building entirely new processing and logistics systems. Such deals can reduce some development barriers, although they do not eliminate geological, permitting, metallurgical or execution risks.
For Carnaby shareholders, the scheme provides an immediate premium and continued exposure to Greater Duchess through Evolution shares. For Evolution, it offers a pathway to more copper production and exploration optionality around Ernest Henry without acquiring a large standalone producer.
The October 28 vote will determine whether the transaction can advance to its next stage. If approved, attention will shift to the updated feasibility study, the integration plan and whether Greater Duchess can become a permitted, economically viable source of copper-gold feed for Ernest Henry.
Market context
The offer was struck against a stronger copper market backdrop, with Evolution citing Carnaby’s A$0.59 30-day VWAP and A$0.48 closing price as reference points for the premium. The 60.4% premium to the last close underscores the value Evolution placed on securing the project and its surrounding tenure.
The transaction does not guarantee future production or establish a fixed valuation for the development asset. Its outcome will depend on copper and gold prices, capital and operating costs, permitting, metallurgy and the ability to integrate Greater Duchess into Ernest Henry’s operating schedule.
Sources: Evolution Mining’s ASX announcement, Evolution Mining, Carnaby Resources’ Greater Duchess project information, and Skillings.
Shareable snippet: Evolution Mining’s A$213 million Carnaby Resources takeover is heading toward an October 28 shareholder vote. The deal would add the Greater Duchess copper-gold project near Ernest Henry and could support about 10,000 tonnes a year of additional copper production, subject to feasibility work and approvals.
