Carnaby Confirms Two New Discoveries Before Evolution Mining Takeover

Carnaby Resources delivered two new copper-gold discoveries in its final drilling results at the Greater Duchess project on 13 August 2026, confirming fresh mineralisation at two structurally distinct targets just weeks before Evolution Mining is expected to complete a binding A$213 million all-scrip acquisition of the company. The Miniboom zone at Mount Hope and the Trek 1 Footwall Lode at Trekelano emerged from a campaign that Managing Director Rob Watkins characterised as highly successful. The timing is significant: with the Scheme Implementation Deed already signed on 26 July 2026, the incremental discovery value flows directly into Evolution Mining’s incoming portfolio rather than being priced into Carnaby’s standalone equity. For investors on both sides of the transaction, the results raise immediate questions about what these discoveries add to the deal’s implied asset value and the project’s development trajectory under new ownership.

Two new discoveries close out Carnaby’s final drill campaign at Greater Duchess

The completed drilling campaign at Greater Duchess, located in the Duchess/Mount Isa district of remote northwest Queensland, produced results across two separate targets that expand the project’s known mineralisation footprint beyond previously defined ore zones. Carnaby formally released the final results via ASX announcement on 13 August 2026.

The two discoveries occupy distinct geological positions within the Greater Duchess project area:

• Miniboom (Mount Hope): A pit-peripheral target situated along the perimeter of the existing Mount Hope open pit, offering near-term development optionality within the current mine footprint
• Trek 1 Footwall Lode (Trekelano): A footwall lode discovery pointing to a structurally substantial mineralised system with bulk-tonnage characteristics

Two structurally different finds from a single campaign represent broader geological success than a single zone extension. Both discoveries are anticipated to contribute incremental value to the Greater Duchess resource base, according to company management.

Miniboom intercepts confirm high-grade copper-gold potential at Mount Hope’s pit edge

Miniboom sits along the perimeter of the Mount Hope open pit, a positioning that carries immediate practical significance. Pit-peripheral discoveries typically require less additional infrastructure to access than greenfield targets, reducing the capital threshold between discovery and potential extraction.

The drill intercepts from two holes at Miniboom reported high-grade copper-gold mineralisation across meaningful widths:

The 5.4% CuEq sub-interval over 5 metres in Hole 1 represents the standout figure from the Miniboom discovery, indicating pockets of high-grade mineralisation within the broader intercept zone.

The combination of grade and geometry at the edge of an existing open pit is the detail that matters most for development economics. Miniboom is not a remote greenfield target requiring years of permitting and infrastructure buildout; it sits within an operational footprint that could be incorporated into pit design revisions with comparatively lower capital requirements.

Trek 1 Footwall Lode at Trekelano points to bulk-tonnage scale

The Trek 1 discovery at Trekelano tells a different story from Miniboom: one defined by width rather than pinpoint grade. The standout intercept, 88.6 metres at 1.2% CuEq, is the kind of interval that signals a structurally substantial mineralised system rather than a narrow high-grade vein.

The second hole’s 3.2% CuEq over 15 metres adds a higher-grade component to what is fundamentally a scale play. Analyst and company commentary has characterised Trek 1 as having bulk-tonnage potential, a distinction that shapes how the discovery should be evaluated.

What bulk-tonnage potential means for Greater Duchess’s development case

High-grade narrow-vein deposits and bulk-tonnage lode systems support fundamentally different mining approaches. Narrow veins deliver concentrated value per tonne but constrain throughput. Bulk-tonnage lodes, where mineralisation extends over wide intervals at moderate grades, support high-volume processing operations with longer projected mine lives.

Copper deposit geology shapes both the development economics and the processing routes available to project owners; the distinction between bulk-tonnage lode systems like Trek 1 and higher-grade narrow-vein targets like Miniboom reflects the same fundamental geological diversity that determines whether assets suit large centralised mills or smaller selective mining operations.

For Greater Duchess under Evolution Mining’s ownership, Trek 1’s scale characteristics align with the kind of feed that large processing facilities are designed to handle. This is directly relevant to the Ernest Henry routing logic that underpins the acquisition’s strategic rationale.

What Greater Duchess actually holds: the resource and reserve base the discoveries are joining

The two new discoveries are additions to a project that already carries a substantial resource and reserve base. Greater Duchess is not an early-stage exploration asset; it is a development-ready project with advanced feasibility work behind it.

The project’s current development status provides important context for evaluating the deal:

• Pre-Feasibility Study (PFS) is well advanced
• Feasibility work is progressing toward development readiness
• Located in the Duchess/Mount Isa district of remote northwest Queensland, with access to established regional mining infrastructure

The 441,000 tonnes of contained copper equivalent across the total mineral resource establishes Greater Duchess as a project of meaningful scale. The Miniboom and Trek 1 discoveries represent potential additions to this base, pending future resource estimation work.

Copper price fundamentals in 2025 shaped the valuation environment in which the A$213 million Carnaby deal was negotiated, with spot and forward pricing directly influencing the revenue assumptions embedded in Greater Duchess’s pre-feasibility economics.

Evolution Mining’s A$213 million all-scrip deal and what it means for Greater Duchess

The binding Scheme Implementation Deed, dated 26 July 2026 and announced on 27 July 2026, sets out clear terms for Evolution Mining’s acquisition of 100% of Carnaby Resources through a court-approved scheme of arrangement. The transaction is structured entirely as scrip consideration: 0.0682 Evolution Mining shares for each Carnaby share held, implying a price of approximately A$0.77 per Carnaby share and an equity value of approximately A$213 million.

Completion requires satisfaction of several conditions:

ASIC Regulatory Guide 60 on schemes of arrangement sets out the procedural requirements governing court-approved transactions of this kind, including the shareholder approval thresholds, the court’s role in sanctioning the scheme, and ASIC’s own review process before a no-objection statement is issued.

• Carnaby shareholder approval
• Court approval
• Regulatory clearances including ACCC
• Target implementation: mid-November 2026

Carnaby’s existing tolling and offtake arrangements with Glencore will terminate upon scheme completion. Greater Duchess concentrate will subsequently be sold under Ernest Henry’s existing offtake structure, removing a layer of counterparty complexity from the project’s commercial pathway.

Managing Director Rob Watkins described the proposed acquisition as the superior risk-adjusted development pathway for the Greater Duchess project, according to the company’s ASX announcement.

Ernest Henry as the processing solution Carnaby could not build alone

The strategic logic centres on Evolution Mining’s Ernest Henry processing facility, which operates existing copper-gold processing capacity in the Mount Isa province and sits within geographic reach of Greater Duchess.

Building a standalone processing plant in remote northwest Queensland would require substantial capital expenditure and years of permitting. The Ernest Henry routing eliminates that requirement, giving Greater Duchess access to established processing infrastructure without the cost and timeline risk of a greenfield construction. This is the industrial rationale that makes the transaction more than a financial exercise.

Discovery results confirmed mid-scheme: implications for Carnaby and Evolution investors

The sequence matters. Carnaby signed the binding Scheme Implementation Deed on 26 July 2026. The final drilling results confirming two new discoveries were released on 13 August 2026, eighteen days later. The incremental geological value identified by the campaign was confirmed after the deal terms were already locked.

This pattern is consistent with how bolt-on acquisitions in the Australian copper sector often capture late-stage discovery upside. Exploration campaigns do not pause for M&A timelines, and results frequently land during scheme implementation periods.

The implications differ depending on which side of the transaction an investor holds:

• Carnaby shareholders: Retain indirect exposure to Greater Duchess discovery upside through the Evolution Mining scrip they receive upon scheme completion. The new discoveries may enhance the long-term value of that scrip, though they are not separately priced into the scheme consideration.
• Evolution Mining shareholders: Gain exposure to a project entering the acquisition with its strongest geological case yet, including two new discoveries that could contribute to future resource growth and mine planning flexibility.

The deal reflects a broader consolidation pattern in the Australian copper sector, where major producers are acquiring development-ready assets in established mining provinces as energy-transition demand continues to support copper’s long-term fundamentals.

The Carnaby-Evolution transaction fits within broader mining M&A consolidation trends that have seen major ASX producers systematically target development-ready assets in proven Australian provinces, using scrip-based structures to absorb copper projects without significant cash outlay.

Greater Duchess heads toward Evolution Mining with its strongest geological case yet

Carnaby Resources’ completed drill campaign delivered exactly what a final-stage exploration program needs to: two new discoveries across distinct geological settings, both carrying near-term development relevance. Miniboom’s high-grade pit-peripheral intercepts and Trek 1’s bulk-tonnage footwall lode expand the project’s optionality at the point where it matters most, immediately ahead of a change in ownership.

The next material milestone for investors in both companies is the targeted scheme implementation in mid-November 2026, subject to shareholder, court, and regulatory approvals. The Carnaby-Evolution transaction adds to a visible pattern of major ASX-listed producers acquiring development-ready copper assets in the Mount Isa province, positioning for sustained copper demand driven by global energy-transition requirements.

The structural copper supply deficit underpinning demand for projects like Greater Duchess is not a short-term imbalance; analysts project that even a full pipeline of development-stage assets globally will fall well short of covering the metal required for electrification infrastructure through the 2030s.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions.