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    Carnaby’s Greater Duchess copper hits: Evolution deal lens for mine planners

    August 13, 2026|

    Reviewed by Joe Ashwell

    Carnaby’s Greater Duchess copper hits: Evolution deal lens for mine planners

    First reported on Australian Mining

    30 Second Briefing

    Carnaby Resources’ final assays from its Greater Duchess copper–gold project near Mount Isa, Queensland, returned copper equivalent grades up to 5.4 per cent from two new discoveries just as Evolution Mining moves to acquire the company. The completed drilling programme at Greater Duchess confirms multiple high-grade zones across the new targets, adding to the existing resource footprint and strengthening the geological case for a district-scale system. For mine planners and geotechs, the results sharpen the development rationale Evolution must now evaluate in its acquisition due diligence.

    Technical Brief

    • Drilling campaign at Greater Duchess has concluded, with all final assays now compiled and reported.
    • Two discrete mineralised discoveries were defined within the Greater Duchess tenure during this latest programme.
    • Programme design focused on copper–gold targets near Mount Isa, indicating compatibility with existing regional processing hubs.
    • Timing of the completed drilling aligns with Evolution Mining’s due diligence and acquisition assessment of Carnaby.
    • Data from the programme will now feed into updated resource models and mine planning scenarios.
    • Evolution’s review will need to integrate geotechnical, hydrogeological and metallurgical assumptions derived from the new drilling.
    • For comparable Mount Isa–style systems, such clustered discoveries often support shared haulage, power and water infrastructure.

    Our Take

    The all‑share A$213 million acquisition of Carnaby Resources by Evolution Mining flagged in our related coverage suggests these 5.4% copper‑equivalent hits at Greater Duchess could materially upgrade the value of Evolution’s copper‑gold growth pipeline in Queensland once the deal closes.

    With Greater Duchess sitting about 70 km south of Ernest Henry, Evolution’s existing underground contracting work at the nearby Bert project (via Redpath, per our database) indicates it already has regional execution capacity that could be leveraged for any future development push at Mount Isa–scale copper assets.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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