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    Antipa’s gold–copper pathway at Minyari: flowsheet and PFS cues for mine engineers

    September 22, 2026|

    Reviewed by Tom Sullivan

    Antipa’s gold–copper pathway at Minyari: flowsheet and PFS cues for mine engineers

    First reported on Australian Mining

    30 Second Briefing

    Antipa Minerals has selected a dual-product processing route for the Minyari Dome project in Western Australia, targeting on-site production of gold doré and a saleable copper concentrate, and has pushed release of its pre-feasibility study to November 2026. The company reports that its main PFS technical workstreams are complete and a preferred development configuration has been chosen, implying a defined flowsheet and plant layout. The gold–copper pathway signals a shift from a pure gold concept to a polymetallic operation, with implications for flotation circuit design, tailings management and offtake strategy.

    Technical Brief

    • Dual-product route implies combined gravity/CIP for doré plus sulphide flotation for copper recovery.
    • Flotation selection will drive grind size, reagent scheme and residence time, affecting power demand.
    • Copper concentrate production introduces need for separate thickening, filtration and concentrate storage infrastructure.
    • Mixed gold–copper circuit will require careful deportment modelling to manage gold reporting to concentrate vs doré.
    • Tailings stream chemistry changes with sulphide flotation, likely increasing focus on ARD and cyanide management.
    • Plant layout will need segregated gold and copper handling areas to minimise cross-contamination and security issues.

    Our Take

    The decision to target a gold–copper development pathway at Minyari Dome aligns with earlier metallurgical work (July 2026 item) showing the ore suits a conventional flowsheet, which should help Antipa Minerals control capex and commissioning risk compared with more complex processing routes common in Western Australia’s polymetallic plays.

    Recent drilling at Tim’s Dome, also in Western Australia’s Paterson Province, has extended gold–copper mineralisation over multi‑kilometre strike, suggesting Antipa Minerals could ultimately look at a hub‑and‑spoke development concept with Minyari Dome as the core processing centre if resources prove contiguous and truckable.

    Within our 1276 Mining stories and 602 keyword‑matched gold/copper pieces, relatively few junior Western Australian operators like Antipa Minerals are signalling PFS timelines as far out as November 2026, which likely reflects a deliberate choice to keep de‑risking resource scale and metallurgy before locking in a development case in a volatile price and cost environment.

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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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