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    Regis Resources 120% ore reserve lift: pit design and planning notes for engineers

    April 22, 2026|

    Reviewed by Tom Sullivan

    Regis Resources 120% ore reserve lift: pit design and planning notes for engineers

    First reported on Australian Mining

    30 Second Briefing

    Regis Resources has reported a 120 per cent increase in ore reserves, driving plans to expand production across its Western Australian gold operations. The company is focusing on brownfields growth at its Duketon and Tropicana assets, where existing processing plants and haulage infrastructure can be leveraged to lift mill throughput and extend mine life. For mine planners and geotechs, the larger reserve base supports longer pit pushbacks, revised strip ratios and potential re-optimisation of pit shells under higher-confidence resource models.

    Technical Brief

    • Brownfields focus allows utilisation of existing pits, waste dumps and TSFs, minimising new disturbance footprints.
    • Existing haul roads and crusher-feed arrangements can be sweated harder before committing to major capital expansions.
    • Longer mine life at established sites supports incremental tailings storage lifts rather than greenfield TSF construction.
    • Contracting strategies may shift towards longer-term drill-and-blast and load–haul agreements, backed by extended reserve cover.
    • For similar Western Australian goldfields operations, comparable reserve step-changes typically trigger updated closure plans and rehabilitation sequencing.

    Our Take

    The 120 per cent ore reserves increase for Regis Resources in Australia sits alongside recent coverage of its Tropicana mineral resource upgrade, suggesting a coordinated reserve‑growth phase rather than a one‑off adjustment.

    Our database shows multiple 2026 items linking Regis Resources with extended underground services contracts at Duketon, indicating that the ore reserve uplift is likely to translate into sustained demand for contractors such as Perenti/Barminco in the Western Australian Goldfields.

    With Regis Resources’ liquidity recently reported at around A$1 billion, the scale of the ore reserve surge in Australia gives the company unusual flexibility among gold operators in our Mining corpus to fund mine life extensions and brownfield expansions from its own balance sheet.

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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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