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    Saturn’s Apollo Hill 2.83Moz gold resource: design and pit slope notes for planners

    June 4, 2026|

    Reviewed by Joe Ashwell

    Saturn’s Apollo Hill 2.83Moz gold resource: design and pit slope notes for planners

    First reported on Australian Mining

    30 Second Briefing

    Saturn Metals has increased the Apollo Hill gold project mineral resource in Western Australia by 590,000 ounces to 2.83 million ounces, now reported as 174 million tonnes at 0.51g/t Au. The estimate is reported above a 0.15g/t cut-off, indicating a large, low-grade open-pit style inventory typical of bulk-tonnage WA gold systems. For mine planners and geotechs, the scale and grade profile point to high-volume, low-grade processing strategies and extensive pit slope optimisation work in weathered Archean host rocks.

    Technical Brief

    • Resource growth concentrated at Apollo Hill, allowing larger staged open-pit shells in future optimisation.
    • Scale now supports long-life haul road, waste dump and TSF corridor planning across the lease.
    • Larger inventory increases optionality for multiple satellite pits feeding a central processing facility.
    • Geotechnical database will need expansion for slope design across a materially larger pit footprint.
    • Hydrological and dewatering studies must be re-scoped to reflect extended pit depth and lateral extent.
    • Mine scheduling can now evaluate higher strip-ratio starter pits transitioning to bulk-tonnage phases.
    • For similar mining projects, such step-changes often trigger re-cut of cut-off and staging strategy.

    Our Take

    Earlier coverage of Saturn Metals’ April 2026 appointment of Ausenco for a standalone operation scoping study suggests this enlarged resource base will likely be fed directly into mine design and throughput trade‑offs, rather than remaining a purely exploration‑stage inventory.

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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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