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    Saturn’s Apollo Hill and Ausenco study: design and pit optimisation notes for engineers

    April 9, 2026|

    Reviewed by Joe Ashwell

    Saturn’s Apollo Hill and Ausenco study: design and pit optimisation notes for engineers

    First reported on Australian Mining

    30 Second Briefing

    Saturn Metals has reported new high-grade gold intercepts at its Apollo Hill project in Western Australia and appointed Ausenco to complete a scoping study for a standalone gold operation. The work will assess processing options for the large, low-grade Apollo Hill resource using Ausenco’s gold plant design expertise, including trade-offs around throughput, recoveries and capital intensity. For mine planners and geotechs, the study outcome will shape pit shell optimisation, cut-off grade strategy and geotechnical design parameters for a potential new open pit development in the Eastern Goldfields.

    Technical Brief

    • Geotechnical inputs will be coordinated to align pit slope design with preferred plant location and haul profiles.
    • Study scheduling is structured to feed updated resource and geotechnical models into iterative pit optimisation runs.
    • Metallurgical testwork will focus on grind-size versus recovery trade-offs to constrain mill sizing and power demand.
    • Infrastructure options under review include raw water sourcing, power supply configuration and plant access road alignments.

    Our Take

    Saturn Metals’ earlier move to mobilise extra RC rigs at Apollo Hill in Western Australia (2025-11-24 item) suggests the Ausenco study is likely being fed by a growing dataset, which can materially tighten resource models and plant throughput assumptions at this stage.

    Ausenco’s recent EPCM mandate on Rex Minerals’ Hillside copper–gold project in South Australia shows it is currently building a strong Australian gold/copper project pipeline, which can give Saturn Metals access to up-to-date benchmarking on capex and flowsheet choices for mid-tier gold operations.

    Within our mining-projects coverage, Ausenco’s parallel work on gold in Finland (Ikkari) and base metals in Brazil (Jervois refinery) indicates the Apollo Hill study will benefit from process design experience across a wide range of ore types and climates, useful if Saturn tests different processing routes or staged expansions.

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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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