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    Astral’s Spargoville gold resource uplift: pit design and scheduling notes for engineers

    October 12, 2026|

    Reviewed by Joe Ashwell

    Astral’s Spargoville gold resource uplift: pit design and scheduling notes for engineers

    First reported on Australian Mining

    30 Second Briefing

    Astral Resources has doubled the mineral resource estimate at its Spargoville gold project in Western Australia, lifting it 102 per cent to 281,000oz after re-estimating four deposits using a higher gold price assumption. The revised model covers the project’s second-largest gold asset in Astral’s portfolio and is expected to influence pit shell optimisation, mine scheduling and cut-off grade selection. For geotechnical and mine planning teams, the larger inventory may justify expanded drilling, updated slope designs and reworked economic envelopes around the re-estimated lodes.

    Technical Brief

    • Re-estimation focused on four discrete Spargoville deposits rather than the full project inventory.
    • Higher assumed gold price directly affects Lerchs–Grossmann pit shells and revenue-factor shell selection.
    • Revised resource will require updated geotechnical domains tied to the new economic pit limits.
    • Additional geotechnical drilling likely needed along new pit wall extents to refine slope design parameters.
    • Mine scheduling will need re-optimisation to sequence the four deposits under the new economic envelope.
    • Cut-off grade changes will alter waste–ore discrimination, influencing haul profiles and dump capacities.
    • Metallurgical testwork and recovery assumptions may need revisiting to align with the expanded mineable inventory.
    • Similar Western Australian open pits using higher price decks have typically seen steeper optimised slope configurations.

    Our Take

    The 102 per cent resource uplift at Spargoville comes on the heels of Astral’s high‑grade hits at the Wattle Dam prospect (29 March 2026), suggesting the broader Spargoville camp is firming up as a genuine satellite ore source alongside Mandilla rather than a pure exploration play.

    Astral’s recent moves to secure ‘unfettered control’ over Mandilla tenure (28 September 2026) and to acquire nickel rights over Spargoville ground (6 October 2026) indicate a strategy to consolidate both gold and nickel optionality in this part of Western Australia, which could support future hub‑and‑spoke processing scenarios.

    Within our 1266 Mining stories and 425 gold‑tagged pieces, Astral Resources now appears frequently in Western Australian gold coverage, signalling that it is transitioning from a junior explorer into a more advanced project developer watched by regional operators and contractors.

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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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