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    Pantoro’s third underground mine at Norseman: sequencing and design notes for planners

    March 10, 2026|

    Reviewed by Tom Sullivan

    Pantoro’s third underground mine at Norseman: sequencing and design notes for planners

    First reported on Australian Mining

    30 Second Briefing

    Pantoro Gold will start developing a third underground mine at its Norseman gold project in Western Australia later this year, expanding beyond the existing OK and Scotia underground operations. The new decline will target additional high-grade lodes within the historic Norseman field, where past production has exceeded 5Moz, using conventional longhole stoping and existing processing capacity at the 1Mtpa Norseman plant. For geotechnical and mine planners, the move signals further sequencing of narrow-vein underground stopes and potential updates to ground support and dewatering strategies across the multi-mine complex.

    Technical Brief

    • Additional underground source increases scheduling complexity for backfill, ventilation and dewatering across the integrated mine plan.
    • For similar brownfields gold camps, the case reinforces value in re‑entering historic lodes via modern underground methods.

    Our Take

    Gold projects in WA feature heavily in our mining database, and Norseman’s move to a third underground front suggests Pantoro Gold is positioning the asset more as a multi-mine camp than a single-mine restart, which typically supports longer-term mill utilisation and contractor retention.

    Within the 1999 tag-matched ‘Projects’ and ‘Contract Award’ pieces, WA gold developments often use staged underground expansions like this to de-risk capital and reconcile resource models, so the new Norseman mine is likely aimed at smoothing grade profiles and backing up existing stoping areas.

    Among the 346 gold-related items in our coverage, Australian underground gold operations in WA commonly face labour and cost pressure; adding another underground mine at Norseman later this year may give Pantoro Gold more flexibility to sequence higher-margin stopes if input costs continue to rise.

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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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