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    Tungsten Mining at Mt Mulgine: thicker zones and pit design impacts for engineers

    October 16, 2026|

    Reviewed by Joe Ashwell

    Tungsten Mining at Mt Mulgine: thicker zones and pit design impacts for engineers

    First reported on Australian Mining

    30 Second Briefing

    Tungsten Mining has intersected tungsten mineralisation up to 45m thicker than modelled at the Mulgine Trench deposit within its Mt Mulgine project in Western Australia, with initial results from 16 reverse circulation drill holes including a standout 292m at 0.11 per cent WO₃. The thicker-than-expected zones suggest scope to materially increase the existing resource and may support changes to pit shell design, strip ratios and long-term mine scheduling. Geologists and mining engineers will need to revisit block models and grade-tonnage scenarios as further assays are received.

    Technical Brief

    • Broad mineralised intervals from single holes reduce reliance on downhole compositing for grade estimation.
    • RC chip logging will refine lithological and alteration boundaries controlling tungsten distribution in the trench area.
    • New intercept geometries are likely to affect geotechnical domains used for pit slope design.
    • Additional drilling data will improve density of sample support for variography and kriging of WO₃ grades.
    • Updated geometry may change waste–ore contact positions, influencing haul profiles and in-pit dump placement.
    • Outcomes provide a live case of how RC drilling campaigns can materially reframe open-pit tungsten project economics.

    Our Take

    Mt Mulgine in Western Australia and Watershed in Far North Queensland give Tungsten Mining two advanced tungsten assets in different jurisdictions, which in our database is unusual for a junior and can help diversify permitting and logistics risk across states.

    The 292 m of 0.11 per cent tungsten at the Mulgine Trench deposit suggests a large-tonnage, lower-grade style of mineralisation that could complement the more conventionally framed Watershed project, giving the company optionality between scale-driven and grade-driven development pathways.

    Recent related coverage shows Tungsten Mining pushing Watershed towards a final investment decision with debt and equity advisers already mandated, so stronger-than-modelled mineralisation at Mt Mulgine may improve the company’s overall financing narrative by demonstrating a deeper tungsten pipeline beyond a single Queensland project.

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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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