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    Clarks Gully standout intercept: underground design notes for Hillgrove teams

    January 8, 2026|

    Reviewed by Tom Sullivan

    Clarks Gully standout intercept: underground design notes for Hillgrove teams

    First reported on Australian Mining

    30 Second Briefing

    Recent diamond drilling at Larvotto Resources’ Clarks Gully prospect within the Hillgrove gold–antimony project in New South Wales has returned a “standout intercept”, strengthening the case for higher-grade underground mineralisation. The work forms part of a targeted diamond programme testing extensions of known lodes beneath historical workings at Hillgrove, a past producer with multiple steeply dipping, narrow-vein structures. For geotechnical and mine planning teams, the results point to continued focus on underground access, ground support in vein-hosted systems, and potential sequencing of gold–antimony stopes.

    Technical Brief

    • Core orientation and structural logging are being used to refine vein geometry and continuity models.
    • Steeply dipping, narrow-vein sets at Hillgrove favour selective underground stoping over bulk open-pit methods.
    • Historical underground development provides partial access but will require rehabilitation and modern ground support standards.
    • Antimony–gold association implies variable metallurgical domains, influencing stope sequencing and plant configuration.
    • Existing underground voids and remnant pillars necessitate detailed 3D void modelling for geotechnical stability assessments.
    • Similar vein-hosted antimony–gold systems often adopt tight-spaced drilling to constrain grade variability and dilution risk.

    Our Take

    Hillgrove is one of the relatively few gold–antimony projects in our 530 Mining-story database, which suggests Larvotto Resources is positioned in a niche critical-mineral space rather than in the crowded pure-gold project pipeline.

    NSW projects in our coverage often report longer lead times around permitting and heritage engagement than comparable gold work in WA or Queensland, so strong intercepts at the Clarks Gully prospect may be used to justify early stakeholder and infrastructure planning rather than a slow-burn exploration approach.

    Gold–antimony combinations in our database are frequently linked to refractory or complex ore types, implying that positive drilling at Hillgrove will likely need to be matched with metallurgical testwork and flowsheet optimisation to ensure both metals can be economically recovered.

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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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