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    Alligator Energy’s Big Lake uranium: redox model insights for project geologists

    August 25, 2026|

    Reviewed by Tom Sullivan

    Alligator Energy’s Big Lake uranium: redox model insights for project geologists

    First reported on Australian Mining

    30 Second Briefing

    Further uranium mineralisation has been confirmed at Alligator Energy’s Big Lake uranium project in South Australia, where 33 aircore holes totalling 4,112m have been completed. Follow‑up drilling at Site 10 intersected uranium mineralisation associated with the interpreted redox boundary between oxidised and reduced sediments, strengthening the company’s roll‑front exploration model. For geologists and hydrogeologists, the results support a redox‑controlled, sandstone‑hosted system, guiding placement of subsequent step‑out holes and refinement of groundwater sampling and downhole geophysics.

    Technical Brief

    • Aircore method minimises groundwater inflow and sample contamination, important for subtle redox geochemistry interpretation.
    • Stratigraphic logging refines sandstone unit correlations controlling permeability pathways for uranium-bearing fluids.
    • Results provide additional control points for hydrogeological modelling of flow directions along the mineralised sandstone horizons.
    • Integration of drilling with groundwater sampling will better constrain uranium mobility and potential ISR amenability at the project.

    Our Take

    Our database shows Alligator Energy’s recent focus has been on the Samphire ISR uranium project near Whyalla, so advancing the Big Lake uranium project in South Australia suggests the company is building a multi-asset uranium pipeline rather than a single-project story.

    With 33 aircore holes now completed at Big Lake’s Site 10, Alligator can start to apply learnings from the Samphire field leach and BFS work to quickly screen whether Big Lake has ISR-style potential or is better suited to a different development pathway.

    Among uranium-tagged pieces in our coverage, South Australia features prominently, indicating that Big Lake’s progress will be assessed by investors against other SA uranium plays that are already at BFS or field-trial stage, such as Samphire.

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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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