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    ION Minerals lithium brine expansion: resource scale and project lens for engineers

    April 1, 2026|

    Reviewed by Joe Ashwell

    ION Minerals lithium brine expansion: resource scale and project lens for engineers

    First reported on MINING.com

    30 Second Briefing

    ION Minerals has expanded its lithium brine portfolio to just over 280,000 mineral acres across the Smackover Formation in East Texas/Arkansas, the Texas Panhandle and Saskatchewan’s Duperow Formation, with adjacent Smackover projects reporting 47–60 tonnes LCE per acre. The company now controls nearly 50,000 acres between Tetra Technologies’ Evergreen Brine Unit and Standard Lithium’s Reynolds and Franklin units, plus 65,000 acres in the Texas Panhandle where internal work suggests up to 2.4 million tonnes LCE in place. A further 165,000 acres in southeast Saskatchewan could host up to 2.5 million tonnes LCE, with multi-bench Duperow drilling and testing scheduled for summer 2026.

    Technical Brief

    • Smackover Formation brines extend from Florida to Texas, providing a laterally continuous lithium-bearing reservoir system.
    • Analysts estimate the Smackover could host over 4 million metric tonnes lithium, supporting multi-decade brine operations.
    • Reported resource densities of 47–60 t LCE/acre on adjacent Smackover projects give strong analogues for scoping ION’s development cases.
    • The Texas Panhandle position sits inside a ~500,000‑acre Area of Interest, allowing staged expansion beyond current leases.
    • Saskatchewan tenure targets multiple productive benches within the Duperow Formation, implying stacked brine horizons and higher vertical well productivity.
    • Drilling and multi-bench testing in Southeast Saskatchewan are scheduled to commence in summer 2026, setting the earliest window for site-specific flow and chemistry data.
    • Portfolio spread across Smackover and Duperow brine systems reduces geological concentration risk and offers optionality on differing DLE process routes.

    Our Take

    With analyst estimates of about 4 million metric tons lithium in the Smackover Formation and a further 4.9 million tonnes LCE potential across the Texas Panhandle and Saskatchewan positions, ION Minerals is positioning itself at a scale comparable to the larger brine clusters that dominate our lithium project coverage, rather than as a niche play.

    EnergyX’s recently commissioned Project Lonestar DLE plant in the Texas Smackover, also covered in our database, suggests that ION’s Smackover and Texas Panhandle brine assets could have access to emerging local processing know‑how and potential tolling or technology-partner options by the Summer 2026 horizon.

    Saskatchewan’s Duperow Formation position gives ION Minerals a Canadian counterweight to its US Smackover and Texas Panhandle assets, which may help with permitting and offtake diversification as North American OEMs seek to balance US and Canadian lithium supply in their procurement portfolios.

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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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