Geomechanics.io

  • Free Tools
Sign UpLog In

Geomechanics.io

Geomechanics, Streamlined.

© 2026 Geomechanics.io. All rights reserved.

Geomechanics.io

CMRR-ioGEODB-ioHYDROGEO-ioQCDB-ioFree Tools & CalculatorsBlogLatest Industry News

Industries

MiningConstructionTunnelling

Company

Terms of UsePrivacy PolicyLinkedIn
    AllGeotechnicalMiningInfrastructureMaterialsHazardsEnvironmentalSoftwarePolicy
    Projects
    Contract Award

    Perpetua’s $2.7bn EXIM funding: Stibnite gold‑antimony capex and returns for engineers

    March 31, 2026|

    Reviewed by Joe Ashwell

    Perpetua’s $2.7bn EXIM funding: Stibnite gold‑antimony capex and returns for engineers

    First reported on MINING.com

    30 Second Briefing

    Perpetua Resources has entered the final approval stage for a proposed US EXIM $2.7 billion financing package, including a $2.2 billion direct loan, to cover the estimated $2.58 billion initial capex for its Stibnite gold‑antimony project in central Idaho, with a board vote expected shortly after a 25‑day Congressional notice. The updated technical summary outlines a 15‑year mine life producing over 4.2 million oz gold and 106.5 million lb antimony, with a base‑case after‑tax NPV5 of $3.5 billion, 23.5% IRR and 2.4‑year payback at $3,250/oz gold.

    Technical Brief

    • US EXIM package comprises a $2.2 billion direct loan plus capitalised interest and fees.
    • Perpetua reports year-end cash on hand of $714 million to complement EXIM funding.
    • EXIM has issued a 25‑day Congressional notice, after which its board will vote.
    • Basic engineering for Stibnite was completed in 2025 and underpins the updated technical summary.
    • Initial capex has increased by over $300 million relative to the 2025 cost update.
    • Stibnite is one of few known US antimony sources and among the largest outside China’s control.
    • The project entered early construction in October after securing all required federal and state permits.
    • Stibnite is designated under the FAST‑41 programme, giving an expedited federal permitting framework.
    • Key financial backers include JPMorgan and Agnico Eagle Mines alongside the proposed EXIM facility.

    Our Take

    With Beaver Brook in Canada on care and maintenance under China Minmetals, Stibnite’s antimony output in Idaho would materially shift North American supply away from Chinese-controlled primary sources, which is likely a key driver behind US EXIM’s willingness to cover essentially the full initial capex.

    Earlier coverage of Perpetua’s modular pilot plant with Idaho National Laboratory and US Army-linked bodies signals that Stibnite’s antimony stream is already embedded in US defence-supply testing, so this financing effectively underwrites a pathway from pilot-scale qualification to long-term domestic offtake.

    Geotechnical Software for Modern Teams

    Centralise site data, logs, and lab results with GEODB-io, CMRR-io, and HYDROGEO-io.

    No credit card required.

    • Save and export unlimited calculations
    • Advanced data visualisation
    • Generate professional PDF reports
    • Cloud storage for all your projects

    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.

    Related Articles

    Perenti appoints Vanessa Torres as CEO: contract mining and decarbonisation lens
    Mining
    about 2 hours ago

    Perenti appoints Vanessa Torres as CEO: contract mining and decarbonisation lens

    Perenti Limited has appointed Dr Vanessa Torres as managing director and chief executive officer, succeeding long‑serving CEO Mark Norwell at the ASX‑listed mining services group that operates Barminco and Ausdrill across underground and open‑pit contracts. Torres, a former chief technical officer at South32 and senior executive at BHP and Vale, brings deep experience in large‑scale iron ore, base metals and coal operations, including brownfield expansion and asset optimisation. The leadership change signals continuity for Perenti’s contract mining, drill‑and‑blast and underground development business while positioning it to pursue more technically complex projects and decarbonisation initiatives.

    Rio Tinto’s $1.8m Lifeline WA support: psychosocial risk lessons for mine teams
    Mining
    about 2 hours ago

    Rio Tinto’s $1.8m Lifeline WA support: psychosocial risk lessons for mine teams

    Rio Tinto has committed $1.8 million to Lifeline WA to fund crisis support volunteers answering calls across Western Australia, with a focus on remote mining communities in the Pilbara. The three-year funding package will support recruitment, training and retention of telephone crisis supporters, who handle calls from FIFO workers, contractors and families affected by isolation, shift work and mental health pressures. For mine operators, the move signals continued expectation for structured psychosocial risk management alongside traditional safety systems on large iron ore operations.

    Larvotto’s tungsten boom at Hillgrove: restart and recovery notes for mine planners
    Mining
    about 2 hours ago

    Larvotto’s tungsten boom at Hillgrove: restart and recovery notes for mine planners

    Tungsten prices hitting record highs have prompted Larvotto Resources to fast‑track work at its Hillgrove polymetallic project in New South Wales, targeting historically mined tungsten–antimony–gold lodes within an existing underground mine and processing footprint. The company is reviewing past production data and existing plant configuration to define a restart pathway that can exploit current prices without greenfield capital intensity. For mine planners and metallurgists, the key question is how far the legacy stopes, tailings and circuit can be re‑optimised for higher tungsten recoveries under today’s market conditions.

    Related Industries & Products

    Mining

    Geotechnical software solutions for mining operations including CMRR analysis, hydrogeological testing, and data management.

    Construction

    Quality control software for construction companies with material testing, batch tracking, and compliance management.

    CMRR-io

    Streamline coal mine roof stability assessments with our cloud-based CMRR software featuring automated calculations, multi-scenario analysis, and collaborative workflows.

    HYDROGEO-io

    Comprehensive hydrogeological testing platform for managing, analysing, and reporting on packer tests, lugeon values, and hydraulic conductivity assessments.

    GEODB-io

    Centralised geotechnical data management solution for storing, accessing, and analysing all your site investigation and material testing data.