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
    Projects
    Contract Award

    Fortuna’s US$1B Diamba Sud gold project: capex, returns and schedule for mine planners

    July 1, 2026|

    Reviewed by Joe Ashwell

    Fortuna’s US$1B Diamba Sud gold project: capex, returns and schedule for mine planners

    First reported on MINING.com

    30 Second Briefing

    Fortuna Mining’s Diamba Sud open pit gold project in eastern Senegal now carries a post-tax NPV (5%) of US$1 billion, a 9.4‑year mine life and probable reserves of 20.5 Mt at 1.75 g/t for 1.1 Moz, based on a US$3,500/oz gold price. The feasibility study lifts total forecast production 25% to 1 Moz but raises initial capex 40% to US$398 million and all‑in sustaining costs to US$1,332/oz, cutting IRR to 60%. Early works, including an access road and camp expansion budgeted at US$73 million, could lead to full construction in Q4 2026 and first gold by Q2 2028.

    Technical Brief

    • Feasibility study assumes a base case gold price of US$3,500/oz, up from US$2,750/oz in the PEA.
    • Analyst Kevin O’Halloran now assigns Diamba Sud a net asset value of US$896 million, up 12%.
    • Total forecast gold output is 25% higher than the PEA, at 1 Moz over the mine life.
    • Internal rate of return has dropped by 12 percentage points, now reported at 60% post-tax.
    • Early works budget of US$73 million covers access road construction and expansion of the accommodation camp.
    • Site lies ~600 km east of Dakar in the Kenieba-Koudougou inlier, near other large gold deposits.
    • Fortuna acquired Diamba Sud in 2023 via its purchase of Africa-focused explorer Chesser Resources.
    • Séguéla mine expansion is forecast to lift that operation’s annual output 40% to 214,000 oz by 2029, framing regional processing and logistics synergies.

    Our Take

    Fortuna Mining’s push at Diamba Sud and the Séguéla mine mirrors the 2025-12-15 piece in our database that flagged a strategic pivot to West Africa to rebuild roughly 500,000 oz/y of gold output, suggesting Diamba Sud is being sized as part of a multi-asset regional platform rather than a standalone bet on Senegal.

    With Diamba Sud’s post-tax NPV of about US$1 billion against a market capitalisation of roughly C$3.5 billion, Fortuna is allocating a large share of its equity value to a single Senegal gold asset, which typically increases investor scrutiny on execution risk and permitting timelines in eastern Senegal and the Kenieba-Koudougou inlier.

    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

    Veyex nylon rollers at Gudai-Darri: reliability and load lessons for mine engineers
    Mining
    about 12 hours ago

    Veyex nylon rollers at Gudai-Darri: reliability and load lessons for mine engineers

    Veyex has trialled heavy-duty nylon conveyor rollers at Rio Tinto’s Gudai-Darri iron ore mine in Western Australia, where previous high-density polyethylene (HDPE) rollers were failing prematurely under high-tension loads. The case study covered two specific conveyor applications, with the nylon rollers subjected to extreme belt tensions and impact loading typical of large-scale iron ore handling. Results showed markedly improved roller durability and reduced maintenance interventions, signalling potential lifecycle and reliability gains for high-load overland and plant conveyors in similar hard rock operations.

    Suncor Cat AHS at Mildred Lake and Komatsu Mud Mode: integration notes for mine planners
    Mining
    1 day ago

    Suncor Cat AHS at Mildred Lake and Komatsu Mud Mode: integration notes for mine planners

    Suncor has commissioned its first Autonomous Operating Zone at Syncrude’s Mildred Lake oil sands mine, extending its autonomous haulage system deployment beyond the existing fleet of about 140 autonomous trucks already running at other Suncor sites. The new zone uses Cat AHS fleets under Suncor control (since late 2021) and is complemented by Komatsu AHS trucks at Base Plant operating with a dedicated “Mud Mode” to maintain traction and control in soft ground. For mine planners, this signals wider-scale AHS integration across multiple pits and variable ground conditions.

    Central Nevada Gold’s Mule Canyon acquisition: project and risk lens for engineers
    Mining
    3 days ago

    Central Nevada Gold’s Mule Canyon acquisition: project and risk lens for engineers

    Central Nevada Gold has completed a US$20 million acquisition of Newmont’s past‑producing Mule Canyon mine in Nevada, targeting a prefeasibility study and key permits in H2 2027 ahead of a potential 2028 construction decision. Mule Canyon previously produced about 500,000 oz gold at an average head grade of 3.8 g/t with ~94% metallurgical recovery, and comes with a database of 2,149 drill holes totalling over 335,000 metres across six mineralised zones over 2.5 km. The company plans an IPO as early as 2027 after a 20‑hole metallurgical and infill drilling programme to upgrade inferred resources and de‑risk the project.

    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.

    AllGeotechnicalInfrastructureHazardsEnvironmental