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

    Erdene’s Bayan Khundii gold mine: capex, ramp-up and district upside for engineers

    December 20, 2025|

    Reviewed by Tom Sullivan

    Erdene’s Bayan Khundii gold mine: capex, ramp-up and district upside for engineers

    First reported on MINING.com

    30 Second Briefing

    Erdene Resource Development has poured first gold at its Bayan Khundii open-pit mine in southwest Mongolia and is ramping to nameplate output of 85,000 oz. per year from a 650,000 tpa plant, underpinned by 3.8 Mt of proven and probable reserves grading 3.8 g/t gold and 1.7 g/t silver for a six-year mine life. The 50-50 joint venture with Mongolian Mining Corporation has invested about $115 million, installed a 240 km power line from Inner Mongolia and employs roughly 500 people, signalling district-scale intent. Nearby Zuun Mod, 35 km east, holds 271 Mt measured and indicated at 0.06% Mo and 0.06% Cu plus similar-scale inferred resources, positioning it as a potential major molybdenum-copper supplier to China.

    Technical Brief

    • Open pit shell was optimised at US$1,800/oz gold, leaving higher-price upside immediately west of the current design.
    • CEO estimates 150,000–200,000 oz additional gold could be drilled within open-pittable depths adjacent to the pit.
    • Bayan Khundii, Dark Horse and Ulaan are interpreted as a single 10–12 km interconnected hydrothermal structural corridor.
    • Erdene Mongol JV plans about US$9 million exploration spend in 2026, tripling the 2025 budget.

    Our Take

    Among the 401 Mining stories in our database, Mongolia appears far less frequently than Latin American or African jurisdictions, so Bayan Khundii and the nearby Zuun Mod copper–molybdenum system position Erdene Resource Development as one of the few non‑Chinese, non‑Rio Tinto operators with a multi‑commodity growth pipeline in the country.

    The combination of a relatively modest US$115 million mine-and-plant capex at Bayan Khundii and the much larger, low‑grade Zuun Mod resource suggests Erdene Mongol’s 50–50 JV with Mongolian Mining Corporation could evolve into a hub‑and‑spoke district model, where early gold cash flow helps de‑risk later copper–molybdenum development.

    With copper and gold both prominent in the 193 keyword‑matched pieces in our coverage, the scale of in‑situ metal at Zuun Mod (about US$10 billion equivalent) means this district could become a meaningful regional competitor to other Asian porphyry and molybdenum camps once infrastructure and power (240 km from the Chinese border) are resolved.

    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

    Scope Systems cyber attack: resilience and risk lessons for mining IT teams
    Mining
    about 17 hours ago

    Scope Systems cyber attack: resilience and risk lessons for mining IT teams

    A ransomware attack on Perth-based Scope Systems’ Pronto Xi ERP cloud stack disrupted dozens of mining customers, including Northern Star Resources and Evolution Mining, in what MM‑ISAC’s Rob Labbe calls the broadest single third‑party cyber event the sector has seen. Scope says client servers were restored from backups and not directly accessed, but admits internal data was exfiltrated and has not disclosed the attack vector, raising questions about visibility at hypervisor, storage and backup layers. The incident spotlights how multi‑tenant vCenter/ESXi environments, VM cloning and snapshot abuse—already used by groups like Akira—could expose integrated exploration, production and maintenance data across more than 400 Pronto Xi‑reliant mining operations.

    Newmont’s Red Chris underground expansion: block cave design and capex notes for engineers
    Mining
    about 17 hours ago

    Newmont’s Red Chris underground expansion: block cave design and capex notes for engineers

    Newmont’s Red Chris mine in British Columbia has secured an amended Environmental Assessment Certificate and Mines Act permit, allowing a shift from open-pit to underground block caving and extending operations into the mid-2040s. The copper-gold porphyry deposit in the Golden Triangle hosts an estimated 20 million oz of gold and 13 billion lb of copper, with the block cave expected to lift Canada’s copper output by about 15%. The project entails several billion dollars in capital, around 1,800 construction jobs and roughly 1,500 operating roles at peak.

    Goldman cuts gold price forecast to US$4,900: planning notes for mine projects
    Mining
    about 17 hours ago

    Goldman cuts gold price forecast to US$4,900: planning notes for mine projects

    Goldman Sachs has cut its end‑2026 gold price forecast by US$500/oz to US$4,900/oz after the US Federal Reserve, under new chair Kevin Warsh, signalled a hawkish shift that has pushed market-implied December rate hike odds to 87%. Spot gold has already fallen to about US$4,100/oz, down 27% from its near‑US$5,600/oz January peak, with three consecutive monthly losses between March and May and a 4% year‑to‑date decline. Goldman warns a 2026 year‑end target as low as US$4,400/oz is possible if rates rise, partly offset by ongoing central‑bank buying of roughly 50 tonnes/month this year and 40 tonnes/month next year.

    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.

    AllGeotechnicalMiningInfrastructureMaterialsHazardsEnvironmentalSoftwarePolicy