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
    Research
    Safety
    Sustainability

    Deep-sea mining trial impacts on seabed fauna: key findings for project teams

    December 12, 2025|

    Reviewed by Joe Ashwell

    Deep-sea mining trial impacts on seabed fauna: key findings for project teams

    First reported on MINING.com

    30 Second Briefing

    Deep-sea mining tests in the Clarion–Clipperton Zone at 4,280 metres depth, commissioned by Nauru Ocean Resources (a The Metals Company subsidiary), cut macrofaunal density by 37% and species richness by 32% along machine tracks over two years, based on disturbance of 3,000 tonnes of polymetallic nodules. European researchers from the Natural History Museum, University of Gothenburg and the National Oceanography Centre collected 4,350 sediment macrofaunal animals and identified 788 species, mainly polychaete worms, crustaceans and molluscs. The trial used machines only about half the size of planned commercial systems, raising concern that full-scale operations could cause larger, possibly irreversible, benthic impacts.

    Technical Brief

    • Trial disturbed 3,000 tonnes of polymetallic nodules in the Clarion–Clipperton Zone, central Pacific.
    • Work was conducted at 4,280 m water depth, within Nauru Ocean Resources’ NORI contract area.
    • Research campaign spanned five years, including >160 ship-days and ~3 years of laboratory analysis.
    • Sampling across four expeditions recovered 4,350 sediment macrofaunal specimens, classified into 788 distinct species.
    • Taxa were dominated by polychaete annelids, followed by isopods, tanaids, amphipods, snails and clams.
    • A new solitaire coral species was discovered, indicating incomplete baseline biodiversity knowledge in the CCZ.
    • Authors note impacts were assessed mainly for sediment-dwelling macrofauna, so responses of megafauna and pelagic biota remain unresolved.

    Our Take

    With an estimated 21 billion tonnes of minerals in the Clarion–Clipperton Zone, the 37% macrofaunal density and 32% species richness losses reported here sharpen the trade-off facing cobalt and nickel supply chains that are already under pressure from 2025 quota discussions in conventional producers such as Congo.

    The CCZ’s 6 million km² footprint means that even localised disturbance patterns, if repeated across multiple licence blocks held by operators like Nauru Ocean Resources (linked to The Metals Company), could scale into basin-level ecological change that regulators will need to factor into ISA exploitation rules.

    Among our relatively few Environmental stories, this is one of the more data-rich deep-sea pieces, and the 788 species identified will likely become a reference baseline for future impact assessments that battery-metal offtakers and ESG auditors demand from Pacific polymetallic nodule projects.

    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

    NWS £382M LLWR vault optimisation: capping design notes for ground engineers
    Environmental
    about 1 hour ago

    NWS £382M LLWR vault optimisation: capping design notes for ground engineers

    Market engagement has opened for a £382M vault optimisation and capping delivery contract at Nuclear Waste Services’ Low Level Waste Repository (LLWR) in Cumbria, signalling a major phase of engineered containment works. The package is expected to cover optimisation of existing disposal vaults and installation of multi-layer capping systems over legacy trenches and vaults to long-term standards for low-level radioactive waste isolation. Contractors will need deep experience in complex earthworks, geosynthetic barrier systems, and long-duration performance of engineered covers in aggressive coastal conditions.

    United Utilities peatland and woodland drive: runoff and slope insights for engineers
    Environmental
    1 day ago

    United Utilities peatland and woodland drive: runoff and slope insights for engineers

    United Utilities has created new woodlands and restored peatlands across more than 2,200 football pitches’ worth of land at its North West water catchment sites, signalling a major landscape-scale intervention in source protection. Large-scale peatland preservation and tree planting in upland catchments can materially reduce peak runoff, improve raw water quality by cutting colour and turbidity, and stabilise slopes, with long-term implications for reservoir yield, treatment costs and geotechnical performance of adjacent infrastructure.

    United Utilities’ £30M ‘spongier’ Liverpool: retrofit SuDS design notes for engineers
    Environmental
    8 days ago

    United Utilities’ £30M ‘spongier’ Liverpool: retrofit SuDS design notes for engineers

    United Utilities has announced a £30M programme to retrofit sustainable drainage across Liverpool, aiming to make the city “spongier” by intercepting and attenuating rainfall before it reaches combined sewers. Measures are expected to include permeable paving, rain gardens and other SuDS features on highways and public realm to cut surface runoff volumes and peak flows during intense storms. For civil and drainage engineers, the scheme signals more retrofit SuDS design in dense urban streetscapes, with a premium on hydraulic modelling, utility coordination and constructability in constrained corridors.

    Related Industries & Products

    Mining

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