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
    Research
    Safety
    Sustainability

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

    December 11, 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

    Jacobs’ Oldbury environmental baselining: implications for nuclear site design
    Environmental
    3 days ago

    Jacobs’ Oldbury environmental baselining: implications for nuclear site design

    Jacobs has been appointed by Great British Energy – Nuclear to deliver environmental consultancy and baselining at the Oldbury site in Gloucestershire, earmarked as a potential location for a new nuclear power station. The work will characterise existing ground, groundwater, ecological and radiological conditions to support future nuclear site licensing, environmental permits and design optioneering. Early baselining data will be critical for later geotechnical investigations, foundation design, flood and coastal risk assessments, and long-term monitoring strategies if the project proceeds.

    UK Government NbS catchment study: hydrological design notes for engineers
    Environmental
    14 days ago

    UK Government NbS catchment study: hydrological design notes for engineers

    A UK Government research paper concludes that Nature-based Solutions such as floodplain reconnection, riparian woodland and leaky barriers are most effective when planned and modelled across whole catchments rather than as isolated site schemes. The study stresses integrating NbS with existing hard defences, using hydrological and hydraulic modelling to quantify peak flow attenuation and downstream level reductions under design storm events. For civil and drainage engineers, this points to earlier basin-scale option appraisal, multi-landowner agreements and long-term monitoring of storage volumes, infiltration rates and sediment behaviour.

    Dalton Quarry biodiversity bank: BNG design and land-take notes for project teams
    Environmental
    17 days ago

    Dalton Quarry biodiversity bank: BNG design and land-take notes for project teams

    A former Ibstock extraction site, Dalton Quarry, is being converted by Green Earth Developments Group into a biodiversity “bank” of engineered habitats to generate tradable biodiversity net gain (BNG) units for UK infrastructure schemes. The project will create a mosaic of habitat types on previously worked quarry land, allowing developers to purchase pre-accredited BNG units rather than delivering all ecological uplift within constrained project footprints. For civil and geotechnical teams, this model could influence land-take, earthworks design and long-term aftercare obligations on major road, rail and housing projects.

    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.