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    Metalkol Copper Mark milestone: ESG and tailings design notes for mine engineers

    February 24, 2026|

    Reviewed by Joe Ashwell

    First reported on International Mining – News

    30 Second Briefing

    ERG’s Metalkol tailings reprocessing complex in the Democratic Republic of the Congo has become the first dedicated tailings operation globally to receive The Copper Mark, a responsible production assurance standard originally developed for primary copper mines and smelters. The Kingamyambo Musonoi Tailings (KMT) project reprocesses historic copper‑cobalt tailings from the Kolwezi area, recovering metal from legacy waste rather than new ore extraction. The certification signals that tailings storage, water management and labour practices at Metalkol have been independently assessed against Copper Mark’s ESG and supply chain criteria.

    Technical Brief

    • Metalkol is operated by La Compagnie de Traitement des Rejets de Kingamyambo SA, an ERG subsidiary.

    Our Take

    Within our 2056 tag-matched pieces on Projects/Standard/Guideline/Sustainability, Metalkol is one of very few tailings-only operations to feature, signalling that dedicated reprocessing sites are starting to be assessed against the same ESG benchmarks as primary mines.

    Eurasian Resources Group appears only sporadically in our 1092 Mining stories, so Copper Mark recognition at the Metalkol site is likely to become a reference point for ERG when negotiating offtake or finance that is contingent on third-party ESG assurance.

    For practitioners, a tailings project like Metalkol entering The Copper Mark system suggests that future responsible-sourcing audits may need more detailed disclosure on legacy waste liabilities and reprocessing performance, not just on conventional mine operations.

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    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.

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