Amigo Resources (LSE:AMGO), the London-listed critical minerals and gold explorer operating in Tanzania, said independent laboratory testing returned combined platinum group metal (PGM) values of 6.94 to 7.07 parts per million (ppm) across samples.
The results, from the African Minerals and Geosciences Centre, point to osmium-iridium-rich material potentially consistent with osmiridium, alongside associated palladium.
Separate testing by SGS confirmed residual gold grades of 3.27 to 3.47 ppm in the same tailings and process residues.
Amigo plans to fold proprietary PGM concentration circuits into processing plants already under design, aiming to recover PGM-bearing minerals from gravity tailings and other residual material.
A small-scale furnace has been mobilised to Tanzania to evaluate a pyrometallurgical route that would combine PGM concentrates with copper and sulphur-bearing material into a saleable copper matte, a step still subject to engineering, environmental and regulatory approval.
At the Kabete project, the company is validating an approximately 20,000-metre historical drilling database alongside micro-seismic surveys, work intended to support an initial JORC-compliant resource estimate.
Following its memorandum of understanding with Tanzania's State Mining Corporation (STAMICO), Amigo's geological team completed reconnaissance across 13 historic mine-waste dumps at Mererani, identifying visible graphite flakes and a preliminary surface inventory of 1.58 million to 1.97 million tonnes.
That could translate to 74,800 to 279,900 tonnes of recoverable graphite concentrate at a 95% carbon grade, assuming 90% recovery.
"Demonstrating PGM values exceeding 7 ppm alongside significant graphite potential underscores the immediate metallurgical and resource upside ahead of us," said Craig Ransley, Amigo's executive chair.
The next phase of work will focus on systematic sampling, flotation testing and pilot-scale evaluation to establish commercial viability.
News Intelligence what this means for the company
Amigo Resources reported laboratory-confirmed PGM values of 6.94–7.07 ppm in tailings and process residues from its Tanzanian projects, alongside a preliminary graphite inventory of 1.58–1.97 million tonnes at Mererani mine-waste dumps. The company plans to integrate PGM concentration circuits into processing plants already under design and is evaluating a pyrometallurgical route via small-scale furnace trials, but both pathways remain subject to engineering, environmental and regulatory approval—meaning commercial viability is not yet established.
The PGM and graphite findings expand the resource base beyond the gold recovery work already underway at Mojimoto and Kabete, but both new commodities are at early-stage validation; flotation testing and pilot-scale evaluation are still ahead. Until metallurgical and regulatory hurdles clear, these remain exploration upside rather than near-term production drivers.
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