Amigo Resources PLC
(LSE:AMGO)
, a mining company specializing in gold and platinum group metals across Africa, has revealed initial metallurgical results from high-temperature collector-metal trial runs at its Tanzanian sites. The firm successfully produced a 10 kg copper-rich collector ingot enriched with osmium and iridium, fully recovered from historic gold processing tailings. Preliminary testing showed a combined osmium and iridium grade of 0.614% in the trial ingot, although the company emphasizes that independent representative assays are necessary before confirming these as official metal inventories. Investors await independent verification and updates on the company’s main gold production projects at Mojimoto and Kabete.
Key Points
- Amigo Resources PLC
(LSE:AMGO)
, registered in England and Wales, focusing on gold and PGM mining in Africa - Trial production of a 10 kg copper-rich collector ingot yielded preliminary grades of 0.519% osmium and 0.095% iridium, alongside 81.510% copper, 17.504% iron, and 0.021% gold
- All metals were extracted from historical gold processing tailings; these initial figures are preliminary and do not represent a JORC Mineral Resource or Ore Reserve
- Investors should monitor independent assay results, metallurgical mass-balance studies, and progress towards the targeted 600 TPD combined throughput for gold doré production
Initial Osmium and Iridium Concentrations Extracted from Tanzanian Historical Tailings
The 10 kg trial ingot produced during recent high-temperature furnace operations showed preliminary grades of 0.519% osmium (51.9 g) and 0.095% iridium (9.5 g), totaling a combined 0.614%. On a theoretical one-tonne equivalent basis, these results translate to approximately 5.19 kg of osmium and 0.95 kg of iridium. Amigo highlights that these values are preliminary, do not establish a representative bulk grade, and require independent PGM-specific assays before being confirmed as inventory. All feed material originated from historic gold processing tailings at the company’s Tanzanian project locations.
Advanced Pyrometallurgical Process Leveraging Over 15 Years of Patented Expertise
Amigo’s integrated recovery approach combines mineral concentration, controlled leaching, copper cementation, electrowinning, and furnace smelting to produce copper-rich metallic intermediates that capture associated precious metals. The company notes this program builds on more than 15 years of specialized technical experience and patented metallurgical innovations. On-site operations in Tanzania include primary mineral concentration and solution preparation using stationary reverberatory and induction furnaces, while advanced downstream smelting is conducted at external facilities in partnership with technical collaborators such as AK Corporation.
PGM Recovery as a Secondary Stream Complementing Core Gold Doré Production at Mojimoto and Kabete
Executive Chair Craig Ransley stated the PGM collector initiative reflects results from prior work rather than a strategic shift. The company remains focused on completing physical plant installations at Mojimoto and Kabete to reach a combined throughput target of 600 tonnes per day for gold doré production. The PGM recovery program is positioned as a high-value secondary stream supporting the core gold strategy, with ongoing offtake discussions involving regional and international marketing partners.
Commercial Rollout Dependent on Independent Verification and Economic Feasibility
Amigo emphasizes that any commercial deployment of the PGM recovery circuit will be contingent on successful metallurgical validation, independent analytical confirmation, and comprehensive economic evaluation. The upcoming development phase will prioritize independent product analysis, process optimization, metallurgical mass-balance assessments, and evaluation of operating parameters for scale-up. The company is also engaging marketing partners to establish pricing, payability, and offtake terms. A notable risk for Amigo is that preliminary grades may not be reproducible at scale, and osmium and iridium possess specialized industrial markets with limited liquidity compared to more commonly traded precious metals.
