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MIMOSA’s 6E concentrate production declined 7% year-on-year to 59,000 ounces in the first quarter of the 2027 financial year, as intermittent power disruptions, scheduled maintenance and increasingly complex ore affected performance at the Zimbabwean platinum mine, Mining Zimbabwe can report.
By Rudairo Mapuranga
According to Impala Platinum Holdings’ (Implats) first-quarter production report for the three months ended 30 September 2026, released on 29 October, tonnes milled at Mimosa fell 5.8% to 698,000 tonnes from 741,000 tonnes in the corresponding period last year.
Milled grade also declined 7.7% to 3.33 grammes per tonne (g/t), compared with 3.61 g/t in the prior-year quarter, reflecting increased throughput of more geologically complex ore as mining progressed towards the extremities of the current underground mining footprint.
Implats said intermittent regional power interruptions and technical difficulties associated with the complex geology affected operational performance, while scheduled concentrator maintenance early in the quarter further disrupted production.
Improved concentrator recoveries partially offset the impact of lower throughput and grade, limiting the decline in 6E concentrate production to 6.7%, from 63,000 ounces in the comparative quarter.
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The latest performance follows a weaker FY2026, during which Mimosa’s 6E concentrate production declined 6% to 239,000 ounces from 254,000 ounces in FY2025, as lower throughput, complex ore mineralogy and processing challenges weighed on output.
Despite the subdued start to FY2027, Implats expects Mimosa to produce between 220,000 and 240,000 ounces of 6E concentrate during the full financial year.
The company has budgeted capital expenditure of between US$45 million and US$65 million for the operation, mainly towards sustaining investment.
Implats said it would continue assessing future life-of-mine extension options at Mimosa during the financial year as it seeks to sustain production beyond the current underground mining footprint.
Mimosa is jointly owned by Implats and Sibanye-Stillwater, each holding a 50% stake, and remains an important contributor to Zimbabwe’s platinum group metals sector.