Mimosa is a shallow underground PGM and base metal mining and processing operation located on the Great Dyke of Zimbabwe, 32km west of the town of Zvishavane, approximately 340 km southwest of Harare, the capital of Zimbabwe.
On a 50% attributable basis, as at 31 December 2020 Mimosa has 1.5 million oz of 4E PGM mineral reserves and 6.2 million oz of 4E PGM mineral resources.
At Mimosa, focus is being given to developing the Mtshingwe Shaft and further evaluating the Mtshingwe Block, extending the life of mine, stabilizing production profiles at current performance levels and fast-tracking the conversion of mineral resources to mineral reserves.
Mimosa Mining Company is operated by Impala Platinum and jointly owned by Sibanye-Stillwater on a 50:50 shareholding following the conclusion of a US$4.3 billion all-cash offer on April 12, 2016, which resulted in Sibanye-Stillwater acquiring all the shares formerly belonging to Aquarius Platinum.
Mimosa is a shallow, underground mining operation located in the Wedza sub-chamber of the Great Dyke of Zimbabwe. The Wedza sub-chamber is the southernmost of four chambers of the Great Dyke, hosting the economic main sulphide zone from which the PGM and base metals are mined. The orebody is accessed via two shafts, the Wedza shaft and the Mtshingwe Shaft. The Wedza Shaft has been extensively mined; the Mtshingwe Shaft is at the developmental stage.
Mining takes place less than 200 m below surface, utilising the bord-and-pillar mining method. Ore is processed at a concentrator located on site, at the rate of approximately 227,000 tonnes per month; concentrates are trucked to South Africa for smelting and refining at Impala Platinum facilities. Tailings are disposed of at a storage facility on site.
The Mimosa Mining Company holds a mining lease over an area of 6,594 ha and related exclusive mining rights therein for nickel, copper, cobalt, gold, silica, chromite and PGMs.