Mimosa is a shallow, mechanised PGM and base metal mining operation located in the Wedza sub-chamber of the Great Dyke of Zimbabwe, some 32km west of Zvishavane, a major mining centre situated 340km south-west of Harare, the capital city of Zimbabwe.
Statistics as at 31 December 2025
Life of mine
![Calendar [icon]](https://www.sibanyestillwater.com/wp-content/uploads/2020/04/icon-pgm-lom.svg){kind=icon}
2033
![Platinum ingots [icon]](https://www.sibanyestillwater.com/wp-content/uploads/2020/04/icon-pgm-production-1.svg){kind=icon}
Production 4E PGM
117,019oz
![Gold dollars [icon]](https://www.sibanyestillwater.com/wp-content/uploads/2020/04/icon-gold-costs.svg){kind=icon}
All-in sustaining cost
US$1,280/4Eoz
Jointly owned
50/50
with Implats
For up-to-date quarterly production figures, please refer to the latest results booklet.
The Mimosa operation has four mineralised areas: North Hill, South Hill, Far South Hill and the Mtshingwe Block. The Mimosa mine is a mechanised underground operation on the South Hill ore deposit, consisting of two decline shafts, namely the Wedza shaft and the Blore shaft.
As at 31 December 2025 and on a 50% attributable basis, Mimosa had 4E PGM Mineral Reserves of 1.4Moz and 4E PGM Mineral Resources of 6.6Moz.
A closer look
Mimosa is an established mechanised, bord and pillar mining operation, with all the facilities and equipment to mine and produce precious and base metals concentrate.
There are two decline shafts, and a small vertical shaft at 26 Level South which is equipped for hoisting people to surface in case of an emergency. Underground infrastructure includes an ore bunker, main and satellite workshops, pump stations, strike and dip conveyors as well as the main conveyor in Blore shaft. Blore shaft has an operational capacity of 280ktpm. A fleet of trackless mining machinery (TMM) to enable the mechanised bord-and-pillar operation.
The fleet of TMM equipment is serviced and repaired in the main underground workshop, which is adequately equipped for the purpose. Surface Infrastructure includes an ore stockpile, concentrator plant, garage, workshops, dirty water settling ponds, service and potable water storage tanks, a clinic and housing for selected essential staff.
The Mimosa concentrator has an operational capacity of ~233 ktpm. Concentrates are transported by road to South Africa for smelting and refining at the Impala Platinum facilities.
The Mimosa mining right covers an area of 65.94km². The mining lease, Lease No 24, was granted to Mimosa Mines (Pvt) Ltd on 5 September 1996, giving it the exclusive mining rights for PGMs and base metals within the vertical limits of its boundary. As per Zimbabwean law, the mining right does not expire so long as annual renewal fees are up to date. In addition, Mimosa holds the 3.70km² South Ridge mining claims to the South.
Mimosa has completed the construction of TSF4, which is now operational. The TSF4 was designed with the capacity to handle the Mimosa LoM. It provides an additional 55Mt, a surplus capacity of 31Mt.
Mimosa has completed the construction of TSF4, which is now operational. The TSF4 was designed with the capacity to handle the Mimosa LoM. It provides an additional 55Mt, a surplus capacity of 31Mt.
Mimosa has completed a bankable feasibility study with DRA on an additional, adjacent ore body known as North Hill, which is for the establishing and developing of an additional decline shaft, related surface infrastructure as well as conveyor to the plant. It would extend the LoM for a further 10-15 years.
As of date, the JV partners have not agreed to the funding and development of North Hill, and it remains a strategic development option. As such, it also does not form a part of the reported Mineral Reserves.
