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This page is under review. For the latest information, please refer to our Integrated Annual Report 2018, released on 29 March 2019.


Mimosa Mining Company is jointly owned by Impala Platinum and Sibanye-Stillwater on a 50:50 shareholding, following conclusion of a deal on 12 April 2016 which resulted in Sibanye-Stillwater acquiring all the shares formerly belonging to Aquarius (Pvt) Ltd.

Mimosa is a 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 southwest of Harare, the capital city of Zimbabwe. The Wedza sub-chamber is the southernmost of four sub-chambers on the Great Dyke, hosting the economic MSZ from which PGMs and base metals are mined.

Mimosa is an ongoing underground operation on the South Hill ore deposit consisting of two shafts, namely the Wedza Shaft and the Mtshingwe Shaft. The Wedza Shaft, on the northern part of South Hill, has been extensively mined while Mtshingwe Shaft is at the development stage. There are two mineralised zones at Mimosa of which only the MSZ is economical

In 2017, attributable 4E PGM production at Mimosa increased by 36% to 124,153oz.

Locality plan

Mine location

Key statistics

Production (attributable)
Ore milled000t1,385 1,012
– Underground 000t1,385 1,012
– Surface000t
Plant head grade g/t3.58 3.57
– Underground g/t3.58 3.57
– Surfaceg/t
Plant recoveries%77.87 78.44
– Underground %77.87 78.44
– Surface%
Yieldg/t2.79 2.80
– Underground 2.79 2.80
– Surface
PGM production (4E – 2E)000oz124 91.1
– Underground 124 91.1
– Surface
PGM sales (4E – 2E)000oz124 91.1
Price and costs
Average PGM basket price receivedR/oz12,572 12,206
US$/oz938953 832
Adjusted EBITDA margin%31 37
All-in sustaining costR/oz9,781 11,222
US$/oz735 765
All-in costR/oz9,781 11,222
US$/oz735 765
Capital expenditure
Sustaining capital Rm223 159.8


Hoisting and production capacities

Mining unitOperational shaft5-year planned production (ktpm)Operating capacity (ktpm)
South Hill Wedza 220 240

Plant capacities

PlantDesign capacity (ktpm)Current operational capacity (ktpm)Average recovery factor (%)Material treated
Mimosa 185 227 78.2 MSZ