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Overview

Mimosa is jointly owned by Implats and Sibanye in terms of a 50:50 shareholding. A deal concluded on 12 April 2016 resulted in Sibanye acquiring Aquarius's 50% stake in Mimosa.


Mine location

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 340km south-west of Harare, the capital city of Zimbabwe, in the Midlands province. The Wedza sub-chamber is the southernmost of four sub-chambers on the Great Dyke, hosting the economic Main Sulphide Zone (MSZ) from which PGMs and base metals are mined.

An ongoing underground operation on the South Hill ore deposit, Mimosa has two shafts, the Wedza and Mtshingwe shafts. The Wedza shaft is on the northern part of South Hill and has been extensively mined while the Mtshingwe shaft is at development stage.

Mimosa has two mineralised zones: the economical MSZ, which is a 6m wide mineralised zone and has a platinum peak 5-20m below the mafic ultramafic contact in the gradational zone between the hanging wall websterite and the footwall bronzitite. It is consistent in terms of continuity but sometimes interrupted by faults, pegmatoids and dykes.

Key statistics

  2016
OPERATIONAL RESULTS    
Ore milled (underground) Mt 1.0
Plant head grade g/t 3.57
Recoveries % 78.5
4E PGM produced 000oz 91,076
4E PGM sold kg 2,833
Revenue R/kg 431,768
Average PGM (4E) basket price R/oz 12,206
  US$/oz 831
COSTS AND MARGINS    
Operating cost $/t 65
  R/t 958
  $/4Eoz 725
  R/4Eoz 10,639
Operating profit Rm 254.2
Operating margin % 21
Capital expenditure – total Rm 159.8
Exchange rate – average R/US$ 14.68

Infrastructure

Hoisting and production capacities

Shaft zoneOperational
shaft
5yr 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 185 220 78.2 UG

Performance in 2016*

Total operation

Underground volumes mined were 320,594m² at a yield of 3.57g/t. Tonnes milled were 2,024Mt which produced 182,151oz 4E PGM (only 50% attributable to Sibanye). Operating cost was R969 million, generating operating profit of R254.2 million (before amortisation and depreciation). Total capital expenditure was R159.8 million with a net operating profit of R30.5 million (after amortisation and depreciation).

* Mimosa reports in US dollars and for the full financial year