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Zimbabwe
Mimosa Mine

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 Location:
130 km E from Bulawayo, Zimbabwe

  Address:
Dadaya Road Private Bag 638
Zvishavane
Zimbabwe
Phone  ...  Subscription required
Fax+263-54-229131
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Platinum
  • Palladium
  • Rhodium
  • Gold
  • Nickel
  • Copper
Mining Method
  • Bord-and-pillar
Production Start...
Mine Life22 years (as of Jan 1, 2022)


Owners

Source: p. 5
CompanyInterestOwnership
Sibanye-Stillwater Ltd. 50 % Indirect
Impala Platinum Holdings Ltd. 50 % Indirect
Mimosa Mining Company (PVT) Ltd. (operator) 100 % Direct
Ownership Tree
Mimosa Mining Company is jointly owned by Impala Platinum and Sibanye-Stillwater on a 50:50 shareholding, following the conclusion of a deal on 12 April 2016, which resulted in Sibanye-Stillwater acquiring all the shares formerly belonging to Aquarius (Pvt) Ltd. The operation is managed by Impala Platinum.

Contractors

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Deposit Type

  • Magmatic


Summary:

PGM mineralisation at Mimosa is located in four erosionally isolated and fault-bounded blocks, namely, from north to south, the North Hill orebody, South Hill orebody, Mtshingwe Fault Block orebody and Far South Hill orebody areas. Each of these blocks is host to a pyroxenite layer known as the P1 pyroxenite layer which is overlain by a layer of gabbro. The platinum-bearing Main Sulphide Zone (MSZ) is located in the P1 pyroxenite some 10m below the ultramafic/mafic contact. The MSZ is a continuous layer, 2m to 6m thick, and forms an elongated basin. The zone strikes in a north-northeasterly trend and dips at about 14° on the margins flattening towards the axis of the basin. The MSZ at Mimosa has a well-defined grade profile where peak base metal and PGM values are offset vertically, with palladium dominant towards the base, platinum in the center and nickel towards the top. At Mimosa the MSZ is visually identified using pyroxene and sulphide mineralisation followed by confirmatory channel sampling and underground XRF channel definition. Minor faults and dykes are present at Mimosa. Although no potholes have been identified, low-grade areas and areas of no mineralisation, or ‘washouts’, have been intersected. These are all accounted for in the Mineral Resource and Mineral Reserve estimate.


Mining Methods

  • Bord-and-pillar


Summary:

Mimosa is a shallow underground mine accessed by the two decline shafts, Wedza Decline and Blore Shaft. Mechanised bord and pillar mining method is used to extract ore over average stoping width of 2.1m. Historically, the bord widths have varied from 15m to 6m wide, depending on the ground control district. Minimum pillar sizes are dependent on depth to give a safety factor greater than 1.6. Current mining consists of 5.5m to 7m bord sizes with 8m by 4m pillars for the entire mine.

The mining cycle involves mechanised support drilling and installation, MSZ channel definition and marking, mechanised face drilling, charging and blasting, followed by mechanised lashing onto a conveyor network feeding to an underground bunker. The ore is conveyed to a surface stockpile ahead of feeding into the processing plant from the bunker. Optimum stoping widths and mining cut selection are regularly reviewed. The currently planned mining horizon is a 2.1m slice defined by the hangingwall at 0.60m above and the footwall at 1.5m below the Platinum peak. This overbreaks to an actual mining width average of 2.14m.


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits2022202120202019201820172016
6E (Pt,Pd,Rh,Au,Ir,Ru) koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required266259254
Platinum koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Palladium koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Rhodium koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Nickel t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in concentrate. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required2,814 kt2,802 kt2,729 kt
Annual milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at June 30, 2022:

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 60.8 Mt Platinum 3.34 M oz
Proven & Probable 60.8 Mt Palladium 2.6 M oz
Proven & Probable 60.8 Mt Rhodium 0.28 M oz
Proven & Probable 60.8 Mt Gold 0.28 M oz
Proven & Probable 60.8 Mt 4E (Pt, Pd, Rh, Au) 3.47 g/t 6.4 M oz
Proven & Probable 60.8 Mt 6E (Pt,Pd,Rh,Au,Ir,Ru) 3.69 g/t 7.2 M oz
Total Resource 127 Mt Platinum 6.98 M oz
Total Resource 127 Mt Palladium 5.44 M oz
Total Resource 127 Mt Rhodium 0.62 M oz
Total Resource 127 Mt Gold 1.18 M oz
Total Resource 127 Mt 4E (Pt, Pd, Rh, Au) 3.49 g/t 14.2 M oz
Total Resource 127 Mt 6E (Pt,Pd,Rh,Au,Ir,Ru) 3.71 g/t 15.2 M oz

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
Cash costs 6E (Pt,Pd,Rh,Au,Ir,Ru) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 716 / oz   710 / oz   690 / oz  
Cash costs Platinum USD  ......  Subscription required  ......  Subscription required 1,521 / oz   1,511 / oz   1,463 / oz  
Cash costs Platinum USD  ......  Subscription required† -13 / oz†   335 / oz†   486 / oz†  
All-in sustaining costs (sold) Platinum USD  ......  Subscription required† 626 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2021202020192018201720162015
Total operating costs ($/t milled) USD 76707168676669

Financials:

Units2023202220212020201920182017
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 44   33  
Revenue M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 3,880  ZAR 3,524  ZAR
Gross profit M  ......  Subscription required  ......  Subscription required  ......  Subscription required 751  ZAR 183  ZAR
Pre-tax Income M 495  ZAR
After-tax Income M  ......  Subscription required  ......  Subscription required 397  ZAR 393  ZAR
EBITDA M  ......  Subscription required
Book Value M  ......  Subscription required
Subscription required - Subscription is required


Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 24, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 24, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 24, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 24, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 24, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required 2022
Subscription required 2021
Subscription required Subscription required Subscription required 2020
Subscription required Subscription required Subscription required 2019
Subscription required Subscription required Subscription required 2018
Subscription required Subscription required 2017
Subscription required Subscription required Subscription required 2016
Subscription required Subscription required Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
Integrated Report 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Integrated Report 2018
Year-end Mineral Reserves 2018
Year-end Mineral Reserves 2018
Integrated Report 2017
Other 2017
Fact Sheet 2016
Fact Sheet 2010
Other 2008
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