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Zimbabwe
Unki Mine

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 Location:
34 km SE from Gweru, Zimbabwe

  Regional Office:
144 Oxford Road Rosebank Melrose 2196 Marshalltown
PO Box 62179
Johannesburg
South Africa
2107
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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
  • PGM
  • Gold
  • Platinum
  • Palladium
  • Rhodium
  • Nickel
  • Copper
  • Iridium
  • Ruthenium
Mining Method
  • Bord-and-pillar
Production Start...
Mine Life20 years (as of Jan 1, 2022)
Unki – one of the world’s largest PGM deposits outside of South Africa, on the Great Dyke in Zimbabwe.

There are currently no major technical studies underway at Unki. However, workstreams including drilling programmes will commence in 2023 to explore the economic potential of open-cast mining areas.


Owners

Source: p. 97,270,271
CompanyInterestOwnership
Anglo American plc. 79.2 % Indirect
Anglo American Platinum Ltd. (operator) 100 % Direct
Anglo American Platinum Ltd. wholly owns and operates the Unki mine.

Anglo American plc. held through an effective 79.2% interest in Anglo American Platinum Limited.

Contractors

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Deposit Type

  • Magmatic


Summary:

Unki platinum mine is in the southern half of Zimbabwe’s Great Dyke geological formation–widely ecognised as the second-largest resource of PGMs in the world.

The Great Dyke in Zimbabwe occurs as a 2.5 billion-year-old mafic to predominantly ultramafic layered intrusion, over 500km long, trending in a north/north-easterly direction. Unki Mine is located in the Selukwe sub-chamber while the KV and SR claims are in the Wedza sub-chamber of the Great Dyke. The dyke comprises an upper mafic unit of alternating sequences of pyroxenite and dunite-harzburgites and a lower ultramafic dunites, that cut across the dominantly Archaean granite and greenstone belts of the Zimbabwe Craton.

It is synclinal in section with layers dipping and flattening towards the axis of the intrusion, with essentially the same lithological succession being exposed on both sides of the longitudinal axis. The general dip decreases from outcrops to the central area varying from 14° to 0°. The PGM and associated base metal Mineralisation are developed within the uppermost pyroxenite horizon, the Main Sulphide Zone (MSZ).

The MSZ occurs some 10m below the mafic- ultramafic contact and is hosted in the uppermost pyroxenite layer (P1) of the ultramafic sequence. The P1 unit consists of a thin upper unit of websterite and a lower thick unit of plagioclase pyroxenite where the MSZ occurs near the base of the websterite unit. Based on geochemistry, the MSZ has two distinguishable ........


Mining Methods

  • Bord-and-pillar


Summary:

Unki Mine is a mechanised, trackless, bord-and-pillar underground operation. Minimal development is required to prepare for mining. Development is often on-reef and comprises roadways for ore transport and travelling ways for mine personnel. Excavation of roadways is combined with ore production. Mined-out stopes serve as transport routes. Mobile mechanised mining equipment is used at Unki Mine. A twin-decline shaft system provides access to underground workings for employees and material, as well as ore conveyance. Both shafts are now 2,822m from the portal on surface. Currently there are 16 established mining sections with two additional sections planned for 2022. The equipped sections
have strikes belts for transferring ore directly to the main incline shaft conveyor.


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityUnits2023202220212020201920182017
PGM koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required193166
Gold koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Platinum koz  ......  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
Rhodium koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Nickel kt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Iridium koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Ruthenium koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in concentrate. ^ Guidance / Forecast.
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Operational Metrics:

Metrics202220212020201920182017
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required2.1 Mt1.9 Mt
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required2,092 kt1,925 kt1,752 kt
Subscription required - Subscription is required.

Reserves at December 31, 2022:

CategoryTonnage CommodityGradeContained Metal
Proven 28.2 Mt 4E (Pt, Pd, Rh, Au) 3.24 g/t 2.9 M oz
Probable 23 Mt 4E (Pt, Pd, Rh, Au) 3.35 g/t 2.5 M oz
Proven & Probable 51.2 Mt 4E (Pt, Pd, Rh, Au) 3.29 g/t 5.4 M oz
Measured 6.1 Mt 4E (Pt, Pd, Rh, Au) 4.12 g/t 0.8 M oz
Indicated 114.6 Mt 4E (Pt, Pd, Rh, Au) 4.33 g/t 16 M oz
Measured & Indicated 120.8 Mt 4E (Pt, Pd, Rh, Au) 4.32 g/t 16.8 M oz
Inferred 31.8 Mt 4E (Pt, Pd, Rh, Au) 4.04 g/t 4.1 M oz
Total Resource 152.5 Mt 4E (Pt, Pd, Rh, Au) 4.26 g/t 20.9 M oz

Commodity Production Costs:

Commodity202220212020201920182017
Cash costs PGM  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 814 / oz  USD 790 / oz  USD
Cash costs Platinum  ......  Subscription required 1,825 / oz  USD 1,757 / oz  USD
All-in sustaining costs (sold) PGM  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 772 / oz†  USD 644 / oz†  USD
All-in sustaining costs (sold) Platinum  ......  Subscription required†  ......  Subscription required† 616 / oz†  USD 612 / oz†  USD
† Net of By-Product.
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Operating Costs:

Units20222021202020192018201720162015
UG mining costs ($/t milled) ZAR 990969893863811873835
Total operating costs ($/t milled) ZAR  ......  Subscription required
Subscription required - Subscription is required.

Financials:

Units2022202120202019201820172016
Growth Capital M ZAR  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Sustaining costs M ZAR  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 228   181  
Capital expenditures M ZAR  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 152   142   217  
Revenue M ZAR  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 2,884   2,489   2,227  
EBIT M ZAR  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 491   466   -162  
EBITDA M ZAR  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 835   823   264  
Operating Cash Flow M ZAR  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 525   614   61  
Subscription required - Subscription is required



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 23, 2023
....................... Subscription required ....................... Subscription required Subscription required Mar 23, 2023
....................... Subscription required ....................... Subscription required Subscription required Mar 23, 2023
....................... Subscription required ....................... Subscription required Subscription required Mar 23, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2022
Subscription required Subscription required Subscription required 2021
Subscription required 2021
Subscription required Subscription required Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016
Subscription required 2015
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
Annual Result 2022
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 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Year-end Mineral Reserves 2017
Annual Report 2016
Financial Review 2016
Year-end Mineral Reserves 2016
Annual Report 2015
Annual Report 2015
Year-end Mineral Reserves 2015
Other 2014
Other 2012
Other 2010
Other 1993
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