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South Africa
Impala Mine

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 Location:
10 km N from Rustenburg, South Africa

  Address:
PO Box 5683
Rustenburg
South Africa
0300
Phone  ...  Subscription required
Fax+27-(14)-569-6548
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
  • Nickel
  • Copper
Mining Method
  • Breast mining
  • Bord-and-pillar
Processing
  • Pyrometallurgical plant / circuit
  • Flotation
Mine Life15 years (as of Jan 1, 2020)
This operation comprises a 10-shaft mining complex and concentrating and smelting plants.


Owners

Source: p. 6
CompanyInterestOwnership
Impala Platinum Holdings Ltd. 96 % Indirect
Impala operation is 96% owned by Impala Platinum Holdings Ltd. The remaining 4% is owned by Employee share ownership trust.

Deposit Type

  • Magmatic


Summary:

The Merensky and UG2 Reefs are separated by a sequence of mostly anorthositic and noritic layered units from 45m in the northern part of the lease area and thickens to 125m in the southern part of the lease area. Both the Merensky and UG2 Reefs are exploited at Impala. The Merensky Reef is generally composed of an upper feldspathic pyroxenite, overlying a thin basal chromitite stringer, followed by an anorthosite to norite footwall. Locally this is termed a ‘pyroxenite reef’. Occasionally a pegmatoidal pyroxenite and a second chromitite stringer may be developed between the feldspathic pyroxenite and the footwall units. This is termed a ‘pegmatoid reef’. As an aid to mining operations the Merensky Reef is further defined as being ‘A’, ‘B’, ‘C’ or ‘H’ Reef where it rests on specific footwall units – locally called Footwall 1, 2 and 3, respectively.

The UG2 Reef is defined as a main chromitite layer, with most of the PGM and base metal mineralisation confined to this unit, followed by a poorly mineralised pegmatoidal pyroxenite footwall. The hangingwall to the main chromitite layer is a feldspathic pyroxenite containing up to four thin, poorly mineralised chromitite layers. The vertical grade distribution is depicted in the accompanying graphs, notably showing peak values at reef contacts in association with chromitite. The average 6E metal ratios show the distinct differences between the Merensky and UG2 Reefs, in particular the higher Pt:Pd ratio associated with the Merensky Reef and the relative high proportion of rhodium in the UG2 Reef, as shown below.

Both mineralised horizons dip gently away from the sub-outcrop in a north-easterly direction at 10° to 12°. The reefs may be disrupted by minor and major faults, lamprophyre, syenite and dolerite dykes, late stage ultramafi c replacement pegmatoid bodies and potholes. The latter features are generally circular in shape and represent ‘erosion’ or ‘slumping’ into the footwall units. They vary in size from a few metres to tens of metres across and up to tens of metres in depth. All of these features are accounted for in the Mineral Resource and Mineral Reserve estimates as geological losses and they contribute to dilution or absence of the mineralised horizons.


Mining Methods

  • Breast mining
  • Bord-and-pillar


Summary:

The Merensky and UG2 Reefs are mined concurrently at Impala. Stoping at the operations is carried out through conventional double-sided breast mining in accordance with Impala’s best practice principles. The access haulages are developed in opposite directions from cross-cuts connected to a central shaft position, following the two reef horizons on strike in the footwall of the reefs and are defined as half levels. Footwall drives are developed at approximately 18m to 30m below the reef horizon with on-reef raise/winze connections being between 180m and 250m apart. Panel face lengths vary from 15m to 28m for both Merensky and UG2 Reefs, with panels being typically separated by 6m x 3m grid pillars with 2m ventilation holes. Stoping widths are approximately 1.4m and 1.1m for conventional Merensky and UG2 Reefs, respectively, depending on the width of the economical reef horizon. Mechanised (trackless) bord and pillar mining occurs in selected Merensky Reef areas at 14 Shaft. The average stoping width of the mechanised panels is about 1.9m.


Crushing and Grinding


Processing

  • Pyrometallurgical plant / circuit
  • Flotation

Source: Subscription required

Summary:

Processing receives ore from the shafts which is allocated to either the UG2 Plant, for the higher chromium grade material, or the Central Concentrator for Merensky ore. Between 89% and 91% of the PGMs from the Merensky ore are recovered at mass pulls ranging from 5% to 7% utilising 10 primary mills, feeding two, nine stage, tank cell fl otation banks. Tailings from this section are milled for further liberation and fl oated in conventional cells to achieve the aforementioned recovery.

Approximately 79% to 81% of the PGMs are recovered from the UG2 ore at a mass pull of 2% to 3%. The PGM recovery from UG2 ore is performed utilising a more complex circuit configuration in order to reduce the amount of chromium reporting to the concentrate stream. The MF2 plant, also situated at the Central Concentrator, utilises three primary mills that can accommodate any Merensky ore spill over, as well as UG2 ore. This allows for fl exibility in the ore split received from the mining oper ........

Recoveries & Grades:

CommodityParameter202020192018201720162015201420132012
6E (Pt,Pd,Rh,Au,Ir,Ru) Head Grade, g/t 3.913.994.094.064.164.194.344.324.38

Production:

CommodityUnits202020192018201720162015
6E (Pt,Pd,Rh,Au,Ir,Ru) koz  ......  Subscription required  ......  Subscription required  ......  Subscription required1,2471,2201,137
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 t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202020192018201720162015
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required10,316 kt9,199 kt
Subscription required - Subscription is required.

Reserves at June 30, 2020:

CategoryTonnage CommodityGradeContained Metal
Proven & Probable 117.5 Mt Platinum 8.2 M oz
Proven & Probable 117.5 Mt Palladium 4 M oz
Proven & Probable 117.5 Mt 4E (Pt, Pd, Rh, Au) 3.6 g/t 13.6 M oz
Proven & Probable 117.5 Mt 6E (Pt,Pd,Rh,Au,Ir,Ru) 4.15 g/t 15.7 M oz
Total Resource 427.3 Mt 4E (Pt, Pd, Rh, Au) 5.93 g/t 81.5 M oz
Total Resource 427.3 Mt 6E (Pt,Pd,Rh,Au,Ir,Ru) 6.84 g/t 93.9 M oz
Total Resource 427.3 Mt Nickel 0.1 %
Total Resource 427.3 Mt Platinum 49.3 M oz
Total Resource 427.3 Mt Palladium 24 M oz
Total Resource 427.3 Mt Copper 0.04 %

Commodity Production Costs:

CommodityUnits20202019201820172016
Cash costs 6E (Pt,Pd,Rh,Au,Ir,Ru) USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 906 / oz 789 / oz
Cash costs Platinum USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,726 / oz 1,535 / oz
Cash costs Platinum USD  ......  Subscription required†  ......  Subscription required† 1,060 / oz† 967 / oz†
All-in sustaining costs (sold) Platinum USD  ......  Subscription required†  ......  Subscription required†
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units20202019201820172016201520142013
Total operating costs ($/t milled) USD 11110711211293131141127

Financials:

Units20202019201820172016201520142013
Capital expenditures (planned) M ZAR
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 267   275   500  
Revenue M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 13,369  ZAR 10,327  ZAR 14,588  ZAR
Gross profit M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -1,455  ZAR -1,902  ZAR 2,097  ZAR
Pre-tax Income M  ......  Subscription required  ......  Subscription required  ......  Subscription required
After-tax Income M  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -2,976  ZAR
EBITDA M  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 23, 2020
....................... Subscription required ....................... Subscription required Subscription required Nov 23, 2020
....................... Subscription required ....................... Subscription required Subscription required Nov 23, 2020
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
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 Subscription required 2017
Subscription required Subscription required Subscription required 2016
Subscription required Subscription required Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
Integrated Report 2017
Annual Report 2016
Fact Sheet 2016
Year-end Mineral Reserves 2016
Other 2010
Project Description 2009
Project Description 2006
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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