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South Africa
Modikwa Mine

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 Location:
107 km SE from Polokwane, South Africa

  Regional Office:
ARM house 29 Impala Road Chislehurston Sandton
Johannesburg
South Africa
2196
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Fax+27-(0)-11-779-1312
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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
  • Ruthenium
  • Iridium
  • Nickel
  • Copper
  • 4E (Pt, Pd, Rh, Au)
  • 6E (Pt,Pd,Rh,Au,Ir,Ru)
Mining Method
  • Breast stoping with strike pillars
Processing
  • Flotation
Mine Life30 years (as of Jan 1, 2020)
Completion of construction and commissioning of the chrome plant is expected in the fourth quarter of F2021.


Owners

Source: p. 64
CompanyInterestOwnership
African Rainbow Minerals Ltd. 41.5 % Indirect
Anglo American plc. 50 % Indirect
Ownership Tree
ARM’s effective stake in Modikwa is 41.5%, through its 83% ownership of the ARM Mining Consortium. 8.5% is held by local communities and 50% by Anglo American Platinum.
Jointly managed by ARM and Anglo American Platinum.

Deposit Type

  • Magmatic


Summary:

The Bushveld layered sequence around Modikwa strikes northnorthwest to south-southeast and dips to the southwest at 10º to 12º, with local variations in the dip resulting in gradients of nearly 20º. There are several instances where some gentle ‘rolling’ of the reef horizons have been recorded, and normally steeper dips are noted nearer the outcrop (as opposed to at depth).

The outcrop positions of the Merensky Reef and the UG2 normally occur within the areas of low relief, and much of the outcrop is masked by extensive development of black turf, as well as, in places, transported sediments. On the farms Maandagshoek 254 KT, Onverwacht 292 KT and Winterveld 293 KT; however, the UG2 (and occasionally the Merensky Reef) outcrops in a series of elongated hills. Although frequently covered with scree material, much of this outcrop has been marked by a series of trenches and pits, many of which date from early pioneer prospecting.

Both the UG2 and Merensky Reefs are present at Modikwa. The UG2 occurs as a chromitite layer with an average thickness of approximately 60 centimetres. Three leader chromitites occur above the main seam. Gentle undulations of the UG2 with amplitudes of less than 2 metres are developed across the mine area. Potholes are randomly distributed within the North Shaft area but are less abundant in the South Shaft area. The Onverwacht Hill area in the southern portion of the mine is characterised by the presence of several large ultramafic pegmatoid intrusions that disrupt, and locally replace, the UG2.


Mining Methods

  • Breast stoping with strike pillars


Summary:

Mining consists of mechanised development and conventional stoping. The UG2 is accessed via two primary declines from the surface, and South 2 shaft. Run-of-mine tonnage is processed at the Modikwa concentrator and the PGE-rich concentrate is transported to Anglo Platinum’s Polokwane smelter and refining facilities.


Crushing and Grinding


Processing

  • Flotation

Source: Subscription required

Summary:

Froth flotation is the primary mineral processing separation step employed in the beneficiation of PGM ore bodies. Anglo Platinum operates a significant portion of the total installed flotation capacity in the PGM industry, which is installed at 20 operating plants across the Bushveld.

Anglo Platinum has 20 operating concentrators sited around the Eastern, Northern and Western limbs of the Bushveld complex. The concentrators treat mainly Merensky and UG-2 ores, with Potgietersrust (PPL, Sandsloot) and PPRust North being the only two plants designed to treat the Platreef ore.

For typical UG2 ores, for example, the finer natural PGM grain size in the in situ ore and the relative performance of PGM flotation plants indicate that the ‘watershed’ size where flotation drops off significantly must be relatively fine. This is indicated in, where data collected from a UG2 concentrator illustrate the relative recovery by size fraction in the mainstream roughers and scaven ........

Recoveries & Grades:

CommodityParameter202020192018201720162015
6E (Pt,Pd,Rh,Au,Ir,Ru) Head Grade, g/t  ......  Subscription required  ......  Subscription required  ......  Subscription required5.435.275.17

Production:

CommodityUnits2021202020192018201720162015
6E (Pt,Pd,Rh,Au,Ir,Ru) oz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required333,888301,228293,604260,037
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Platinum oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Palladium oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Rhodium oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Ruthenium oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Iridium oz  ......  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
Copper t  ......  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:

Metrics202020192018201720162015
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required2.05 Mt2.08 Mt1.86 Mt
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required2.01 Mt2.05 Mt1.86 Mt
Subscription required - Subscription is required.

Reserves at June 30, 2020:

CategoryTonnage CommodityGradeContained Metal
Proven 13.43 Mt 4E (Pt, Pd, Rh, Au) 4.45 g/t 1.92 M oz
Probable 32.3 Mt 4E (Pt, Pd, Rh, Au) 4.12 g/t 4.28 M oz
Proven & Probable 45.73 Mt 4E (Pt, Pd, Rh, Au) 4.22 g/t 6.21 M oz
Measured & Indicated 188 Mt 4E (Pt, Pd, Rh, Au) 5.92 g/t 35.8 M oz
Inferred 77.5 Mt 4E (Pt, Pd, Rh, Au) 6.22 g/t 15.5 M oz

Commodity Production Costs:

CommodityUnits202020192018201720162015
Cash costs 6E (Pt,Pd,Rh,Au,Ir,Ru) ZAR  ......  Subscription required  ......  Subscription required 9,197 / oz 8,463 / oz 8,244 / oz 8,481 / oz
Cash costs Platinum ZAR  ......  Subscription required  ......  Subscription required 23,311 / oz 21,878 / oz 21,271 / oz 21,924 / oz
Subscription required - Subscription is required.

Operating Costs:

Units20202019201820172016201520142013
Total operating costs ($/t milled) ZAR 1,5981,3451,2651,2651,1821,1871,010876

Financials:

Units2020201920182017201620152014
Capital expenditures M ZAR  ......  Subscription required  ......  Subscription required266  262   282   646   570  
Revenue M ZAR  ......  Subscription required  ......  Subscription required3,592  2,513   2,409   2,164   2,457  
Operating Income M ZAR  ......  Subscription required  ......  Subscription required521  -36   -11   -41   332  
Subscription required - Subscription is required


Heavy Mobile Equipment:

Mine Management:

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

Staff:

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

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2017
Annual Report 2017
Year-end Mineral Reserves 2017
Year-end Mineral Reserves 2017
Annual Report 2016
Annual Report 2016
Financial Review 2016
Year-end Mineral Reserves 2016
Annual Report 2015
Integrated Report 2015
Year-end Mineral Reserves 2015
Other 2007
Other 2000
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Aerial view:

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