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South Africa
Bokoni Mine

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 Location:
63km SE from Polokwane, South Africa

  Address:
29 Impala Road Chislehurston
PO Box 786136
Sandton
South Africa
2196
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StatusCare and Maintenance
Mine TypeUnderground
Commodities
  • 4E (Pt, Pd, Rh, Au)
Mining Method
  • Conventional narrow-reef mining
Production Start...
Mine Life22 years (as of Jan 1, 2016)
Home to the second-largest PGM resource in South Africa, Bokoni Mine has operated since 1969 but was placed on care and maintenance in October 2017 due to adverse market conditions.

African Rainbow envisage development capital of around R5.3 billion (in real 2021 terms) over three years to ramp the mine up to steady-state production of some 300 000 ounces of 6E PGM and 255 000 tonnes of chromite concentrate per annum from 2028.

A definitive feasibility study will be completed in the second half of F2023, enabling mining operations to begin in the latter half of the 2023 calendar year, pending the required mining approvals.


Owners

Source: p. 46,65
CompanyInterestOwnership
African Rainbow Minerals Ltd. 100 % Indirect
The acquisition of Bokoni Platinum Mine was completed on 12 August 2022. The purchase consideration of R3.5 billion was fully settled in early September 2022.

Contractors

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Deposit Type


Summary:

The Bokoni Mine is an operating mine located on the North-Eastern Limb of the Bushveld Igneous Complex (BIC). The platiniferous horizons of economic significance occur within the Merensky and the UG2 horizons. PGM mineralization is specifically located within the Merensky horizon and the UG2 horizon, which forms part of the Upper Critical zone of the Rustenburg Layered Suite.

The mining area is located within the Zeekoegat, Middelpunt, Umkoanesstad, Brakfontein and Klipfontein farms. The north-eastern portion of the mining area is located below a range of pyroxenite hills while the south-western portion of the mining area is below the valley floor and overlain by black turf.

Both horizons subcrop and in some instances outcrop in the project area along a 16.5 km strike length. The BIC layering dips from northeast to southwest at approximately 25° in the north-western areas (Zeekoegat), and gradually decreases to approximately 18° in the south-eastern area (Brakfontein). The general structural geology is characterized by northeast and east trending dykes and faults with associated conjugated joint sets.

The Merensky is a feldspathic pyroxenite reef horizon and is stratigraphically situated 350 m above the UG2 and is near the top of the Upper Critical Zone. The Merensky is located below the three to six meter thick Merensky Pyroxenite layer and above the Merensky Norite layers. Two thin chromite stringers are discontinuously developed with the u ........


Mining Methods

  • Conventional narrow-reef mining


Summary:

Mining infrastructure includes two decline production shafts: Brakfontein for the extraction of Merensky ore and Middelpunt Hill for extracting UG2 ore. African Rainbow will consider using both existing shafts and plant infrastructure while investing in new infrastructure as part of our business plan to mechanise Bokoni. The new mine plan will focus on exploiting the UG2 resource with mechanised mining, where practical and sustainable, in new mining areas and target mainly on-reef development.

The mining operation consists of a vertical shaft and three decline shaft systems to access underground mine development on the Merensky a nd UG2 reef horizons. The Bokoni Mine has installed road, water and power infrastructure, as well as two processing concentrators, sufficient to meet its operational requirements up to completion of its first phase growth plans to reach 160 ktpm. The Bokoni Mine has an extensive shallow ore body, capable of supporting a life-of-mine plan that is estimated to exceed 22 years (as Bokoni’s mining license expires in 2038). Current mining operations are being conducted at shallow depths, on average 300m below surface. This benefits the Bokoni Mine’s operations in that there are no major refrigeration (and consequent power) requirements at shallower mining depths.

The older Vertical and UM2 shafts made use of conventional mining methods for narrow tabular ore bodies. Ore broken in stopes is transported laterally by means of track boun ........


Crushing and Grinding


Processing

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Summary:

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Production:

CommodityUnits2016201520142013
4E (Pt, Pd, Rh, Au) oz 159,241190,740194,036170,295
All production numbers are expressed as metal in concentrate.

Operational Metrics:

Metrics2016201520142013
Ore tonnes mined 1,294,503 t1,681,656 t1,745,245 t1,524,491 t
Tonnes milled 1,317,668 t1,676,694 t1,743,781 t1,525,945 t

Reserves at December 31, 2016:

CategoryTonnage CommodityGradeContained Metal
Measured & Indicated 436.08 Mt 4E (Pt, Pd, Rh, Au) 5.94 g/t 83.3 M oz
Inferred 374.6 Mt 4E (Pt, Pd, Rh, Au) 5.8 g/t 69.88 M oz

Commodity Production Costs:

CommodityUnits20162015
Cash costs 4E (Pt, Pd, Rh, Au) ZAR 12,311 / oz   11,630 / oz  

Operating Costs:

Units20162015
Total operating costs ($/t milled) ZAR 1,4881,323

Financials:

Units2016
Capital expenditures M CAD 25.2  
Revenue M CAD 162.7  
Pre-tax Income M CAD -37.9  
EBITDA M CAD -15.1  



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 28, 2022
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Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2016
Subscription required Subscription required Subscription required 2015
Subscription required Subscription required Subscription required 2014
Subscription required Subscription required Subscription required 2013

Corporate Filings & Presentations:

DocumentYear
Integrated Report 2022
Financial Review 2018
Management Discussion & Analysis 2018
Annual Information Form 2016
Financial Review 2016
Management Discussion & Analysis 2016
Financial Review 2015
Management Discussion & Analysis 2014
Technical Report 2013
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