South Africa

Khumani Mine

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Categories

Overview

Mine TypeOpen Pit
Commodities
  • Iron Ore
Mining Method
  • Truck & Shovel / Loader
Production Start... Lock
Mine Life2042
ShapshotThe Khumani is open-pit mechanised mine.

Owners

SourceSource
CompanyInterestOwnership
African Rainbow Minerals Ltd. 50 % Indirect
Assore Ltd. 50 % Indirect
Assmang Proprietary Ltd. (operator) 100 % Direct
African Rainbow Minerals Ltd. owns 50% of Assmang (Pty) Ltd and Assore (Pty) Ltd owns 50%.

Assmang is jointly managed by ARM and Assore. ARM provides the administration and technical services while Assore performs the sales and marketing function.

Contractors

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Deposit type

  • Banded iron formation

Summary:

Khumani mine is situated within a sequence of early Proterozoic sediments of the Transvaal Supergroup. The mine is symmetrically located on the Maremane Anticline in the Griqualand West Sequence of the Transvaal Supergroup, as well as the Elim Group of the Keis Supergroup.

In general, two ore types are present: laminated hematite ore, forming part of the Manganore Iron Formation, and conglomerate ore, belonging to the Doornfontein Conglomerate Member at the base of the Gamagara Formation. The laminated ore types occur in the upper portion of the Manganore Iron Formation as enriched high-grade hematite bodies. The boundaries of high grade hematite orebodies cross-cut primary sedimentary bedding, indicating that secondary hematitisation of the iron formation took place. In all of these, some of the stratigraphic and sedimentological features of the original iron formation are preserved.

The conglomeratic ore found in the Doornfontein Conglomerate Member of the Gamagara Formation, is lenticular but not consistently developed along strike. It consists of stacked, upward fining conglomerate-gritstone-shale sedimentary cycles.

The lowest conglomerates and gritstones tend to be rich in subrounded to rounded hematite ore pebbles and granules and form the largest part of the resource. The amount of iron ore pebbles decreases upwards in the sequence so that upper conglomerates normally consist of poorly sorted, angular to rounded chert and banded iron formation pebbles. Hematite is the predominant ore mineral, but limonite and specularite also occur.

Khumani being characterised by larger stratiform bodies and prominent hanging-wall outcrops. The down-dip portions are well preserved and developed, but in the outcrop the deposits are thin and isolated. Numerous deeper iron ore extensions occur into the basins due to karst development. A prominent north-south strike of the orebodies dipping to the west is notable.

Reserves

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Mining Methods

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Comminution

Crushers and Mills

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Processing

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Production

CommodityUnits2024202320222021202020192018
Iron Ore Mt 00000000000015
All production numbers are expressed as lump & fines. ^ Guidance / Forecast.

Operational metrics

Metrics202320222021202020192018
Ore tonnes mined 00000000000000022 Mt
Stripping / waste ratio 000
Waste 0000000043,505,469 t

Production Costs

CommodityUnits2024202320222021202020192018
Site cash costs (produced) Iron Ore ZAR 000 000 000 000 000 227 / t   207 / t  
^ Guidance / Forecast.

Financials

Units202320222021202020182017
Capital expenditures M ZAR  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 306   892  
Operating Income M ZAR

Heavy Mobile Equipment

Fleet data has not been reported.

Personnel

Mine Management

Source Source
Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 5, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 5, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 5, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 5, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 5, 2023

Total WorkforceYear
Subscription required 2023
Subscription required 2022
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017

Aerial view:

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