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South Africa
Beeshoek Mine

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 Location:
10 km NW from Postmasburg, South Africa

  Address:
ARM house 24 Impala Road Chislehurston
Private Bag X03 Northlands 2116
Johannesburg
South Africa
2196
Phone+27 (0) 11 779 1000
EmailEmail
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Iron Ore
Mining Method
  • Truck & Shovel / Loader
Production Start1964
Mine Life13 years (as of Jan 1, 2022)


Owners

Source: p. 75,83
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



Deposit Type

  • Banded iron formation

Source: Source

Summary:

Beeshoek mine is situated within a sequence of early Proterozoic sediments of the Transvaal Supergroup. 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 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. 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 conglomerategritstone-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. Numerous deep 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. The southern Beeshoek orebodies were exposed to more erosion and hence are more localised and smaller. Outcrops are limited to the higher topography on the eastern side of the properties. Down-dip to the west, the ore is thin and deep.


Mining Methods

  • Truck & Shovel / Loader

Source:

Summary:

Mining operations are all open-pit, based on the conventional drill-and-blast, truck-and-shovel operations. Run-of-mine ore is crushed and stored as ‘on-’ or ‘off-grade’ on blending stockpiles.


Crushing and Grinding


Processing

  • Wash plant
  • Jig plant
  • Crush & Screen plant
  • Dewatering

Source: Source

Summary:

Run-of-mine ore is crushed and stored as “on-” or “off-grade” on blending stockpiles. Ore from the stockpiles is either sent to the wash-and-screen plants or, if “off-grade”, to the beneficiation plants. The washing and screening plants consist primarily of tertiary crushing, washing, screening, conveying and stacking equipment. The beneficiation plants consist of tertiary crushers; scrubbers; coarse and fine jigs; lumpy and fines product stockpiles; and a rapid load-out facility. No chemicals are being used in any of the processing plants. The washing and screening plants consist primarily of tertiary crushing, washing, screening, conveying and stacking equipment. The beneficiation plants consist of tertiary crushers; scrubbers; coarse and fine jigs; lumpy and fines product stockpiles; and a rapid load-out facility. No chemicals are being used in any of the treatment plants. After the ore is mined and blended in the pits, it is loaded onto dump trucks and transported to the primary crushers. After crushing, the ore is stacked onto a longitudinal blending bed that serves as a buffer between the mining and the ore preparation plant at Beeshoek North. The ore is then moved via conveyor to a scalping screen, where oversized rock is separated and transferred into a secondary crusher. All crushed material is recombined and conveyed to the washing and screening section. Contaminated ore is directed to the jig facility for beneficiation. The washing and screening plant is capable of handling 1,400 tons per hour at full capacity and is controlled within the processing equipment efficiency limitations to maintain the required chemical and physical criteria. After washing and screening, the final products – Lump, Fines and DR Lump – are stockpiled on final product stockpiles located at the mine’s railway siding. The jig plant is capable of processing 650 tons lower grade contact ore per hour. After secondary crushing, the off-grade ore is placed on the feed stockpile at the jig plant. Ore is then pulled from the stockpile for tertiary crushing. Subsequently, the material is stacked on to Lumpy and Fines jig stockpiles. The ore from these separate stockpiles is then fed into the jig plant, where pulsating water flows into the bed to separate the less dense fraction waste from the denser fraction middling and high quality ore. The waste is dewatered on screens and conveyed to a waste stockpile. The middling and high quality ore is passed over its own dewatering screens before being conveyed to separate conical stockpiles. Feeders beneath these stockpiles combine the products into the desired ratio to produce a beneficiated product ready for blending into the final product. The final products is then stockpiled onto the same final product stockpiles as the washing plant product.


Production:

CommodityUnits2023202220212020201920182017
Iron Ore Mt 3 ^3.13.333.63.93.2
All production numbers are expressed as lump & fines. ^ Guidance / Forecast.

Operational Metrics:

Metrics202220212020201920182017
Ore tonnes mined 4.45 Mt5.52 Mt4.26 Mt4.44 Mt4.17 Mt3.39 Mt

Reserves at June 30, 2022:
Key assumptions for Mineral Resources: Grade cut-off: 60% Fe (Open Pit);
Key assumptions for Mineral Resources: Jig stockpile cut-off grade: 45% Fe.

CategoryOreTypeTonnage CommodityGrade
Proven In-Situ (OP) 52.01 Mt Iron 64.1 %
Probable Stockpiles 0.64 Mt Iron 57.09 %
Probable In-Situ (OP) 6.12 Mt Iron 60.24 %
Proven & Probable In-Situ (OP) 58.13 Mt Iron 63.32 %
Measured Stockpiles 2.41 Mt Iron 56.46 %
Measured In-Situ (OP) 84.45 Mt Iron 64.3 %
Indicated Stockpiles 14.64 Mt Iron 52.72 %
Indicated In-Situ (OP) 9 Mt Iron 63.14 %
Measured & Indicated Stockpiles 17.05 Mt Iron 53.25 %
Measured & Indicated In-Situ (OP) 93.45 Mt Iron 64.19 %
Inferred In-Situ (OP) 2.5 Mt Iron 60 %

Commodity Production Costs:

CommodityUnits2021202020192018
Site cash costs (produced) Iron Ore ZAR 263 / t   246 / t   234 / t   223 / t  

Financials:

Units20212020201820172016
Capital expenditures M ZAR 614  670   474   277   436  
Operating Income M ZAR 318  


Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
Maintenance Planner Louisa Gabara LinkedIn Oct 28, 2022
Senior General Manager Maryke Burger LinkedIn Nov 25, 2022
Technical Services Manager Dorianne Odendaal LinkedIn Oct 28, 2022

Staff:

Total WorkforceYear
1,242 2022
1,222 2021
1,057 2020
1,445 2019
1,378 2018
1,076 2017

Corporate Filings & Presentations:

DocumentYear
Integrated Report 2022
Year-end Mineral Reserves 2022
Integrated Report 2021
Other 2021
Year-end Mineral Reserves 2021
Integrated Report 2020
Other 2020
Year-end Mineral Reserves 2020
Integrated Report 2019
Year-end Mineral Reserves 2019
Integrated Report 2018
Other 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Year-end Mineral Reserves 2017
Annual Report 2016
Year-end Mineral Reserves 2016

Aerial view:

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