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Australia
Area C Operation (South Flank Mine)

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 Location:
92 km NW from Newman, Western Australia, Australia

  Regional Office:
125 St Georges Terrace
Perth
Western Australia, Australia
6000
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  • Production
  • Reserves
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Iron Ore
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mining Area C, part of Western Australia Iron Ore (WAIO), is one of five mining hubs in the Pilbara region of Western Australia.

Mining Area C consists of open-cut mines, three ore handling plants and one train load-out facility.


Owners

Source: p. 200
CompanyInterestOwnershipInvestor's Info
Mitsui Iron Ore Corporation Pty Ltd. 7 % Indirect
Itochu Minerals & Energy Australia Pty Ltd (IMEA) 8 % Indirect
BHP Group Ltd. 85 % Indirect
BHP Billiton Minerals Pty Ltd. (operator) 85 % Indirect
BHP 85%, Mitsui Iron Ore Corporation 7%, ITOCHU Minerals and Energy of Australia 8%.

Contractors

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Deposit Type

  • Banded iron formation


Summary:

The Pilbara bioregion, where the Proposal (Mining Area C/South Flank) is located, is situated in the south-eastern comer of the Pilbara Craton. The cratonic basement comprises Archaean granite-greenstone and is unconformably overlain by the late Archaean to Early Proterozoic deposits of the Hamersley Basin. The Hamersley Basin can be divided into three stratigraphic groups: the Fortescue, Hamersley and Turee Creek groups. Of these groups, the Fortescue and Hamersley groups outcrop in the immediate area Mining Area C.

The Hamersley Group is seen throughout the Hamersley Basin and forms the outcrop of Mining Area C. It is a sedimentary sequence comprising banded iron formations (BIFs), shales and dolomites with minor felsic volcanics and intrusive dolerite dykes and sills. The group contains both the Brockman and Marra Mamba Iron formations, which together host most of the known major iron ore deposits in the Pilbara region. The six lowermost formations of the Hamersley Group that exist within the area are listed below in order of increasing age:

1. Weeli Wolli Formation.

2. Brockman Iron Formation. Ore mineralisation from the Packsaddle Range deposits is contained within the Brockman Iron Formation, composed of a sequence of interbedded Banded Iron Formation, shales, siltstones and cherts. The four members comprising of the formation are:
- Yandicoogina Shale Member (shale and BIF);
- Joffre Member (BIF with minor shale bands);


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mining Area C is open-cut.

Mining continues through conventional open cut mining methods, including drilling, blasting, and categorisation of blasted material into iron ore or waste rock.

WAIO open-cut mining uses face shovels, front-end loaders or backhoe excavators. The full bench is drilled and blasted for a 12 m height, sampled three times in 4 m increments and three 4 m flitches are then mined.

Ore and Waste haulage is done with both manually operated and autonomous haul trucks. Waste is hauled directly to the adjacent waste storage areas either ex-pit (on surface) or inpit. Waste material is also utilised as fill material for development works and rehabilitating the completed waste dumps.

Ore is hauled to the Run-of-Mine (ROM) pad where it is stockpiled and blended for ore quality before feeding to the crushers using loaders. Some of the ore suitable for blending is also hauled directly to the crushers.


Crushing and Grinding
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Processing

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Summary:

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Production:
South Flank ramp up to full production is contributing to record production from the Mining Area C (MAC) hub.

CommodityUnits2022202120202019201820172016
Iron Ore kwmt  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required60,60857,34655,058
All production numbers are expressed as lump & fines.
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Operational Metrics:

Metrics202020192018201720162015
Plant annual capacity  ......  Subscription required60 Mt60 Mt60 Mt60 Mt60 Mt
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Reserves at June 30, 2022:
The cut-off grade used for estimating the Mineral Reserves for both BKM and MM ore types is typically Fe = 58% with minor exceptions.

Cut-off grades used for estimating the Mineral Resources are: BKM – 54% Fe, MM – 54% Fe, CID – 52% Fe and DID – 58% Fe and <= 6% Al2O3.

CategoryTonnage CommodityGrade
Proven 1,071 Mt Iron 62 %
Probable 1,212 Mt Iron 61 %
Proven & Probable 2,282 Mt Iron 61.5 %
Measured 117.64 Mt Iron 56.7 %
Indicated 576.47 Mt Iron 58.8 %
Measured & Indicated 694.1 Mt Iron 58.4 %
Inferred 4,588 Mt Iron 59.9 %


Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment:

Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 26, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Dec 5, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 5, 2022
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Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Form 20-F 2022
Press Release 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Other 2018
Annual Report 2017
Press Release 2017
Annual Report 2016
Press Release 2016
Annual Report 2015
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