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Australia
Cloudbreak Mine (Chichester Hub Operation)

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 Location:
87 km SW from Nullagine, Western Australia, Australia

  Address:
Level 2, 87 Adelaide Terrace
East Perth
Western Australia, Australia
6004
Phone  ...  Subscription required
Fax+61-8-6218-8880
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Iron Ore
Mining Method
  • Surface miner
  • Strip mining (roll-over)
  • Truck & Shovel / Loader
  • Backfill
Production Start...


Owners

Source: p. 26,121
CompanyInterestOwnershipInvestor's Info
Fortescue Metals Group Ltd. 100 % Indirect
Chichester Metals Pty Ltd (operator) 100 % Direct
Fortescue’s wholly owned and integrated operations in the Pilbara include the Chichester Hub (Cloudbreak and Christmas Creek).

Chichester Metals Pty Ltd (Licensee), a wholly owned subsidiary of Fortescue Metals Group Ltd (Fortescue). The Cloudbreak Iron Ore Mine is owned and operated by the Licensee.

Contractors

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Deposit Type

  • Banded iron formation
  • Channel Iron (CID)


Summary:

The Cloudbreak, Christmas Creek and Kutayi deposits lie within the Chichester Ranges, in northern Western Australia. Iron mineralisation is hosted by the Nammuldi Member which is the lowest member of the late Archaean aged Marra Mamba Iron Formation (MMIF). The Nammuldi Member is characterised by extensive, thick and podded iron rich bands, separated by equally extensive units of siliceous and carbonate rich chert and shale. The Nammuldi Member in the Chichester Range is interpreted to be up to 60 metres in true thickness. Underlying the Nammuldi Member rocks are black shales and volcanic rocks belonging to the Jeerinah Formation. Extended periods of tectonic activity have variably folded and faulted these rocks, together with weak metamorphism. Subsequent erosion and hardcapping or lateritic processes have altered these rocks, and present outcrop of Nammuldi Member represents a ridge of lowlying hills (relief up to 30 metres) throughout the prospect areas. These ridges are recognised as the Chichester Ranges.

Drilling within the prospects has proved that the Nammuldi target horizon extends below cover away from the hills. In these regions (recognised mineralisation has been intersected more than 6 kilometres from the outcrop) the target iron formation can be overlain by Tertiary age colluvium and alluvium (younger than 65 Million years). This colluvium can contain both cemented and un- cemented detrital products of iron enriched material, BIF, chert and shale wit ........


Mining Methods

  • Surface miner
  • Strip mining (roll-over)
  • Truck & Shovel / Loader
  • Backfill


Summary:

The mining model is based on strip mining. Mining at Cloudbreak will continue to be carried out as open pit strip mining. The pits are developed progressively, where a starter pit is opened (with overburden from the starter pit placed in a small overburden stockpile). As the mining face progresses, the open pit is progressively backfilled and rehabilitated. The majority of the ore will be mined using surface miners. Surface miners can cutto an accuracy of 0.1 m and can extract ore without the need for drilling, blasting, or primary crushers to crush ore. Ore is loaded from the surface miner into trucks for transfer to the OPF. At Cloudbreak the Bigge development entered production in Q3 FY22. Bigge expands Cloudbreak further west and contributes low strip ratio material which supports the overall Fortescue product strategy.


Crushing and Grinding

Crushing/sizing Facilities The crushing and sizing facilities consist of a series of crushers designed to handle standard sized ore and large ROM oversize rocks generated in drill and blast operations, pit floor windrow cleanup and pit wall batter scraping at the mine. The crushing and sizing process will size material to less than 250 – 300 mm such that it can be transported by conveyor to the OPF. In 2021 the two C160 Metso jaw crushers in this building were installed second-hand during the construction of the Cloudbreak mine and were nearing their end of life. This project involved removing the old crushers and replacing them with two new C160 jaw crushers.


Processing

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Summary:

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Combined production numbers are reported under Chichester Hub Operation


Reserves at June 30, 2022:
Mineral Resources are quoted above a cut-off of 53.5% Fe.
Ore Reserve: Cloudbreak 53.0 Approximate ROM Cut-Off Grade (%Fe).

CategoryTonnage CommodityGrade
Proven 291 Mt Iron (hematite) 57.6 %
Probable 99 Mt Iron (hematite) 56.7 %
Proven & Probable 389 Mt Iron (hematite) 57.3 %
Measured 493 Mt Iron (hematite) 57 %
Indicated 198 Mt Iron (hematite) 55.9 %
Inferred 68 Mt Iron (hematite) 55.7 %
Total Resource 759 Mt Iron (hematite) 56.6 %


Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment as of July 13, 2021:
HME TypeModelQuantity
Truck (haul) ....................... Subscription required ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 4, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 4, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 4, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 4, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 4, 2022
Subscription required - Subscription is required.

Staff:

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

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Annual Report 2018
Annual Report 2017
Environmental Impact Statement 2017
Annual Report 2016
Annual Report 2015
Other 2012
Environmental Assessment 2011
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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