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Australia
Flying Fox Mine (Forrestania Operation)

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 Location:
360 km E from Perth, Western Australia, Australia

  Address:
Suite 4, Level 5 South Shore Centre 85 South Perth Esplanade
Perth
Western Australia, Australia
6151
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Fax+61-8-9238-8399
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  • Overview
  • Owners
  • Geology
  • Mining
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  • Production
  • Reserves
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  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Nickel
Mining Method
  • Longhole open stoping
  • Avoca
  • Cemented backfill
  • Paste backfill
Production Start...
Mine Life1 years (as of Jan 1, 2021)
The Flying Fox underground mine remains one of the highest grade nickel mines in the world. Production commenced in 2006, and the mine now operates at depths of over 1km underground.


Owners

Source: p. 70
CompanyInterestOwnership
IGO Ltd. 100 % Indirect
On 20 June 2022, IGO Limited acquired 100% of the issued capital of Western Areas Limited (Western Areas). Western Areas was an ASX listed Australian-based mining and exploration company with a portfolio of operating and development stage mines. It owns a 100% interest in the Forrestania Operation (consisting of the Flying Fox and Spotted Quoll underground mines and the Cosmic Boy processing facility) and the Cosmos Project, both located in Western Australia, together with a substantial exploration portfolio.

Contractors

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Deposit Type

  • VMS


Summary:

Forrestania’s camp of nickel sulphide deposits is hosted by a sequence of ~2.9Ga meta-igneous and metasedimentary rocks that are part of the Forrestania Greenstone Belt (FGB) of the Youanmi Terrane of the Eastern Yilgarn Craton.

Forrestania’s nickel deposits is the ‘Kambalda-style’ Type 1 and Type 2 models where nickel sulphides are interpreted to have accumulated in channelised komatiitic lava flows. Many of Forrestania’s deposits are often tectonically displaced from the original depositional locations and have been deformed and/or dismembered by one or more local and/or regional post-depositional tectonic events.

The main deposit type is the komatiite hosted, disseminated to massive nickel sulphide deposits, which include the Flying Fox and Spotted Quoll deposits. The mineralisation occurs in association with the basal section of high MgO cumulate ultramafic rocks.

The greenstone succession in the district also hosts several orogenic lode gold deposits, of which the Bounty Gold Mine is the largest example.

Flying Fox is hosted by a package of deformed metavolcanics and metasediments that have been intruded by granites. Locally, the geology comprises a strongly foliated succession of komatiites intercalated with metasediments, both of which are typical of the FGB’s Lower Sequence.

Post the primary deposition of the sulphide mineralisation in lava channels, one or more tectonic events have dismembered Flying Fox’s origi ........


Mining Methods

  • Longhole open stoping
  • Avoca
  • Cemented backfill
  • Paste backfill


Summary:

The Flying Fox underground mine has been in operation since 2005 and the current inputs to its ORE are based on operating budgets, and as such the level of study is considered superior in precision to an FS. Flying Fox’s ORE is reported on a >0.8% Ni model cut-off grade, which approximates the break- even grade for processing.

The mining methods at Flying Fox are direct or modifications of the AVOCA mining method, where longhole stoping is used to extract the ore and the void is progressively filled with rock and/or cemented rock or paste fill, depending on local geotechnical conditions. The minimum mining width is 2.0m, with stopes typically 20m along the strike of the ore and from 8 to 17m high.


Crushing and Grinding


Processing

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Summary:

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Production:

CommodityUnits20212020201920182017
Nickel kt  ......  Subscription required  ......  Subscription required  ......  Subscription required1010
All production numbers are expressed as metal in ore.
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Operational Metrics:

Metrics20212020201920182017
Ore tonnes mined  ......  Subscription required  ......  Subscription required231,607 t260,665 t237,119 t
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Reserves at June 30, 2022:
Mineral Resource is reported at cut-of 0.4% Ni.

CategoryTonnage CommodityGradeContained Metal
Probable 0.18 Mt Nickel 2.22 % 4 kt
Indicated 0.66 Mt Nickel 4.48 % 29 kt
Inferred 0.12 Mt Nickel 1.7 % 2 kt
Total Resource 0.78 Mt Nickel 4.05 % 31 kt



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 29, 2022
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Corporate Filings & Presentations:

DocumentYear
Sustainability Report 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Annual Report 2017
Other 2010
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