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Australia
Spotted Quoll Mine (Forrestania Operation)

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 Location:
362 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

StageProduction
Mine TypeUnderground
Commodities
  • Nickel
Mining Method
  • Longhole open stoping
  • Paste backfill
Mine Life4 years (as of Jan 1, 2021)


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.

Spotted Quoll’s mineralisation is of a brecciated style, containing clasts of quartz and garnet schists, and occurs in and along a complex shear zone, which is overlain by BIF and metasediments. As is common in most ultramafic rocks in the Forrestania region, amphibolite grade metamorphism has destroyed any primary volcanic textures. The deformed mineralisation has also undergone hydrothermal alteration that has changed the su ........


Mining Methods

  • Longhole open stoping
  • Paste backfill


Summary:

Spotted Quoll is an underground mine which is a part of Forestania operation.

As end of FY22 mineral resources estimate extends to ~1.3km below surface, and ore mining has reached to a depth of ~1.0km.

The mining method at Spotted Quoll is long hole stoping with filling of the mined voids with paste. The minimum mining width is 3m and the length of stopes ranges from 10 to 30m, depending on geotechnical conditions and local mineralised lense geometry. Stope heights range from 7 to 15m.


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits20212020201920182017
Nickel kt  ......  Subscription required  ......  Subscription required  ......  Subscription required1416
All production numbers are expressed as metal in ore.
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Operational Metrics:

Metrics20212020201920182017
Ore tonnes mined  ......  Subscription required  ......  Subscription required324,395 t346,455 t354,659 t
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Reserves at June 30, 2022:

CategoryTonnage CommodityGradeContained Metal
Probable 0.61 Mt Nickel 3.45 % 21 kt
Indicated 0.47 Mt Nickel 6.31 % 30 kt
Inferred 0.15 Mt Nickel 3.7 % 5 kt
Total Resource 0.62 Mt Nickel 5.7 % 35 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
Year-end Mineral Reserves 2013
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Subscription required - Subscription is required.

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