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Australia
Warrawoona Mine

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 Location:
20 km SE from Marble Bar, Western Australia, Australia

  Address:
Suite 12, 11 Ventnor Ave
West Perth
Western Australia, Australia
WA 6005
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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Longhole open stoping
Production Start...
Mine Life8.3 years (as of Jan 1, 2020)
September 29, 2020 - Calidus Resources has commenced early works at the Warrawoona gold project in Western Australia following the release of its feasibility study (FS).

August 16, 2021 - Mining has commenced at Calidus’ Warrawoona gold project, with ore now being delivered to the run-of-mine (ROM) pad.


Owners

Source: p. 1, 55
CompanyInterestOwnership
Calidus Resources Ltd. 100 % Indirect
Calidus Resourcesis an ASX listed gold exploration company which controls the Warrawoona Gold Project in the East Pilbara district of the Pilbara Goldfield in Western Australia.
The historical Warrawoona mining centre is situated in the East Pilbara District of the Pilbara Goldfield of Western Australia. Calidus Resources Pty Ltd owns 100% of Keras (Pilbara) Gold Pty Ltd, the registered holder of the tenements.

Contractors

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Deposit Type

  • Vein / narrow vein


Summary:

The Warrawoona Project leases lie within the Warrawoona Group, one of the oldest greenstone belts within the Pilbara Craton. Composed largely of high-Mg basaltic lavas with lesser tholeiite, andesite, sodic dacite, potassic rhyolite, chert and banded iron formation (BIF), all metamorphosed to greenschist facies, the Warrawoona Group is sandwiched between the Mount Edgar batholith to the north and the Corunna Downs batholith to the south.

Gold occursin quartz veins and stringersin the Klondyke, Copenhagen and Fieldings Gully Shears and mineralisation is associated with quartz-carbonate-sericite-pyrite alteration. Quartz veins and stringers are generally approximately parallel to the predominant shear direction. The bulk of the gold mineralisation is hosted in strongly sericitised and sheared mafic units with thin chert bands marking probable stratigraphic breaks.

Over some abandoned workings gold mineralisation is associated with copper as indicated by the presence of malachite and other copper carbonates.

The Warrawoona Project is located within the East Pilbara Terrane of the Archean Pilbara Craton in Western Australia. The East Pilbara Terrane is characterised by large, dome-shaped composite granitic complexes wrapped by greenstone belts. The granite-greenstone terrane is unconformably overlain by little-deformed volcanic and sedimentary rocks of the Hamersley Province. The Klondyke deposit is hosted within the Warrawoona Group, a package o ........


Mining Methods

  • Truck & Shovel / Loader
  • Longhole open stoping


Summary:

Calidus has undertaken a conventional approach to the development of open pit and underground mine designs and schedules supporting this Feasibility Study. Resource models, key assumptions and inputs were provided to external consultants (Intermine Engineering Consultants for open pit studies, and Entech Pty Ltd for underground studies).

Intermine and Entech interrogated the block models generated by Optiro (Klondyke & St George Open Pit), Widenbar & Associates (Klondyke Underground) and Calidus (Copenhagen, Fielding’s Gully) undertaking detailed financial analysis utilising Whittle and Deswik MSO software for open pit and underground mining respectively.

A competitive tender process was undertaken for the Open Pit mining contract. Macmahon Holdings Limited (Macmahan) were awarded the preferred tender status for open pit mining (ASX release 17th September 2020 Construction underway at Warrawoona Gold Project).

Early contract engagement with Macmahon has given Macmahon the opportunity to have input into the final open pit mining schedule for the Feasibility Study. Mining rates used in the Feasibility Study are the tendered rates from Macmahon.

Given that the underground does not commence until Year 3 of the Project, the underground schedule was provided to underground mining contractors with a request to provide budget pricing. Macmahon underground rates were also utilised for the Feasibility Study.

Open Pit
The K ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnitsAvg. Annual (Projected)LOM (Projected)
Gold oz 90,000658,277
All production numbers are expressed as metal in doré.


Reserves at September 29, 2020:
The resource has been reported at a 0.5 g/t Au cut-off.

CategoryTonnage CommodityGradeContained Metal
Proven 2.057 Mt Gold 1 g/t 66 koz
Probable 12.253 Mt Gold 1.2 g/t 481 koz
Proven & Probable 14.31 Mt Gold 1.2 g/t 547 koz
Measured 2.3 Mt Gold 0.98 g/t 72 koz
Indicated 30.4 Mt Gold 1 g/t 982 koz
Inferred 11 Mt Gold 1.33 g/t 442 koz
Total Resource 43.7 Mt Gold 1.06 g/t 1,495 koz



Heavy Mobile Equipment as of February 28, 2022:
HME TypeModelSizeQuantityLeased or
Contractor
Excavator 200 t ....................... Subscription required Leased
Truck (haul) ....................... Subscription required 100 t ....................... Subscription required Leased
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 17, 2022
....................... Subscription required ....................... Subscription required Subscription required May 17, 2022
....................... Subscription required ....................... Subscription required Subscription required May 17, 2022
....................... Subscription required ....................... Subscription required Subscription required May 17, 2022
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Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2020
................................... Subscription required 2020
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