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Australia
Cue Gold (Big Bell Mine, Comet Mine) Operation

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 Location:
26 km NW from Cue, Western Australia, Australia

  Address:
Level 6 197 St Georges Terrace
Perth
Western Australia, Australia
6000
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Fax+61-8-9462-3499
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Sub-level caving
  • Sub-level open stoping (SLOS)
  • Bench stoping
  • Longhole stoping
  • Paste backfill
Production Start...
Mine Life10 years (as of Jan 1, 2019)
Cue Gold Operations (CGO) includ the historic mining centres of Big Bell, Cuddingwarra, DayDawn, Tuckabianna and Pinnacles. This package includes two of Australia’s most prolific past producers in the Big Bell mine (2.6 million ounces) and the Great Fingall mine (1.2 million ounces). The CGO processing hub pivots on the 1.2-1.4 Mtpa Tuckabianna processing plant.

The Big Bell mine achieved commercial production in April 2022 and production rates have been growing since.
Latest NewsWestgold Resources Limited: Spectacular Gold Intersection Shows Major Upside Potential Against Current Mine Plan     March 27, 2023


Owners

Source: p. 10
CompanyInterestOwnershipInvestor's Info
Westgold Resources Ltd. 100 % Indirect
Big Bell Gold Operations Pty Ltd, a wholly owned subsidiary of Westgold Resources Limited (Westgold), owns and operates the Cue Gold Operations (CGO).

Contractors

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Deposit Type

  • Metamorphic hosted
  • Porphyry


Summary:

CGO is located in the Achaean Murchison Province, a granite-greenstone terrane in the northwest of the Yilgarn Craton. Greenstone belts trending north-northeast are separated by granite-gneiss domes, with smaller granite plutons also present within or on the margins of the belts.

Mineralisation at Big Bell is hosted in the shear zone (Mine Sequence) and is associated with the post-peak metamorphic retrograde assemblages. Stibnite, native antimony and trace arsenopyrite are disseminated through the K-feldspar-rich lode schist. These are intergrown with pyrite and pyrrhotite and chalcopyrite. Mineralisation outside the typical Big Bell host rocks (KPSH), for example 1,600N and Shocker, also display a very strong W-As-Sb geochemical halo.

Numerous gold deposits occur within the Cuddingwarra Project area, the majority of which are hosted within the central mafic-ultramafic ± felsic porphyry sequence. Within this broad framework, mineralisation is shown to be spatially controlled by competency contrasts across, and flexures along, layer-parallel D2 shear zones, and is maximised when transected by corridors of northeast striking D3 faults and fractures.

The Great Fingall Dolerite hosts the majority gold mineralisation within the portion of the greenstone belt proximal to Cue (The Day Dawn Project Area). Unit AGF3 is the most brittle of all the five units and this characteristic is responsible for its role as the most favourable lithological host to ........


Mining Methods

  • Truck & Shovel / Loader
  • Sub-level caving
  • Sub-level open stoping (SLOS)
  • Bench stoping
  • Longhole stoping
  • Paste backfill


Summary:

In FY22, the Tuckabianna plant received underground ore from the large Big Bell underground and the smaller Comet underground mine as well ore from the Cuddingwarra open pits. While Big Bell was the primary producer of ore to the Tuckabianna mill, the Comet underground mine provided supplementary feed during the year. After four years of dewatering, mine rehabilitation, refurbishment and ramp up, the Big Bell mine achieved commercial production in April 2022 and production rates have been growing since. Several open pits were mined around Cue in FY22. With large stockpiles accumulated, the open pit program ceased at the end of the financial year. Exploration and viability studies were carried out during FY22 at the previously mined Fender open pit mine on the southern limits of the Big Bell shear to evaluate the economics of an underground operation. An exploration decline was commenced then paused due with the higher tonnages coming from Big Bell. Open Pit A majority of the open pits have a final design wall angle of 39-46 degrees. Dilution of the ore through the mining process has been accounted for within the Ore Reserve quoted inventory. Various dilution ratios are used to represent the style of mineralisation. Minimum mining widths have been accounted for in the designs, with the utilisation of 40t or 90t trucking parameters depending upon the size of the pit excavation. Underground In large disseminated orebodies sub level caving, sub level open stoping or singl ........


Crushing and Grinding


Processing

Source: Subscription required

Summary:

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Production:

CommodityUnits20222021202020192018
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required8,917
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20222021202020192018
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required791,482 t32,745 t
Tonnes processed  ......  Subscription required  ......  Subscription required  ......  Subscription required1,169,527 t204,269 t
Annual processing capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required1.3 Mt1.3 Mt
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Reserves at June 30, 2022:

CategoryTonnage CommodityGradeContained Metal
Proven 4,779 kt Gold 2.75 g/t 423 koz
Probable 11,432 kt Gold 2.6 g/t 954 koz
Proven & Probable 16,209 kt Gold 2.64 g/t 1,378 koz
Measured 6,287 kt Gold 3.1 g/t 626 koz
Indicated 22,642 kt Gold 2.52 g/t 1,834 koz
Inferred 15,824 kt Gold 2.42 g/t 1,233 koz
Total Resource 44,753 kt Gold 2.57 g/t 3,693 koz

Commodity Production Costs:

CommodityUnits2021202020192018
All-in sustaining costs (AISC) Gold AUD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1,623 / oz†  
C1 cash costs Gold AUD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1,445 / oz†  
All-in costs Gold AUD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 2,525 / oz†  
C2 total cash costs Gold AUD  ......  Subscription required†
† Net of By-Product.
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Financials:

Units2021202020192018
Capital expenditures M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required 50.6  
Revenue M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required 14.4  
Gross profit M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 8, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 8, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 8, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 8, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 8, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2022
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Press Release 2022
Sustainability Report 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Press Release 2013
Subscription required - Subscription is required.

News:

NewsDate
Westgold Resources Limited: Spectacular Gold Intersection Shows Major Upside Potential Against Current Mine Plan March 27, 2023
Westgold Resources Limited: Big Bell Operational Update March 13, 2023

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