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Australia
Meekatharra Gold (MGO) Operation

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 Location:
1 km E from Meekatharra, 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)
  • Longhole stoping
  • Bench stoping
Production Start...
Mine Life4 years (as of Jan 1, 2019)
Meekatharra Gold Operations (MGO) include the historic gold mining centres of Meekatharra North, Paddy’s Flat, Yaloginda, Nannine and Reedy’s. The MGO processing hub incorporates the 1.6-1.8 Mtpa Bluebird processing plant.

The Bluebird underground mine has been expanding rapidly since recommencement of mining in mid FY2. With the expansion of Bluebird underground, at the end of FY22 Westgold paused operations at South Emu - Triton in the Reedy’s area to reassess its economics.
Latest News‘Game-changer’ drilling update for Westgold     February 9, 2023


Owners

Source: p. 10
CompanyInterestOwnershipInvestor's Info
Westgold Resources Ltd. 100 % Indirect
The CMGP (Central Murchison Gold Project (Meekatharra Gold Operations (MGO) + CGO (Cue Gold Operations) consolidated) tenements are held by the Big Bell Gold Operations (BBGO) of which Westgold has 100% ownership.

Contractors

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Deposit Type

  • Sedimentary - Volcanogenic
  • Banded iron formation hosted
  • Vein / narrow vein
  • Breccia pipe / Stockwork


Summary:

MGO 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.

The Paddy’s Flat area is located on the western limb of a regional fold, the Polelle Syncline, within a sequence of mafic to ultramafic volcanics with minor interflow sediments and banded iron-formation. The sequence has also been intruded by felsic porphyry dykes prior to mineralisation. Mineralisation is located along four sub-parallel trends at Paddy’s Flat which can be summarized as containing three dominant mineralisation styles:
• Sulphide replacement BIF hosted gold. Quartz vein hosted shear-related gold.
• Quartz-carbonate-sulphide stockwork vein and alteration related gold.

The Yaloginda area is a gold-bearing Archaean greenstone belt situated ~15km south of Meekatharra. The deposits in the area are hosted in a strained and metamorphosed volcanic sequence that consists primarily of ultramafic and high-magnesium basalt with minor komatiite, peridotite, gabbro, tholeiitic basalt and interflow sediments. The sequence was intruded by a variety of felsic porphyry and intermediate sills and dykes.

The Reedy’s mining district is located approximately 15 km to the south-east to Meekatharra and to the south of Lake Annean. The Reedy gold deposits occur with- ........


Mining Methods

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


Summary:

For FY22, the Bluebird plant received underground ore from the Paddy’s Flat, South Emu - Triton and Bluebird underground mines and supplementary low grade stockpiles.

The Bluebird underground mine has been expanding rapidly since recommencement of mining in mid FY22, with further extensions and opportunities being identified. Overall expansion plans are being developed to determine the true potential of this asset.

With the expansion of Bluebird underground, at the end of FY22 Westgold paused operations at South Emu - Triton in the Reedy’s area to reassess its economics.

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 single level bench stoping production methodologies are used. In narrow vein laminated quartz hosted domains a conservative narrow bench style mining method is used. In narrow flat dipping deposits a Flat Long Hole process is adopted (with fillets in the footwall for rill angle) and or jumbo stoping. Minimum mining widths have been applied i ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits2022202120202019201820172016
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required112,430101,33937,182
All production numbers are expressed as metal in doré.
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Operational Metrics:

Metrics202220212020201920182017
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required1,121,935 t1,628,282 t1,550,040 t
Tonnes processed  ......  Subscription required  ......  Subscription required  ......  Subscription required1,310,499 t1,627,141 t1,516,658 t
Annual processing capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required1.5 Mt1.7 Mt
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Reserves at June 30, 2022:

CategoryTonnage CommodityGradeContained Metal
Proven 1,088 kt Gold 2.57 g/t 90 koz
Probable 3,110 kt Gold 3.23 g/t 323 koz
Proven & Probable 4,198 kt Gold 3.06 g/t 413 koz
Measured 2,655 kt Gold 3.22 g/t 275 koz
Indicated 23,080 kt Gold 1.91 g/t 1,416 koz
Inferred 19,092 kt Gold 2 g/t 1,226 koz
Total Resource 44,826 kt Gold 2.02 g/t 2,914 koz

Commodity Production Costs:

CommodityUnits202120202019201820172016
All-in sustaining costs (AISC) Gold AUD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1,492 / oz†   1,303 / oz†   1,436 / oz†  
C1 cash costs Gold AUD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1,260 / oz†   1,133 / oz†   1,255 / oz†  
All-in costs Gold AUD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 2,131 / oz†   1,842 / oz†   3,154 / oz†  
C2 total cash costs Gold AUD  ......  Subscription required†
† Net of By-Product.
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Financials:

Units202120202019201820172016
Capital expenditures M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required 92.4   78   70.6  
Revenue M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required 181.3   167.6   56.5  
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 9, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 9, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 9, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 9, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 9, 2022
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Staff:

Total WorkforceYear
Subscription required 2022
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Sustainability Report 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... 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
Annual Report 2018
Annual Report 2017
Annual Report 2016
Annual Report 2013
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News:

NewsDate
‘Game-changer’ drilling update for Westgold February 9, 2023

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