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Australia
Plutonic Operation (Hermes Mine, Plutonic Mine, Plutonic(Open pit) Mine)

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 Location:
293 km SE from Paraburdoo, Western Australia, Australia

  Regional Office:
Level 1, 30 Richardson Street
West Perth
Western Australia, Australia
6005
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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Gold
Mining Method
  • Jumbo stripping (slashing)
  • Airleg stoping
  • Truck & Shovel / Loader
  • Longhole open stoping
Production Start...
Mine Life2024
The Plutonic Gold Operations include the Plutonic underground gold mine and central mill, numerous open pit projects including the Plutonic Main Pit push-back project, the Hermes open pit projects, and an interest in the Bryah Basin joint venture.
Latest NewsSuperior Gold Welcomes The Endorsement From Three Highly Experienced Institutional Mining Investors For The Arrangement With Catalyst...     May 31, 2023


Owners

Source: p. 3,11
CompanyInterestOwnership
Superior Gold Inc. 100 % Indirect
Billabong Gold Pty. Ltd. (operator) 100 % Direct
Superior Gold Inc. is a Canadian based gold producer that owns and operates the Plutonic Gold Operations located in Western Australia.

Billabong Gold Pty. Ltd. is the wholly-owned subsidiary of Superior Gold Inc.

Contractors

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Deposit Type

  • Metamorphic hosted
  • Vein / narrow vein
  • Breccia pipe / Stockwork
  • Replacement


Summary:

Deposit Type The Plutonic Gold Mine deposits are Archean Greenstone gold deposits. The gold mineralisation is predominantly structurally controlled occurring in a variety of stratigraphic settings, mainly associated with replacement-style lodes and stockwork veining within a wide variety of host rocks ranging from ultramafic and mafic volcanic rocks, metasediments, felsic intrusive, volcanoclastic units, and banded iron formations. In the Hermes Gold Mine and BBJV Projects there are two broad mineralisation styles (Outhwaite, 2013) referred to here as the Peak Hill Type and the Bryah Type. The Peak Hill Type gold deposits are hosted in rocks that are generally highly deformed (four or more fold events) and metamorphosed (up to amphibolite facies), generally represented by the Peak Hill Schist Formation. Mineralisation is early in the paragenesis, (syn- to post-D1 isoclinal folding) with folded mineralisation commonly observed. Previously mined examples include Peak Hill Main/Five-Ways, Mt Pleasant, Jubilee, Wilgeena and St Crispin. The Hermes deposits may be examples of mineralisation that belongs in this category. The local controls on this deposit class are difficult to identify, because of the effects of strong, postmineralisation deformation, and probable remobilisation of Au. Mineralisation Plutonic The Plutonic Gold Mine Mineral Resources mined and unmined lie with a surface area of approximately 10 km east-west by 5 km north-south. The historical Plutonic Main Pit ........


Mining Methods

  • Jumbo stripping (slashing)
  • Airleg stoping
  • Truck & Shovel / Loader
  • Longhole open stoping


Summary:

Ore feed to the mill during 2020 - 21 was from mining operations at Plutonic Underground (underground mining methods), the Area 4 and Perch Open Pits and surface stockpiles of mineralised waste which commenced in November 2019 after the Hermes Open Pit ores were depleted. The current plan anticipates continued ore feed from these mining operations.

There is substantial site history and experience with the underground mining methods employed. The only previously unmined area in the underground Mineral Reserve mine plan is the Baltic Extension and Western Front (Indian & Baltic West) area, which is envisaged to continue to employ those mining methods.

Open pit mining has been undertaken by Billabong at Area 4 and Perch over the last year and the open pit Mineral Reserve is based on this extensive experience.

Plutonic Underground
Plutonic Underground is a mechanised access underground mine that has been in continuous operation since 1995. Historically the mine has produced at a rate of up to 1,400 ktpa ore, although in recent years' production has stabilised at approximately 800 ktpa. The current constraint on underground production is not the infrastructure: the constraint is gathering the data to move the stopes through the planning process and into production.

The Plutonic Underground has seven active mining zones. Seven of these mining zones are well-established having been active for several years (Established Areas). The eig ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits20222021202020192018
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required90
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
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Operational Metrics:

Metrics2021202020192018
Ore tonnes mined  ......  Subscription required  ......  Subscription required1,504 kt1,707 kt
Tonnes milled  ......  Subscription required  ......  Subscription required1,681 kt1,620 kt
Waste  ......  Subscription required  ......  Subscription required1,595 kt10,203 kt
Stripping / waste ratio  ......  Subscription required  ......  Subscription required2.3 11.4
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Reserves at December 31, 2021:
Open pit Mineral Reserves are estimated at a cut-off grade of 0.5 g/t Au. Underground Mineral Reserves are estimated at a stoping cut-off grade averaging 1.8 g/t dependent on the mining area.

Mineral Resource estimates for underground were at a 1.7 g/t cut-off and open pit at 0.4 g/t cut-off.

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven & Probable In-Situ (OP) 0.41 Mt Gold 1.7 g/t 22 koz
Proven & Probable In-Situ (UG) 5.15 Mt Gold 3.7 g/t 608 koz
Proven & Probable Total 5.55 Mt Gold 3.5 g/t 630 koz
Measured & Indicated In-Situ (OP) 8.06 Mt Gold 2.1 g/t 556 koz
Measured & Indicated In-Situ (UG) 9.15 Mt Gold 4.6 g/t 1,368 koz
Measured & Indicated Total 17.21 Mt Gold 3.5 g/t 1,924 koz
Inferred In-Situ (OP) 11.48 Mt Gold 1.7 g/t 639 koz
Inferred In-Situ (UG) 20.83 Mt Gold 5 g/t 3,334 koz
Inferred Total 32.3 Mt Gold 3.8 g/t 3,973 koz

Commodity Production Costs:

CommodityUnits20222021202020192018
Total cash costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1,155 / oz†  
All-in sustaining costs (sold) Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1,266 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
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Financials:

Units2021202020192018
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 4.4  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 107.5  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -13.2  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -18.8  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -13.3  
Operating Cash Flow M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 6.6  
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 31, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 17, 2022
....................... Subscription required ....................... Subscription required Subscription required May 31, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 17, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 17, 2022
....................... Subscription required ....................... Subscription required Subscription required May 31, 2022
....................... Subscription required ....................... Subscription required Subscription required May 31, 2022
....................... Subscription required ....................... Subscription required Subscription required May 31, 2022
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
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................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Fact Sheet 2018
Management Discussion & Analysis 2018
Technical Report 2017
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News:

NewsDate
Superior Gold Welcomes The Endorsement From Three Highly Experienced Institutional Mining Investors For The Arrangement With Catalyst... May 31, 2023
Superior Gold Announces Shareholder Meeting For June 26, 2023 And Reiterates Board Recommendation That Shareholders Vote In Favour Of Proposed Acquisition... May 16, 2023
Superior Gold Announces Full-Year 2022 Financial Results April 26, 2023
Superior Gold and Catalyst Metals Announce Court Ruling Appeal April 19, 2023

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