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Australia
Federation Project (Hera)

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 Location:
90 km SE from Cobar, New South Wales, Australia

  Project Contacts:
Level 17, 144 Edward Street
Brisbane
Queensland, Australia
4000
Phone  ...  Subscription required
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WebsiteWeb
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Overview

StagePermitting
Mine TypeUnderground
Commodities
  • Zinc
  • Lead
  • Gold
  • Silver
  • Copper
Mining Method
  • Longhole stoping
  • Transverse stoping
  • Longitudinal retreat
  • Cemented backfill
  • Paste backfill
Mine Life8 years (as of Jan 1, 2022)
The Federation deposit hosts high-grade zinc, lead, and gold mineralisation and is located approximately 10km south of our Hera Mine. Project development will involve the underground mining of the Federation deposit for treatment through processing circuits at the Peak and Hera sites.


Owners

Source: p. 6,55
CompanyInterestOwnership
Aurelia Metals Ltd. 100 % Indirect

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Breccia pipe / Stockwork
  • Vein / narrow vein


Summary:

The Federation deposit is located on the eastern margin of the Palaeozoic Cobar Basin, an intracratonic basin within the Lachlan Orogen. Mineralisation at Federation is epigenetic and structurally controlled with several steeply dipping vein breccia/massive sulphide lenses developed in the centre of a broad northeast-southwest striking corridor of quartz–sulphide vein stockwork mineralisation. The mineralisation is hosted by fine-grained sedimentary rocks and is best developed within open upright anticline closures in areas of strong rheology contrast imposed by early stratiform alteration.

Massive sulphide and sulphide breccia base metal mineralisation is typically zinc-rich and associated with intense cross-cutting black chlorite alteration in the lower parts of the known deposit, with silica-sulphide dominant infill in the upper parts. Late bedding-parallel faults have been identified that may have caused some brittle offset within the system. These structures possibly started as extensional faults and could have focused hydrothermal fluids during alteration and mineralisation.


Mining Methods

  • Longhole stoping
  • Transverse stoping
  • Longitudinal retreat
  • Cemented backfill
  • Paste backfill


Summary:

The mining evaluation of the Federation Mine considered the technical and economic aspects of a new underground mine using information available at February 2022.

The selected mining method is longitudinal retreat longhole stoping where the deposit is narrow, and transverse longhole stoping where the deposit is wider. Stope voids will be backfilled to maximise ore recovery and maintain excavation stability, primarily using pastefill in longitudinal stopes, primary transverse stopes, and in areas of poorer ground conditions. Unconsolidated rockfill (URF) and cemented rockfill (CRF) will be used as backfill material prior to the pastefill plant being available. The preferred timing for pastefill plant operation is July 2024.

Haul trucks will transport ore from the underground mine to a surface ROM ore pad adjacent to the boxcut. Ore will be crushed on surface at the Federation site and transported to the Hera and Peak process plants using onhighway trucks. Filtered tailings will be backhauled by on-highway trucks from the Hera site for use in pastefill. Stockpiled surface waste rock will be back-loaded into underground dump trucks for haulage and placement into stope voids when waste generation from development mining cannot satisfy URF and CRF backfill placement demand.

Various level spacings and stope strike lengths were adopted to account for variable ground conditions and dominant geological structures. The typical stope height is 30m floor ........


Crushing and Grinding


Processing

Source: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityUnitsAvg. AnnualLOM
Zinc kt 44313
Lead kt  ......  Subscription required  ......  Subscription required
Gold koz  ......  Subscription required  ......  Subscription required
Silver koz  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in concentrate.

Operational Metrics:

Metrics
Annual mining capacity  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

Combined reserves/resources are reported under Hera


Commodity Production Costs:

CommodityUnitsAverage
Assumed price Lead USD  ......  Subscription required&nbs
Assumed price Zinc USD  ......  Subscription required&nbs
Assumed price Copper USD  ......  Subscription required&nbs
Assumed price Silver USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2022 study / presentation.
Subscription required - Subscription is required.

Operating Costs:

Units2022
UG mining costs ($/t milled) AUD 108 *
Processing costs ($/t milled) AUD  ......  Subscription required
G&A ($/t milled) AUD  ......  Subscription required
Total operating costs ($/t milled) AUD  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M AUD  ......  Subscription required
Sustaining CapEx $M AUD  ......  Subscription required
Total CapEx $M AUD  ......  Subscription required
UG OpEx $M AUD  ......  Subscription required
Processing OpEx $M AUD 240
G&A costs $M AUD 94
Total OpEx $M AUD  ......  Subscription required
Royalty payments $M AUD  ......  Subscription required
Gross revenue (LOM) $M AUD  ......  Subscription required
EBITDA (LOM) $M AUD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M AUD  ......  Subscription required
Pre-tax NPV @ 7% $M AUD  ......  Subscription required
After-tax NPV @ 7% $M AUD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.


Proposed Heavy Mobile Equipment as of October 10, 2022:
HME TypeQuantity
Cable bolter ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 15, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2022

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Feasibility Study Report 2022
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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