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Australia
Rover 1 Project

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 Location:
68 km SW from Tennant Creek, Northern Territory, Australia

  Project Contacts:
Suite 1A, 17 Southport Street West Leederville
Perth
Western Australia, Australia
6000
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Overview

StagePre-Feasibility
Mine TypeUnderground
Commodities
  • Gold
  • Copper
  • Iron Ore
  • Cobalt
Mining Method
  • Longhole open stoping
  • Paste backfill
Mine Life8 years (as of Jan 1, 2022)
The PFS shows that the Rover 1 Project is commercially viable, and the Board of Castile will now progress the Rover 1 project into a Bankable Feasibility Study (BFS).


Owners

Source: p. 20
CompanyInterestOwnership
Castile Resources Limited 100 % Indirect
Castile Resources Limited is the 100% owner the tenements ELR29957 and ELR29958 containing the Rover 1 Project. Castile also retains 100% ownership of the five other tenements surrounding the Rover 1 Project that make up the Rover Mineral Field.

Contractors

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Deposit Type

  • IOCG


Summary:

The Rover 1 ore system is classified as an Iron-oxide-copper-gold (“IOCG”) style of deposit making it polymetallic in nature with the main minerals of copper and gold existing within a magnetite rich alteration halo. Other by-products of cobalt, silver and bismuth occur with the deposit.

The ore system is a virgin discovery hosted within Paleo-proterozoic meta-sedimentary rocks of the Warramunga Province (Orradidgiee Group). At the Rover 1 site, the host rocks are overlain by a 120-140M sequence of the younger and un-conforming younger sequence of Cambrian-age sedimentary rocks of the West Wiso Basin.

The Rover 1 deposit occurs in a low relief area covered by extensive transported cover lying over approximately 110 metres of flat-lying Cambrian sediments of the Wiso Basin. The basin rocks unconformably overly a Proterozoic basement of the Warramunga Formation which hosts the deposit in the Rover 1 area, consequently, the deposit does not outcrop. Recent dating by the Northern Territory Geological Survey indicates the host rocks are part of the Ooradidgee Group.

The deposit is situated within a sequence of variably altered volcano-sedimentary rocks consisting of interbedded shales, siltstones tuffaceous sandstones and crystal tuff. Alteration grades from distal silica and silica-hematite (historically logged as hematitic shales) to proximal Jasper, quartz-magnetite and magnetite ironstone. Strong late stage chlorite alteration is associated wit ........


Mining Methods

  • Longhole open stoping
  • Paste backfill


Summary:

Mining will occur under an owner operator model due to the life of the project and the opportunity to utilise a modern battery powered haulage fleet, reducing the pollution from the operation, the ventilation requirements and improving the working environment for the underground work force.

The mining method will utilise long hole open stoping with paste fill for two thirds of the stopes. Stope panels have been blocked into three level groups with the lower two levels being completely filled, while the upper level is left open. Further optimisation is expected for the stope filling with the aim of improving costs while maintaining a high extraction rate. Opportunistic waste filling will occur where applicable. Mine access will be via a decline haulage route with 7.2m3 loaders utilised for both development and stope loading. Modern 50t trucks have been sized to cart the material to surface.

Waste accesses was then designed around these stoping blocks, minimising the volume of waste which will need to be extracted. Ventilation and escapeway rises were located on the decline, while ore levels incorporated stockpiles, sumps and other associated development.

Stoping blocks have been designed with a dilution skin of 0.5m on both the footwall and hangingwall. Ore drives have been designed at a standard size of 4.5mW x 4.5mH regardless of ore width. No additional ore dilution factors were considered as part of the study, however a mining recovery fact ........


Crushing and Grinding
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Processing

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Summary:

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Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Gold Metal in doré oz 28,700252,300
Copper Metal t  ......  Subscription required  ......  Subscription required
Iron Ore Concentrate kt  ......  Subscription required  ......  Subscription required
Cobalt Metal t  ......  Subscription required  ......  Subscription required
Gold Equivalent Metal oz  ......  Subscription required
Copper Equivalent Metal t  ......  Subscription required

Operational Metrics:

Metrics
Annual ore mining rate  ......  Subscription required
Annual processing capacity  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
* According to 2022 study.
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Reserves at September 16, 2022:
The Mineral Resource Estimate as shown above utilises a 2.0g/t AuEq cut-off grade for inclusion within the resource.

Ore Reserves: cut-off grade of 2.25g/t Au.

CategoryTonnage CommodityGradeContained Metal
Probable 3.11 Mt Gold 2.02 g/t 201,800 oz
Probable 3.11 Mt Copper 1.52 % 47,400 t
Probable 3.11 Mt Cobalt 0.07 % 2,200 t
Probable 3.11 Mt Iron (magnetite) 22.92 % 713,300 t
Total Resource 5.58 Mt Gold 1.76 g/t 315,200 oz
Total Resource 5.58 Mt Copper 1.49 % 83,200 t
Total Resource 5.58 Mt Cobalt 0.07 % 4,000 t
Total Resource 5.58 Mt Iron (magnetite) 23.2 % 1,295,000 t

Commodity Production Costs:

CommodityAverage
Cash costs Copper Equivalent  ......  Subscription required
Cash costs Gold Equivalent  ......  Subscription required
Total cash costs Copper Equivalent  ......  Subscription required
Total cash costs Gold Equivalent  ......  Subscription required
All-in sustaining costs (AISC) Copper Equivalent  ......  Subscription required
All-in sustaining costs (AISC) Gold Equivalent  ......  Subscription required
Assumed price Iron Ore  ......  Subscription required
Assumed price Cobalt  ......  Subscription required
Assumed price Copper  ......  Subscription required
Assumed price Gold  ......  Subscription required
* According to 2022 study / presentation.
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Operating Costs:

Units2022
UG mining costs ($/t milled) AUD 65 *  
Processing costs ($/t milled) AUD  ......  Subscription required
G&A ($/t milled) AUD  ......  Subscription required
Total operating costs ($/t milled) AUD  ......  Subscription required
* According to 2022 study.
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2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M AUD  ......  Subscription required
Sustaining CapEx $M AUD  ......  Subscription required
UG OpEx $M AUD  ......  Subscription required
Processing OpEx $M AUD 511.2
G&A costs $M AUD 39.1
Total OpEx $M AUD  ......  Subscription required
Royalty payments $M AUD  ......  Subscription required
Gross revenue (LOM) $M AUD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M AUD  ......  Subscription required
After-tax Cash Flow (LOM) $M AUD  ......  Subscription required
Pre-tax NPV @ 6.5% $M AUD  ......  Subscription required
After-tax NPV @ 6.5% $M AUD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Water Supply
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Proposed Heavy Mobile Equipment as of December 5, 2022:
HME TypeSizeQuantity
Drill (long hole) ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
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Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 21, 2023
....................... Subscription required ....................... Subscription required Subscription required Dec 5, 2022
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Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Corporate Presentation 2022
Pre-Feasibility Study Report 2022
Year-end Mineral Reserves 2022
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