Overview
| Stage | Pre-Feasibility |
| Mine Type | Underground |
| Commodities |
|
| Mining Method |
- Longhole open stoping
- Paste backfill
|
| Mine Life | 8 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). |
Source:
p. 20
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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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 ........
Source:
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Flow Sheet:
Summary:
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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.
| Category | Tonnage | Commodity | Grade | Contained 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
|
Source:
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