Overview
Stage | Permitting |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Transverse stoping
- Longitudinal stoping
- Longhole stoping
- Cemented paste backfill
|
Mine Life | 11 years (as of Jan 1, 2021) |
Source:
p. 23
The Property consists of 32 contiguous mineral claims with a total area of 35,065 ha. All claims are 100% owned by NexGen.
Contractors
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Deposit Type
- Unconformity related
- Vein / narrow vein
- Hydrothermal
- Replacement
- Breccia pipe / Stockwork
Summary:
The Arrow Deposit is considered to be an example of a basement-hosted, vein-type uranium deposit.
Mineralization occurs at the following seven locations on the property and is exclusively hosted in basement lithologies below the unconformity within the Athabasca Group.
• Arrow Deposit
• South Arrow Discovery
• Harpoon occurrence
• Bow occurrence
• Cannon occurrence
• Camp East occurrence
• Area A occurrence
Arrow Deposit
The Arrow Deposit is thought to be hosted in quartz-feldspar-garnet-biotite (± graphite) gneisses that are predominantly silicified. They consist of garnet porphyroblast pseudomorphs, which are now almost exclusively altered to chlorite, hematite, illite, or sudoite. Other minor mineral phases present include plagioclase, potassium feldspar, biotite, muscovite, and amphibole, in varying concentrations. Additionally, the Arrow Deposit is also marked by the presence of intermediate orthogneisses consisting of quartz monzodioritic to quartz dioritic gneiss with tonalitic, granodioritic, and granitic gneiss. The main foliation present in the Arrow Deposit area trends towards the northeast and has vertical to sub-vertical dips. Hydrothermal alteration that occurs in the vicinity of the Arrow Deposit is extensive and several distinct styles have been observed:
• Quartz–sericite–sudoite–illite alteration
- A pervasive alteration assemblage that nearly completely replaces the host rock, although ........
Mining Methods
- Transverse stoping
- Longitudinal stoping
- Longhole stoping
- Cemented paste backfill
Summary:
Access to the UG Arrow Deposit will be via two shafts: an 8.0 m diameter ProductionShaft for intake air, and a 5.5 m diameter Exhaust Shaft for return ventilation and second egress. Access to the mine will be via the Production Shaft, with mine access shaft stations on the 500 Level and 590 Level, and a loading pocket shaft station on the 620 Level. Levels will be spaced 30 m apart UG and will be connected via an internal ramp.
For production mining, a combination of transverse and longitudinal longhole stoping approaches will be used to extract the Mineral Resource.
Longhole stoping is generally associated with steeply dipping ore bodies. Longhole stoping requires dividing the targeted Mineral Resource into individual stopes, and establishing mining levels to access the stopes and position development to facilitate drilling, blasting, and extraction of the material. Once extraction of material within a stope is completed, the stope will be filled with paste backfill. The transverse approach consists of primary and secondary stopes and is generally applied to areas where the average true thickness (perpendicular to dip) of the Mineral Resource is greater than 10 m. For areas where the true thickness is less than 10 m, the longitudinal approach will be applied. Generally, the approach selected will be modified to best suit surrounding mine areas.
The level interval for production stoping was first analyzed at the Project onset based on the bl ........
Source:
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Flow Sheet:
Summary:
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Projected Production:
Commodity | Units | Avg. Annual | LOM |
Uranium
|
M lbs
| 22 | 234 |
All production numbers are expressed as yellow cake.
Operational Metrics:
Metrics | |
Daily ore mining rate
| ...... |
Daily mining capacity
| ...... |
Daily processing capacity
| ...... |
Annual production capacity
| ...... |
Annual processing capacity
| ...... |
Ore tonnes mined, LOM
| ...... |
Tonnes processed, LOM
| ...... |
* According to 2021 study.
Reserves at January 21, 2021:
Mineral Reserves: Stopes were estimated at a cut-off grade of 0.30% U3O8.
Mineral Resources are reported at a cut-off grade of 0.25% U3O8.
Mineral Resources are reported inclusive of Mineral Reserves.
Category | Tonnage | Commodity | Grade | Contained Metal |
Probable
|
4,574 kt
|
U3O8
|
2.37 %
|
239.6 M lbs
|
Measured
|
2,183 kt
|
U3O8
|
4.35 %
|
209.6 M lbs
|
Indicated
|
1,572 kt
|
U3O8
|
1.36 %
|
47.1 M lbs
|
Measured & Indicated
|
3,754 kt
|
U3O8
|
3.1 %
|
256.7 M lbs
|
Inferred
|
4,399 kt
|
U3O8
|
0.83 %
|
80.7 M lbs
|
Corporate Filings & Presentations:
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