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EXPLORATION AND EVALUATION ASSETS
 12 Months Ended
Dec. 31, 2022
Text block [abstract]  
EXPLORATION AND EVALUATION ASSETS
6.
EXPLORATION AND EVALUATION ASSETS
 
(a)
Rook I Project
The Rook I Project is located in Northern Saskatchewan, approximately 40 kilometres (km) east of the Saskatchewan – Alberta border, approximately 150 km north of the town of La Loche and 640 km northwest of the City of Saskatoon and consists of
32
contiguous mineral claims totaling
35,065
hectares.
The Rook I Project hosts the 100% owned Arrow deposit
discovered by NexGen
 in February 2014, the Bow discovery in March 2015, the Harpoon discovery in August 2016 and the Arrow South discovery in July 2017. During the year ended December 31, 2021, the Company filed a feasibility study for the Rook I Project.
NexGen has a 100% interest in the claims subject only to: (i) a 2% net smelter return royalty (“NSR”); and (ii) a 10%
production carried interest, in each case, only on claims S-113928 to S-113933, which are north, east, and outside of the Arrow deposit.
 The NSR may be reduced to 1% upon payment of $1 million. The 10% production carried interest provides for the owner to be carried to the date of commercial production.
 
(b)
Other Athabasca Basin Properties
The Other Athabasca Basin Properties are a portfolio of early-stage mineral properties in the Athabasca Basin. The properties are grouped geographically as “SW1”, “SW2” and “SW3”. The SW2 properties are held directly by NexGen. The SW1 and SW3 properties are held by NXE Energy SW1 Ltd. and NXE Energy SW3 Ltd., respectively, each a wholly owned subsidiary.
 
(c)
IsoEnergy Properties
The IsoEnergy Properties consist of the following properties located in the Athabasca region of Saskatchewan: (i) a 100% interest in the Radio Project, Saskatchewan (subject to a 2% NSR and 2% gross overriding royalty on diamonds); (ii) a 100% interest in the Thorburn Lake Project (subject to a 1% NSR and a 10% carried interest which can be converted to a 1% NSR at the holder’s option upon completion of a bankable feasibility study); (iii) a 100% interest, in each of the Madison, 2Z, Carlson Creek and North Thorburn properties, Saskatchewan; (iv) a 100% interest in the Geiger property; (v) a 100% interest in the Larocque East property that constitutes 18,980 hectares and includes the Hurricane Zone; (vi) a 100% interest in the Evergreen Property that constitutes 35,362 hectares; and (vii) a portfolio of staked claims in Saskatchewan, all of which are early stage exploration properties.
 
 
    
Rook I
Other Athabasca
Basin Properties
           
IsoEnergy
Properties
  
Total
  
Acquisition cost
                                      
Balance at December 31, 2021
  
$
235
      
 
 
 
 
 
 
 
 
 
 
$
 
1,458
 
        
$
 
 
 
26,660
  
 
 
 
 
 
 
$
28,353
 
Additions
  
 
-
      
 
-
 
        
 
10
  
 
10
 
Dispositions
  
 
-
      
 
-
 
        
 
(42)
  
 
(42)
 
Balance as at December 31, 2022
  
$
235
      
 
 
 
 
 
 
 
 
 
 
$
1,458
 
        
$
 
 
 
26,628
  
 
 
 
 
 
 
$
28,321
 
             
Deferred exploration costs
                                      
Balance at December 31, 2021
  
$
260,941
      
 
 
 
 
 
 
 
 
 
 
$
9,180
 
        
$
 
 
 
28,069
  
 
 
 
 
 
 
$
298,190
 
Additions:
                                      
General exploration and drilling
  
 
7,705
      
 
-
 
        
 
5,613
  
 
13,318
 
Environmental, permitting, and engagement
  
 
12,005
      
 
-
 
        
 
-
  
 
12,005
 
Technical, engineering and design
  
 
32,703
      
 
-
 
        
 
-
  
 
32,703
 
Geochemistry and assays
  
 
-
      
 
-
 
        
 
190
  
 
190
 
Geological and geophysical
  
 
1,941
      
 
423
 
        
 
1,593
  
 
3,957
 
Labour and wages
  
 
8,818
      
 
-
 
        
 
836
  
 
9,654
 
Share-based payments (Note 11)
  
 
4,532
      
 
-
 
        
 
1,832
  
 
6,364
 
Travel
  
 
367
      
 
-
 
        
 
178
  
 
545
 
Total Additions
  
 
68,071
      
 
423
 
        
 
10,243
  
 
78,737
 
Balance as at December 31, 2022
  
$
329,012
      
 
 
 
 
 
 
 
 
 
 
$
9,603
 
        
$
 
 
 
38,312
  
 
 
 
 
 
 
$
376,927
 
Total costs, December 31, 2022
  
$
    329,247
      
 
 
 
 
 
 
 
 
 
 
$
    11,061
 
        
$
 
 
 
    64,940
  
 
 
 
 
 
 
$
    405,248
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
Rook I
Other Athabasca
Basin Properties
           
IsoEnergy
Properties
  
Total
  
Acquisition cost
                                      
Balance at December 31, 2020
   $ 235      
 
 
 
 
 
 
 
 
 
 
$		 1,458           $ 26,778  
 
 
 
 
 
$		 28,471  
Additions
     -         -             27     27  
Dispositions
     -         -             (145)     (145)  
Balance as at December 31, 2021
  
$
235
      
 
 
 
 
 
 
 
 
 
 
$
1,458
 
        
$
26,660
  
 
 
 
 
 
$
28,353
 
             
Deferred exploration costs
                                      
Balance at December 31, 2020
     216,350         9,173             20,728     246,251  
Additions:
                                      
General exploration and drilling
     6,502         -             3,615     10,117  
Environmental, permitting, and engagement
     15,154         -             2     15,156  
Technical, engineering and design
     13,893         -             1     13,894  
Geochemistry and assays
     -         -             333     333  
Geological and geophysical
     116         7             775     898  
Labour and wages
     4,925         -             815     5,740  
Share-based payments (Note 11)
     3,696         -             1,561     5,257  
Travel
     305         -             239     544  
Total Additions
     44,591         7             7,341     51,939  
Balance as at December 31, 2021
  
$
260,941
      
 
 
 
 
 
 
 
 
 
 
$
9,180
 
        
$
28,069
  
 
 
 
 
 
$
298,190
 
Total costs, December 31, 2021
  
$
    261,176
      
 
 
 
 
 
 
 
 
 
 
$
    10,638
 
        
$
    54,729
  
 
 
 
 
 
$
    326,543