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Other current and non-current non-financial assets (Tables)
 12 Months Ended
Dec. 31, 2020
Disclosure of other non-financial assets [Abstract]  
Disclosure of detailed information about other current and non-current non-financial assets [Text Block]
As of December 31, 2020, and December 31, 2019, the detail of “Other Current and Non-current Assets” is as follows:
 
Other non-financial assets, current
 
As of
December 31,
2020
  
As of
December 31,
2019
 
 
 
ThUS$
 
 
ThUS$
 
Domestic Value Added Tax  18,107   17,807 
Foreign Value Added Tax  7,785   8,566 
Prepaid mining licenses  1,025   1,244 
Prepaid insurance  10,307   7,135 
Other prepayments  946   1,423 
Refund of Value Added Tax to exporters  14,316   10,560 
Other taxes  4,499   3,213 
Other assets  414   604 
Total
 
 
57,399
 
 
 
50,552
 
 
Other non-financial assets, non-current
 
As of
December 31,
2020
  
As of
December 31,
2019
 
 
 
ThUS$
 
 
ThUS$
 
Exploration and evaluation expenses (1)  17,883   18,654 
Guarantee deposits  731   551 
Other assets  3,428   524 
Total
 
 
22,042
 
 
 
19,729
 
 
 (1)Reconciliation of changes in assets for exploration and mineral resource evaluation, by type.
Disclosure of reconciliation of changes in assets for exploration and mineral resource evaluation [Text Block]
Movements in assets for the exploration and evaluation of mineral resources as of December 31, 2020, and December 31, 2019:
 
 
Conciliation
 
As of
December 31,
2020
  
As of
December 31,
2019
  
As of
December 31,
2018
 
 
 
ThUS$
 
 
ThUS$
 
 
ThUS$
 
Opening balance
 
 
18,654
 
 
 
26,189
 
 
 
17,721
 
Change in assets for exploration and evaluation of mineral resources
            
Additions  -   -   11,298 
Short term reclassifications  (526)  (1,311)  1,987 
Increase (decrease) due to transfers and other charges  (245)  (6,224)  (4,817)
Total changes
 
 
(771
)
 
 
(7,535
)
 
 
8,468
 
Total
 
 
17,883
 
 
 
18,654
 
 
 
26,189