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Assets held for sale (Tables)
 12 Months Ended
Dec. 31, 2020
Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract]  
Disclosure of detailed information about available for sale noncurrent assets [Text Block]
The following table shows the movements in assets held for sale:
 
Assets held for sale
 
As of
December 31,
2020
  
As of
December 31,
2019
 
 
 
ThUS$
 
 
ThUS$
 
Land  1,493   2,454 
Mining rights  136   - 
Total assets held for sale
 
 
1,629
 
 
 
2,454