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Exploration, evaluation and intangible assets (Tables)
 12 Months Ended
Dec. 31, 2017
Exploration Evaluation And Intangible Assets  
Schedule of exploration, evaluation and intangible assets

(a)The composition and movement of this caption as of the date of the consolidated statements of financial position is presented below:

 

   S/(000) 
      
Cost     
As of January 1, 2016   89,829 
Additions (b)   10,619 
Transfers, note 10   (1,372)
Assets held for distribution, note 1.1   (47,630)
As of December 31, 2016   51,446 
Additions   1,384 
Transfers, note 10   4,419 
      
As of December 31, 2017   57,249 
      
Accumulated amortization     
As of January 1, 2016   7,967 
Additions   451 
As of December 31, 2016   8,418 
Additions   1,437 
Transfers, note 10   509 
      
As of December 31, 2017   10,364 
      
Impairment, note 1.2   33,469 
      
Net value     
As of December 31, 2016   43,028 
      
As of December 31, 2017   13,416