XML 31 R17.htm IDEA: XBRL DOCUMENT v3.19.1
Stockpiles and ore on leach pads, net
 12 Months Ended
Dec. 31, 2018
Minera Yanacocha SRL and subsidiary [Member]  
Disclosure of stockpiles and ore on leach pads [Line Items]  
Disclosure of stockpiles and ore on leach pads [Text Block]
8.
Stockpiles and ore on leach pads, net
 
 
(a)
This caption is made up as follows:
 
 
 
2018
 
 
2017
 
 
 
US$(000)
 
 
US$(000)
 
 
 
 
 
 
 
 
Current portion -
 
 
 
 
 
 
 
 
Stockpiles
 
 
35,065
 
 
 
77,296
 
Ore on leach pads
 
 
106,931
 
 
 
159,930
 
Provision for net realizable value adjustment (b)
 
 
(41,403
)
 
 
(40,588
)
 
 
 
 
 
 
 
 
 
 
 
 
100,593
 
 
 
196,638
 
 
 
 
 
 
 
 
 
 
Non-current portion -
 
 
 
 
 
 
 
 
Stockpiles
 
 
41,814
 
 
 
32,362
 
Ore on leach pads
 
 
144,688
 
 
 
50,350
 
Provision for net realizable value adjustment (b)
 
 
(47,724
)
 
 
(21,952
)
 
 
 
 
 
 
 
 
 
 
 
 
138,778
 
 
 
60,760
 
 
 
(b)
The provision for net realizable value adjustment had the following movement during the years 2018, 2017 and 2016:
 
 
 
2018
 
 
2017
 
 
2016
 
 
 
US$(000)
 
 
US$(000)
 
 
US$(000)
 
 
 
 
 
 
 
 
 
 
 
Opening balance, note 17
 
 
62,540
 
 
 
84,374
 
 
 
90,298
 
Provision
 
 
90,365
 
 
 
77,385
 
 
 
100,179
 
Reversal of provision
 
 
(63,778
)
 
 
(99,219
)
 
 
(106,103
)
 
 
 
 
 
 
 
 
 
 
 
 
 
Ending balance, note 17
 
 
89,127
 
 
 
62,540
 
 
 
84,374