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Stockpiles and ore on leach pads, net

12 Months Ended

Dec. 31, 2021

Minera Yanacocha SRL and subsidiary [Member]

Disclosure of stockpiles and ore on leach pads [Line Items]

Stockpiles and ore on leach pads, net

8.     Stockpiles and ore on leach pads, net

(a) This caption is made up as follows:

​

​	​	​	​	​
​		2021		2020
​	​	US$(000)	​	US$(000)
​	​	​	​	​
Current portion -
Stockpiles		—		7,363
Ore on leach pads		111,358		124,364
Net realizable value adjustment (b)		(1,259)		(10,212)
​	​	​	​	​
​		110,099		121,515
​	​	​	​	​
Non-current portion -
Stockpiles		39,627		33,088
Ore on leach pads		44,546		39,674
Net realizable value adjustment (b)		—		(3,075)
​	​	​	​	​
​		84,173		69,687

​

(b) The provision for net realizable value adjustment had the following movement during the years 2021, 2020 and 2019:

​

​	​	​	​	​	​	​
​		2021		2020		2019
​	​	US$(000)	​	US$(000)	​	US$(000)
​	​	​	​	​	​	​
Opening balance, note 19		13,287		47,925		62,540
Provision		14,137		37,880		90,365
Reversal of provision		(26,165)		(72,518)		(63,778)
​	​	​	​	​	​	​
Ending balance, note 19		1,259		13,287		89,127

​

Provision reversals correspond to improvements of the overall long-term market conditions that reduced the gap between stockpiles and leach pads’ cost and their net realizable value.

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