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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 |

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