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v3.20.1

Other current and non-current non-financial assets (Tables) | 12 Months Ended
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Dec. 31, 2019
Disclosure of other non-financial assets [Abstract] |
Disclosure of detailed information about other current and non-current non-financial assets [Text Block] | As of December 31, 2019, and December 31, 2018, the detail of other current and non-current assets is as follows:
Other non-financial assets, current |  | As of December 31, ‎ 2019 |  |  | As of December 31, ‎ 2018 |
|  | ThUS$ |  |  | ThUS$ |
Domestic value added tax |  |  | 17,807 |  |  |  | 20,209 |
Foreign value added tax |  |  | 8,566 |  |  |  | 7,211 |
Prepaid mining property |  |  | 1,244 |  |  |  | 1,329 |
Prepaid insurance |  |  | 7,135 |  |  |  | 1,763 |
Other prepayments |  |  | 1,423 |  |  |  | 1,774 |
Refund of value added tax to exporters |  |  | 10,560 |  |  |  | 12,545 |
Other taxes |  |  | 3,213 |  |  |  | 2,800 |
Other assets |  |  | 604 |  |  |  | 341 |
Total |  |  | 50,552 |  |  |  | 47,972 |
Other non-financial assets, non-current |  | As of December 31, ‎ 2019 |  |  | As of December 31, ‎ 2018 |
|  | ThUS$ |  |  | ThUS$ |
Stain development expenses and prospecting expenses (1) |  |  | 18,654 |  |  |  | 26,189 |
Guarantee deposits |  |  | 551 |  |  |  | 712 |
Other assets |  |  | 524 |  |  |  | 638 |
Total |  |  | 19,729 |  |  |  | 27,539 |
1) Reconciliation of changes in assets for exploration and mineral resource evaluation, by type.
Disclosure of reconciliation of changes in assets for exploration and mineral resource evaluation [Text Block] | Movements in assets relating to the exploration and evaluation of mineral resources as of December 31, 2019, 2018 and 2017:
Reconciliation |  | As of December ‎ 31, 2019 |  |  | As of December ‎ 31, 2018 |  |  | As of December ‎ 31, 2017 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Opening balance |  |  | 26,189 |  |  |  | 17,721 |  |  |  | 23,008 |
Change in assets for exploration and evaluation of mineral resources |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  | - |  |  |  | 11,298 |  |  |  | - |
Short-term reclassifications |  |  | (1,311 | ) |  |  | 1,987 |  |  |  | 595 |
Increase (decrease) due to transfers and other charges |  |  | (6,224 | ) |  |  | (4,817 | ) |  |  | (5,882 | )
Total changes |  |  | (7,535 | ) |  |  | 8,468 |  |  |  | (5,287 | )
Final balance |  |  | 18,654 |  |  |  | 26,189 |  |  |  | 17,721 |

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