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Other current and non-current non-financial assets | 12 Months Ended
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Dec. 31, 2017
Disclosure of other non-financial assets [Abstract] |
Disclosure of other non-financial assets [Text Block] | Note 23 Other current and non-current non-financial assets As of December 31, 2017, and December 31, 2016, the detail of other current and non-current assets is as follows:
Other non-financial assets, current |  | 12/31/2017 |  | 12/31/2016 |
|  | ThUS$ |  | ThUS$ |
Domestic Value Added Tax |  |  | 7,488 |  |  | 13,999 |
Foreign Value Added Tax |  |  | 5,122 |  |  | 2,537 |
Prepaid mining licenses |  |  | 1,205 |  |  | 1,136 |
Prepaid insurance |  |  | 2,446 |  |  | 6,323 |
Other prepayments |  |  | 1,443 |  |  | 408 |
Refund of Value Added Tax to exporters |  |  | 4,937 |  |  | 855 |
Other taxes |  |  | 4,027 |  |  | 4,660 |
Other assets |  |  | 215 |  |  | 355 |
Total |  |  | 26,883 |  |  | 30,273 |
Other non-financial assets, non-current |  | 12/31/2017 |  | 12/31/2016 |
|  | ThUS$ |  | ThUS$ |
Stain development expenses and prospecting expenses (1) |  |  | 17,721 |  |  | 23,008 |
Guarantee deposits |  |  | 771 |  |  | 685 |
Other assets |  |  | 770 |  |  | 997 |
Total |  |  | 19,262 |  |  | 24,690 |
| 1) | Reconciliation of changes in assets for exploration and mineral resource evaluation, by type
Movements in assets for the exploration and evaluation of mineral resources as of December 31, 2017, and December 31, 2016:
Reconciliation |  | 12/31/2017 |  | 12/31/2016 |
|  | ThUS$ |  | ThUS$ |
Opening balance |  |  | 23,008 |  |  | 31,911 |
Changes |  |  |  |  |  |  |
Additions, other than business combinations |  |  | - |  |  | - |
Depreciation and amortization |  |  | (5,440) |  |  | (9,498) |
Increase (decrease) due to transfers and other charges |  |  | 153 |  |  | 595 |
Total changes |  |  | (5,287) |  |  | (8,903) |
Total |  |  | 17,721 |  |  | 23,008 |
As of the presentation date, no reevaluations of assets for exploration and assessment of mineral resources have been conducted.

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