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Financial Income (Tables)
12 Months Ended
Dec. 31, 2018
Financial Income [Abstract]  
Disclosure of detailed Information About Finance Income [Table Text Block]
This item is made up as follows:
 
 
 
For the year ended

December 31, 2018
 
 
For the year ended

December 31, 2017
 
 
For the year ended
December 31, 2016
 
 
 
US$(000)
 
 
US$(000)
 
 
US$(000)
 
 
 
 
 
 
 
 
 
 
 
Special Mining Burden (GEM) (a)
 
 
18,574
 
 
 
-
 
 
 
-
 
Other financial income
 
 
9,515
 
 
 
5,350
 
 
 
954
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
28,089
 
 
 
5,350
 
 
 
954
 
 
 
(a)
Represents interest related to the GEM refund from the period October 2012 through December 2013 of US$18.6 million (see note 13(d)).