Geological and geophysical expenses (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure Of Geological and geophysical expenses [Abstract]

Disclosure of detailed information about geological and geophysical expenses [text block]

Amounts in US$ '000	2017		2016		2015
Staff costs (Note 11)		10,525		9,541		10,557
Share-based payment (Notes 11)		501		898		779
Allocation to capitalised project		(6,402)		(2,119)		(598)
Other services		3,070		1,962		3,093
		7,694		10,282		13,831