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Exploration in non-operating areas

12 Months Ended

Dec. 31, 2018

Disclosure Of Exploration In Non-Operating Areas [Abstract]

Disclosure Of Exploration In Non-Operating Units [Text Block]

25.

Exploration in non-operating areas

This caption is made up as follows:

		2018				2017				2016
		US$(000)				US$(000)				US$(000)

Services provided by third parties			22,764				5,401				13,629
Personnel expenses			4,830				4,064				3,908
Lands			1,867				1,781				-
Rentals			1,524				1,171				578
Consumption of materials and supplies			1,420				582				768
Other expenses			3,902				5,263				7,706

			36,307				18,262				26,589