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Exploration in operating units (Tables)

12 Months Ended

Dec. 31, 2020

Exploration in operating units

Schedule of detailed information about exploration and evaluation assets

This caption is made up as follows:


		2020		2019		2018
		US$(000)		US$(000)		US$(000)

Beginning balance of finished goods and products in process, net of depreciation and amortization		444		2,837		5,157

Services provided by third parties		20,406		33,591		71,513
Direct labor		3,361		1,747		2,349
Purchase of land		2,162		—		—
Consumption of materials and supplies		1,426		3,712		8,594
Short-term and low-value lease		766		1,186		2,065
Electricity and water		471		905		1,337
Transport		12		71		192
Maintenance and repair		9		10		450
Other minor		283		548		910
Total exploration in operating units		28,896		41,770		87,410
Final balance of products in process and finished goods, net of depreciation and amortization		(1,296)		(444)		(2,837)

		28,044		44,163		89,730