Variant of North American Industry Classification System (NAICS) 2022 Version 1.0 for Energy sector

• E - Energy sector
• 21i - E - Mining, quarrying and oil and gas extraction
• 212i - E - Mining and quarrying (except oil and gas)

2122i - E - Metal ore mining

This category comprises the portion on NAICS industry group 2122 'Metal ore mining' that relates to energy industries.