Manganese resources of the Cuyuna range, east-central Minnesota. Report of Investigations 24

Technical Report · Thu Jan 01 00:00:00 EST 1981

OSTI ID:5623496

Beltrame, R J; Holtzman, R C; Wahl, T E

The Cuyuna range, located in east-central Minnesota, consists of a sequence of argillite, siltstone, iron-formation, graywacke, slate, and quartzite of early Proterozoic age. Manganese-bearing materials occur within the iron-rich strata of the Trommald Formation and the Rabbit Lake Formation. Computer-assisted resource estimates, based on exploration drill hole information, indicate that the Cuyuna range contains a minimum of 176 million metric tons (MMT) of marginally economic manganiferous rock with an average grade of 10.46 weight percent manganese. The calculated 18.5 MMT of manganese on the Cuyuna range could supply this country's needs for this important and strategic metal for nearly 14 years. An additional resource of 6.9 MMT of manganese metal is available in the lower grade deposits. The vast majority of these calculated resources are extractable by current surface mining techniques.

• Research Organization: Minnesota Univ., St. Paul (USA)
• OSTI ID: 5623496
• Report Number(s): NP-2902475; ON: DE82902475
• Country of Publication: United States
• Language: English

Related Subjects

29 ENERGY PLANNING
POLICY AND ECONOMY
58 GEOSCIENCES
MANGANESE
MINERAL RESOURCES
GEOLOGY
MINNESOTA
SPATIAL DISTRIBUTION
DISTRIBUTION
ELEMENTS
GREAT LAKES REGION
METALS
NORTH AMERICA
RESOURCES
TRANSITION ELEMENTS
USA
290400* - Energy Planning & Policy- Energy Resources
580100 - Geology & Hydrology- (-1989)