Skip to main content
RI-24 Manganese Resources of the Cuyuna Range, East-Central Minnesota
Beltrame, R.J.; Holtzman, Richard C.; Wahl, Timothy E. (Minnesota Geological Survey, 1981)
 

Title 
RI-24 Manganese Resources of the Cuyuna Range, East-Central Minnesota

Issue Date
1981

Publisher
Minnesota Geological Survey

Type
Report

Abstract
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.

Appears in Collection(s)

Other Identifier(s)
issn: 0076-9177

Series/Report Number
RI
24

Suggested Citation
Beltrame, R.J.; Holtzman, Richard C.; Wahl, Timothy E.. (1981). RI-24 Manganese Resources of the Cuyuna Range, East-Central Minnesota. Minnesota Geological Survey. Retrieved from the University of Minnesota Digital Conservancy, http://purl.umn.edu/60460.


Content distributed via the University of Minnesota's Digital Conservancy may be subject to additional license and use restrictions applied by the depositor.