Deposit data


Cuyuna IF
Manuels River
Bald Knob_carbonate
Bald Knob_oxide
Olympic Peninsula
Blue Jay 
White Oak Mtn
Nova Scotia

Mn Types

Manganese ores occur in four main types in North America.

(1) Primary carbonate (e.g. Molango)

(2) Battery-active oxides (e.g. Molango supergene zone)

(3) BIF-associated (e.g.Cuyuna)

(4) Volcanic-associated (e.g. Autlan)

Molango, in the Mexican state of Hidalgo, is the only signifcant Mn-only commercial deposit. Many smaller deposits were mined up through the Second World War, but they are for the most part exhausted or uneconomic. The Cuyuna iron deposit produces considerable Mn as a by-product. Several small karst-hosted deposits were mined in Nova Scotia in the late 1800s.