Manganese in Igneous Rocks

Region Central, South Central
Mineral systems
Deposit types
Critical minerals
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Focus area of known manganese mineralization.
Identified resources Historical production of manganese.
Production Unknown.
Status Past mining.
Estimated resources No estimated resource data.
Geologic maps Pratt and others (1992), scale 1:250,000.
Geophysical data Adequate Rank 1 magnetic and aeroradiometric coverage available over southeast Missouri; See McCafferty and others (2019).
Favorable rocks and structures 1.4 Ga felsic volcanic rocks and hypabyssal andesite-dacite intrusions.
Deposits Deposits and occurrences in Missouri Geological Survey database Inventory of Mines, Occurrences, and Prospects database (Missouri Geological Survey, 2021b).
Evidence from mineral occurrences Missouri Geological Survey database Inventory of Mines; Occurrences and Prospects (Missouri Geological Survey, 2021b).
Geochemical evidence Known favorable mineralogy.
Geophysical evidence No data.
Evidence from other sources Drill core and mine information.
Cover thickness and description Less than 500 feet.
Authors Cheryl M. Seeger, Trevor Ellis.
New data needs Drill core logs, new 1:24,000 scale geologic maps.
Geologic mapping and modeling needs Considerable mapping exists but more could be done to pin down vent locations and hydrothermal systems.
Geophysical survey and modeling needs High resolution geophysical aeromagnetic and aeroradiometric coverage.
Digital elevation data needs Lidar mostly adequate; few small areas inadequate.