| Basis for focus area |
Known barite and Zn production, potential barite reserves, with associated Pb and Sr occurrences. |
| Identified resources |
Identified resources of barite. Historical production of barite and zinc. |
| Production |
This district produced more than 13 million tons of barite from 1900 to the 1990s (Wharton and others, 1969; Rueff, 2003). |
| Status |
Past mining. |
| Estimated resources |
The district contains a remaining estimated 15 million tons of barite reserves (Wharton and others, 1969). |
| Geologic maps |
Gooding (1953), scale 1:62,500; Dake (1925, 1930), scale 1:62,500; Vierrether (2001), scale 1;24,000; Brown (2001a, b, 2002), scale 1:24,000; Middendorf (2001), scale 1:24,000. |
| Geophysical data |
Mostly adequate Rank 1 magnetic and aeroradiometric coverage available; See McCafferty and Johnson (2019), some inadequate rank 5 in northern portion of focus area. |
| Favorable rocks and structures |
Potosi Dolomite, Eminence Dolomite, Gasconade Dolomite. |
| Deposits |
Dresser district; Cadet mine (MRDS dep_id: 10172048), Arnault Branch (MRDS dep_id: 10220758), Keyes Branch (MRDS dep_id: 10148326), Hornsey Brothers mines, Apex mines. |
| Evidence from mineral occurrences |
MRDS; Missouri Geological Survey database Inventory of Mines; Occurrences and Prospects (Missouri Geological Survey, 2021b). |
| Geochemical evidence |
Unknown, may be data in files at the Missouri Geological Survey; known favorable mineralogy. |
| Geophysical evidence |
Combination of gravity with magnetic data. |
| Evidence from other sources |
Drill core and mine information. |
| Cover thickness and description |
Less than 500 feet. |
| Authors |
Cheryl M. Seeger, Warren C. Day. |
| New data needs |
Drill core logs, new 1:24,000 scale geologic maps. Geochemical sampling of mine waste. |
| Geologic mapping and modeling needs |
Modern 1:24,000 scale geologic maps, drill core logs, and 3-D geologic model. |
| Geophysical survey and modeling needs |
Radiometric data useful for areas of exposed Precambrian rocks. |
| Digital elevation data needs |
Lidar needed. |
