| Basis for focus area |
Known Mississippi Valley-type deposits with Pb, Zn, and barite production, and Sr occurrences. |
| Identified resources |
Historical production of barite, lead, and zinc. |
| Production |
Lead with minor Zn were the major products until 1910; following 1910 barite was produced with lead and zinc as byproducts. This district produced more than 400,000 tons barite (Wharton and others, 1969). |
| Status |
Past mining. |
| Estimated resources |
Unknown; barite contains up to 2% strontium. |
| Geologic maps |
Middendorf (2003), scale 1:500,000. |
| Geophysical data |
Inadequate Rank 4 and 5 aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Cambrian, Ordovician, Mississippian carbonates. |
| Deposits |
Blue Jack mine (MRDS dep_id: 10184422), Crystal mine, C. Weber mine, Ford-Grey mine (MRDS dep_id: 10147885), Goller No. 3 mine (MRDS dep_id: 10147044), Hincke-White No. 1 mine. |
| 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 |
No data. |
| Evidence from other sources |
Drill core and mine information. |
| Cover thickness and description |
Less than 1000 feet. |
| Authors |
Cheryl M. Seeger. |
| New data needs |
Drill core logs, new 1:24,000 scale geologic mapping. Geochemical sampling of mine waste. |
| Geologic mapping and modeling needs |
Modern 1:24,000 scale geologic mapping, drill core logs, and 3-D geologic modeling. |
| Geophysical survey and modeling needs |
None-high resolution aeromagnetic and aeroradiometric coverage complete. |
| Digital elevation data needs |
Lidar QL2 over part of the focus area; in progress and inadequate in other parts. |
