| Basis for focus area |
Pb-Zn-Cu sulfide ores with substantial Ag, Co, and Ni are produced Viburnum Trend mines. District currently active. Several past-producing mines now closed. Lead is more abundant than zinc. |
| Identified resources |
Historical and current production of copper, lead, silver, and zinc. |
| Production |
Historical production of at least 7.6 Mst Pb, more than 1 Mst Zn, and some Cu. Cobalt circuit is present, but production data not reported by Doe Run Company. Cobalt also in mine waste. |
| Status |
Past mining and current Pb mining continues for the Viburnum Trend. Also a secondary recovery lead smelter recycling lead-containing waste. |
| Estimated resources |
Resources confidential, district currently active. |
| Geologic maps |
Grenia (1960), scale 1:62,500; Hayes (1960), scale 1:62,500; Erickson (1950), scale 1:62,500. |
| Geophysical data |
Adequate Rank 1 magnetic and aeroradiometric data available (McCafferty and Johnson, 2019). |
| Favorable rocks and structures |
Bonneterre Formation. |
| Deposits |
Magmont mine (MRDS dep_id: 10073171), Buick mine (MRDS dep_id: 10244067), Brushy Creek, West Fork, Fletcher (MRDS dep_id: 10172109), Sweetwater mines, Viburnum numbers 27, 28, 29 and 35 (Casteel) mines (MRDS dep_id: 10123215). |
| 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 |
Drilling has defined the ore bodies. |
| Comments |
Lower priority for new mapping compared to the Old Lead Belt/Fredericktown districts of Missouri. |
| Cover thickness and description |
900-1,400 ft. |
| Authors |
Cheryl M. Seeger, Warren C. Day. |
| New data needs |
Analyze the waste piles for Co. |
| Geologic mapping and modeling needs |
Analyze the waste piles for cobalt. New surface geologic mapping may not be critical, unless needed for structure; 3D modeling based on drill hole data would delineate ore bodies, but data availability will be an issue. However, extensive core from Magmont mine in Missouri Geological Survey core repository. |
| Geophysical survey and modeling needs |
Explore use of EM; airborne magnetic data recently acquired. |
| Digital elevation data needs |
Lidar adequate. |
