| Basis for focus area |
Area in eastern Brown County that encompasses multiple MRDS barite and strontium entries. |
| Identified resources |
Historical production of strontium (celestite) in 1940s, but accurate data are not available. Some celestite deposits contain as much as 10 to 12% barite. |
| Production |
Small quantities of celestite were produced from Brown County during the late 1930s and early 1940s. |
| Status |
Past mining. |
| Estimated resources |
No data. |
| Geologic maps |
Cheney and Eargle (1951), scale 1:63:360; Kier and others (1976), scale 1:250,000. |
| Geophysical data |
Rank 4 aeromagnetic coverage; Rank 5 aeroradiometric coverage. |
| Favorable rocks and structures |
Bedded celestite and barite deposits are hosted by the Glen Rose Formation of the Trinity Group. |
| Deposits |
Alpha Baker mine (MRDS dep_id: 10062614), Boyd mine (MRDS dep_id: 10062613), Miller mine (MRDS dep_id: 10062610), many occurrences listed in MRDS. |
| Evidence from mineral occurrences |
MRDS. |
| Geochemical evidence |
Grade of the deposits are 70 to 85% SrSO4. |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
Unknown. |
| Comments |
Most of the celestite produced in Texas was used as a weighting agent in rotary-drilling fluids. |
| Cover thickness and description |
Mineralization exposed at the surface. |
| Authors |
Laurel G. Woodruff. |
| New data needs |
Geochemistry, geologic mapping, geophysics. |
| Geologic mapping and modeling needs |
Geologic mapping. |
| Geophysical survey and modeling needs |
High resolution geophysical coverage needed. |
| Digital elevation data needs |
Lidar complete. |
