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Characterization of Boracite Group Minerals Associated With the Subsurface Evaporite Formations in an Eight-county Area of East- central Mississippi and West-Central Alabama.

Sundeen DA
For Reference Only At Bureau Libraries :40 pages
The occurrence of boracite (mg3b7o13cl) and other boron-bearing minerals in the Gulf Coast Salt Basin has been reported in Clarke County, southwestern Alabama, in Smith County, south-central Mississippi, and in Wayne County, Mississippi. A larger area encompassing sites with widespread drilling activity was selected to do a detailed study of all available cuttings and cores taken from oil wells drilled into the louann salt. An area including Clarke, Jasper, Jones, and Smith Counties in Mississippi was proposed. The objectives of this study were (1) to determine which types of boron- bearing minerals are present in this larger area, (2) to determine their crystal habits and other physical properties, and (3) to gather data establishing whether or not these minerals are omnipresent or are only a localized phenomenon at this stratigraphic horizon. To date, 192 wells have been drilled to the Louann Salt formation in the four-county study area. Most of the wells were drilled to depths of 12,000 to 18,000 ft. Boracite samples were not as abundant in the four-county area as they were in Wayne County. Only 5 wells out of 78 examined yielded samples for study. Boracite was the only boron-bearing mineral retrieved successfully. The apparent consistent occurrence of boron-bearing minerals in the study area suggests that their presence may be pervasive at the top of the Louann Salt throughout the entire salt basin.
Publication Date
Document Type
CP; Final Contract Report;
Fiscal Year
Identifying No.
OFR 38-92
NIOSH Division
Source Name
For Reference Only At Bureau Libraries
Performing Organization
Univ. of Southern Mississippi
Page last reviewed: December 30, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division