High-silica resources in Augusta, Bath, Highland, and Rockbridge counties, Virginia
Sweet PC. 1981. High-silica resources in Augusta, Bath, Highland, and Rockbridge counties, Virginia. Virginia Division of Mineral Resources Publication. No. 32. Charlottesville, Virginia
The principal high-silica resources of Augusta, Bath, Highland, and Rockbridge counties in the central Valley and Ridge Province of Virginia are in the Antietam and Tuscarora formations, and the Keefer and Ridgeley sandstones. Physical descriptions, sieve analyses, and chemical test data are presented so that the commercial potential of high-silica resources can be evaluated. Composite samples from each of the principal resource units at selected localities were analyzed for silica content in a raw or unbeneficiated condition; silica content of the units ranges from 97.2 to 99.1 percent. The percentage of silica in beneficiated samples ranges from 98.9 to 99.5 percent for the same samples. A general decrease in percentage of Al2 O3 and Fe2 O3 upon simple beneficiation indicates that some clay and silt-size particles and some iron-oxide on the quartz grains were effectively removed. Grain-size distribution, average grain size, and degree of sorting for most samples is shown by histograms and cumulative frequency curves.--Journal abstract.
- Type
- Published Report
- Authors
- Sweet, Palmer
- Date of Issue
- 1981
- Units
- SHEN
- Keywords
- Antietam Formation, Augusta County, Bath County, Eastern U.S., Economic Geology, GRBIB, Highland County, Keefer Sandstone, Monographic, Resources, Ridgeley Sandstone, Rockbridge County, sands, Serial, SHEN, Shenandoah National Park VA, Southeastern U.S., Tuscarora Formation, United States, Virginia