Mineralogy of selected lignitic coal overburdens of the Wilcox Group in east Texas
Lignite overburden core samples obtained in the premining stage were size-fractionated and analyzed by x-ray diffraction and chemical methods to determine their mineralogical composition. Although we found a broad similarity in crystalline mineral assemblage in these fluvial sediments from east Texas, we also observed wide variations in the distribution of smectite, kaolinite, mica, vermiculite, and chlorite, with sample location and depth. Electron microscopic investigations indicated that localized concentrations of siderite were probably authigenic in origin. The physicochemical properties and mineralogical composition data obtained in these investigations suggest that segregation of existing low-fertility surface soils for top-dressing may be unnecessary provided that pyrite-rich spoil material and clayey substrata are not deposited in the upper soil zone. 15 references, 6 figures, 3 tables.
- Research Organization:
- Texas A and M Univ., College Station
- OSTI ID:
- 5916629
- Journal Information:
- Soil Sci.; (United States), Journal Name: Soil Sci.; (United States) Vol. 137:4; ISSN SOSCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010900* -- Coal
Lignite
& Peat-- Environmental Aspects
510500 -- Environment
Terrestrial-- Site Resource & Use Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
BROWN COAL
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
CHEMICAL PROPERTIES
COAL
COAL MINES
COHERENT SCATTERING
DATA
DIFFRACTION
ENERGY SOURCES
EXPERIMENTAL DATA
FEDERAL REGION VI
FOSSIL FUELS
FUELS
INFORMATION
LAND RECLAMATION
LIGNITE
MATERIALS
MINERALOGY
MINES
NORTH AMERICA
NUMERICAL DATA
OVERBURDEN
PHYSICAL PROPERTIES
SAMPLING
SCATTERING
TEXAS
UNDERGROUND FACILITIES
USA
X-RAY DIFFRACTION