Petrographic characterization of Kentucky coals. Final report. Part IV. A petrographic and chemical model for the evolution of the Tradewater Formation coals in Western Kentucky [electronic resource].
- Lexington, Ky. : University of Kentucky, 1984.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: 146 : digital, PDF file
- Additional Creators:
- University of Kentucky
United States. Department of Energy. Office of Scientific and Technical Information
- A depositional model for the coals of the Tradewater Formation and associated rock units was constructed as a predictive device for the occurrence of economically important low sulfur coal. Twenty-one cores were examined and ninety-eight coal samples were analyzed for maceral, ash, and sulfur contents. These data were then analyzed to determine regional variation as well as vertical variation in single coal columns. Core data indicate that the majority of the Tradewater rocks consist of irregularly distributed, coarsening-upward, fine-grained detrital material which was deposited in shallow bodies of water. Minor fossiliferous shales and limestones suggest a marine influence. Less common coarse-grained, fining-upward sequences appear to be deposits of meandering channels. Like the detrital rocks, the coal seams are also irregularly distributed and exhibit variable petrographic and chemical properties reflecting changes in the Eh and pH of the coal swamp waters as well as detrital influx into the swamps. These swamps were relatively limited in extent and probably occupied the upper reaches of the tidal zone. The lack of significant stratigraphic and geographic trends in the regional data suggests that this mode of deposition was widespread and continued for a long period of time. 42 references, 19 figures, 9 tables.
- Published through SciTech Connect.
Hower, J.C.; Graese, A.M.; Ferm, J.C.
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