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- W2341115132 abstract "The Eastern Kentucky Coal Field has been, and continues to be, a major source of high quality coal for electric utilities, and the steel industry` Economical coal resources are primarily confined to the Breathitt Formation, which contains more than 100 named coal beds. Analyses of over 1,500 samples show these beds to average 10.7 percent ash, and 1.7 percent sulfur. These values are not spatially or temporally uniform, however. A stratigraphic comparison of eight major economical coal beds/zones shows average ash yields to increase, and become more variable, in younger coals. This trend may be related to the increased occurrence of coal splitting in younger coals, with otherwise low ash coal being intercalated with higher ash coal, shale, and siltstone. Average total sulfur contents. in contrast, assume a more normal distribution, with the oldest and youngest coal beds/groups being lower in sulfur, and middle-aged beds/groups being higher in sulfuric. Average Arsenic concentrations mirror this trend. This trend may be a function of these middle-aged beds/groups being capped by well-developed, widespread marine zones, in contrast to younger and older beds/groups which are more commonly covered by strata of fresh water origin. Spatial trends are also evident. Geographically, the Eastern Kentucky Coalmore » Field is divided into six Reserve Districts.« less" @default.
- W2341115132 created "2016-06-24" @default.
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- W2341115132 date "1994-12-31" @default.
- W2341115132 modified "2023-09-24" @default.
- W2341115132 title "Coal quality trends in the Eastern Kentucky Coal Field" @default.
- W2341115132 hasPublicationYear "1994" @default.
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