Trace Elements in West Virginia Coals
Stratigraphic Distribution of Selenium (Se)
The stratigraphic distribution of Selenium (Se) shows that coal beds
of the Allegheny and upper Kanawha Formations of the Middle Pennsylvanian
exhibit the highest selenium contents. The coals show a generally decreasing
trend in selenium content from the upper Middle Pennsylvanian to the Lower
Pennsylvanian. Coals of the Upper Pennsylvanian exhibit the lowest selenium
abundances. Because selenium did not correlate with ash yield, total
sulfur, pyritic sulfur or other trace elements, except a poor correlation
with thorium (Th), this distribution remains unexplained
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