Trace Elements in West Virginia Coals
Stratigraphic Distribution of Hafnium (Hf)
The stratigraphic Distribution of Hafnium (Hf) shows that coals of the
upper Kanawha Formation and Allegheny Group contain the highest average
hafnium contents. These coals tend to be high in ash yield, and therefore
are expected to have higher zircon contents. Generally higher ash
coals of the Upper Pennsylvanian, however, only show moderate hafnium contents.
A comparison of the stratigraphic distribution of hafnium with that of
yield in West Virginia coals shows a poor relationship, indicating
that hafnium content may not be exclusively related to ash yield or zircon
content of the coal.
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