WVGES Trace Elements in West Virginia Coals

Click Here To Go To Trace Elements Framed Home Page Erbium (Er) Summary Statistics

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The histogram of erbium abundances in all West Virginia coal beds shows a slightly skewed distribution with a mean of 1.09 ppm (± 0.64 ppm) on a whole coal basis.  The maximum Er content was 4.65 ppm in a bench of the Coalburg coal.  Erbium did not correlate with ash yield, but correlated well with other rare earth elements in the mineral monazite such as dysprosium (Dy), yttrium (Y), gadolinium (Gd), neodymium (Nd), europium (Eu) and also ytterbium (Yb) and thorium (Th), and with several ash related elements such as vanadium (V), scandium (Sc), gallium (Ga), zirconium (Zr) and chromium (Cr).
Spearman Correlation Coefficients (r) with Erbium
Ash Yield
n = 208
n = 68
n = 208
n = 157
n = 207
n = 156
n = 208
n = 206
n = 208
n = 208
n = 207
n = 207
n = 196
n = 203
Go to Stratigraphic Distribution of ErbiumGo to Erbium State MapGo to General Elements PageGo to All Elements Summary Statistics Table
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