WVGES Trace Elements in West Virginia Coals

Click Here To Go To Trace Elements Framed Home Page Dysprosium (Dy) Summary Statistics

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Of 456 samples, only 77 contained detectable levels of Dy.  The histogram of dysprosium of these analyses displays an irregular distribution with a mean of 2.03 ppm (± 1.02 ppm) on a whole coal basis with a tail toward higher values.  The maximum Dy content was 6.18 ppm in the Powellton A coal.  Despite the small number of analyses, dysprosium correlated slightly with ash yield and several rare earth elements such as erbium (Er), gadolinium (Gd), neodymium (Nd), cerium (Ce), europium (Eu), lanthanum (La), samarium (Sm) and terbium (Tb) and ash related elements such as lithium (Li), thorium (Th), vanadium (V), zirconium (Zr), chromium (Cr) and lead (Pb). Many of these correlations were with elements present in the mineral monazite (Y, Gd, Nd, Ce and La).
 

Spearman Correlation Coefficients (r) with Dysprosium
Ash Yield
Er
Y
Gd
Nd
Li
Th
V
Zr
Ce
+0.6462
+0.8171
+0.8130
+0.7661
+0.7626
+0.6867
+0.6867
+0.6867
+0.6778
+0.6740
n = 77
n = 68
n = 77
n = 59
n = 55
n = 77
n = 70
n = 77
n = 77
n = 77
Ag
Eu
La
Nb
Ga
Sm
Cr
Pb
Sc
Tb
+0.6514
+0.6462
+0.6424
+0.6365
+0.6328
+0.6287
+0.6227
+0.6179
+0.6101
+0.5872
n = 70
n = 77
n = 77
n = 77
n = 77
n = 77
n = 77
n = 77
n = 77
n = 59
Go to Stratigraphic Distribution of DysprosiumGo to Dysprosium State MapGo to General Elements PageGo to All Elements Summary Statistics Table
 
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