WVGES Trace Elements in West Virginia Coals

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Ytterbium averaged 0.80 ppm (± 0.44 ppm) in West Virginia coals with an irregular skewed histogram showing a tail toward higher values and a maximum value of 3.10 ppm in a bench of the Coalburg coal.  Ytterbium is a rare earth element present in minor amounts in the mineral monazite that correlated poorly with ash yield, but correlated well with several of the other rare earth elements, especially lutetium (Lu), europium (Eu), samarium (Sm), cerium (Ce), terbium (Tb), lanthanum (La) and erbium (Er).  Vanadium also correlated well with several ash related elements such as scandium (Sc), thorium (Th), yttrium (Y), chromium (Cr), vanadium (V), lead (Pb), gallium (Ga) and lithium (Li).
 
Spearman Correlation Coefficients (r) with Ytterbium
Ash Yield
Lu
Eu
Sc
Sm
Th
Y
Ce
+0.5417
+0.9324
+0.8705
+0.8568
+0.8256
+0.7482
+0.7421
+0.7387
n = 547
n = 502
n = 536
n = 547
n = 537
n = 529
n = 547
n = 542
Cr
V
La
Pb
Er
Ga
Ta
Li
+0.7240
+0.7146
+0.7100
+0.7030
+0.6907
+0.6543
+0.6300
+0.6162
n = 546
n = 546
n = 544
n = 544
n = 206
n = 546
n = 458
n = 547
Go to Stratigraphic Distribution of YtterbiumGo to Ytterbium State MapGo to General Elements PageGo to All Elements Summary Statistics Table
 
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