| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.013 | 0.856 | 0.212 | 7.127 |
| Arsenic | As (ppm) | 2.939 | 2.487 | 1.015 | 21.588 |
| Calcium | Ca (wt%) | 0.070 | 0.084 | 0.012 | 0.704 |
| Copper | Cu (ppm) | 2.438 | 1.613 | 1.019 | 13.931 |
| Iron | Fe (wt%) | 1.031 | 0.818 | 0.244 | 6.865 |
| Mercury | Hg (ppm) | 0.016 | 0.011 | 0.010 | 0.099 |
| Magnesium | Mg (wt%) | 0.033 | 0.020 | 0.009 | 0.175 |
| Manganese | Mn (ppm) | 252.835 | 127.572 | 50.008 | 747.841 |
| Sodium | Na (wt%) | 0.034 | 0.024 | 0.004 | 0.123 |
| Phosphorus | P (wt%) | 0.016 | 0.009 | 0.005 | 0.079 |
| Lead | Pb (ppm) | 15.415 | 4.421 | 4.440 | 41.846 |
| Selenium | Se (ppm) | 0.173 | 0.122 | 0.100 | 1.094 |
| Titanium | Ti (wt%) | 0.424 | 0.094 | 0.101 | 0.757 |
| Zinc | Zn (ppm) | 13.994 | 6.726 | 5.401 | 61.710 |