| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.313 | 0.793 | 1.558 | 5.724 |
| Arsenic | As (ppm) | 5.160 | 1.904 | 1.237 | 10.536 |
| Calcium | Ca (wt%) | 0.242 | 0.088 | 0.074 | 0.524 |
| Copper | Cu (ppm) | 6.899 | 2.196 | 3.022 | 14.219 |
| Iron | Fe (wt%) | 1.002 | 0.304 | 0.582 | 2.315 |
| Mercury | Hg (ppm) | 0.026 | 0.011 | 0.010 | 0.083 |
| Magnesium | Mg (wt%) | 0.187 | 0.085 | 0.064 | 0.716 |
| Manganese | Mn (ppm) | 219.996 | 99.190 | 62.835 | 453.631 |
| Sodium | Na (wt%) | 0.616 | 0.191 | 0.182 | 0.919 |
| Phosphorus | P (wt%) | 0.024 | 0.009 | 0.010 | 0.055 |
| Lead | Pb (ppm) | 12.076 | 2.925 | 6.102 | 24.085 |
| Selenium | Se (ppm) | 0.251 | 0.085 | 0.101 | 0.530 |
| Titanium | Ti (wt%) | 0.246 | 0.053 | 0.133 | 0.364 |
| Zinc | Zn (ppm) | 27.373 | 8.942 | 10.244 | 61.256 |