| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.657 | 0.605 | 0.411 | 4.447 |
| Arsenic | As (ppm) | 3.767 | 1.054 | 1.279 | 9.717 |
| Calcium | Ca (wt%) | 0.062 | 0.026 | 0.016 | 0.194 |
| Copper | Cu (ppm) | 6.815 | 2.014 | 2.366 | 16.866 |
| Iron | Fe (wt%) | 0.655 | 0.217 | 0.245 | 1.919 |
| Mercury | Hg (ppm) | 0.050 | 0.024 | 0.011 | 0.174 |
| Magnesium | Mg (wt%) | 0.045 | 0.017 | 0.011 | 0.151 |
| Manganese | Mn (ppm) | 121.423 | 49.882 | 51.826 | 373.752 |
| Sodium | Na (wt%) | 0.021 | 0.016 | 0.006 | 0.146 |
| Phosphorus | P (wt%) | 0.035 | 0.015 | 0.011 | 0.133 |
| Lead | Pb (ppm) | 25.492 | 11.770 | 9.559 | 107.691 |
| Selenium | Se (ppm) | 0.275 | 0.096 | 0.102 | 0.858 |
| Titanium | Ti (wt%) | 0.589 | 0.080 | 0.394 | 1.074 |
| Zinc | Zn (ppm) | 20.193 | 7.076 | 9.941 | 62.142 |