| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.194 | 1.079 | 0.746 | 7.566 |
| Arsenic | As (ppm) | 3.519 | 1.522 | 1.627 | 9.996 |
| Calcium | Ca (wt%) | 1.695 | 2.869 | 0.085 | 18.899 |
| Copper | Cu (ppm) | 4.300 | 2.746 | 1.098 | 15.342 |
| Iron | Fe (wt%) | 1.123 | 0.498 | 0.406 | 3.671 |
| Mercury | Hg (ppm) | 0.017 | 0.008 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.256 | 0.196 | 0.048 | 1.201 |
| Manganese | Mn (ppm) | 298.349 | 117.734 | 119.024 | 833.034 |
| Sodium | Na (wt%) | 0.166 | 0.099 | 0.054 | 0.663 |
| Phosphorus | P (wt%) | 0.018 | 0.010 | 0.005 | 0.043 |
| Lead | Pb (ppm) | 11.241 | 4.557 | 4.192 | 31.825 |
| Selenium | Se (ppm) | 0.156 | 0.061 | 0.100 | 0.393 |
| Titanium | Ti (wt%) | 0.162 | 0.032 | 0.079 | 0.314 |
| Zinc | Zn (ppm) | 23.089 | 10.287 | 6.987 | 60.612 |