| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.174 | 0.493 | 1.173 | 4.306 |
| Arsenic | As (ppm) | 4.847 | 0.911 | 1.988 | 6.960 |
| Calcium | Ca (wt%) | 0.135 | 0.039 | 0.044 | 0.292 |
| Copper | Cu (ppm) | 8.029 | 3.648 | 3.488 | 26.437 |
| Iron | Fe (wt%) | 1.996 | 0.354 | 0.833 | 2.817 |
| Mercury | Hg (ppm) | 0.038 | 0.013 | 0.011 | 0.080 |
| Magnesium | Mg (wt%) | 0.234 | 0.042 | 0.078 | 0.364 |
| Manganese | Mn (ppm) | 470.207 | 158.886 | 147.930 | 954.851 |
| Sodium | Na (wt%) | 0.287 | 0.106 | 0.094 | 0.558 |
| Phosphorus | P (wt%) | 0.028 | 0.005 | 0.017 | 0.050 |
| Lead | Pb (ppm) | 25.435 | 11.602 | 7.194 | 89.318 |
| Selenium | Se (ppm) | 0.316 | 0.084 | 0.123 | 0.695 |
| Titanium | Ti (wt%) | 0.193 | 0.028 | 0.091 | 0.268 |
| Zinc | Zn (ppm) | 49.499 | 8.773 | 27.496 | 76.847 |