| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.522 | 1.214 | 0.985 | 6.060 |
| Arsenic | As (ppm) | 6.379 | 1.855 | 1.823 | 10.858 |
| Calcium | Ca (wt%) | 0.134 | 0.049 | 0.032 | 0.273 |
| Copper | Cu (ppm) | 17.531 | 6.316 | 3.592 | 35.571 |
| Iron | Fe (wt%) | 2.194 | 0.869 | 0.629 | 3.881 |
| Mercury | Hg (ppm) | 0.084 | 0.038 | 0.012 | 0.228 |
| Magnesium | Mg (wt%) | 0.360 | 0.143 | 0.065 | 0.912 |
| Manganese | Mn (ppm) | 542.589 | 409.061 | 129.250 | 3034.690 |
| Sodium | Na (wt%) | 0.171 | 0.035 | 0.071 | 0.273 |
| Phosphorus | P (wt%) | 0.039 | 0.012 | 0.012 | 0.076 |
| Lead | Pb (ppm) | 22.214 | 9.464 | 2.918 | 53.648 |
| Selenium | Se (ppm) | 0.588 | 0.186 | 0.114 | 0.979 |
| Titanium | Ti (wt%) | 0.198 | 0.051 | 0.083 | 0.308 |
| Zinc | Zn (ppm) | 70.948 | 28.982 | 12.433 | 169.631 |