| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.200 | 0.418 | 1.411 | 4.854 |
| Arsenic | As (ppm) | 7.281 | 2.012 | 2.183 | 21.388 |
| Calcium | Ca (wt%) | 0.341 | 0.265 | 0.121 | 1.826 |
| Copper | Cu (ppm) | 9.187 | 1.786 | 3.682 | 23.464 |
| Iron | Fe (wt%) | 1.938 | 0.371 | 0.685 | 3.912 |
| Mercury | Hg (ppm) | 0.053 | 0.010 | 0.032 | 0.084 |
| Magnesium | Mg (wt%) | 0.147 | 0.037 | 0.055 | 0.325 |
| Manganese | Mn (ppm) | 1428.560 | 417.825 | 351.356 | 3839.350 |
| Sodium | Na (wt%) | 0.080 | 0.021 | 0.037 | 0.135 |
| Phosphorus | P (wt%) | 0.088 | 0.096 | 0.026 | 0.675 |
| Lead | Pb (ppm) | 28.299 | 4.400 | 10.298 | 52.160 |
| Selenium | Se (ppm) | 0.300 | 0.095 | 0.102 | 0.590 |
| Titanium | Ti (wt%) | 0.351 | 0.043 | 0.175 | 0.495 |
| Zinc | Zn (ppm) | 52.828 | 13.633 | 27.095 | 155.948 |