| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.324 | 0.435 | 0.423 | 2.257 |
| Arsenic | As (ppm) | 5.524 | 3.509 | 1.279 | 23.608 |
| Calcium | Ca (wt%) | 0.867 | 0.728 | 0.046 | 4.121 |
| Copper | Cu (ppm) | 4.340 | 3.028 | 1.050 | 18.095 |
| Iron | Fe (wt%) | 1.797 | 0.513 | 0.790 | 4.682 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.011 |
| Magnesium | Mg (wt%) | 0.085 | 0.036 | 0.021 | 0.172 |
| Manganese | Mn (ppm) | 544.396 | 225.028 | 236.901 | 1652.790 |
| Sodium | Na (wt%) | 0.071 | 0.022 | 0.018 | 0.110 |
| Phosphorus | P (wt%) | 0.027 | 0.018 | 0.003 | 0.084 |
| Lead | Pb (ppm) | 22.903 | 3.701 | 15.255 | 44.864 |
| Selenium | Se (ppm) | 0.184 | 0.128 | 0.101 | 0.943 |
| Titanium | Ti (wt%) | 0.515 | 0.089 | 0.152 | 0.778 |
| Zinc | Zn (ppm) | 23.801 | 5.337 | 12.324 | 52.626 |