| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.805 | 1.007 | 2.133 | 5.865 |
| Arsenic | As (ppm) | 3.685 | 0.825 | 2.241 | 6.148 |
| Calcium | Ca (wt%) | 0.873 | 0.608 | 0.303 | 2.545 |
| Copper | Cu (ppm) | 9.642 | 4.522 | 3.017 | 20.799 |
| Iron | Fe (wt%) | 1.424 | 0.501 | 0.747 | 2.670 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 0.494 | 0.337 | 0.150 | 1.336 |
| Manganese | Mn (ppm) | 340.339 | 91.205 | 190.957 | 584.122 |
| Sodium | Na (wt%) | 0.715 | 0.104 | 0.506 | 0.907 |
| Phosphorus | P (wt%) | 0.026 | 0.011 | 0.010 | 0.053 |
| Lead | Pb (ppm) | 22.239 | 4.704 | 15.019 | 31.837 |
| Selenium | Se (ppm) | 0.139 | 0.035 | 0.100 | 0.241 |
| Titanium | Ti (wt%) | 0.251 | 0.039 | 0.165 | 0.340 |
| Zinc | Zn (ppm) | 26.457 | 12.226 | 10.025 | 54.684 |