| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.520 | 0.626 | 5.794 | 8.393 |
| Arsenic | As (ppm) | 4.008 | 1.412 | 1.338 | 8.352 |
| Calcium | Ca (wt%) | 2.139 | 0.808 | 0.695 | 5.593 |
| Copper | Cu (ppm) | 69.294 | 32.962 | 14.740 | 151.495 |
| Iron | Fe (wt%) | 5.603 | 1.634 | 2.719 | 9.152 |
| Mercury | Hg (ppm) | 0.048 | 0.013 | 0.019 | 0.085 |
| Magnesium | Mg (wt%) | 1.679 | 0.672 | 0.815 | 3.438 |
| Manganese | Mn (ppm) | 1110.320 | 302.293 | 532.023 | 1775.150 |
| Sodium | Na (wt%) | 1.619 | 0.238 | 1.115 | 2.165 |
| Phosphorus | P (wt%) | 0.085 | 0.030 | 0.032 | 0.219 |
| Lead | Pb (ppm) | 5.908 | 5.224 | 2.025 | 31.637 |
| Selenium | Se (ppm) | 0.308 | 0.188 | 0.100 | 1.038 |
| Titanium | Ti (wt%) | 0.773 | 0.222 | 0.353 | 1.279 |
| Zinc | Zn (ppm) | 79.932 | 15.810 | 43.455 | 108.579 |