| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.875 | 0.812 | 1.342 | 4.901 |
| Arsenic | As (ppm) | 5.366 | 1.559 | 3.703 | 11.269 |
| Calcium | Ca (wt%) | 0.444 | 0.320 | 0.073 | 1.869 |
| Copper | Cu (ppm) | 12.466 | 4.321 | 5.724 | 23.783 |
| Iron | Fe (wt%) | 1.876 | 0.534 | 1.104 | 3.313 |
| Mercury | Hg (ppm) | 0.429 | 0.637 | 0.030 | 3.039 |
| Magnesium | Mg (wt%) | 0.203 | 0.075 | 0.098 | 0.349 |
| Manganese | Mn (ppm) | 600.604 | 421.405 | 57.296 | 1778.520 |
| Sodium | Na (wt%) | 0.069 | 0.035 | 0.016 | 0.183 |
| Phosphorus | P (wt%) | 0.027 | 0.011 | 0.011 | 0.064 |
| Lead | Pb (ppm) | 29.444 | 18.238 | 11.306 | 128.225 |
| Selenium | Se (ppm) | 0.318 | 0.084 | 0.107 | 0.699 |
| Titanium | Ti (wt%) | 0.285 | 0.049 | 0.188 | 0.394 |
| Zinc | Zn (ppm) | 56.639 | 22.553 | 21.057 | 133.785 |