| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.403 | 0.601 | 5.051 | 8.955 |
| Arsenic | As (ppm) | 9.634 | 10.878 | 1.775 | 107.095 |
| Calcium | Ca (wt%) | 2.349 | 1.706 | 0.515 | 10.708 |
| Copper | Cu (ppm) | 21.629 | 12.402 | 8.252 | 123.112 |
| Iron | Fe (wt%) | 3.038 | 0.635 | 1.953 | 5.800 |
| Mercury | Hg (ppm) | 0.035 | 0.042 | 0.010 | 0.407 |
| Magnesium | Mg (wt%) | 0.706 | 0.157 | 0.321 | 1.197 |
| Manganese | Mn (ppm) | 562.624 | 325.915 | 170.203 | 3280.950 |
| Sodium | Na (wt%) | 0.995 | 0.233 | 0.520 | 2.360 |
| Phosphorus | P (wt%) | 0.068 | 0.015 | 0.029 | 0.121 |
| Lead | Pb (ppm) | 25.613 | 6.574 | 14.304 | 75.077 |
| Selenium | Se (ppm) | 0.719 | 0.363 | 0.110 | 1.998 |
| Titanium | Ti (wt%) | 0.336 | 0.059 | 0.178 | 0.606 |
| Zinc | Zn (ppm) | 73.237 | 10.325 | 45.211 | 108.828 |