| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.528 | 0.774 | 4.165 | 8.113 |
| Arsenic | As (ppm) | 24.497 | 9.943 | 9.926 | 49.258 |
| Calcium | Ca (wt%) | 1.216 | 0.192 | 0.663 | 1.715 |
| Copper | Cu (ppm) | 23.364 | 3.652 | 14.224 | 31.946 |
| Iron | Fe (wt%) | 2.947 | 0.484 | 1.748 | 4.063 |
| Mercury | Hg (ppm) | 0.072 | 0.006 | 0.053 | 0.081 |
| Magnesium | Mg (wt%) | 0.861 | 0.150 | 0.442 | 1.197 |
| Manganese | Mn (ppm) | 825.948 | 124.103 | 550.894 | 1217.850 |
| Sodium | Na (wt%) | 0.645 | 0.101 | 0.442 | 0.895 |
| Phosphorus | P (wt%) | 0.084 | 0.009 | 0.055 | 0.099 |
| Lead | Pb (ppm) | 28.092 | 2.959 | 20.438 | 31.985 |
| Selenium | Se (ppm) | 0.793 | 0.193 | 0.404 | 1.297 |
| Titanium | Ti (wt%) | 0.299 | 0.025 | 0.235 | 0.352 |
| Zinc | Zn (ppm) | 112.537 | 14.931 | 65.920 | 140.958 |