| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.493 | 0.719 | 1.157 | 4.299 |
| Arsenic | As (ppm) | 4.845 | 1.625 | 1.284 | 8.784 |
| Calcium | Ca (wt%) | 0.077 | 0.051 | 0.016 | 0.208 |
| Copper | Cu (ppm) | 6.995 | 1.256 | 4.607 | 9.304 |
| Iron | Fe (wt%) | 1.352 | 0.245 | 0.774 | 1.924 |
| Mercury | Hg (ppm) | 0.025 | 0.004 | 0.013 | 0.033 |
| Magnesium | Mg (wt%) | 0.045 | 0.015 | 0.018 | 0.081 |
| Manganese | Mn (ppm) | 220.069 | 55.134 | 107.527 | 458.293 |
| Sodium | Na (wt%) | 0.079 | 0.067 | 0.008 | 0.249 |
| Phosphorus | P (wt%) | 0.036 | 0.010 | 0.014 | 0.072 |
| Lead | Pb (ppm) | 27.815 | 9.167 | 5.746 | 47.743 |
| Selenium | Se (ppm) | 0.239 | 0.084 | 0.107 | 0.472 |
| Titanium | Ti (wt%) | 0.602 | 0.097 | 0.367 | 0.853 |
| Zinc | Zn (ppm) | 21.014 | 3.836 | 11.947 | 32.677 |