| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.903 | 0.954 | 0.369 | 4.370 |
| Arsenic | As (ppm) | 9.011 | 4.922 | 1.209 | 18.613 |
| Calcium | Ca (wt%) | 0.258 | 0.120 | 0.038 | 0.581 |
| Copper | Cu (ppm) | 17.257 | 3.269 | 4.894 | 24.875 |
| Iron | Fe (wt%) | 1.679 | 0.689 | 0.234 | 2.916 |
| Mercury | Hg (ppm) | 0.016 | 0.004 | 0.006 | 0.022 |
| Magnesium | Mg (wt%) | 0.197 | 0.077 | 0.024 | 0.370 |
| Manganese | Mn (ppm) | 1382.800 | 562.607 | 130.479 | 2464.240 |
| Sodium | Na (wt%) | 0.515 | 0.208 | 0.036 | 0.974 |
| Phosphorus | P (wt%) | 0.047 | 0.022 | 0.007 | 0.098 |
| Lead | Pb (ppm) | 16.134 | 6.094 | 2.627 | 27.480 |
| Selenium | Se (ppm) | 0.176 | 0.044 | 0.105 | 0.298 |
| Titanium | Ti (wt%) | 0.250 | 0.055 | 0.071 | 0.336 |
| Zinc | Zn (ppm) | 36.016 | 11.947 | 7.572 | 60.621 |