| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.513 | 0.524 | 6.286 | 9.636 |
| Arsenic | As (ppm) | 9.796 | 6.406 | 0.488 | 30.300 |
| Calcium | Ca (wt%) | 2.444 | 0.721 | 0.468 | 4.167 |
| Copper | Cu (ppm) | 30.186 | 14.966 | 7.734 | 79.000 |
| Iron | Fe (wt%) | 4.546 | 0.845 | 2.835 | 7.218 |
| Mercury | Hg (ppm) | 0.112 | 0.244 | 0.010 | 1.797 |
| Magnesium | Mg (wt%) | 1.673 | 0.572 | 0.459 | 4.585 |
| Manganese | Mn (ppm) | 819.186 | 208.064 | 233.156 | 1543.920 |
| Sodium | Na (wt%) | 2.230 | 0.426 | 0.938 | 3.187 |
| Phosphorus | P (wt%) | 0.095 | 0.026 | 0.034 | 0.203 |
| Lead | Pb (ppm) | 12.348 | 7.057 | 2.046 | 57.178 |
| Selenium | Se (ppm) | 0.267 | 0.156 | 0.100 | 1.669 |
| Titanium | Ti (wt%) | 0.535 | 0.123 | 0.366 | 1.064 |
| Zinc | Zn (ppm) | 87.942 | 18.984 | 43.078 | 151.683 |