| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.637 | 0.584 | 1.197 | 4.357 |
| Arsenic | As (ppm) | 4.065 | 0.916 | 2.201 | 7.038 |
| Calcium | Ca (wt%) | 0.505 | 0.200 | 0.280 | 1.321 |
| Copper | Cu (ppm) | 7.421 | 2.023 | 1.605 | 11.749 |
| Iron | Fe (wt%) | 1.291 | 0.254 | 0.660 | 2.075 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 0.345 | 0.148 | 0.140 | 0.993 |
| Manganese | Mn (ppm) | 299.049 | 66.320 | 187.215 | 482.151 |
| Sodium | Na (wt%) | 0.335 | 0.114 | 0.138 | 0.695 |
| Phosphorus | P (wt%) | 0.018 | 0.005 | 0.010 | 0.036 |
| Lead | Pb (ppm) | 13.431 | 2.772 | 6.795 | 21.562 |
| Selenium | Se (ppm) | 0.122 | 0.025 | 0.100 | 0.278 |
| Titanium | Ti (wt%) | 0.208 | 0.035 | 0.137 | 0.315 |
| Zinc | Zn (ppm) | 24.775 | 4.921 | 12.517 | 43.866 |