| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.593 | 0.878 | 1.815 | 5.278 |
| Arsenic | As (ppm) | 1.559 | 0.586 | 0.349 | 4.139 |
| Calcium | Ca (wt%) | 0.648 | 0.286 | 0.164 | 1.296 |
| Copper | Cu (ppm) | 8.218 | 1.449 | 4.227 | 12.904 |
| Iron | Fe (wt%) | 2.203 | 0.510 | 0.603 | 3.596 |
| Mercury | Hg (ppm) | 0.028 | 0.012 | 0.011 | 0.105 |
| Magnesium | Mg (wt%) | 0.337 | 0.139 | 0.060 | 0.949 |
| Manganese | Mn (ppm) | 442.676 | 133.364 | 198.208 | 755.117 |
| Sodium | Na (wt%) | 0.413 | 0.180 | 0.139 | 0.912 |
| Phosphorus | P (wt%) | 0.016 | 0.005 | 0.004 | 0.049 |
| Lead | Pb (ppm) | 18.979 | 7.373 | 7.301 | 44.189 |
| Selenium | Se (ppm) | 0.165 | 0.032 | 0.103 | 0.297 |
| Titanium | Ti (wt%) | 0.427 | 0.079 | 0.222 | 0.656 |
| Zinc | Zn (ppm) | 31.190 | 4.610 | 18.796 | 43.820 |