| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.975 | 0.367 | 4.024 | 6.558 |
| Arsenic | As (ppm) | 2.791 | 0.596 | 1.496 | 6.837 |
| Calcium | Ca (wt%) | 1.242 | 0.264 | 0.785 | 2.497 |
| Copper | Cu (ppm) | 11.156 | 2.047 | 7.221 | 16.486 |
| Iron | Fe (wt%) | 3.673 | 0.851 | 2.374 | 8.027 |
| Mercury | Hg (ppm) | 0.031 | 0.007 | 0.014 | 0.059 |
| Magnesium | Mg (wt%) | 0.526 | 0.105 | 0.366 | 0.958 |
| Manganese | Mn (ppm) | 860.165 | 238.072 | 531.102 | 1827.060 |
| Sodium | Na (wt%) | 1.537 | 0.128 | 1.266 | 1.937 |
| Phosphorus | P (wt%) | 0.096 | 0.016 | 0.065 | 0.143 |
| Lead | Pb (ppm) | 27.136 | 3.550 | 18.294 | 43.627 |
| Selenium | Se (ppm) | 0.110 | 0.018 | 0.100 | 0.235 |
| Titanium | Ti (wt%) | 0.956 | 0.227 | 0.493 | 1.463 |
| Zinc | Zn (ppm) | 49.486 | 6.142 | 37.886 | 68.594 |