| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.689 | 0.260 | 3.979 | 5.295 |
| Arsenic | As (ppm) | 1.181 | 0.225 | 0.704 | 1.695 |
| Calcium | Ca (wt%) | 0.718 | 0.280 | 0.100 | 1.422 |
| Copper | Cu (ppm) | 12.321 | 1.286 | 9.035 | 16.323 |
| Iron | Fe (wt%) | 3.200 | 0.408 | 2.044 | 4.046 |
| Mercury | Hg (ppm) | 0.482 | 0.232 | 0.078 | 1.154 |
| Magnesium | Mg (wt%) | 0.324 | 0.077 | 0.130 | 0.516 |
| Manganese | Mn (ppm) | 724.319 | 100.785 | 533.704 | 958.736 |
| Sodium | Na (wt%) | 0.391 | 0.124 | 0.152 | 0.707 |
| Phosphorus | P (wt%) | 0.019 | 0.007 | 0.007 | 0.032 |
| Lead | Pb (ppm) | 26.513 | 6.127 | 13.153 | 39.719 |
| Selenium | Se (ppm) | 0.224 | 0.084 | 0.102 | 0.565 |
| Titanium | Ti (wt%) | 0.647 | 0.109 | 0.441 | 0.877 |
| Zinc | Zn (ppm) | 43.235 | 4.872 | 29.626 | 56.761 |