| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.711 | 0.660 | 3.187 | 6.130 |
| Arsenic | As (ppm) | 1.390 | 0.649 | 0.492 | 5.456 |
| Calcium | Ca (wt%) | 0.604 | 0.253 | 0.183 | 1.261 |
| Copper | Cu (ppm) | 12.006 | 3.138 | 4.504 | 20.730 |
| Iron | Fe (wt%) | 3.497 | 0.879 | 1.861 | 5.728 |
| Mercury | Hg (ppm) | 0.155 | 0.054 | 0.020 | 0.344 |
| Magnesium | Mg (wt%) | 0.430 | 0.131 | 0.191 | 0.695 |
| Manganese | Mn (ppm) | 487.504 | 90.850 | 289.531 | 725.719 |
| Sodium | Na (wt%) | 0.437 | 0.138 | 0.158 | 0.855 |
| Phosphorus | P (wt%) | 0.046 | 0.025 | 0.013 | 0.150 |
| Lead | Pb (ppm) | 24.582 | 6.295 | 12.473 | 49.290 |
| Selenium | Se (ppm) | 0.162 | 0.022 | 0.101 | 0.202 |
| Titanium | Ti (wt%) | 0.700 | 0.140 | 0.362 | 1.261 |
| Zinc | Zn (ppm) | 53.450 | 11.276 | 30.561 | 81.132 |