| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.223 | 0.467 | 3.075 | 5.963 |
| Arsenic | As (ppm) | 5.922 | 0.842 | 4.054 | 9.922 |
| Calcium | Ca (wt%) | 5.561 | 1.491 | 2.664 | 12.981 |
| Copper | Cu (ppm) | 14.157 | 2.378 | 8.098 | 24.962 |
| Iron | Fe (wt%) | 1.785 | 0.237 | 1.238 | 2.598 |
| Mercury | Hg (ppm) | 0.014 | 0.005 | 0.010 | 0.038 |
| Magnesium | Mg (wt%) | 1.326 | 0.503 | 0.471 | 2.606 |
| Manganese | Mn (ppm) | 351.866 | 59.327 | 233.045 | 684.123 |
| Sodium | Na (wt%) | 0.527 | 0.161 | 0.227 | 0.983 |
| Phosphorus | P (wt%) | 0.044 | 0.005 | 0.031 | 0.060 |
| Lead | Pb (ppm) | 14.007 | 3.338 | 8.132 | 28.058 |
| Selenium | Se (ppm) | 0.202 | 0.081 | 0.102 | 0.496 |
| Titanium | Ti (wt%) | 0.232 | 0.021 | 0.153 | 0.290 |
| Zinc | Zn (ppm) | 48.635 | 10.814 | 27.794 | 93.115 |