| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.865 | 0.454 | 3.007 | 5.189 |
| Arsenic | As (ppm) | 8.034 | 0.870 | 5.954 | 11.648 |
| Calcium | Ca (wt%) | 1.058 | 0.670 | 0.159 | 3.863 |
| Copper | Cu (ppm) | 16.375 | 2.505 | 10.163 | 24.920 |
| Iron | Fe (wt%) | 2.562 | 0.315 | 1.942 | 3.445 |
| Mercury | Hg (ppm) | 0.047 | 0.010 | 0.023 | 0.102 |
| Magnesium | Mg (wt%) | 0.597 | 0.262 | 0.245 | 1.994 |
| Manganese | Mn (ppm) | 763.298 | 137.753 | 427.026 | 1097.330 |
| Sodium | Na (wt%) | 0.198 | 0.031 | 0.135 | 0.274 |
| Phosphorus | P (wt%) | 0.047 | 0.006 | 0.031 | 0.059 |
| Lead | Pb (ppm) | 28.629 | 6.533 | 21.055 | 59.221 |
| Selenium | Se (ppm) | 0.343 | 0.085 | 0.125 | 0.491 |
| Titanium | Ti (wt%) | 0.279 | 0.027 | 0.167 | 0.356 |
| Zinc | Zn (ppm) | 89.558 | 15.805 | 60.712 | 134.928 |