| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.444 | 0.815 | 1.571 | 5.669 |
| Arsenic | As (ppm) | 6.358 | 1.409 | 3.359 | 9.661 |
| Calcium | Ca (wt%) | 0.791 | 1.087 | 0.120 | 10.196 |
| Copper | Cu (ppm) | 7.241 | 2.255 | 3.184 | 13.588 |
| Iron | Fe (wt%) | 1.538 | 0.285 | 0.638 | 2.363 |
| Mercury | Hg (ppm) | 0.015 | 0.005 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.276 | 0.101 | 0.060 | 0.611 |
| Manganese | Mn (ppm) | 191.406 | 52.174 | 108.177 | 341.493 |
| Sodium | Na (wt%) | 0.325 | 0.217 | 0.100 | 0.900 |
| Phosphorus | P (wt%) | 0.023 | 0.007 | 0.011 | 0.075 |
| Lead | Pb (ppm) | 14.670 | 2.752 | 5.711 | 23.397 |
| Selenium | Se (ppm) | 0.224 | 0.092 | 0.100 | 0.485 |
| Titanium | Ti (wt%) | 0.232 | 0.037 | 0.119 | 0.317 |
| Zinc | Zn (ppm) | 38.936 | 6.140 | 13.007 | 51.871 |