| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.327 | 0.359 | 4.397 | 6.149 |
| Arsenic | As (ppm) | 5.099 | 0.908 | 3.244 | 8.959 |
| Calcium | Ca (wt%) | 1.680 | 0.721 | 1.099 | 5.605 |
| Copper | Cu (ppm) | 16.016 | 1.645 | 10.675 | 24.632 |
| Iron | Fe (wt%) | 2.240 | 0.312 | 1.749 | 3.178 |
| Mercury | Hg (ppm) | 0.015 | 0.004 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.761 | 0.113 | 0.625 | 1.164 |
| Manganese | Mn (ppm) | 450.416 | 42.156 | 351.672 | 591.454 |
| Sodium | Na (wt%) | 0.979 | 0.065 | 0.761 | 1.116 |
| Phosphorus | P (wt%) | 0.086 | 0.007 | 0.073 | 0.108 |
| Lead | Pb (ppm) | 20.323 | 3.633 | 11.750 | 33.093 |
| Selenium | Se (ppm) | 0.225 | 0.141 | 0.102 | 1.244 |
| Titanium | Ti (wt%) | 0.294 | 0.043 | 0.209 | 0.410 |
| Zinc | Zn (ppm) | 71.194 | 7.827 | 51.247 | 95.427 |