| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.360 | 0.696 | 3.710 | 7.466 |
| Arsenic | As (ppm) | 9.885 | 2.227 | 3.907 | 15.696 |
| Calcium | Ca (wt%) | 0.626 | 0.175 | 0.276 | 1.300 |
| Copper | Cu (ppm) | 11.611 | 1.926 | 5.493 | 17.736 |
| Iron | Fe (wt%) | 1.988 | 0.362 | 1.195 | 3.342 |
| Mercury | Hg (ppm) | 0.033 | 0.006 | 0.020 | 0.049 |
| Magnesium | Mg (wt%) | 0.505 | 0.124 | 0.180 | 0.865 |
| Manganese | Mn (ppm) | 457.075 | 98.233 | 193.970 | 786.198 |
| Sodium | Na (wt%) | 0.799 | 0.073 | 0.535 | 0.987 |
| Phosphorus | P (wt%) | 0.057 | 0.011 | 0.028 | 0.084 |
| Lead | Pb (ppm) | 16.575 | 2.136 | 11.879 | 23.734 |
| Selenium | Se (ppm) | 0.406 | 0.124 | 0.127 | 0.883 |
| Titanium | Ti (wt%) | 0.282 | 0.026 | 0.172 | 0.367 |
| Zinc | Zn (ppm) | 63.629 | 15.064 | 34.710 | 119.114 |