| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.760 | 0.793 | 1.897 | 5.334 |
| Arsenic | As (ppm) | 5.615 | 0.968 | 3.201 | 7.492 |
| Calcium | Ca (wt%) | 1.211 | 0.618 | 0.260 | 3.860 |
| Copper | Cu (ppm) | 15.912 | 3.591 | 7.177 | 20.881 |
| Iron | Fe (wt%) | 1.659 | 0.396 | 0.738 | 2.328 |
| Mercury | Hg (ppm) | 0.016 | 0.003 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.315 | 0.084 | 0.134 | 0.526 |
| Manganese | Mn (ppm) | 399.803 | 130.257 | 212.749 | 816.000 |
| Sodium | Na (wt%) | 0.231 | 0.024 | 0.170 | 0.325 |
| Phosphorus | P (wt%) | 0.028 | 0.006 | 0.013 | 0.038 |
| Lead | Pb (ppm) | 16.788 | 2.525 | 12.002 | 22.980 |
| Selenium | Se (ppm) | 0.118 | 0.022 | 0.100 | 0.189 |
| Titanium | Ti (wt%) | 0.233 | 0.035 | 0.158 | 0.300 |
| Zinc | Zn (ppm) | 65.649 | 16.248 | 36.766 | 104.881 |