| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.812 | 0.298 | 2.037 | 3.087 |
| Arsenic | As (ppm) | 3.186 | 0.882 | 1.854 | 4.337 |
| Calcium | Ca (wt%) | 0.319 | 0.036 | 0.206 | 0.401 |
| Copper | Cu (ppm) | 4.096 | 0.755 | 2.764 | 5.074 |
| Iron | Fe (wt%) | 1.229 | 0.238 | 0.719 | 1.514 |
| Mercury | Hg (ppm) | 0.012 | 0.002 | 0.010 | 0.015 |
| Magnesium | Mg (wt%) | 0.260 | 0.055 | 0.118 | 0.319 |
| Manganese | Mn (ppm) | 187.868 | 42.618 | 123.741 | 241.149 |
| Sodium | Na (wt%) | 0.325 | 0.043 | 0.274 | 0.398 |
| Phosphorus | P (wt%) | 0.024 | 0.003 | 0.015 | 0.027 |
| Lead | Pb (ppm) | 14.219 | 2.440 | 9.606 | 16.973 |
| Selenium | Se (ppm) | 0.343 | 0.081 | 0.138 | 0.436 |
| Titanium | Ti (wt%) | 0.183 | 0.010 | 0.174 | 0.214 |
| Zinc | Zn (ppm) | 30.785 | 5.686 | 16.088 | 35.910 |