| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.262 | 1.406 | 0.192 | 6.438 |
| Arsenic | As (ppm) | 3.257 | 1.719 | 0.941 | 9.354 |
| Calcium | Ca (wt%) | 0.347 | 0.244 | 0.011 | 0.884 |
| Copper | Cu (ppm) | 11.213 | 4.610 | 2.550 | 27.042 |
| Iron | Fe (wt%) | 0.999 | 0.487 | 0.156 | 2.750 |
| Mercury | Hg (ppm) | 0.028 | 0.013 | 0.010 | 0.058 |
| Magnesium | Mg (wt%) | 0.226 | 0.191 | 0.009 | 0.961 |
| Manganese | Mn (ppm) | 334.597 | 119.169 | 66.290 | 540.812 |
| Sodium | Na (wt%) | 0.354 | 0.226 | 0.014 | 0.890 |
| Phosphorus | P (wt%) | 0.025 | 0.015 | 0.003 | 0.062 |
| Lead | Pb (ppm) | 11.130 | 5.050 | 2.188 | 24.165 |
| Selenium | Se (ppm) | 0.149 | 0.073 | 0.100 | 0.491 |
| Titanium | Ti (wt%) | 0.246 | 0.059 | 0.077 | 0.411 |
| Zinc | Zn (ppm) | 33.652 | 22.163 | 4.381 | 97.518 |