| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.821 | 0.749 | 0.081 | 3.837 |
| Arsenic | As (ppm) | 1.334 | 0.438 | 0.336 | 2.864 |
| Calcium | Ca (wt%) | 0.025 | 0.010 | 0.009 | 0.072 |
| Copper | Cu (ppm) | 1.842 | 0.968 | 1.000 | 5.568 |
| Iron | Fe (wt%) | 0.523 | 0.284 | 0.167 | 1.895 |
| Mercury | Hg (ppm) | 0.017 | 0.006 | 0.010 | 0.037 |
| Magnesium | Mg (wt%) | 0.016 | 0.014 | 0.003 | 0.073 |
| Manganese | Mn (ppm) | 124.841 | 35.207 | 42.105 | 221.409 |
| Sodium | Na (wt%) | 0.022 | 0.015 | 0.003 | 0.080 |
| Phosphorus | P (wt%) | 0.012 | 0.004 | 0.003 | 0.020 |
| Lead | Pb (ppm) | 18.088 | 3.846 | 7.336 | 30.668 |
| Selenium | Se (ppm) | 0.140 | 0.053 | 0.100 | 0.367 |
| Titanium | Ti (wt%) | 0.375 | 0.081 | 0.211 | 0.564 |
| Zinc | Zn (ppm) | 7.792 | 2.856 | 2.120 | 18.669 |