| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.646 | 0.435 | 0.577 | 2.884 |
| Arsenic | As (ppm) | 3.576 | 0.881 | 1.442 | 5.893 |
| Calcium | Ca (wt%) | 0.700 | 1.254 | 0.031 | 8.468 |
| Copper | Cu (ppm) | 9.733 | 6.060 | 4.266 | 47.693 |
| Iron | Fe (wt%) | 1.210 | 0.219 | 0.852 | 1.825 |
| Mercury | Hg (ppm) | 0.059 | 0.019 | 0.020 | 0.108 |
| Magnesium | Mg (wt%) | 0.157 | 0.127 | 0.035 | 0.936 |
| Manganese | Mn (ppm) | 406.696 | 107.458 | 167.211 | 754.974 |
| Sodium | Na (wt%) | 0.039 | 0.009 | 0.021 | 0.073 |
| Phosphorus | P (wt%) | 0.016 | 0.003 | 0.006 | 0.022 |
| Lead | Pb (ppm) | 13.647 | 2.367 | 8.805 | 19.931 |
| Selenium | Se (ppm) | 0.232 | 0.046 | 0.109 | 0.378 |
| Titanium | Ti (wt%) | 0.314 | 0.143 | 0.139 | 0.675 |
| Zinc | Zn (ppm) | 29.015 | 5.022 | 18.302 | 47.653 |