| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.613 | 0.871 | 0.899 | 4.868 |
| Arsenic | As (ppm) | 6.061 | 1.791 | 1.931 | 11.960 |
| Calcium | Ca (wt%) | 0.266 | 0.216 | 0.044 | 1.623 |
| Copper | Cu (ppm) | 31.238 | 61.767 | 3.012 | 716.194 |
| Iron | Fe (wt%) | 1.637 | 0.390 | 0.985 | 2.916 |
| Mercury | Hg (ppm) | 0.052 | 0.021 | 0.012 | 0.136 |
| Magnesium | Mg (wt%) | 0.113 | 0.038 | 0.037 | 0.209 |
| Manganese | Mn (ppm) | 778.304 | 280.733 | 268.939 | 1771.790 |
| Sodium | Na (wt%) | 0.071 | 0.018 | 0.026 | 0.139 |
| Phosphorus | P (wt%) | 0.033 | 0.017 | 0.013 | 0.120 |
| Lead | Pb (ppm) | 48.909 | 55.463 | 6.469 | 499.274 |
| Selenium | Se (ppm) | 0.302 | 0.148 | 0.100 | 0.670 |
| Titanium | Ti (wt%) | 0.335 | 0.044 | 0.193 | 0.492 |
| Zinc | Zn (ppm) | 75.650 | 86.123 | 23.145 | 1020.770 |