| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.329 | 0.842 | 0.680 | 4.550 |
| Arsenic | As (ppm) | 5.276 | 2.368 | 1.522 | 12.142 |
| Calcium | Ca (wt%) | 1.316 | 1.872 | 0.024 | 9.866 |
| Copper | Cu (ppm) | 8.021 | 3.260 | 2.026 | 19.618 |
| Iron | Fe (wt%) | 1.528 | 0.702 | 0.378 | 4.046 |
| Mercury | Hg (ppm) | 0.027 | 0.026 | 0.010 | 0.165 |
| Magnesium | Mg (wt%) | 0.182 | 0.100 | 0.031 | 0.484 |
| Manganese | Mn (ppm) | 434.382 | 194.113 | 72.648 | 1500.640 |
| Sodium | Na (wt%) | 0.131 | 0.058 | 0.023 | 0.486 |
| Phosphorus | P (wt%) | 0.024 | 0.010 | 0.005 | 0.060 |
| Lead | Pb (ppm) | 14.645 | 4.027 | 6.108 | 29.245 |
| Selenium | Se (ppm) | 0.284 | 0.120 | 0.101 | 0.961 |
| Titanium | Ti (wt%) | 0.359 | 0.075 | 0.195 | 0.711 |
| Zinc | Zn (ppm) | 29.654 | 9.958 | 12.121 | 55.453 |