| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.904 | 0.281 | 2.343 | 4.076 |
| Arsenic | As (ppm) | 18.248 | 9.986 | 6.286 | 48.765 |
| Calcium | Ca (wt%) | 1.821 | 0.706 | 0.553 | 4.702 |
| Copper | Cu (ppm) | 9.300 | 1.615 | 6.419 | 14.975 |
| Iron | Fe (wt%) | 4.256 | 2.219 | 1.684 | 11.568 |
| Mercury | Hg (ppm) | 0.048 | 0.005 | 0.037 | 0.060 |
| Magnesium | Mg (wt%) | 0.240 | 0.043 | 0.149 | 0.375 |
| Manganese | Mn (ppm) | 2594.040 | 1071.950 | 1220.770 | 6343.750 |
| Sodium | Na (wt%) | 0.118 | 0.021 | 0.061 | 0.180 |
| Phosphorus | P (wt%) | 0.712 | 0.313 | 0.150 | 1.768 |
| Lead | Pb (ppm) | 25.330 | 5.019 | 16.439 | 42.915 |
| Selenium | Se (ppm) | 0.299 | 0.098 | 0.103 | 0.503 |
| Titanium | Ti (wt%) | 0.203 | 0.056 | 0.127 | 0.321 |
| Zinc | Zn (ppm) | 60.956 | 10.321 | 40.896 | 86.897 |