| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.883 | 0.454 | 0.153 | 2.274 |
| Arsenic | As (ppm) | 2.044 | 1.072 | 0.414 | 8.523 |
| Calcium | Ca (wt%) | 0.029 | 0.021 | 0.009 | 0.135 |
| Copper | Cu (ppm) | 3.266 | 1.376 | 1.041 | 7.905 |
| Iron | Fe (wt%) | 0.553 | 0.278 | 0.081 | 1.613 |
| Mercury | Hg (ppm) | 0.022 | 0.015 | 0.010 | 0.121 |
| Magnesium | Mg (wt%) | 0.027 | 0.017 | 0.003 | 0.099 |
| Manganese | Mn (ppm) | 87.790 | 45.341 | 11.031 | 284.864 |
| Sodium | Na (wt%) | 0.024 | 0.060 | 0.003 | 0.494 |
| Phosphorus | P (wt%) | 0.009 | 0.004 | 0.003 | 0.023 |
| Lead | Pb (ppm) | 14.316 | 7.891 | 2.903 | 48.966 |
| Selenium | Se (ppm) | 0.205 | 0.092 | 0.102 | 0.770 |
| Titanium | Ti (wt%) | 0.315 | 0.100 | 0.059 | 0.554 |
| Zinc | Zn (ppm) | 12.429 | 5.433 | 3.633 | 37.665 |