| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.108 | 0.877 | 0.204 | 5.064 |
| Arsenic | As (ppm) | 3.729 | 1.624 | 1.551 | 13.477 |
| Calcium | Ca (wt%) | 0.082 | 0.100 | 0.009 | 0.578 |
| Copper | Cu (ppm) | 3.344 | 1.288 | 1.049 | 8.875 |
| Iron | Fe (wt%) | 0.932 | 0.550 | 0.328 | 3.994 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.069 | 0.064 | 0.013 | 0.400 |
| Manganese | Mn (ppm) | 259.482 | 243.921 | 78.413 | 1826.200 |
| Sodium | Na (wt%) | 0.051 | 0.031 | 0.009 | 0.174 |
| Phosphorus | P (wt%) | 0.010 | 0.005 | 0.003 | 0.043 |
| Lead | Pb (ppm) | 15.676 | 6.081 | 4.989 | 53.412 |
| Selenium | Se (ppm) | 0.172 | 0.119 | 0.101 | 0.854 |
| Titanium | Ti (wt%) | 0.411 | 0.072 | 0.173 | 0.565 |
| Zinc | Zn (ppm) | 17.857 | 11.821 | 3.636 | 76.596 |