| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.462 | 0.460 | 0.069 | 3.713 |
| Arsenic | As (ppm) | 2.438 | 3.097 | 0.317 | 33.948 |
| Calcium | Ca (wt%) | 0.028 | 0.023 | 0.003 | 0.170 |
| Copper | Cu (ppm) | 8.506 | 8.756 | 1.035 | 59.963 |
| Iron | Fe (wt%) | 0.334 | 0.340 | 0.004 | 2.086 |
| Mercury | Hg (ppm) | 0.021 | 0.019 | 0.010 | 0.137 |
| Magnesium | Mg (wt%) | 0.016 | 0.013 | 0.003 | 0.073 |
| Manganese | Mn (ppm) | 69.711 | 80.325 | 6.937 | 510.220 |
| Sodium | Na (wt%) | 0.007 | 0.005 | 0.003 | 0.036 |
| Phosphorus | P (wt%) | 0.008 | 0.007 | 0.003 | 0.063 |
| Lead | Pb (ppm) | 16.229 | 12.133 | 2.092 | 63.627 |
| Selenium | Se (ppm) | 0.204 | 0.136 | 0.101 | 1.074 |
| Titanium | Ti (wt%) | 0.353 | 0.118 | 0.082 | 0.752 |
| Zinc | Zn (ppm) | 11.815 | 8.365 | 1.921 | 44.184 |