| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.386 | 0.474 | 2.011 | 4.696 |
| Arsenic | As (ppm) | 3.951 | 0.933 | 2.029 | 8.005 |
| Calcium | Ca (wt%) | 0.296 | 0.092 | 0.172 | 0.819 |
| Copper | Cu (ppm) | 8.162 | 1.378 | 5.108 | 11.761 |
| Iron | Fe (wt%) | 1.648 | 0.225 | 0.980 | 2.299 |
| Mercury | Hg (ppm) | 0.012 | 0.004 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.303 | 0.060 | 0.163 | 0.510 |
| Manganese | Mn (ppm) | 349.444 | 82.582 | 216.232 | 734.593 |
| Sodium | Na (wt%) | 0.415 | 0.079 | 0.207 | 0.662 |
| Phosphorus | P (wt%) | 0.021 | 0.004 | 0.013 | 0.030 |
| Lead | Pb (ppm) | 13.261 | 2.559 | 4.752 | 18.512 |
| Selenium | Se (ppm) | 0.119 | 0.022 | 0.100 | 0.218 |
| Titanium | Ti (wt%) | 0.220 | 0.029 | 0.148 | 0.311 |
| Zinc | Zn (ppm) | 29.314 | 4.747 | 15.143 | 44.798 |