| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.515 | 0.679 | 0.439 | 4.743 |
| Arsenic | As (ppm) | 3.693 | 1.808 | 1.292 | 11.947 |
| Calcium | Ca (wt%) | 0.069 | 0.047 | 0.018 | 0.202 |
| Copper | Cu (ppm) | 5.883 | 2.068 | 3.184 | 15.108 |
| Iron | Fe (wt%) | 0.962 | 0.621 | 0.262 | 4.200 |
| Mercury | Hg (ppm) | 0.032 | 0.019 | 0.012 | 0.117 |
| Magnesium | Mg (wt%) | 0.077 | 0.046 | 0.022 | 0.235 |
| Manganese | Mn (ppm) | 466.557 | 518.512 | 47.296 | 2717.320 |
| Sodium | Na (wt%) | 0.074 | 0.038 | 0.025 | 0.272 |
| Phosphorus | P (wt%) | 0.019 | 0.012 | 0.005 | 0.063 |
| Lead | Pb (ppm) | 16.637 | 11.775 | 5.171 | 88.165 |
| Selenium | Se (ppm) | 0.262 | 0.177 | 0.101 | 1.152 |
| Titanium | Ti (wt%) | 0.298 | 0.037 | 0.188 | 0.437 |
| Zinc | Zn (ppm) | 19.886 | 10.248 | 6.621 | 61.535 |