| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.916 | 0.505 | 3.592 | 5.948 |
| Arsenic | As (ppm) | 9.961 | 2.147 | 4.208 | 13.093 |
| Calcium | Ca (wt%) | 0.617 | 0.419 | 0.191 | 2.837 |
| Copper | Cu (ppm) | 16.891 | 3.676 | 6.526 | 25.778 |
| Iron | Fe (wt%) | 3.112 | 0.317 | 1.985 | 3.770 |
| Mercury | Hg (ppm) | 0.070 | 0.022 | 0.034 | 0.143 |
| Magnesium | Mg (wt%) | 0.361 | 0.067 | 0.213 | 0.505 |
| Manganese | Mn (ppm) | 895.978 | 138.118 | 487.058 | 1356.140 |
| Sodium | Na (wt%) | 0.513 | 0.065 | 0.266 | 0.611 |
| Phosphorus | P (wt%) | 0.058 | 0.012 | 0.035 | 0.101 |
| Lead | Pb (ppm) | 25.608 | 2.016 | 17.109 | 33.183 |
| Selenium | Se (ppm) | 0.350 | 0.071 | 0.201 | 0.587 |
| Titanium | Ti (wt%) | 0.299 | 0.028 | 0.234 | 0.366 |
| Zinc | Zn (ppm) | 78.311 | 9.454 | 54.062 | 122.986 |