| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 8.179 | 1.154 | 5.564 | 10.307 |
| Arsenic | As (ppm) | 7.241 | 3.432 | 0.882 | 22.456 |
| Calcium | Ca (wt%) | 1.780 | 0.752 | 0.644 | 4.144 |
| Copper | Cu (ppm) | 29.353 | 11.708 | 5.790 | 49.798 |
| Iron | Fe (wt%) | 5.747 | 1.523 | 2.608 | 11.229 |
| Mercury | Hg (ppm) | 0.049 | 0.017 | 0.011 | 0.118 |
| Magnesium | Mg (wt%) | 1.188 | 0.568 | 0.235 | 3.092 |
| Manganese | Mn (ppm) | 1208.240 | 219.788 | 444.766 | 1900.300 |
| Sodium | Na (wt%) | 1.433 | 0.358 | 0.691 | 2.621 |
| Phosphorus | P (wt%) | 0.099 | 0.027 | 0.044 | 0.186 |
| Lead | Pb (ppm) | 16.004 | 4.358 | 5.362 | 26.808 |
| Selenium | Se (ppm) | 0.176 | 0.074 | 0.100 | 0.593 |
| Titanium | Ti (wt%) | 0.855 | 0.188 | 0.448 | 1.791 |
| Zinc | Zn (ppm) | 113.504 | 25.800 | 45.622 | 186.158 |