| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.283 | 0.571 | 0.919 | 4.292 |
| Arsenic | As (ppm) | 4.178 | 1.152 | 2.493 | 9.960 |
| Calcium | Ca (wt%) | 0.073 | 0.029 | 0.031 | 0.177 |
| Copper | Cu (ppm) | 8.333 | 3.824 | 2.903 | 29.267 |
| Iron | Fe (wt%) | 1.003 | 0.216 | 0.538 | 1.812 |
| Mercury | Hg (ppm) | 0.028 | 0.007 | 0.011 | 0.049 |
| Magnesium | Mg (wt%) | 0.109 | 0.035 | 0.040 | 0.242 |
| Manganese | Mn (ppm) | 298.660 | 121.026 | 95.101 | 710.225 |
| Sodium | Na (wt%) | 0.143 | 0.047 | 0.058 | 0.291 |
| Phosphorus | P (wt%) | 0.019 | 0.007 | 0.010 | 0.051 |
| Lead | Pb (ppm) | 10.521 | 3.121 | 4.422 | 20.948 |
| Selenium | Se (ppm) | 0.341 | 0.082 | 0.120 | 0.569 |
| Titanium | Ti (wt%) | 0.316 | 0.027 | 0.210 | 0.373 |
| Zinc | Zn (ppm) | 26.318 | 8.975 | 11.929 | 69.337 |