| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.325 | 0.684 | 4.443 | 9.048 |
| Arsenic | As (ppm) | 28.445 | 22.982 | 1.953 | 220.320 |
| Calcium | Ca (wt%) | 4.013 | 1.995 | 0.843 | 16.940 |
| Copper | Cu (ppm) | 28.691 | 20.903 | 8.283 | 485.668 |
| Iron | Fe (wt%) | 3.760 | 1.054 | 1.494 | 12.512 |
| Mercury | Hg (ppm) | 0.194 | 0.495 | 0.010 | 5.356 |
| Magnesium | Mg (wt%) | 1.133 | 0.306 | 0.420 | 3.686 |
| Manganese | Mn (ppm) | 848.612 | 195.517 | 318.506 | 3198.760 |
| Sodium | Na (wt%) | 1.801 | 0.544 | 0.422 | 3.298 |
| Phosphorus | P (wt%) | 0.093 | 0.020 | 0.043 | 0.214 |
| Lead | Pb (ppm) | 22.189 | 10.369 | 6.752 | 164.698 |
| Selenium | Se (ppm) | 0.620 | 0.718 | 0.100 | 12.409 |
| Titanium | Ti (wt%) | 0.398 | 0.117 | 0.143 | 1.239 |
| Zinc | Zn (ppm) | 94.566 | 37.608 | 24.002 | 779.710 |