| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.567 | 0.660 | 0.572 | 8.443 |
| Arsenic | As (ppm) | 30.947 | 93.920 | 2.752 | 2019.810 |
| Calcium | Ca (wt%) | 5.107 | 2.077 | 0.794 | 15.992 |
| Copper | Cu (ppm) | 35.666 | 79.365 | 5.912 | 1475.600 |
| Iron | Fe (wt%) | 2.433 | 0.907 | 1.157 | 20.475 |
| Mercury | Hg (ppm) | 0.166 | 0.510 | 0.010 | 7.592 |
| Magnesium | Mg (wt%) | 1.610 | 0.702 | 0.308 | 10.193 |
| Manganese | Mn (ppm) | 589.661 | 272.414 | 176.865 | 6078.480 |
| Sodium | Na (wt%) | 1.030 | 0.464 | 0.107 | 8.109 |
| Phosphorus | P (wt%) | 0.077 | 0.017 | 0.011 | 0.341 |
| Lead | Pb (ppm) | 24.711 | 14.412 | 6.287 | 259.728 |
| Selenium | Se (ppm) | 0.706 | 1.331 | 0.100 | 21.721 |
| Titanium | Ti (wt%) | 0.269 | 0.061 | 0.023 | 0.871 |
| Zinc | Zn (ppm) | 131.927 | 287.999 | 39.258 | 6318.230 |