| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.029 | 0.822 | 3.728 | 7.456 |
| Arsenic | As (ppm) | 10.247 | 2.423 | 4.775 | 19.252 |
| Calcium | Ca (wt%) | 0.810 | 0.157 | 0.411 | 1.429 |
| Copper | Cu (ppm) | 19.781 | 3.873 | 10.185 | 29.029 |
| Iron | Fe (wt%) | 2.412 | 0.511 | 1.131 | 3.453 |
| Mercury | Hg (ppm) | 0.050 | 0.009 | 0.021 | 0.068 |
| Magnesium | Mg (wt%) | 0.686 | 0.158 | 0.284 | 0.991 |
| Manganese | Mn (ppm) | 466.050 | 107.912 | 164.352 | 806.756 |
| Sodium | Na (wt%) | 0.706 | 0.095 | 0.450 | 0.974 |
| Phosphorus | P (wt%) | 0.059 | 0.013 | 0.025 | 0.087 |
| Lead | Pb (ppm) | 31.517 | 10.077 | 10.784 | 71.511 |
| Selenium | Se (ppm) | 0.531 | 0.093 | 0.250 | 0.845 |
| Titanium | Ti (wt%) | 0.279 | 0.030 | 0.205 | 0.331 |
| Zinc | Zn (ppm) | 81.641 | 16.976 | 31.926 | 128.269 |