| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.115 | 0.661 | 1.234 | 4.785 |
| Arsenic | As (ppm) | 8.286 | 3.347 | 2.578 | 31.877 |
| Calcium | Ca (wt%) | 0.403 | 0.806 | 0.067 | 9.113 |
| Copper | Cu (ppm) | 11.137 | 3.130 | 3.537 | 21.750 |
| Iron | Fe (wt%) | 2.281 | 0.482 | 0.945 | 4.073 |
| Mercury | Hg (ppm) | 0.087 | 0.032 | 0.014 | 0.235 |
| Magnesium | Mg (wt%) | 0.242 | 0.095 | 0.084 | 1.056 |
| Manganese | Mn (ppm) | 814.715 | 362.146 | 155.031 | 3203.650 |
| Sodium | Na (wt%) | 0.284 | 0.219 | 0.013 | 0.996 |
| Phosphorus | P (wt%) | 0.024 | 0.012 | 0.004 | 0.148 |
| Lead | Pb (ppm) | 21.087 | 6.433 | 10.099 | 58.398 |
| Selenium | Se (ppm) | 0.354 | 0.089 | 0.156 | 0.686 |
| Titanium | Ti (wt%) | 0.345 | 0.072 | 0.158 | 0.543 |
| Zinc | Zn (ppm) | 50.049 | 15.830 | 21.743 | 157.902 |