| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.971 | 0.531 | 0.651 | 3.607 |
| Arsenic | As (ppm) | 3.860 | 1.007 | 1.220 | 6.252 |
| Calcium | Ca (wt%) | 0.045 | 0.014 | 0.011 | 0.087 |
| Copper | Cu (ppm) | 5.714 | 1.235 | 1.749 | 9.235 |
| Iron | Fe (wt%) | 1.175 | 0.232 | 0.557 | 1.818 |
| Mercury | Hg (ppm) | 0.033 | 0.010 | 0.013 | 0.061 |
| Magnesium | Mg (wt%) | 0.033 | 0.007 | 0.016 | 0.056 |
| Manganese | Mn (ppm) | 245.558 | 89.084 | 84.209 | 624.749 |
| Sodium | Na (wt%) | 0.007 | 0.002 | 0.003 | 0.014 |
| Phosphorus | P (wt%) | 0.022 | 0.003 | 0.010 | 0.031 |
| Lead | Pb (ppm) | 17.375 | 3.110 | 7.749 | 26.488 |
| Selenium | Se (ppm) | 0.255 | 0.060 | 0.106 | 0.403 |
| Titanium | Ti (wt%) | 0.394 | 0.080 | 0.183 | 0.687 |
| Zinc | Zn (ppm) | 19.491 | 4.588 | 5.188 | 30.620 |