| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.102 | 1.035 | 1.254 | 8.179 |
| Arsenic | As (ppm) | 16.379 | 17.144 | 3.240 | 161.377 |
| Calcium | Ca (wt%) | 3.342 | 2.719 | 0.491 | 22.567 |
| Copper | Cu (ppm) | 53.618 | 72.276 | 6.339 | 619.877 |
| Iron | Fe (wt%) | 3.000 | 1.009 | 0.582 | 8.481 |
| Mercury | Hg (ppm) | 0.250 | 0.704 | 0.011 | 6.197 |
| Magnesium | Mg (wt%) | 1.364 | 0.773 | 0.415 | 7.366 |
| Manganese | Mn (ppm) | 610.906 | 325.845 | 149.816 | 2732.720 |
| Sodium | Na (wt%) | 0.840 | 0.273 | 0.132 | 1.766 |
| Phosphorus | P (wt%) | 0.074 | 0.020 | 0.033 | 0.154 |
| Lead | Pb (ppm) | 29.384 | 21.152 | 3.656 | 146.808 |
| Selenium | Se (ppm) | 0.428 | 0.158 | 0.103 | 1.980 |
| Titanium | Ti (wt%) | 0.309 | 0.093 | 0.066 | 0.836 |
| Zinc | Zn (ppm) | 96.397 | 51.275 | 26.354 | 445.128 |