| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.805 | 0.324 | 4.067 | 5.415 |
| Arsenic | As (ppm) | 4.503 | 1.198 | 2.242 | 6.339 |
| Calcium | Ca (wt%) | 3.273 | 1.281 | 0.680 | 6.107 |
| Copper | Cu (ppm) | 22.904 | 15.828 | 1.212 | 77.162 |
| Iron | Fe (wt%) | 2.483 | 0.331 | 1.995 | 3.859 |
| Mercury | Hg (ppm) | 0.014 | 0.003 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.782 | 0.307 | 0.251 | 1.619 |
| Manganese | Mn (ppm) | 424.807 | 119.371 | 295.869 | 1230.900 |
| Sodium | Na (wt%) | 1.169 | 0.148 | 0.914 | 1.520 |
| Phosphorus | P (wt%) | 0.035 | 0.010 | 0.015 | 0.067 |
| Lead | Pb (ppm) | 35.723 | 17.722 | 14.095 | 95.478 |
| Selenium | Se (ppm) | 0.120 | 0.021 | 0.100 | 0.177 |
| Titanium | Ti (wt%) | 0.363 | 0.034 | 0.306 | 0.507 |
| Zinc | Zn (ppm) | 65.304 | 15.889 | 37.440 | 107.322 |