| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.506 | 0.398 | 2.721 | 4.395 |
| Arsenic | As (ppm) | 8.367 | 2.339 | 4.135 | 12.864 |
| Calcium | Ca (wt%) | 0.148 | 0.039 | 0.044 | 0.248 |
| Copper | Cu (ppm) | 7.272 | 1.443 | 3.262 | 11.684 |
| Iron | Fe (wt%) | 2.029 | 0.338 | 1.421 | 2.743 |
| Mercury | Hg (ppm) | 0.029 | 0.006 | 0.010 | 0.054 |
| Magnesium | Mg (wt%) | 0.293 | 0.039 | 0.209 | 0.403 |
| Manganese | Mn (ppm) | 1019.320 | 290.044 | 479.753 | 2182.980 |
| Sodium | Na (wt%) | 0.559 | 0.193 | 0.154 | 0.782 |
| Phosphorus | P (wt%) | 0.048 | 0.011 | 0.021 | 0.083 |
| Lead | Pb (ppm) | 25.688 | 9.926 | 12.021 | 54.672 |
| Selenium | Se (ppm) | 0.249 | 0.122 | 0.100 | 0.498 |
| Titanium | Ti (wt%) | 0.264 | 0.038 | 0.181 | 0.365 |
| Zinc | Zn (ppm) | 74.312 | 24.501 | 42.074 | 151.076 |