| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.220 | 0.816 | 2.330 | 6.200 |
| Arsenic | As (ppm) | 5.358 | 1.030 | 3.740 | 8.670 |
| Calcium | Ca (wt%) | 0.868 | 0.325 | 0.348 | 1.755 |
| Copper | Cu (ppm) | 9.885 | 1.551 | 6.265 | 13.784 |
| Iron | Fe (wt%) | 1.718 | 0.320 | 1.152 | 2.749 |
| Mercury | Hg (ppm) | 0.013 | 0.003 | 0.010 | 0.024 |
| Magnesium | Mg (wt%) | 0.610 | 0.212 | 0.239 | 1.241 |
| Manganese | Mn (ppm) | 423.426 | 106.760 | 229.107 | 796.176 |
| Sodium | Na (wt%) | 0.728 | 0.198 | 0.212 | 1.018 |
| Phosphorus | P (wt%) | 0.032 | 0.008 | 0.015 | 0.054 |
| Lead | Pb (ppm) | 18.105 | 6.077 | 5.261 | 37.467 |
| Selenium | Se (ppm) | 0.190 | 0.052 | 0.101 | 0.299 |
| Titanium | Ti (wt%) | 0.282 | 0.043 | 0.158 | 0.343 |
| Zinc | Zn (ppm) | 33.534 | 7.044 | 21.148 | 56.158 |