| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 8.537 | 1.321 | 5.537 | 12.866 |
| Arsenic | As (ppm) | 4.786 | 1.678 | 0.379 | 9.482 |
| Calcium | Ca (wt%) | 2.091 | 0.712 | 0.403 | 5.007 |
| Copper | Cu (ppm) | 57.993 | 19.322 | 5.799 | 102.835 |
| Iron | Fe (wt%) | 5.401 | 1.255 | 0.909 | 8.293 |
| Mercury | Hg (ppm) | 0.044 | 0.015 | 0.010 | 0.092 |
| Magnesium | Mg (wt%) | 1.489 | 0.744 | 0.176 | 4.721 |
| Manganese | Mn (ppm) | 1082.390 | 438.408 | 281.309 | 2843.490 |
| Sodium | Na (wt%) | 1.196 | 0.567 | 0.099 | 3.827 |
| Phosphorus | P (wt%) | 0.071 | 0.036 | 0.013 | 0.218 |
| Lead | Pb (ppm) | 15.169 | 5.912 | 2.209 | 30.430 |
| Selenium | Se (ppm) | 0.229 | 0.102 | 0.100 | 0.597 |
| Titanium | Ti (wt%) | 0.506 | 0.100 | 0.106 | 0.995 |
| Zinc | Zn (ppm) | 94.860 | 22.974 | 42.702 | 191.342 |