| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.494 | 0.610 | 3.461 | 9.093 |
| Arsenic | As (ppm) | 3.641 | 2.370 | 0.314 | 15.016 |
| Calcium | Ca (wt%) | 1.944 | 0.658 | 0.340 | 4.799 |
| Copper | Cu (ppm) | 14.914 | 4.677 | 5.331 | 35.730 |
| Iron | Fe (wt%) | 2.843 | 0.493 | 1.227 | 5.354 |
| Mercury | Hg (ppm) | 0.053 | 0.016 | 0.016 | 0.125 |
| Magnesium | Mg (wt%) | 0.942 | 0.381 | 0.304 | 2.610 |
| Manganese | Mn (ppm) | 883.411 | 315.097 | 297.001 | 3075.420 |
| Sodium | Na (wt%) | 1.085 | 0.257 | 0.446 | 1.848 |
| Phosphorus | P (wt%) | 0.080 | 0.012 | 0.039 | 0.129 |
| Lead | Pb (ppm) | 40.394 | 25.933 | 15.248 | 196.730 |
| Selenium | Se (ppm) | 0.195 | 0.063 | 0.101 | 0.398 |
| Titanium | Ti (wt%) | 0.511 | 0.142 | 0.144 | 0.953 |
| Zinc | Zn (ppm) | 74.581 | 21.015 | 26.313 | 144.866 |