| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.446 | 0.445 | 0.486 | 3.054 |
| Arsenic | As (ppm) | 2.163 | 0.441 | 1.123 | 4.370 |
| Calcium | Ca (wt%) | 0.343 | 0.225 | 0.039 | 1.307 |
| Copper | Cu (ppm) | 5.015 | 2.016 | 1.240 | 18.083 |
| Iron | Fe (wt%) | 1.187 | 0.537 | 0.388 | 3.460 |
| Mercury | Hg (ppm) | 0.035 | 0.013 | 0.011 | 0.087 |
| Magnesium | Mg (wt%) | 0.065 | 0.024 | 0.018 | 0.192 |
| Manganese | Mn (ppm) | 466.560 | 266.096 | 96.472 | 1584.680 |
| Sodium | Na (wt%) | 0.141 | 0.052 | 0.036 | 0.366 |
| Phosphorus | P (wt%) | 0.033 | 0.010 | 0.007 | 0.071 |
| Lead | Pb (ppm) | 18.848 | 5.959 | 10.748 | 45.483 |
| Selenium | Se (ppm) | 0.309 | 0.217 | 0.106 | 1.622 |
| Titanium | Ti (wt%) | 0.826 | 0.265 | 0.319 | 1.780 |
| Zinc | Zn (ppm) | 22.190 | 7.541 | 5.946 | 51.979 |