| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.286 | 0.309 | 0.639 | 2.390 |
| Arsenic | As (ppm) | 2.925 | 1.386 | 0.745 | 8.679 |
| Calcium | Ca (wt%) | 0.252 | 0.285 | 0.036 | 1.669 |
| Copper | Cu (ppm) | 4.708 | 1.496 | 3.000 | 13.132 |
| Iron | Fe (wt%) | 0.664 | 0.195 | 0.269 | 1.330 |
| Mercury | Hg (ppm) | 0.012 | 0.002 | 0.010 | 0.027 |
| Magnesium | Mg (wt%) | 0.085 | 0.027 | 0.035 | 0.192 |
| Manganese | Mn (ppm) | 403.870 | 386.441 | 65.166 | 3125.270 |
| Sodium | Na (wt%) | 0.081 | 0.035 | 0.010 | 0.179 |
| Phosphorus | P (wt%) | 0.012 | 0.003 | 0.005 | 0.021 |
| Lead | Pb (ppm) | 11.521 | 3.827 | 5.015 | 27.953 |
| Selenium | Se (ppm) | 0.128 | 0.032 | 0.100 | 0.284 |
| Titanium | Ti (wt%) | 0.156 | 0.027 | 0.086 | 0.209 |
| Zinc | Zn (ppm) | 14.532 | 3.357 | 4.021 | 26.000 |