| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.702 | 0.739 | 0.717 | 4.449 |
| Arsenic | As (ppm) | 3.297 | 0.710 | 1.821 | 5.176 |
| Calcium | Ca (wt%) | 0.157 | 0.060 | 0.024 | 0.314 |
| Copper | Cu (ppm) | 7.487 | 2.169 | 1.142 | 13.931 |
| Iron | Fe (wt%) | 0.987 | 0.206 | 0.506 | 1.648 |
| Mercury | Hg (ppm) | 0.028 | 0.008 | 0.011 | 0.050 |
| Magnesium | Mg (wt%) | 0.160 | 0.093 | 0.028 | 0.640 |
| Manganese | Mn (ppm) | 458.748 | 178.619 | 99.547 | 947.874 |
| Sodium | Na (wt%) | 0.422 | 0.155 | 0.055 | 0.805 |
| Phosphorus | P (wt%) | 0.020 | 0.007 | 0.005 | 0.048 |
| Lead | Pb (ppm) | 15.870 | 1.931 | 8.188 | 19.105 |
| Selenium | Se (ppm) | 0.295 | 0.081 | 0.105 | 0.497 |
| Titanium | Ti (wt%) | 0.262 | 0.035 | 0.121 | 0.304 |
| Zinc | Zn (ppm) | 24.526 | 7.421 | 8.387 | 45.715 |