| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.760 | 0.473 | 3.032 | 6.345 |
| Arsenic | As (ppm) | 4.429 | 0.762 | 2.336 | 6.491 |
| Calcium | Ca (wt%) | 1.877 | 0.496 | 0.667 | 3.914 |
| Copper | Cu (ppm) | 10.169 | 3.250 | 1.195 | 20.729 |
| Iron | Fe (wt%) | 2.871 | 0.861 | 1.332 | 6.254 |
| Mercury | Hg (ppm) | 0.019 | 0.006 | 0.010 | 0.044 |
| Magnesium | Mg (wt%) | 0.587 | 0.105 | 0.331 | 0.977 |
| Manganese | Mn (ppm) | 481.544 | 129.900 | 154.718 | 912.372 |
| Sodium | Na (wt%) | 0.845 | 0.124 | 0.454 | 1.189 |
| Phosphorus | P (wt%) | 0.060 | 0.039 | 0.021 | 0.260 |
| Lead | Pb (ppm) | 23.562 | 3.814 | 17.144 | 39.625 |
| Selenium | Se (ppm) | 0.165 | 0.042 | 0.100 | 0.297 |
| Titanium | Ti (wt%) | 0.355 | 0.077 | 0.191 | 0.606 |
| Zinc | Zn (ppm) | 58.264 | 14.643 | 25.699 | 119.561 |