| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.570 | 0.823 | 2.837 | 8.110 |
| Arsenic | As (ppm) | 1.068 | 0.590 | 0.300 | 4.230 |
| Calcium | Ca (wt%) | 1.560 | 0.602 | 0.637 | 4.898 |
| Copper | Cu (ppm) | 1.613 | 1.177 | 1.000 | 8.777 |
| Iron | Fe (wt%) | 3.367 | 1.340 | 1.577 | 12.691 |
| Mercury | Hg (ppm) | 0.043 | 0.018 | 0.010 | 0.115 |
| Magnesium | Mg (wt%) | 0.532 | 0.175 | 0.260 | 1.276 |
| Manganese | Mn (ppm) | 659.251 | 216.393 | 379.497 | 1707.290 |
| Sodium | Na (wt%) | 1.194 | 0.179 | 0.838 | 1.602 |
| Phosphorus | P (wt%) | 0.059 | 0.018 | 0.017 | 0.115 |
| Lead | Pb (ppm) | 16.931 | 3.663 | 9.306 | 27.596 |
| Selenium | Se (ppm) | 0.168 | 0.084 | 0.100 | 0.499 |
| Titanium | Ti (wt%) | 0.731 | 0.202 | 0.231 | 1.629 |
| Zinc | Zn (ppm) | 49.128 | 12.518 | 20.718 | 88.921 |