| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.194 | 0.421 | 2.012 | 4.126 |
| Arsenic | As (ppm) | 0.827 | 0.177 | 0.331 | 1.178 |
| Calcium | Ca (wt%) | 0.142 | 0.091 | 0.061 | 0.504 |
| Copper | Cu (ppm) | 7.894 | 1.479 | 4.228 | 10.472 |
| Iron | Fe (wt%) | 2.416 | 0.908 | 0.547 | 4.728 |
| Mercury | Hg (ppm) | 0.050 | 0.012 | 0.021 | 0.077 |
| Magnesium | Mg (wt%) | 0.177 | 0.058 | 0.056 | 0.341 |
| Manganese | Mn (ppm) | 458.702 | 96.702 | 220.242 | 563.299 |
| Sodium | Na (wt%) | 0.148 | 0.035 | 0.089 | 0.264 |
| Phosphorus | P (wt%) | 0.011 | 0.003 | 0.003 | 0.017 |
| Lead | Pb (ppm) | 19.659 | 4.021 | 8.521 | 32.052 |
| Selenium | Se (ppm) | 0.136 | 0.021 | 0.102 | 0.193 |
| Titanium | Ti (wt%) | 0.559 | 0.158 | 0.189 | 0.824 |
| Zinc | Zn (ppm) | 35.802 | 5.187 | 19.769 | 42.910 |