| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.862 | 1.101 | 2.067 | 8.025 |
| Arsenic | As (ppm) | 10.231 | 3.057 | 2.668 | 16.502 |
| Calcium | Ca (wt%) | 0.686 | 0.141 | 0.229 | 0.899 |
| Copper | Cu (ppm) | 21.506 | 5.279 | 5.738 | 33.780 |
| Iron | Fe (wt%) | 2.553 | 0.563 | 0.836 | 3.796 |
| Mercury | Hg (ppm) | 0.060 | 0.012 | 0.017 | 0.094 |
| Magnesium | Mg (wt%) | 0.611 | 0.192 | 0.133 | 1.099 |
| Manganese | Mn (ppm) | 452.456 | 105.849 | 257.486 | 703.807 |
| Sodium | Na (wt%) | 0.538 | 0.076 | 0.297 | 0.731 |
| Phosphorus | P (wt%) | 0.050 | 0.015 | 0.020 | 0.087 |
| Lead | Pb (ppm) | 27.221 | 3.781 | 12.092 | 33.869 |
| Selenium | Se (ppm) | 0.548 | 0.168 | 0.143 | 0.988 |
| Titanium | Ti (wt%) | 0.309 | 0.017 | 0.260 | 0.346 |
| Zinc | Zn (ppm) | 127.057 | 45.718 | 39.018 | 303.892 |