| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.963 | 0.568 | 2.704 | 6.458 |
| Arsenic | As (ppm) | 7.363 | 2.805 | 3.471 | 20.438 |
| Calcium | Ca (wt%) | 0.803 | 0.105 | 0.356 | 1.094 |
| Copper | Cu (ppm) | 13.258 | 2.480 | 7.087 | 20.747 |
| Iron | Fe (wt%) | 1.815 | 0.299 | 1.175 | 2.731 |
| Mercury | Hg (ppm) | 0.049 | 0.018 | 0.021 | 0.126 |
| Magnesium | Mg (wt%) | 0.560 | 0.112 | 0.218 | 0.840 |
| Manganese | Mn (ppm) | 386.611 | 77.953 | 192.707 | 599.667 |
| Sodium | Na (wt%) | 0.866 | 0.113 | 0.477 | 1.113 |
| Phosphorus | P (wt%) | 0.069 | 0.014 | 0.030 | 0.109 |
| Lead | Pb (ppm) | 21.258 | 4.251 | 10.939 | 32.747 |
| Selenium | Se (ppm) | 0.317 | 0.091 | 0.115 | 0.661 |
| Titanium | Ti (wt%) | 0.253 | 0.021 | 0.201 | 0.306 |
| Zinc | Zn (ppm) | 85.425 | 16.288 | 35.343 | 127.389 |