| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.397 | 0.681 | 4.569 | 9.708 |
| Arsenic | As (ppm) | 3.739 | 1.369 | 1.434 | 14.628 |
| Calcium | Ca (wt%) | 2.491 | 0.710 | 0.564 | 5.875 |
| Copper | Cu (ppm) | 22.088 | 14.275 | 6.431 | 120.949 |
| Iron | Fe (wt%) | 5.431 | 1.936 | 1.633 | 11.475 |
| Mercury | Hg (ppm) | 0.021 | 0.013 | 0.010 | 0.088 |
| Magnesium | Mg (wt%) | 1.166 | 0.342 | 0.422 | 2.793 |
| Manganese | Mn (ppm) | 1011.810 | 437.172 | 312.011 | 3123.360 |
| Sodium | Na (wt%) | 1.894 | 0.293 | 0.374 | 2.788 |
| Phosphorus | P (wt%) | 0.095 | 0.033 | 0.014 | 0.219 |
| Lead | Pb (ppm) | 13.154 | 3.045 | 5.336 | 28.928 |
| Selenium | Se (ppm) | 0.135 | 0.075 | 0.100 | 0.588 |
| Titanium | Ti (wt%) | 0.746 | 0.212 | 0.254 | 1.485 |
| Zinc | Zn (ppm) | 95.374 | 24.915 | 41.384 | 158.208 |