| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.924 | 0.539 | 0.702 | 3.386 |
| Arsenic | As (ppm) | 2.565 | 0.405 | 1.388 | 3.490 |
| Calcium | Ca (wt%) | 0.047 | 0.018 | 0.021 | 0.124 |
| Copper | Cu (ppm) | 4.206 | 1.058 | 2.144 | 7.464 |
| Iron | Fe (wt%) | 0.967 | 0.201 | 0.409 | 1.457 |
| Mercury | Hg (ppm) | 0.020 | 0.006 | 0.010 | 0.043 |
| Magnesium | Mg (wt%) | 0.034 | 0.010 | 0.019 | 0.075 |
| Manganese | Mn (ppm) | 93.937 | 28.204 | 54.333 | 231.714 |
| Sodium | Na (wt%) | 0.008 | 0.003 | 0.003 | 0.019 |
| Phosphorus | P (wt%) | 0.033 | 0.018 | 0.010 | 0.121 |
| Lead | Pb (ppm) | 17.478 | 2.835 | 5.762 | 26.386 |
| Selenium | Se (ppm) | 0.267 | 0.069 | 0.110 | 0.419 |
| Titanium | Ti (wt%) | 0.385 | 0.048 | 0.247 | 0.592 |
| Zinc | Zn (ppm) | 17.529 | 4.002 | 8.954 | 33.721 |