| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.254 | 0.363 | 0.567 | 2.007 |
| Arsenic | As (ppm) | 2.109 | 0.330 | 1.334 | 3.309 |
| Calcium | Ca (wt%) | 0.037 | 0.013 | 0.016 | 0.079 |
| Copper | Cu (ppm) | 6.396 | 3.368 | 1.466 | 16.771 |
| Iron | Fe (wt%) | 0.657 | 0.177 | 0.387 | 0.997 |
| Mercury | Hg (ppm) | 0.017 | 0.008 | 0.010 | 0.039 |
| Magnesium | Mg (wt%) | 0.058 | 0.023 | 0.021 | 0.132 |
| Manganese | Mn (ppm) | 174.192 | 76.943 | 50.871 | 355.120 |
| Sodium | Na (wt%) | 0.094 | 0.049 | 0.023 | 0.270 |
| Phosphorus | P (wt%) | 0.011 | 0.003 | 0.006 | 0.017 |
| Lead | Pb (ppm) | 13.255 | 6.176 | 6.457 | 31.593 |
| Selenium | Se (ppm) | 0.206 | 0.037 | 0.113 | 0.297 |
| Titanium | Ti (wt%) | 0.197 | 0.024 | 0.157 | 0.254 |
| Zinc | Zn (ppm) | 17.190 | 7.191 | 9.168 | 37.572 |