| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.721 | 0.629 | 0.563 | 3.865 |
| Arsenic | As (ppm) | 2.380 | 0.538 | 1.221 | 4.686 |
| Calcium | Ca (wt%) | 0.147 | 0.102 | 0.023 | 0.543 |
| Copper | Cu (ppm) | 6.161 | 2.301 | 1.099 | 14.607 |
| Iron | Fe (wt%) | 0.633 | 0.291 | 0.171 | 1.873 |
| Mercury | Hg (ppm) | 0.021 | 0.014 | 0.010 | 0.083 |
| Magnesium | Mg (wt%) | 0.107 | 0.083 | 0.019 | 0.525 |
| Manganese | Mn (ppm) | 160.453 | 92.196 | 32.910 | 544.867 |
| Sodium | Na (wt%) | 0.272 | 0.176 | 0.018 | 1.003 |
| Phosphorus | P (wt%) | 0.013 | 0.010 | 0.003 | 0.057 |
| Lead | Pb (ppm) | 11.504 | 3.828 | 2.398 | 24.797 |
| Selenium | Se (ppm) | 0.196 | 0.119 | 0.100 | 0.740 |
| Titanium | Ti (wt%) | 0.227 | 0.052 | 0.066 | 0.497 |
| Zinc | Zn (ppm) | 14.949 | 7.502 | 3.369 | 45.463 |