| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.913 | 0.629 | 0.838 | 4.434 |
| Arsenic | As (ppm) | 6.840 | 2.223 | 3.649 | 15.562 |
| Calcium | Ca (wt%) | 0.113 | 0.065 | 0.021 | 0.287 |
| Copper | Cu (ppm) | 8.364 | 2.325 | 2.191 | 15.454 |
| Iron | Fe (wt%) | 1.520 | 0.225 | 0.863 | 2.390 |
| Mercury | Hg (ppm) | 0.032 | 0.011 | 0.010 | 0.076 |
| Magnesium | Mg (wt%) | 0.157 | 0.036 | 0.042 | 0.256 |
| Manganese | Mn (ppm) | 599.333 | 167.761 | 104.850 | 979.276 |
| Sodium | Na (wt%) | 0.172 | 0.107 | 0.030 | 0.578 |
| Phosphorus | P (wt%) | 0.028 | 0.004 | 0.016 | 0.046 |
| Lead | Pb (ppm) | 14.309 | 2.457 | 5.399 | 19.121 |
| Selenium | Se (ppm) | 0.326 | 0.109 | 0.103 | 0.692 |
| Titanium | Ti (wt%) | 0.267 | 0.057 | 0.081 | 0.369 |
| Zinc | Zn (ppm) | 39.370 | 8.501 | 18.845 | 86.432 |