| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.146 | 0.963 | 1.374 | 7.173 |
| Arsenic | As (ppm) | 5.116 | 2.272 | 1.583 | 23.743 |
| Calcium | Ca (wt%) | 3.172 | 1.854 | 1.205 | 13.174 |
| Copper | Cu (ppm) | 15.504 | 6.349 | 4.404 | 52.215 |
| Iron | Fe (wt%) | 2.195 | 0.644 | 0.597 | 4.558 |
| Mercury | Hg (ppm) | 0.234 | 0.850 | 0.010 | 11.620 |
| Magnesium | Mg (wt%) | 1.190 | 0.471 | 0.533 | 3.641 |
| Manganese | Mn (ppm) | 387.638 | 131.085 | 95.848 | 906.173 |
| Sodium | Na (wt%) | 1.137 | 0.584 | 0.148 | 2.866 |
| Phosphorus | P (wt%) | 0.073 | 0.018 | 0.023 | 0.179 |
| Lead | Pb (ppm) | 15.072 | 4.426 | 2.523 | 38.770 |
| Selenium | Se (ppm) | 0.521 | 0.474 | 0.114 | 3.397 |
| Titanium | Ti (wt%) | 0.221 | 0.038 | 0.067 | 0.377 |
| Zinc | Zn (ppm) | 54.645 | 11.651 | 14.214 | 102.939 |