| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.038 | 0.441 | 0.315 | 2.491 |
| Arsenic | As (ppm) | 3.170 | 0.786 | 1.274 | 5.495 |
| Calcium | Ca (wt%) | 0.054 | 0.017 | 0.021 | 0.124 |
| Copper | Cu (ppm) | 2.776 | 0.846 | 1.159 | 5.260 |
| Iron | Fe (wt%) | 0.863 | 0.206 | 0.373 | 1.579 |
| Mercury | Hg (ppm) | 0.013 | 0.004 | 0.010 | 0.024 |
| Magnesium | Mg (wt%) | 0.054 | 0.020 | 0.015 | 0.131 |
| Manganese | Mn (ppm) | 255.014 | 81.172 | 92.144 | 652.797 |
| Sodium | Na (wt%) | 0.097 | 0.037 | 0.030 | 0.271 |
| Phosphorus | P (wt%) | 0.015 | 0.005 | 0.006 | 0.033 |
| Lead | Pb (ppm) | 15.383 | 2.965 | 7.845 | 25.850 |
| Selenium | Se (ppm) | 0.129 | 0.024 | 0.101 | 0.198 |
| Titanium | Ti (wt%) | 0.416 | 0.080 | 0.218 | 0.710 |
| Zinc | Zn (ppm) | 15.887 | 4.309 | 6.983 | 26.364 |