| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.647 | 0.453 | 4.236 | 6.860 |
| Arsenic | As (ppm) | 4.435 | 1.578 | 1.761 | 10.994 |
| Calcium | Ca (wt%) | 1.782 | 0.705 | 0.472 | 6.066 |
| Copper | Cu (ppm) | 13.780 | 5.922 | 3.553 | 40.975 |
| Iron | Fe (wt%) | 3.111 | 0.752 | 1.838 | 5.756 |
| Mercury | Hg (ppm) | 0.026 | 0.010 | 0.010 | 0.050 |
| Magnesium | Mg (wt%) | 0.625 | 0.160 | 0.203 | 1.024 |
| Manganese | Mn (ppm) | 949.071 | 815.689 | 165.063 | 5378.290 |
| Sodium | Na (wt%) | 1.176 | 0.222 | 0.825 | 1.919 |
| Phosphorus | P (wt%) | 0.063 | 0.027 | 0.016 | 0.172 |
| Lead | Pb (ppm) | 48.203 | 39.050 | 18.164 | 225.066 |
| Selenium | Se (ppm) | 0.210 | 0.153 | 0.100 | 0.987 |
| Titanium | Ti (wt%) | 0.370 | 0.087 | 0.167 | 0.613 |
| Zinc | Zn (ppm) | 71.515 | 16.470 | 33.164 | 130.586 |