| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.920 | 0.564 | 2.535 | 6.710 |
| Arsenic | As (ppm) | 4.106 | 0.681 | 1.404 | 6.294 |
| Calcium | Ca (wt%) | 3.108 | 1.419 | 0.680 | 6.882 |
| Copper | Cu (ppm) | 13.160 | 2.995 | 6.192 | 24.799 |
| Iron | Fe (wt%) | 2.617 | 1.188 | 1.011 | 14.839 |
| Mercury | Hg (ppm) | 0.019 | 0.013 | 0.010 | 0.147 |
| Magnesium | Mg (wt%) | 0.739 | 0.216 | 0.290 | 1.649 |
| Manganese | Mn (ppm) | 461.317 | 91.352 | 173.954 | 774.578 |
| Sodium | Na (wt%) | 0.909 | 0.308 | 0.467 | 2.015 |
| Phosphorus | P (wt%) | 0.059 | 0.018 | 0.026 | 0.160 |
| Lead | Pb (ppm) | 21.046 | 5.237 | 8.237 | 52.207 |
| Selenium | Se (ppm) | 0.175 | 0.065 | 0.100 | 0.480 |
| Titanium | Ti (wt%) | 0.324 | 0.198 | 0.124 | 2.404 |
| Zinc | Zn (ppm) | 56.358 | 13.130 | 22.464 | 151.041 |