| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.403 | 0.253 | 0.683 | 2.691 |
| Arsenic | As (ppm) | 11.679 | 4.196 | 3.478 | 25.905 |
| Calcium | Ca (wt%) | 0.054 | 0.016 | 0.017 | 0.150 |
| Copper | Cu (ppm) | 3.468 | 0.372 | 2.232 | 4.680 |
| Iron | Fe (wt%) | 2.204 | 0.761 | 0.626 | 4.351 |
| Mercury | Hg (ppm) | 0.017 | 0.007 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.070 | 0.027 | 0.018 | 0.271 |
| Manganese | Mn (ppm) | 256.608 | 108.232 | 81.025 | 753.193 |
| Sodium | Na (wt%) | 0.046 | 0.014 | 0.025 | 0.089 |
| Phosphorus | P (wt%) | 0.022 | 0.004 | 0.011 | 0.034 |
| Lead | Pb (ppm) | 12.154 | 1.886 | 7.298 | 18.185 |
| Selenium | Se (ppm) | 0.269 | 0.066 | 0.107 | 0.537 |
| Titanium | Ti (wt%) | 0.411 | 0.067 | 0.259 | 0.618 |
| Zinc | Zn (ppm) | 30.819 | 7.470 | 12.101 | 71.443 |