| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.020 | 0.630 | 1.793 | 5.000 |
| Arsenic | As (ppm) | 6.278 | 1.192 | 4.024 | 10.718 |
| Calcium | Ca (wt%) | 0.222 | 0.063 | 0.134 | 0.538 |
| Copper | Cu (ppm) | 8.144 | 2.030 | 3.325 | 14.880 |
| Iron | Fe (wt%) | 1.744 | 0.240 | 1.114 | 2.341 |
| Mercury | Hg (ppm) | 0.048 | 0.013 | 0.020 | 0.080 |
| Magnesium | Mg (wt%) | 0.142 | 0.021 | 0.078 | 0.210 |
| Manganese | Mn (ppm) | 911.524 | 281.738 | 368.306 | 1773.130 |
| Sodium | Na (wt%) | 0.051 | 0.013 | 0.022 | 0.080 |
| Phosphorus | P (wt%) | 0.035 | 0.015 | 0.011 | 0.117 |
| Lead | Pb (ppm) | 23.369 | 3.454 | 16.790 | 34.616 |
| Selenium | Se (ppm) | 0.308 | 0.103 | 0.104 | 0.569 |
| Titanium | Ti (wt%) | 0.334 | 0.057 | 0.215 | 0.497 |
| Zinc | Zn (ppm) | 58.962 | 11.342 | 35.468 | 97.282 |