| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.097 | 1.012 | 0.598 | 4.969 |
| Arsenic | As (ppm) | 6.281 | 2.269 | 2.225 | 15.175 |
| Calcium | Ca (wt%) | 6.201 | 5.161 | 0.060 | 19.604 |
| Copper | Cu (ppm) | 9.466 | 5.189 | 1.098 | 20.355 |
| Iron | Fe (wt%) | 1.524 | 0.443 | 0.323 | 2.946 |
| Mercury | Hg (ppm) | 0.018 | 0.006 | 0.010 | 0.041 |
| Magnesium | Mg (wt%) | 0.343 | 0.188 | 0.024 | 0.769 |
| Manganese | Mn (ppm) | 313.411 | 155.680 | 46.410 | 902.174 |
| Sodium | Na (wt%) | 0.188 | 0.080 | 0.034 | 0.483 |
| Phosphorus | P (wt%) | 0.031 | 0.020 | 0.005 | 0.089 |
| Lead | Pb (ppm) | 16.219 | 8.182 | 2.994 | 47.480 |
| Selenium | Se (ppm) | 0.328 | 0.137 | 0.109 | 0.811 |
| Titanium | Ti (wt%) | 0.273 | 0.043 | 0.175 | 0.440 |
| Zinc | Zn (ppm) | 39.324 | 17.827 | 9.775 | 105.194 |