| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.234 | 0.580 | 1.167 | 4.787 |
| Arsenic | As (ppm) | 3.282 | 1.404 | 1.653 | 10.575 |
| Calcium | Ca (wt%) | 0.041 | 0.014 | 0.021 | 0.100 |
| Copper | Cu (ppm) | 4.426 | 0.655 | 3.276 | 7.187 |
| Iron | Fe (wt%) | 1.088 | 0.296 | 0.337 | 2.177 |
| Mercury | Hg (ppm) | 0.021 | 0.008 | 0.010 | 0.051 |
| Magnesium | Mg (wt%) | 0.035 | 0.007 | 0.022 | 0.068 |
| Manganese | Mn (ppm) | 86.873 | 24.069 | 41.682 | 187.851 |
| Sodium | Na (wt%) | 0.011 | 0.005 | 0.003 | 0.030 |
| Phosphorus | P (wt%) | 0.029 | 0.019 | 0.011 | 0.128 |
| Lead | Pb (ppm) | 18.871 | 2.406 | 10.716 | 25.680 |
| Selenium | Se (ppm) | 0.272 | 0.043 | 0.199 | 0.498 |
| Titanium | Ti (wt%) | 0.393 | 0.067 | 0.191 | 0.651 |
| Zinc | Zn (ppm) | 17.386 | 3.680 | 12.025 | 34.671 |