| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.392 | 0.682 | 1.179 | 4.986 |
| Arsenic | As (ppm) | 1.785 | 0.387 | 1.030 | 3.481 |
| Calcium | Ca (wt%) | 0.186 | 0.155 | 0.011 | 0.581 |
| Copper | Cu (ppm) | 5.672 | 1.843 | 1.108 | 10.100 |
| Iron | Fe (wt%) | 3.268 | 0.744 | 1.980 | 6.204 |
| Mercury | Hg (ppm) | 0.069 | 0.060 | 0.012 | 0.359 |
| Magnesium | Mg (wt%) | 0.094 | 0.035 | 0.012 | 0.169 |
| Manganese | Mn (ppm) | 481.225 | 59.081 | 347.098 | 731.596 |
| Sodium | Na (wt%) | 0.250 | 0.204 | 0.051 | 0.778 |
| Phosphorus | P (wt%) | 0.046 | 0.017 | 0.004 | 0.118 |
| Lead | Pb (ppm) | 37.384 | 8.258 | 19.252 | 65.613 |
| Selenium | Se (ppm) | 0.205 | 0.050 | 0.105 | 0.293 |
| Titanium | Ti (wt%) | 0.990 | 0.250 | 0.526 | 1.806 |
| Zinc | Zn (ppm) | 74.527 | 27.776 | 26.522 | 179.892 |