| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.577 | 0.873 | 0.404 | 6.590 |
| Arsenic | As (ppm) | 2.604 | 1.748 | 0.892 | 13.690 |
| Calcium | Ca (wt%) | 0.143 | 0.155 | 0.013 | 1.491 |
| Copper | Cu (ppm) | 6.844 | 3.121 | 1.322 | 17.746 |
| Iron | Fe (wt%) | 1.756 | 0.502 | 0.425 | 4.171 |
| Mercury | Hg (ppm) | 0.046 | 0.030 | 0.011 | 0.206 |
| Magnesium | Mg (wt%) | 0.081 | 0.051 | 0.014 | 0.244 |
| Manganese | Mn (ppm) | 407.816 | 103.027 | 76.345 | 961.315 |
| Sodium | Na (wt%) | 0.071 | 0.068 | 0.006 | 0.375 |
| Phosphorus | P (wt%) | 0.010 | 0.008 | 0.003 | 0.047 |
| Lead | Pb (ppm) | 21.766 | 4.185 | 8.386 | 45.747 |
| Selenium | Se (ppm) | 0.198 | 0.084 | 0.102 | 0.455 |
| Titanium | Ti (wt%) | 0.492 | 0.102 | 0.244 | 0.982 |
| Zinc | Zn (ppm) | 35.745 | 13.350 | 10.232 | 86.327 |