| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.084 | 0.843 | 0.560 | 5.186 |
| Arsenic | As (ppm) | 3.747 | 1.751 | 1.225 | 8.683 |
| Calcium | Ca (wt%) | 0.032 | 0.011 | 0.011 | 0.065 |
| Copper | Cu (ppm) | 6.205 | 2.634 | 2.443 | 16.781 |
| Iron | Fe (wt%) | 1.412 | 0.428 | 0.719 | 3.260 |
| Mercury | Hg (ppm) | 0.026 | 0.012 | 0.010 | 0.077 |
| Magnesium | Mg (wt%) | 0.099 | 0.061 | 0.016 | 0.321 |
| Manganese | Mn (ppm) | 287.864 | 69.531 | 163.019 | 546.477 |
| Sodium | Na (wt%) | 0.076 | 0.051 | 0.007 | 0.217 |
| Phosphorus | P (wt%) | 0.013 | 0.005 | 0.003 | 0.028 |
| Lead | Pb (ppm) | 17.217 | 2.477 | 10.130 | 36.045 |
| Selenium | Se (ppm) | 0.211 | 0.066 | 0.100 | 0.445 |
| Titanium | Ti (wt%) | 0.372 | 0.055 | 0.260 | 0.514 |
| Zinc | Zn (ppm) | 29.286 | 7.721 | 16.514 | 64.595 |