| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.215 | 0.378 | 0.152 | 2.211 |
| Arsenic | As (ppm) | 2.518 | 1.539 | 0.805 | 12.807 |
| Calcium | Ca (wt%) | 0.028 | 0.014 | 0.003 | 0.072 |
| Copper | Cu (ppm) | 2.781 | 0.831 | 1.079 | 5.234 |
| Iron | Fe (wt%) | 0.851 | 0.312 | 0.084 | 2.400 |
| Mercury | Hg (ppm) | 0.015 | 0.005 | 0.010 | 0.038 |
| Magnesium | Mg (wt%) | 0.021 | 0.007 | 0.004 | 0.040 |
| Manganese | Mn (ppm) | 120.218 | 62.055 | 13.345 | 377.149 |
| Sodium | Na (wt%) | 0.015 | 0.010 | 0.003 | 0.071 |
| Phosphorus | P (wt%) | 0.019 | 0.008 | 0.004 | 0.039 |
| Lead | Pb (ppm) | 17.916 | 4.991 | 3.360 | 32.582 |
| Selenium | Se (ppm) | 0.200 | 0.054 | 0.106 | 0.425 |
| Titanium | Ti (wt%) | 0.409 | 0.106 | 0.106 | 0.688 |
| Zinc | Zn (ppm) | 12.883 | 4.107 | 1.780 | 26.020 |