| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.856 | 0.451 | 0.224 | 2.854 |
| Arsenic | As (ppm) | 1.811 | 0.580 | 0.859 | 4.945 |
| Calcium | Ca (wt%) | 0.026 | 0.011 | 0.005 | 0.063 |
| Copper | Cu (ppm) | 3.232 | 1.296 | 1.080 | 8.024 |
| Iron | Fe (wt%) | 0.535 | 0.182 | 0.169 | 1.390 |
| Mercury | Hg (ppm) | 0.013 | 0.004 | 0.010 | 0.035 |
| Magnesium | Mg (wt%) | 0.036 | 0.017 | 0.012 | 0.114 |
| Manganese | Mn (ppm) | 281.430 | 121.038 | 78.846 | 855.614 |
| Sodium | Na (wt%) | 0.043 | 0.023 | 0.006 | 0.137 |
| Phosphorus | P (wt%) | 0.012 | 0.005 | 0.003 | 0.036 |
| Lead | Pb (ppm) | 9.740 | 3.075 | 2.567 | 19.281 |
| Selenium | Se (ppm) | 0.170 | 0.112 | 0.100 | 0.869 |
| Titanium | Ti (wt%) | 0.231 | 0.071 | 0.081 | 0.387 |
| Zinc | Zn (ppm) | 13.251 | 4.664 | 5.540 | 29.979 |