| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.987 | 0.426 | 0.324 | 2.897 |
| Arsenic | As (ppm) | 3.163 | 0.958 | 1.649 | 7.322 |
| Calcium | Ca (wt%) | 0.035 | 0.009 | 0.016 | 0.077 |
| Copper | Cu (ppm) | 2.893 | 0.891 | 1.165 | 6.702 |
| Iron | Fe (wt%) | 0.827 | 0.234 | 0.441 | 1.971 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.038 |
| Magnesium | Mg (wt%) | 0.047 | 0.016 | 0.018 | 0.108 |
| Manganese | Mn (ppm) | 288.031 | 177.531 | 99.915 | 1467.070 |
| Sodium | Na (wt%) | 0.056 | 0.020 | 0.020 | 0.123 |
| Phosphorus | P (wt%) | 0.012 | 0.004 | 0.004 | 0.035 |
| Lead | Pb (ppm) | 18.235 | 3.073 | 6.676 | 28.466 |
| Selenium | Se (ppm) | 0.180 | 0.109 | 0.102 | 0.902 |
| Titanium | Ti (wt%) | 0.431 | 0.065 | 0.196 | 0.632 |
| Zinc | Zn (ppm) | 15.610 | 4.394 | 6.648 | 39.817 |