| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.105 | 0.444 | 0.248 | 2.450 |
| Arsenic | As (ppm) | 5.425 | 2.437 | 1.168 | 14.052 |
| Calcium | Ca (wt%) | 0.066 | 0.028 | 0.017 | 0.143 |
| Copper | Cu (ppm) | 5.232 | 3.283 | 1.117 | 23.907 |
| Iron | Fe (wt%) | 1.850 | 0.901 | 0.432 | 4.842 |
| Mercury | Hg (ppm) | 0.009 | 0.003 | 0.005 | 0.019 |
| Magnesium | Mg (wt%) | 0.058 | 0.022 | 0.012 | 0.120 |
| Manganese | Mn (ppm) | 392.152 | 124.585 | 136.144 | 739.331 |
| Sodium | Na (wt%) | 0.065 | 0.027 | 0.014 | 0.153 |
| Phosphorus | P (wt%) | 0.026 | 0.015 | 0.006 | 0.084 |
| Lead | Pb (ppm) | 11.591 | 2.962 | 4.113 | 17.457 |
| Selenium | Se (ppm) | 0.143 | 0.045 | 0.101 | 0.292 |
| Titanium | Ti (wt%) | 0.491 | 0.263 | 0.149 | 1.596 |
| Zinc | Zn (ppm) | 20.795 | 7.251 | 7.181 | 39.879 |