| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.978 | 0.389 | 0.335 | 2.176 |
| Arsenic | As (ppm) | 3.063 | 1.079 | 1.093 | 6.919 |
| Calcium | Ca (wt%) | 0.043 | 0.034 | 0.009 | 0.174 |
| Copper | Cu (ppm) | 6.810 | 4.829 | 1.323 | 25.990 |
| Iron | Fe (wt%) | 1.178 | 0.539 | 0.361 | 3.593 |
| Mercury | Hg (ppm) | 0.063 | 0.029 | 0.035 | 0.130 |
| Magnesium | Mg (wt%) | 0.044 | 0.022 | 0.012 | 0.118 |
| Manganese | Mn (ppm) | 216.722 | 90.228 | 59.485 | 655.671 |
| Sodium | Na (wt%) | 0.027 | 0.013 | 0.004 | 0.065 |
| Phosphorus | P (wt%) | 0.017 | 0.016 | 0.003 | 0.075 |
| Lead | Pb (ppm) | 50.433 | 24.770 | 14.939 | 131.402 |
| Selenium | Se (ppm) | 0.331 | 0.207 | 0.105 | 0.946 |
| Titanium | Ti (wt%) | 0.738 | 0.180 | 0.319 | 1.150 |
| Zinc | Zn (ppm) | 32.696 | 17.863 | 8.303 | 86.681 |