| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.755 | 0.794 | 4.293 | 9.057 |
| Arsenic | As (ppm) | 12.127 | 2.603 | 6.100 | 17.710 |
| Calcium | Ca (wt%) | 0.319 | 0.081 | 0.135 | 0.593 |
| Copper | Cu (ppm) | 21.926 | 8.418 | 10.157 | 48.639 |
| Iron | Fe (wt%) | 2.793 | 0.483 | 1.584 | 4.206 |
| Mercury | Hg (ppm) | 0.033 | 0.010 | 0.010 | 0.068 |
| Magnesium | Mg (wt%) | 0.522 | 0.133 | 0.335 | 1.085 |
| Manganese | Mn (ppm) | 384.143 | 89.738 | 152.310 | 619.869 |
| Sodium | Na (wt%) | 0.607 | 0.053 | 0.420 | 0.746 |
| Phosphorus | P (wt%) | 0.034 | 0.007 | 0.019 | 0.048 |
| Lead | Pb (ppm) | 18.755 | 3.119 | 8.836 | 30.084 |
| Selenium | Se (ppm) | 0.292 | 0.086 | 0.104 | 0.593 |
| Titanium | Ti (wt%) | 0.373 | 0.020 | 0.333 | 0.409 |
| Zinc | Zn (ppm) | 76.805 | 7.169 | 61.621 | 98.201 |