| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.106 | 0.943 | 1.244 | 4.896 |
| Arsenic | As (ppm) | 4.861 | 1.746 | 2.446 | 9.858 |
| Calcium | Ca (wt%) | 0.635 | 0.524 | 0.140 | 2.354 |
| Copper | Cu (ppm) | 6.293 | 1.813 | 3.013 | 8.954 |
| Iron | Fe (wt%) | 1.712 | 0.542 | 0.833 | 2.950 |
| Mercury | Hg (ppm) | 0.017 | 0.005 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.230 | 0.075 | 0.092 | 0.369 |
| Manganese | Mn (ppm) | 626.688 | 269.797 | 149.773 | 1252.710 |
| Sodium | Na (wt%) | 0.440 | 0.129 | 0.118 | 0.650 |
| Phosphorus | P (wt%) | 0.024 | 0.007 | 0.010 | 0.035 |
| Lead | Pb (ppm) | 16.554 | 4.700 | 6.029 | 26.433 |
| Selenium | Se (ppm) | 0.258 | 0.099 | 0.103 | 0.493 |
| Titanium | Ti (wt%) | 0.182 | 0.034 | 0.124 | 0.239 |
| Zinc | Zn (ppm) | 48.075 | 11.416 | 22.158 | 73.601 |