| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.274 | 0.839 | 0.261 | 5.829 |
| Arsenic | As (ppm) | 1.529 | 0.727 | 0.506 | 5.918 |
| Calcium | Ca (wt%) | 0.162 | 0.206 | 0.015 | 2.189 |
| Copper | Cu (ppm) | 2.287 | 0.730 | 1.036 | 4.462 |
| Iron | Fe (wt%) | 0.505 | 0.406 | 0.111 | 2.775 |
| Mercury | Hg (ppm) | 0.022 | 0.008 | 0.010 | 0.053 |
| Magnesium | Mg (wt%) | 0.034 | 0.015 | 0.009 | 0.081 |
| Manganese | Mn (ppm) | 119.274 | 62.107 | 16.963 | 387.563 |
| Sodium | Na (wt%) | 0.006 | 0.002 | 0.003 | 0.010 |
| Phosphorus | P (wt%) | 0.053 | 0.033 | 0.012 | 0.194 |
| Lead | Pb (ppm) | 13.758 | 5.330 | 3.635 | 41.768 |
| Selenium | Se (ppm) | 0.191 | 0.079 | 0.103 | 0.657 |
| Titanium | Ti (wt%) | 0.342 | 0.065 | 0.161 | 0.476 |
| Zinc | Zn (ppm) | 10.481 | 4.811 | 2.177 | 28.318 |