| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.882 | 0.778 | 2.849 | 7.406 |
| Arsenic | As (ppm) | 4.747 | 1.693 | 2.412 | 14.617 |
| Calcium | Ca (wt%) | 0.365 | 0.082 | 0.198 | 0.741 |
| Copper | Cu (ppm) | 8.332 | 3.695 | 2.572 | 18.266 |
| Iron | Fe (wt%) | 3.104 | 1.083 | 1.358 | 7.670 |
| Mercury | Hg (ppm) | 0.376 | 0.250 | 0.121 | 1.656 |
| Magnesium | Mg (wt%) | 0.202 | 0.097 | 0.100 | 0.663 |
| Manganese | Mn (ppm) | 678.719 | 335.453 | 235.569 | 1943.440 |
| Sodium | Na (wt%) | 0.710 | 0.165 | 0.448 | 1.362 |
| Phosphorus | P (wt%) | 0.034 | 0.017 | 0.008 | 0.087 |
| Lead | Pb (ppm) | 37.529 | 6.012 | 20.043 | 59.314 |
| Selenium | Se (ppm) | 0.351 | 0.123 | 0.125 | 0.681 |
| Titanium | Ti (wt%) | 0.837 | 0.255 | 0.451 | 1.737 |
| Zinc | Zn (ppm) | 59.624 | 13.498 | 21.870 | 131.177 |