| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.034 | 0.759 | 2.350 | 5.319 |
| Arsenic | As (ppm) | 0.776 | 0.177 | 0.328 | 1.072 |
| Calcium | Ca (wt%) | 0.599 | 0.274 | 0.227 | 1.251 |
| Copper | Cu (ppm) | 14.961 | 2.710 | 6.724 | 19.065 |
| Iron | Fe (wt%) | 4.309 | 0.911 | 1.979 | 6.133 |
| Mercury | Hg (ppm) | 0.058 | 0.014 | 0.023 | 0.090 |
| Magnesium | Mg (wt%) | 0.472 | 0.129 | 0.181 | 0.714 |
| Manganese | Mn (ppm) | 558.460 | 95.847 | 418.659 | 766.699 |
| Sodium | Na (wt%) | 0.359 | 0.091 | 0.137 | 0.527 |
| Phosphorus | P (wt%) | 0.015 | 0.005 | 0.009 | 0.032 |
| Lead | Pb (ppm) | 15.393 | 2.652 | 9.449 | 20.749 |
| Selenium | Se (ppm) | 0.147 | 0.034 | 0.102 | 0.247 |
| Titanium | Ti (wt%) | 0.893 | 0.186 | 0.558 | 1.360 |
| Zinc | Zn (ppm) | 67.868 | 10.145 | 33.589 | 78.150 |