| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.577 | 0.219 | 4.979 | 6.222 |
| Arsenic | As (ppm) | 2.193 | 1.369 | 0.316 | 10.485 |
| Calcium | Ca (wt%) | 1.350 | 0.242 | 0.774 | 2.105 |
| Copper | Cu (ppm) | 6.462 | 1.810 | 2.668 | 15.062 |
| Iron | Fe (wt%) | 1.418 | 0.400 | 0.690 | 3.446 |
| Mercury | Hg (ppm) | 0.043 | 0.013 | 0.016 | 0.123 |
| Magnesium | Mg (wt%) | 0.359 | 0.091 | 0.168 | 0.626 |
| Manganese | Mn (ppm) | 884.480 | 330.647 | 408.904 | 3158.530 |
| Sodium | Na (wt%) | 1.848 | 0.130 | 1.474 | 2.168 |
| Phosphorus | P (wt%) | 0.061 | 0.013 | 0.037 | 0.108 |
| Lead | Pb (ppm) | 38.060 | 10.651 | 22.533 | 110.242 |
| Selenium | Se (ppm) | 0.113 | 0.028 | 0.100 | 0.299 |
| Titanium | Ti (wt%) | 0.433 | 0.150 | 0.232 | 1.614 |
| Zinc | Zn (ppm) | 28.439 | 9.023 | 12.906 | 76.958 |