| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.773 | 0.796 | 4.971 | 8.629 |
| Arsenic | As (ppm) | 5.793 | 3.507 | 1.551 | 22.283 |
| Calcium | Ca (wt%) | 2.753 | 1.545 | 1.216 | 9.353 |
| Copper | Cu (ppm) | 13.422 | 3.611 | 4.853 | 19.966 |
| Iron | Fe (wt%) | 2.280 | 0.346 | 1.104 | 3.316 |
| Mercury | Hg (ppm) | 0.079 | 0.157 | 0.010 | 0.767 |
| Magnesium | Mg (wt%) | 0.761 | 0.287 | 0.211 | 1.588 |
| Manganese | Mn (ppm) | 472.902 | 53.028 | 354.530 | 617.950 |
| Sodium | Na (wt%) | 1.719 | 0.383 | 1.022 | 3.094 |
| Phosphorus | P (wt%) | 0.063 | 0.018 | 0.031 | 0.124 |
| Lead | Pb (ppm) | 22.937 | 4.797 | 12.037 | 32.983 |
| Selenium | Se (ppm) | 0.131 | 0.037 | 0.100 | 0.298 |
| Titanium | Ti (wt%) | 0.344 | 0.060 | 0.173 | 0.533 |
| Zinc | Zn (ppm) | 56.476 | 6.641 | 22.959 | 77.539 |