| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 8.316 | 0.433 | 6.002 | 9.808 |
| Arsenic | As (ppm) | 5.057 | 2.985 | 1.629 | 30.680 |
| Calcium | Ca (wt%) | 2.849 | 0.720 | 1.095 | 7.312 |
| Copper | Cu (ppm) | 45.747 | 25.243 | 15.350 | 175.176 |
| Iron | Fe (wt%) | 4.780 | 1.337 | 2.581 | 19.243 |
| Mercury | Hg (ppm) | 0.051 | 0.133 | 0.010 | 3.771 |
| Magnesium | Mg (wt%) | 1.071 | 0.361 | 0.358 | 2.826 |
| Manganese | Mn (ppm) | 949.252 | 175.935 | 412.462 | 2327.360 |
| Sodium | Na (wt%) | 2.158 | 0.296 | 0.919 | 3.363 |
| Phosphorus | P (wt%) | 0.079 | 0.026 | 0.009 | 0.213 |
| Lead | Pb (ppm) | 11.837 | 2.915 | 2.727 | 29.012 |
| Selenium | Se (ppm) | 0.174 | 0.182 | 0.100 | 1.815 |
| Titanium | Ti (wt%) | 0.749 | 0.223 | 0.311 | 1.882 |
| Zinc | Zn (ppm) | 97.213 | 17.248 | 50.550 | 211.994 |