| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.747 | 0.529 | 6.515 | 9.335 |
| Arsenic | As (ppm) | 6.805 | 1.959 | 2.214 | 12.386 |
| Calcium | Ca (wt%) | 1.111 | 0.677 | 0.242 | 3.578 |
| Copper | Cu (ppm) | 35.548 | 17.419 | 11.689 | 111.588 |
| Iron | Fe (wt%) | 3.917 | 0.825 | 2.643 | 7.258 |
| Mercury | Hg (ppm) | 0.048 | 0.012 | 0.030 | 0.114 |
| Magnesium | Mg (wt%) | 1.219 | 0.369 | 0.748 | 2.519 |
| Manganese | Mn (ppm) | 656.407 | 257.536 | 310.810 | 1453.460 |
| Sodium | Na (wt%) | 2.014 | 0.213 | 1.281 | 2.638 |
| Phosphorus | P (wt%) | 0.079 | 0.018 | 0.047 | 0.144 |
| Lead | Pb (ppm) | 6.422 | 2.292 | 2.005 | 11.882 |
| Selenium | Se (ppm) | 0.247 | 0.108 | 0.100 | 0.947 |
| Titanium | Ti (wt%) | 0.498 | 0.145 | 0.292 | 1.206 |
| Zinc | Zn (ppm) | 77.941 | 12.014 | 60.279 | 120.764 |