| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.168 | 0.700 | 2.107 | 6.394 |
| Arsenic | As (ppm) | 8.854 | 4.231 | 3.603 | 31.135 |
| Calcium | Ca (wt%) | 8.367 | 3.254 | 1.194 | 18.900 |
| Copper | Cu (ppm) | 19.444 | 16.821 | 6.025 | 194.954 |
| Iron | Fe (wt%) | 1.681 | 0.441 | 0.850 | 4.986 |
| Mercury | Hg (ppm) | 0.023 | 0.013 | 0.010 | 0.114 |
| Magnesium | Mg (wt%) | 1.871 | 0.624 | 0.704 | 4.662 |
| Manganese | Mn (ppm) | 396.128 | 67.763 | 238.000 | 644.908 |
| Sodium | Na (wt%) | 1.072 | 0.550 | 0.331 | 4.809 |
| Phosphorus | P (wt%) | 0.073 | 0.017 | 0.045 | 0.181 |
| Lead | Pb (ppm) | 30.801 | 48.260 | 12.000 | 845.724 |
| Selenium | Se (ppm) | 0.221 | 0.122 | 0.100 | 1.030 |
| Titanium | Ti (wt%) | 0.201 | 0.047 | 0.095 | 0.572 |
| Zinc | Zn (ppm) | 54.055 | 22.493 | 28.279 | 244.129 |