| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.493 | 0.520 | 2.585 | 5.835 |
| Arsenic | As (ppm) | 4.202 | 0.640 | 2.015 | 5.641 |
| Calcium | Ca (wt%) | 1.267 | 0.479 | 0.254 | 3.079 |
| Copper | Cu (ppm) | 10.586 | 2.346 | 3.037 | 18.024 |
| Iron | Fe (wt%) | 1.809 | 0.255 | 0.955 | 2.583 |
| Mercury | Hg (ppm) | 0.011 | 0.002 | 0.010 | 0.022 |
| Magnesium | Mg (wt%) | 0.727 | 0.206 | 0.203 | 1.278 |
| Manganese | Mn (ppm) | 478.408 | 114.313 | 218.644 | 944.967 |
| Sodium | Na (wt%) | 0.708 | 0.087 | 0.403 | 0.868 |
| Phosphorus | P (wt%) | 0.034 | 0.005 | 0.020 | 0.049 |
| Lead | Pb (ppm) | 17.712 | 2.269 | 9.353 | 24.785 |
| Selenium | Se (ppm) | 0.308 | 0.383 | 0.100 | 2.927 |
| Titanium | Ti (wt%) | 0.288 | 0.024 | 0.220 | 0.417 |
| Zinc | Zn (ppm) | 37.757 | 7.862 | 15.137 | 79.057 |