| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.251 | 1.061 | 2.052 | 7.941 |
| Arsenic | As (ppm) | 4.504 | 1.447 | 1.366 | 13.807 |
| Calcium | Ca (wt%) | 6.156 | 3.909 | 0.664 | 22.351 |
| Copper | Cu (ppm) | 11.111 | 3.389 | 1.845 | 22.387 |
| Iron | Fe (wt%) | 2.551 | 0.717 | 0.681 | 4.649 |
| Mercury | Hg (ppm) | 0.013 | 0.003 | 0.010 | 0.034 |
| Magnesium | Mg (wt%) | 0.805 | 0.234 | 0.114 | 1.514 |
| Manganese | Mn (ppm) | 646.321 | 162.079 | 163.710 | 1280.060 |
| Sodium | Na (wt%) | 1.363 | 0.617 | 0.188 | 2.556 |
| Phosphorus | P (wt%) | 0.064 | 0.021 | 0.015 | 0.161 |
| Lead | Pb (ppm) | 14.643 | 3.557 | 5.645 | 28.933 |
| Selenium | Se (ppm) | 0.285 | 0.177 | 0.100 | 1.086 |
| Titanium | Ti (wt%) | 0.395 | 0.108 | 0.077 | 0.744 |
| Zinc | Zn (ppm) | 52.632 | 15.488 | 16.286 | 92.714 |