| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.245 | 0.781 | 1.287 | 6.035 |
| Arsenic | As (ppm) | 3.383 | 1.334 | 0.983 | 8.543 |
| Calcium | Ca (wt%) | 0.636 | 0.307 | 0.041 | 2.234 |
| Copper | Cu (ppm) | 7.847 | 1.833 | 1.992 | 21.937 |
| Iron | Fe (wt%) | 4.262 | 3.834 | 0.653 | 25.933 |
| Mercury | Hg (ppm) | 0.053 | 0.015 | 0.012 | 0.105 |
| Magnesium | Mg (wt%) | 0.176 | 0.089 | 0.044 | 0.872 |
| Manganese | Mn (ppm) | 1010.770 | 774.929 | 87.585 | 4703.170 |
| Sodium | Na (wt%) | 0.649 | 0.349 | 0.034 | 1.884 |
| Phosphorus | P (wt%) | 0.023 | 0.011 | 0.009 | 0.063 |
| Lead | Pb (ppm) | 17.512 | 2.864 | 10.510 | 24.966 |
| Selenium | Se (ppm) | 0.155 | 0.058 | 0.100 | 0.473 |
| Titanium | Ti (wt%) | 0.577 | 0.140 | 0.298 | 1.481 |
| Zinc | Zn (ppm) | 34.188 | 14.938 | 10.803 | 100.239 |