| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.413 | 0.521 | 3.786 | 6.683 |
| Arsenic | As (ppm) | 4.869 | 0.845 | 2.734 | 9.523 |
| Calcium | Ca (wt%) | 1.983 | 0.812 | 0.928 | 6.769 |
| Copper | Cu (ppm) | 14.691 | 2.609 | 6.350 | 25.614 |
| Iron | Fe (wt%) | 2.194 | 0.220 | 1.660 | 2.848 |
| Mercury | Hg (ppm) | 0.021 | 0.006 | 0.010 | 0.059 |
| Magnesium | Mg (wt%) | 0.783 | 0.180 | 0.466 | 1.406 |
| Manganese | Mn (ppm) | 484.331 | 71.317 | 322.795 | 876.421 |
| Sodium | Na (wt%) | 0.983 | 0.196 | 0.525 | 2.667 |
| Phosphorus | P (wt%) | 0.082 | 0.011 | 0.052 | 0.135 |
| Lead | Pb (ppm) | 20.351 | 3.496 | 11.156 | 32.081 |
| Selenium | Se (ppm) | 0.190 | 0.063 | 0.100 | 0.571 |
| Titanium | Ti (wt%) | 0.300 | 0.045 | 0.222 | 0.526 |
| Zinc | Zn (ppm) | 71.732 | 11.614 | 51.220 | 122.500 |