| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.739 | 0.385 | 3.970 | 5.927 |
| Arsenic | As (ppm) | 7.453 | 1.500 | 2.709 | 11.692 |
| Calcium | Ca (wt%) | 1.807 | 0.318 | 0.793 | 2.666 |
| Copper | Cu (ppm) | 20.066 | 4.807 | 8.146 | 38.084 |
| Iron | Fe (wt%) | 3.388 | 0.441 | 2.512 | 4.623 |
| Mercury | Hg (ppm) | 0.022 | 0.006 | 0.010 | 0.039 |
| Magnesium | Mg (wt%) | 0.929 | 0.086 | 0.624 | 1.119 |
| Manganese | Mn (ppm) | 768.991 | 77.082 | 613.483 | 965.556 |
| Sodium | Na (wt%) | 0.820 | 0.059 | 0.664 | 1.035 |
| Phosphorus | P (wt%) | 0.060 | 0.005 | 0.044 | 0.071 |
| Lead | Pb (ppm) | 17.803 | 1.966 | 14.087 | 25.564 |
| Selenium | Se (ppm) | 0.275 | 0.070 | 0.107 | 0.487 |
| Titanium | Ti (wt%) | 0.538 | 0.095 | 0.393 | 0.868 |
| Zinc | Zn (ppm) | 94.443 | 16.106 | 51.327 | 134.286 |