| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.029 | 0.564 | 3.000 | 6.235 |
| Arsenic | As (ppm) | 3.622 | 1.871 | 1.123 | 9.368 |
| Calcium | Ca (wt%) | 1.902 | 0.742 | 0.698 | 4.481 |
| Copper | Cu (ppm) | 6.439 | 3.322 | 1.038 | 17.621 |
| Iron | Fe (wt%) | 2.678 | 0.569 | 1.588 | 4.021 |
| Mercury | Hg (ppm) | 0.016 | 0.004 | 0.010 | 0.026 |
| Magnesium | Mg (wt%) | 0.847 | 0.211 | 0.403 | 1.317 |
| Manganese | Mn (ppm) | 660.300 | 97.919 | 441.448 | 906.233 |
| Sodium | Na (wt%) | 0.908 | 0.119 | 0.636 | 1.154 |
| Phosphorus | P (wt%) | 0.044 | 0.007 | 0.030 | 0.060 |
| Lead | Pb (ppm) | 17.729 | 3.577 | 13.015 | 31.703 |
| Selenium | Se (ppm) | 0.150 | 0.057 | 0.100 | 0.395 |
| Titanium | Ti (wt%) | 0.477 | 0.106 | 0.233 | 0.864 |
| Zinc | Zn (ppm) | 53.606 | 10.461 | 34.395 | 88.283 |