| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.653 | 0.501 | 3.486 | 6.403 |
| Arsenic | As (ppm) | 5.103 | 1.325 | 3.304 | 10.830 |
| Calcium | Ca (wt%) | 2.553 | 0.858 | 0.913 | 5.067 |
| Copper | Cu (ppm) | 12.693 | 1.281 | 8.654 | 16.853 |
| Iron | Fe (wt%) | 1.999 | 0.250 | 1.386 | 2.876 |
| Mercury | Hg (ppm) | 0.016 | 0.007 | 0.010 | 0.061 |
| Magnesium | Mg (wt%) | 0.555 | 0.100 | 0.378 | 1.038 |
| Manganese | Mn (ppm) | 340.763 | 41.475 | 215.393 | 512.902 |
| Sodium | Na (wt%) | 0.559 | 0.055 | 0.410 | 0.729 |
| Phosphorus | P (wt%) | 0.042 | 0.008 | 0.023 | 0.065 |
| Lead | Pb (ppm) | 21.332 | 3.154 | 16.278 | 39.454 |
| Selenium | Se (ppm) | 0.267 | 0.140 | 0.100 | 0.872 |
| Titanium | Ti (wt%) | 0.239 | 0.021 | 0.192 | 0.305 |
| Zinc | Zn (ppm) | 49.875 | 8.845 | 28.473 | 75.222 |