| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.763 | 0.918 | 1.849 | 7.765 |
| Arsenic | As (ppm) | 7.237 | 3.909 | 1.517 | 29.268 |
| Calcium | Ca (wt%) | 1.185 | 0.822 | 0.081 | 5.992 |
| Copper | Cu (ppm) | 24.746 | 14.574 | 3.517 | 147.345 |
| Iron | Fe (wt%) | 2.208 | 0.363 | 0.740 | 3.654 |
| Mercury | Hg (ppm) | 0.058 | 0.021 | 0.011 | 0.177 |
| Magnesium | Mg (wt%) | 0.879 | 0.304 | 0.218 | 2.223 |
| Manganese | Mn (ppm) | 532.922 | 167.867 | 86.753 | 1751.100 |
| Sodium | Na (wt%) | 0.989 | 0.405 | 0.137 | 2.300 |
| Phosphorus | P (wt%) | 0.056 | 0.010 | 0.016 | 0.096 |
| Lead | Pb (ppm) | 21.923 | 5.511 | 6.789 | 40.746 |
| Selenium | Se (ppm) | 0.407 | 0.258 | 0.101 | 2.473 |
| Titanium | Ti (wt%) | 0.258 | 0.093 | 0.073 | 0.787 |
| Zinc | Zn (ppm) | 56.180 | 13.957 | 6.797 | 115.028 |