| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.105 | 0.627 | 3.497 | 6.449 |
| Arsenic | As (ppm) | 6.692 | 0.895 | 4.868 | 9.751 |
| Calcium | Ca (wt%) | 4.065 | 1.530 | 0.949 | 8.322 |
| Copper | Cu (ppm) | 15.235 | 2.767 | 7.907 | 22.878 |
| Iron | Fe (wt%) | 2.188 | 0.363 | 1.313 | 2.923 |
| Mercury | Hg (ppm) | 0.011 | 0.002 | 0.010 | 0.025 |
| Magnesium | Mg (wt%) | 1.394 | 0.341 | 0.629 | 1.939 |
| Manganese | Mn (ppm) | 499.052 | 109.863 | 361.285 | 887.931 |
| Sodium | Na (wt%) | 0.763 | 0.194 | 0.458 | 1.406 |
| Phosphorus | P (wt%) | 0.046 | 0.008 | 0.032 | 0.090 |
| Lead | Pb (ppm) | 22.678 | 2.669 | 17.142 | 28.746 |
| Selenium | Se (ppm) | 0.617 | 0.370 | 0.156 | 2.075 |
| Titanium | Ti (wt%) | 0.278 | 0.032 | 0.208 | 0.344 |
| Zinc | Zn (ppm) | 44.429 | 7.349 | 27.686 | 63.690 |