| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.402 | 0.679 | 5.214 | 7.723 |
| Arsenic | As (ppm) | 4.519 | 0.766 | 3.237 | 7.029 |
| Calcium | Ca (wt%) | 2.459 | 0.752 | 1.386 | 4.807 |
| Copper | Cu (ppm) | 16.958 | 3.888 | 4.320 | 25.813 |
| Iron | Fe (wt%) | 2.699 | 0.467 | 1.478 | 3.637 |
| Mercury | Hg (ppm) | 0.026 | 0.017 | 0.010 | 0.149 |
| Magnesium | Mg (wt%) | 0.906 | 0.357 | 0.335 | 1.881 |
| Manganese | Mn (ppm) | 531.264 | 56.486 | 427.641 | 718.881 |
| Sodium | Na (wt%) | 1.531 | 0.320 | 1.096 | 2.592 |
| Phosphorus | P (wt%) | 0.081 | 0.012 | 0.049 | 0.107 |
| Lead | Pb (ppm) | 23.869 | 6.098 | 10.242 | 56.689 |
| Selenium | Se (ppm) | 0.113 | 0.020 | 0.100 | 0.219 |
| Titanium | Ti (wt%) | 0.414 | 0.073 | 0.244 | 0.600 |
| Zinc | Zn (ppm) | 67.820 | 8.933 | 46.454 | 85.453 |