| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.363 | 0.639 | 4.554 | 7.613 |
| Arsenic | As (ppm) | 4.941 | 2.611 | 1.886 | 27.367 |
| Calcium | Ca (wt%) | 1.609 | 0.695 | 0.589 | 6.196 |
| Copper | Cu (ppm) | 25.825 | 17.702 | 1.097 | 119.829 |
| Iron | Fe (wt%) | 3.386 | 0.992 | 2.018 | 8.155 |
| Mercury | Hg (ppm) | 0.024 | 0.011 | 0.010 | 0.101 |
| Magnesium | Mg (wt%) | 0.776 | 0.153 | 0.452 | 1.431 |
| Manganese | Mn (ppm) | 659.465 | 112.344 | 376.881 | 1069.280 |
| Sodium | Na (wt%) | 1.213 | 0.179 | 0.649 | 1.678 |
| Phosphorus | P (wt%) | 0.071 | 0.017 | 0.031 | 0.137 |
| Lead | Pb (ppm) | 33.308 | 17.089 | 15.009 | 132.441 |
| Selenium | Se (ppm) | 0.430 | 0.441 | 0.100 | 2.549 |
| Titanium | Ti (wt%) | 0.371 | 0.093 | 0.201 | 0.816 |
| Zinc | Zn (ppm) | 91.523 | 43.016 | 43.821 | 412.075 |