| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.990 | 0.756 | 0.649 | 4.885 |
| Arsenic | As (ppm) | 2.785 | 0.698 | 1.014 | 6.089 |
| Calcium | Ca (wt%) | 0.203 | 0.135 | 0.033 | 0.897 |
| Copper | Cu (ppm) | 4.429 | 1.584 | 1.186 | 12.220 |
| Iron | Fe (wt%) | 0.952 | 0.264 | 0.323 | 1.662 |
| Mercury | Hg (ppm) | 0.043 | 0.022 | 0.010 | 0.134 |
| Magnesium | Mg (wt%) | 0.064 | 0.038 | 0.012 | 0.317 |
| Manganese | Mn (ppm) | 245.422 | 86.286 | 100.118 | 656.075 |
| Sodium | Na (wt%) | 0.150 | 0.077 | 0.040 | 0.576 |
| Phosphorus | P (wt%) | 0.019 | 0.012 | 0.005 | 0.115 |
| Lead | Pb (ppm) | 17.542 | 5.099 | 6.834 | 38.533 |
| Selenium | Se (ppm) | 0.358 | 0.124 | 0.102 | 0.912 |
| Titanium | Ti (wt%) | 0.635 | 0.083 | 0.368 | 0.901 |
| Zinc | Zn (ppm) | 18.699 | 8.245 | 4.291 | 70.657 |