| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.219 | 1.249 | 1.467 | 6.702 |
| Arsenic | As (ppm) | 4.461 | 1.114 | 2.305 | 8.778 |
| Calcium | Ca (wt%) | 1.840 | 0.975 | 0.156 | 6.134 |
| Copper | Cu (ppm) | 10.437 | 3.569 | 1.110 | 25.122 |
| Iron | Fe (wt%) | 1.567 | 0.447 | 0.488 | 2.554 |
| Mercury | Hg (ppm) | 0.018 | 0.015 | 0.010 | 0.186 |
| Magnesium | Mg (wt%) | 0.584 | 0.228 | 0.093 | 1.208 |
| Manganese | Mn (ppm) | 313.684 | 106.579 | 58.959 | 564.052 |
| Sodium | Na (wt%) | 0.533 | 0.230 | 0.195 | 1.162 |
| Phosphorus | P (wt%) | 0.039 | 0.015 | 0.006 | 0.081 |
| Lead | Pb (ppm) | 13.503 | 5.731 | 2.118 | 34.715 |
| Selenium | Se (ppm) | 0.190 | 0.080 | 0.100 | 0.597 |
| Titanium | Ti (wt%) | 0.269 | 0.069 | 0.119 | 0.457 |
| Zinc | Zn (ppm) | 44.480 | 13.040 | 6.999 | 67.861 |