| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.832 | 0.408 | 3.888 | 12.217 |
| Arsenic | As (ppm) | 7.566 | 3.681 | 1.802 | 31.524 |
| Calcium | Ca (wt%) | 2.578 | 0.499 | 1.068 | 6.993 |
| Copper | Cu (ppm) | 34.495 | 9.623 | 13.975 | 120.484 |
| Iron | Fe (wt%) | 4.041 | 0.756 | 2.117 | 8.031 |
| Mercury | Hg (ppm) | 0.027 | 0.116 | 0.010 | 4.032 |
| Magnesium | Mg (wt%) | 0.963 | 0.356 | 0.376 | 10.824 |
| Manganese | Mn (ppm) | 880.912 | 166.069 | 430.509 | 3399.370 |
| Sodium | Na (wt%) | 1.909 | 0.237 | 0.701 | 3.570 |
| Phosphorus | P (wt%) | 0.079 | 0.017 | 0.035 | 0.195 |
| Lead | Pb (ppm) | 14.150 | 4.724 | 2.317 | 134.840 |
| Selenium | Se (ppm) | 0.153 | 0.108 | 0.100 | 1.353 |
| Titanium | Ti (wt%) | 0.668 | 0.144 | 0.268 | 1.636 |
| Zinc | Zn (ppm) | 89.620 | 25.762 | 46.755 | 575.079 |