| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.978 | 0.522 | 1.660 | 3.888 |
| Arsenic | As (ppm) | 3.797 | 1.007 | 2.218 | 8.982 |
| Calcium | Ca (wt%) | 0.271 | 0.116 | 0.123 | 0.667 |
| Copper | Cu (ppm) | 5.908 | 1.048 | 3.034 | 8.310 |
| Iron | Fe (wt%) | 1.550 | 0.323 | 0.951 | 2.280 |
| Mercury | Hg (ppm) | 0.017 | 0.007 | 0.010 | 0.034 |
| Magnesium | Mg (wt%) | 0.174 | 0.051 | 0.089 | 0.372 |
| Manganese | Mn (ppm) | 534.195 | 120.589 | 323.850 | 975.993 |
| Sodium | Na (wt%) | 0.419 | 0.100 | 0.227 | 0.704 |
| Phosphorus | P (wt%) | 0.026 | 0.009 | 0.010 | 0.060 |
| Lead | Pb (ppm) | 18.317 | 2.505 | 12.123 | 22.996 |
| Selenium | Se (ppm) | 0.265 | 0.078 | 0.104 | 0.490 |
| Titanium | Ti (wt%) | 0.240 | 0.028 | 0.180 | 0.329 |
| Zinc | Zn (ppm) | 32.832 | 9.724 | 15.338 | 56.817 |