| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.191 | 0.489 | 1.451 | 4.883 |
| Arsenic | As (ppm) | 3.360 | 0.948 | 2.061 | 8.995 |
| Calcium | Ca (wt%) | 11.954 | 4.491 | 4.394 | 25.742 |
| Copper | Cu (ppm) | 10.193 | 2.239 | 6.168 | 18.781 |
| Iron | Fe (wt%) | 0.961 | 0.236 | 0.626 | 2.106 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.032 |
| Magnesium | Mg (wt%) | 0.440 | 0.114 | 0.197 | 0.687 |
| Manganese | Mn (ppm) | 214.937 | 48.146 | 142.348 | 492.603 |
| Sodium | Na (wt%) | 0.083 | 0.013 | 0.054 | 0.155 |
| Phosphorus | P (wt%) | 0.023 | 0.005 | 0.015 | 0.035 |
| Lead | Pb (ppm) | 14.265 | 4.591 | 7.299 | 24.317 |
| Selenium | Se (ppm) | 0.210 | 0.101 | 0.100 | 0.649 |
| Titanium | Ti (wt%) | 0.124 | 0.021 | 0.088 | 0.229 |
| Zinc | Zn (ppm) | 20.809 | 5.226 | 12.036 | 55.061 |