| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.485 | 0.731 | 1.538 | 5.600 |
| Arsenic | As (ppm) | 5.512 | 0.940 | 3.078 | 9.555 |
| Calcium | Ca (wt%) | 0.198 | 0.089 | 0.040 | 0.477 |
| Copper | Cu (ppm) | 8.442 | 1.752 | 4.181 | 15.453 |
| Iron | Fe (wt%) | 1.405 | 0.329 | 0.681 | 2.693 |
| Mercury | Hg (ppm) | 0.035 | 0.013 | 0.010 | 0.069 |
| Magnesium | Mg (wt%) | 0.206 | 0.081 | 0.077 | 0.448 |
| Manganese | Mn (ppm) | 582.289 | 329.411 | 159.222 | 2456.330 |
| Sodium | Na (wt%) | 0.440 | 0.253 | 0.068 | 1.042 |
| Phosphorus | P (wt%) | 0.034 | 0.009 | 0.016 | 0.081 |
| Lead | Pb (ppm) | 17.853 | 4.192 | 7.069 | 35.242 |
| Selenium | Se (ppm) | 0.330 | 0.107 | 0.104 | 0.671 |
| Titanium | Ti (wt%) | 0.305 | 0.044 | 0.165 | 0.411 |
| Zinc | Zn (ppm) | 34.314 | 8.268 | 18.218 | 71.926 |