| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.993 | 0.770 | 0.856 | 4.739 |
| Arsenic | As (ppm) | 3.269 | 0.620 | 0.963 | 4.808 |
| Calcium | Ca (wt%) | 0.029 | 0.013 | 0.008 | 0.113 |
| Copper | Cu (ppm) | 5.212 | 1.157 | 2.433 | 8.380 |
| Iron | Fe (wt%) | 1.226 | 0.294 | 0.511 | 2.275 |
| Mercury | Hg (ppm) | 0.016 | 0.004 | 0.011 | 0.029 |
| Magnesium | Mg (wt%) | 0.025 | 0.007 | 0.012 | 0.048 |
| Manganese | Mn (ppm) | 157.566 | 40.650 | 59.618 | 378.050 |
| Sodium | Na (wt%) | 0.005 | 0.001 | 0.003 | 0.008 |
| Phosphorus | P (wt%) | 0.014 | 0.003 | 0.004 | 0.024 |
| Lead | Pb (ppm) | 15.163 | 4.340 | 5.579 | 30.799 |
| Selenium | Se (ppm) | 0.211 | 0.056 | 0.108 | 0.379 |
| Titanium | Ti (wt%) | 0.413 | 0.100 | 0.130 | 0.752 |
| Zinc | Zn (ppm) | 18.792 | 6.246 | 8.257 | 48.000 |