| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.845 | 0.281 | 0.491 | 1.648 |
| Arsenic | As (ppm) | 1.969 | 0.391 | 1.001 | 2.958 |
| Calcium | Ca (wt%) | 0.030 | 0.012 | 0.015 | 0.056 |
| Copper | Cu (ppm) | 4.753 | 2.090 | 1.051 | 19.281 |
| Iron | Fe (wt%) | 0.413 | 0.081 | 0.226 | 0.607 |
| Mercury | Hg (ppm) | 0.026 | 0.020 | 0.010 | 0.136 |
| Magnesium | Mg (wt%) | 0.034 | 0.011 | 0.020 | 0.064 |
| Manganese | Mn (ppm) | 98.071 | 31.037 | 46.523 | 197.195 |
| Sodium | Na (wt%) | 0.055 | 0.027 | 0.010 | 0.144 |
| Phosphorus | P (wt%) | 0.007 | 0.002 | 0.005 | 0.011 |
| Lead | Pb (ppm) | 8.222 | 1.099 | 4.381 | 11.980 |
| Selenium | Se (ppm) | 0.131 | 0.033 | 0.100 | 0.227 |
| Titanium | Ti (wt%) | 0.316 | 0.046 | 0.221 | 0.433 |
| Zinc | Zn (ppm) | 13.093 | 3.616 | 8.366 | 32.402 |