| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.806 | 0.845 | 1.497 | 6.135 |
| Arsenic | As (ppm) | 8.972 | 1.498 | 3.008 | 13.188 |
| Calcium | Ca (wt%) | 0.134 | 0.081 | 0.031 | 0.938 |
| Copper | Cu (ppm) | 16.342 | 3.299 | 4.924 | 26.601 |
| Iron | Fe (wt%) | 3.596 | 0.767 | 0.807 | 5.708 |
| Mercury | Hg (ppm) | 0.040 | 0.007 | 0.014 | 0.082 |
| Magnesium | Mg (wt%) | 0.266 | 0.087 | 0.082 | 0.650 |
| Manganese | Mn (ppm) | 2346.370 | 1189.900 | 603.713 | 6552.730 |
| Sodium | Na (wt%) | 0.143 | 0.061 | 0.039 | 0.431 |
| Phosphorus | P (wt%) | 0.041 | 0.010 | 0.012 | 0.064 |
| Lead | Pb (ppm) | 22.703 | 2.508 | 16.216 | 34.464 |
| Selenium | Se (ppm) | 0.644 | 0.162 | 0.192 | 0.999 |
| Titanium | Ti (wt%) | 0.285 | 0.032 | 0.095 | 0.321 |
| Zinc | Zn (ppm) | 120.165 | 31.596 | 34.188 | 225.185 |