| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.645 | 0.446 | 4.670 | 7.350 |
| Arsenic | As (ppm) | 10.471 | 3.901 | 4.985 | 29.900 |
| Calcium | Ca (wt%) | 0.285 | 0.069 | 0.147 | 0.620 |
| Copper | Cu (ppm) | 9.282 | 1.833 | 5.269 | 15.682 |
| Iron | Fe (wt%) | 3.369 | 0.474 | 2.408 | 5.681 |
| Mercury | Hg (ppm) | 0.048 | 0.020 | 0.017 | 0.135 |
| Magnesium | Mg (wt%) | 0.579 | 0.043 | 0.461 | 0.695 |
| Manganese | Mn (ppm) | 681.998 | 121.776 | 290.297 | 963.736 |
| Sodium | Na (wt%) | 0.622 | 0.030 | 0.512 | 0.663 |
| Phosphorus | P (wt%) | 0.059 | 0.005 | 0.046 | 0.073 |
| Lead | Pb (ppm) | 29.830 | 4.687 | 18.310 | 47.959 |
| Selenium | Se (ppm) | 0.188 | 0.049 | 0.105 | 0.309 |
| Titanium | Ti (wt%) | 0.257 | 0.016 | 0.195 | 0.299 |
| Zinc | Zn (ppm) | 82.734 | 7.915 | 60.242 | 104.950 |