| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.439 | 0.415 | 3.953 | 6.235 |
| Arsenic | As (ppm) | 1.473 | 0.495 | 0.434 | 3.669 |
| Calcium | Ca (wt%) | 1.955 | 0.494 | 0.958 | 3.907 |
| Copper | Cu (ppm) | 11.904 | 2.298 | 5.295 | 18.368 |
| Iron | Fe (wt%) | 3.285 | 0.623 | 1.629 | 5.309 |
| Mercury | Hg (ppm) | 0.061 | 0.011 | 0.030 | 0.099 |
| Magnesium | Mg (wt%) | 0.770 | 0.269 | 0.253 | 2.012 |
| Manganese | Mn (ppm) | 1106.740 | 157.223 | 785.345 | 1670.050 |
| Sodium | Na (wt%) | 1.585 | 0.224 | 0.854 | 2.027 |
| Phosphorus | P (wt%) | 0.078 | 0.019 | 0.033 | 0.182 |
| Lead | Pb (ppm) | 45.462 | 23.268 | 19.144 | 170.195 |
| Selenium | Se (ppm) | 0.202 | 0.059 | 0.101 | 0.450 |
| Titanium | Ti (wt%) | 0.700 | 0.115 | 0.389 | 1.403 |
| Zinc | Zn (ppm) | 53.599 | 7.730 | 29.105 | 71.409 |