| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.752 | 0.586 | 3.625 | 5.799 |
| Arsenic | As (ppm) | 9.151 | 1.886 | 5.279 | 12.281 |
| Calcium | Ca (wt%) | 0.457 | 0.252 | 0.157 | 1.364 |
| Copper | Cu (ppm) | 58.808 | 109.917 | 14.180 | 760.164 |
| Iron | Fe (wt%) | 2.883 | 0.374 | 2.347 | 4.406 |
| Mercury | Hg (ppm) | 0.157 | 0.074 | 0.056 | 0.377 |
| Magnesium | Mg (wt%) | 0.554 | 0.081 | 0.423 | 0.783 |
| Manganese | Mn (ppm) | 1249.770 | 384.275 | 586.251 | 2611.090 |
| Sodium | Na (wt%) | 0.530 | 0.185 | 0.227 | 0.976 |
| Phosphorus | P (wt%) | 0.049 | 0.003 | 0.042 | 0.055 |
| Lead | Pb (ppm) | 55.584 | 47.400 | 20.034 | 357.097 |
| Selenium | Se (ppm) | 0.526 | 0.396 | 0.217 | 2.995 |
| Titanium | Ti (wt%) | 0.309 | 0.073 | 0.224 | 0.594 |
| Zinc | Zn (ppm) | 151.357 | 118.095 | 77.435 | 898.912 |