| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.255 | 0.978 | 0.359 | 5.233 |
| Arsenic | As (ppm) | 3.703 | 1.393 | 1.230 | 14.269 |
| Calcium | Ca (wt%) | 0.296 | 0.480 | 0.012 | 2.377 |
| Copper | Cu (ppm) | 6.946 | 1.927 | 1.811 | 14.047 |
| Iron | Fe (wt%) | 1.421 | 0.824 | 0.400 | 3.926 |
| Mercury | Hg (ppm) | 0.054 | 0.038 | 0.012 | 0.259 |
| Magnesium | Mg (wt%) | 0.087 | 0.069 | 0.008 | 0.366 |
| Manganese | Mn (ppm) | 361.446 | 344.926 | 63.796 | 2384.660 |
| Sodium | Na (wt%) | 0.184 | 0.281 | 0.007 | 1.096 |
| Phosphorus | P (wt%) | 0.041 | 0.014 | 0.006 | 0.136 |
| Lead | Pb (ppm) | 18.258 | 5.569 | 6.323 | 53.395 |
| Selenium | Se (ppm) | 0.277 | 0.093 | 0.102 | 0.732 |
| Titanium | Ti (wt%) | 0.584 | 0.086 | 0.373 | 1.253 |
| Zinc | Zn (ppm) | 22.728 | 8.351 | 7.557 | 52.947 |