| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.634 | 0.560 | 1.985 | 4.479 |
| Arsenic | As (ppm) | 6.006 | 0.962 | 4.493 | 8.958 |
| Calcium | Ca (wt%) | 0.626 | 0.396 | 0.320 | 1.839 |
| Copper | Cu (ppm) | 11.504 | 1.615 | 6.123 | 14.133 |
| Iron | Fe (wt%) | 1.535 | 0.217 | 0.689 | 1.847 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 0.363 | 0.045 | 0.286 | 0.493 |
| Manganese | Mn (ppm) | 243.723 | 42.034 | 86.846 | 316.473 |
| Sodium | Na (wt%) | 0.389 | 0.026 | 0.344 | 0.483 |
| Phosphorus | P (wt%) | 0.025 | 0.004 | 0.012 | 0.039 |
| Lead | Pb (ppm) | 14.575 | 1.438 | 12.050 | 18.836 |
| Selenium | Se (ppm) | 0.162 | 0.045 | 0.100 | 0.294 |
| Titanium | Ti (wt%) | 0.239 | 0.027 | 0.133 | 0.269 |
| Zinc | Zn (ppm) | 45.274 | 11.054 | 12.391 | 64.323 |