| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.223 | 0.517 | 0.273 | 3.114 |
| Arsenic | As (ppm) | 3.143 | 1.166 | 0.811 | 8.132 |
| Calcium | Ca (wt%) | 0.027 | 0.011 | 0.010 | 0.054 |
| Copper | Cu (ppm) | 4.363 | 0.717 | 3.122 | 7.290 |
| Iron | Fe (wt%) | 1.334 | 0.457 | 0.440 | 3.190 |
| Mercury | Hg (ppm) | 0.017 | 0.008 | 0.010 | 0.048 |
| Magnesium | Mg (wt%) | 0.025 | 0.006 | 0.008 | 0.039 |
| Manganese | Mn (ppm) | 287.534 | 107.530 | 114.318 | 787.422 |
| Sodium | Na (wt%) | 0.007 | 0.002 | 0.003 | 0.011 |
| Phosphorus | P (wt%) | 0.024 | 0.013 | 0.005 | 0.080 |
| Lead | Pb (ppm) | 17.284 | 5.989 | 8.904 | 49.422 |
| Selenium | Se (ppm) | 0.261 | 0.072 | 0.106 | 0.475 |
| Titanium | Ti (wt%) | 0.431 | 0.081 | 0.203 | 0.668 |
| Zinc | Zn (ppm) | 24.995 | 10.162 | 14.032 | 80.697 |