| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.153 | 0.445 | 0.270 | 2.807 |
| Arsenic | As (ppm) | 2.457 | 1.160 | 0.306 | 7.212 |
| Calcium | Ca (wt%) | 0.053 | 0.046 | 0.014 | 0.434 |
| Copper | Cu (ppm) | 4.269 | 1.086 | 1.205 | 7.555 |
| Iron | Fe (wt%) | 0.519 | 0.157 | 0.147 | 1.190 |
| Mercury | Hg (ppm) | 0.014 | 0.004 | 0.010 | 0.033 |
| Magnesium | Mg (wt%) | 0.048 | 0.026 | 0.012 | 0.235 |
| Manganese | Mn (ppm) | 98.564 | 24.336 | 47.806 | 222.817 |
| Sodium | Na (wt%) | 0.073 | 0.054 | 0.011 | 0.290 |
| Phosphorus | P (wt%) | 0.006 | 0.002 | 0.003 | 0.019 |
| Lead | Pb (ppm) | 13.452 | 10.584 | 5.306 | 133.166 |
| Selenium | Se (ppm) | 0.160 | 0.042 | 0.100 | 0.393 |
| Titanium | Ti (wt%) | 0.234 | 0.041 | 0.116 | 0.329 |
| Zinc | Zn (ppm) | 13.675 | 6.299 | 4.533 | 53.994 |