| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.910 | 0.897 | 0.446 | 4.793 |
| Arsenic | As (ppm) | 4.568 | 2.466 | 1.239 | 13.400 |
| Calcium | Ca (wt%) | 0.369 | 0.285 | 0.041 | 1.288 |
| Copper | Cu (ppm) | 5.616 | 2.440 | 1.638 | 12.239 |
| Iron | Fe (wt%) | 0.989 | 0.379 | 0.329 | 2.077 |
| Mercury | Hg (ppm) | 0.014 | 0.005 | 0.010 | 0.035 |
| Magnesium | Mg (wt%) | 0.193 | 0.143 | 0.024 | 0.642 |
| Manganese | Mn (ppm) | 508.060 | 306.896 | 114.275 | 1686.320 |
| Sodium | Na (wt%) | 0.328 | 0.196 | 0.043 | 0.782 |
| Phosphorus | P (wt%) | 0.025 | 0.013 | 0.007 | 0.067 |
| Lead | Pb (ppm) | 13.778 | 2.636 | 7.084 | 23.416 |
| Selenium | Se (ppm) | 0.149 | 0.046 | 0.101 | 0.376 |
| Titanium | Ti (wt%) | 0.310 | 0.069 | 0.150 | 0.672 |
| Zinc | Zn (ppm) | 22.291 | 10.180 | 6.498 | 60.336 |