| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.020 | 0.359 | 0.225 | 3.225 |
| Arsenic | As (ppm) | 2.051 | 0.497 | 0.740 | 4.672 |
| Calcium | Ca (wt%) | 0.040 | 0.013 | 0.012 | 0.087 |
| Copper | Cu (ppm) | 4.916 | 3.424 | 1.234 | 29.300 |
| Iron | Fe (wt%) | 0.724 | 0.178 | 0.219 | 1.352 |
| Mercury | Hg (ppm) | 0.014 | 0.004 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.048 | 0.016 | 0.014 | 0.163 |
| Manganese | Mn (ppm) | 311.773 | 95.226 | 99.671 | 773.067 |
| Sodium | Na (wt%) | 0.081 | 0.030 | 0.015 | 0.245 |
| Phosphorus | P (wt%) | 0.013 | 0.005 | 0.003 | 0.044 |
| Lead | Pb (ppm) | 13.528 | 2.779 | 3.343 | 21.921 |
| Selenium | Se (ppm) | 0.153 | 0.061 | 0.100 | 0.661 |
| Titanium | Ti (wt%) | 0.329 | 0.073 | 0.098 | 0.583 |
| Zinc | Zn (ppm) | 16.492 | 4.815 | 6.282 | 39.774 |