| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.492 | 0.724 | 0.819 | 6.069 |
| Arsenic | As (ppm) | 3.579 | 1.053 | 1.058 | 9.377 |
| Calcium | Ca (wt%) | 0.056 | 0.025 | 0.016 | 0.140 |
| Copper | Cu (ppm) | 5.726 | 1.958 | 1.387 | 14.741 |
| Iron | Fe (wt%) | 1.234 | 0.350 | 0.423 | 3.172 |
| Mercury | Hg (ppm) | 0.027 | 0.012 | 0.010 | 0.074 |
| Magnesium | Mg (wt%) | 0.049 | 0.018 | 0.013 | 0.112 |
| Manganese | Mn (ppm) | 147.941 | 56.901 | 55.163 | 320.314 |
| Sodium | Na (wt%) | 0.011 | 0.003 | 0.003 | 0.021 |
| Phosphorus | P (wt%) | 0.031 | 0.013 | 0.010 | 0.082 |
| Lead | Pb (ppm) | 20.192 | 3.912 | 9.758 | 37.699 |
| Selenium | Se (ppm) | 0.339 | 0.110 | 0.121 | 0.919 |
| Titanium | Ti (wt%) | 0.367 | 0.039 | 0.215 | 0.511 |
| Zinc | Zn (ppm) | 19.582 | 6.239 | 7.910 | 42.783 |