| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.821 | 0.549 | 0.130 | 3.703 |
| Arsenic | As (ppm) | 1.974 | 0.935 | 0.778 | 6.577 |
| Calcium | Ca (wt%) | 0.020 | 0.013 | 0.008 | 0.099 |
| Copper | Cu (ppm) | 3.281 | 1.995 | 1.015 | 9.780 |
| Iron | Fe (wt%) | 0.484 | 0.282 | 0.103 | 1.592 |
| Mercury | Hg (ppm) | 0.021 | 0.016 | 0.010 | 0.096 |
| Magnesium | Mg (wt%) | 0.021 | 0.014 | 0.003 | 0.077 |
| Manganese | Mn (ppm) | 73.367 | 60.622 | 15.423 | 347.925 |
| Sodium | Na (wt%) | 0.007 | 0.007 | 0.003 | 0.080 |
| Phosphorus | P (wt%) | 0.007 | 0.003 | 0.003 | 0.023 |
| Lead | Pb (ppm) | 13.359 | 6.923 | 2.135 | 48.443 |
| Selenium | Se (ppm) | 0.234 | 0.156 | 0.101 | 0.876 |
| Titanium | Ti (wt%) | 0.310 | 0.091 | 0.035 | 0.603 |
| Zinc | Zn (ppm) | 8.526 | 4.754 | 2.384 | 24.478 |