| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.607 | 0.186 | 0.265 | 1.392 |
| Arsenic | As (ppm) | 1.791 | 0.333 | 0.989 | 3.146 |
| Calcium | Ca (wt%) | 0.029 | 0.009 | 0.020 | 0.080 |
| Copper | Cu (ppm) | 2.415 | 0.361 | 1.266 | 3.618 |
| Iron | Fe (wt%) | 0.481 | 0.127 | 0.218 | 0.937 |
| Mercury | Hg (ppm) | 0.010 | 0.001 | 0.010 | 0.016 |
| Magnesium | Mg (wt%) | 0.028 | 0.012 | 0.011 | 0.088 |
| Manganese | Mn (ppm) | 195.077 | 74.700 | 78.831 | 592.467 |
| Sodium | Na (wt%) | 0.028 | 0.013 | 0.003 | 0.071 |
| Phosphorus | P (wt%) | 0.007 | 0.002 | 0.003 | 0.015 |
| Lead | Pb (ppm) | 12.329 | 2.009 | 7.204 | 21.424 |
| Selenium | Se (ppm) | 0.115 | 0.018 | 0.100 | 0.218 |
| Titanium | Ti (wt%) | 0.354 | 0.053 | 0.235 | 0.471 |
| Zinc | Zn (ppm) | 14.232 | 2.688 | 7.779 | 22.914 |