| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.078 | 0.379 | 0.422 | 2.182 |
| Arsenic | As (ppm) | 2.110 | 0.369 | 1.082 | 3.491 |
| Calcium | Ca (wt%) | 0.052 | 0.025 | 0.015 | 0.122 |
| Copper | Cu (ppm) | 3.602 | 1.237 | 1.022 | 10.472 |
| Iron | Fe (wt%) | 0.446 | 0.137 | 0.167 | 0.768 |
| Mercury | Hg (ppm) | 0.011 | 0.003 | 0.010 | 0.023 |
| Magnesium | Mg (wt%) | 0.044 | 0.019 | 0.016 | 0.087 |
| Manganese | Mn (ppm) | 103.651 | 41.635 | 27.550 | 191.351 |
| Sodium | Na (wt%) | 0.079 | 0.057 | 0.012 | 0.260 |
| Phosphorus | P (wt%) | 0.006 | 0.001 | 0.003 | 0.013 |
| Lead | Pb (ppm) | 10.505 | 2.775 | 6.054 | 17.471 |
| Selenium | Se (ppm) | 0.116 | 0.018 | 0.100 | 0.200 |
| Titanium | Ti (wt%) | 0.238 | 0.027 | 0.190 | 0.338 |
| Zinc | Zn (ppm) | 11.985 | 3.529 | 3.116 | 20.521 |