| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.644 | 0.432 | 4.264 | 6.466 |
| Arsenic | As (ppm) | 10.862 | 1.033 | 7.486 | 13.494 |
| Calcium | Ca (wt%) | 0.770 | 0.461 | 0.179 | 2.338 |
| Copper | Cu (ppm) | 15.226 | 2.111 | 11.133 | 21.072 |
| Iron | Fe (wt%) | 3.221 | 0.286 | 2.205 | 3.878 |
| Mercury | Hg (ppm) | 0.035 | 0.007 | 0.020 | 0.058 |
| Magnesium | Mg (wt%) | 0.535 | 0.101 | 0.362 | 0.864 |
| Manganese | Mn (ppm) | 1210.540 | 460.132 | 648.648 | 3239.000 |
| Sodium | Na (wt%) | 0.520 | 0.035 | 0.425 | 0.646 |
| Phosphorus | P (wt%) | 0.052 | 0.005 | 0.042 | 0.071 |
| Lead | Pb (ppm) | 24.844 | 3.002 | 18.554 | 32.863 |
| Selenium | Se (ppm) | 0.466 | 0.137 | 0.267 | 0.837 |
| Titanium | Ti (wt%) | 0.296 | 0.017 | 0.233 | 0.331 |
| Zinc | Zn (ppm) | 81.453 | 5.858 | 66.981 | 105.420 |