| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.193 | 0.496 | 2.548 | 5.507 |
| Arsenic | As (ppm) | 4.403 | 0.952 | 2.511 | 8.856 |
| Calcium | Ca (wt%) | 3.142 | 1.063 | 0.541 | 7.132 |
| Copper | Cu (ppm) | 11.422 | 2.653 | 1.302 | 19.113 |
| Iron | Fe (wt%) | 1.833 | 0.268 | 1.181 | 2.507 |
| Mercury | Hg (ppm) | 0.020 | 0.009 | 0.010 | 0.059 |
| Magnesium | Mg (wt%) | 0.665 | 0.194 | 0.137 | 1.378 |
| Manganese | Mn (ppm) | 412.832 | 101.788 | 169.648 | 896.034 |
| Sodium | Na (wt%) | 0.743 | 0.212 | 0.452 | 1.482 |
| Phosphorus | P (wt%) | 0.036 | 0.009 | 0.011 | 0.080 |
| Lead | Pb (ppm) | 19.019 | 2.374 | 10.711 | 25.956 |
| Selenium | Se (ppm) | 0.366 | 0.531 | 0.100 | 6.306 |
| Titanium | Ti (wt%) | 0.217 | 0.023 | 0.139 | 0.285 |
| Zinc | Zn (ppm) | 38.970 | 8.640 | 22.627 | 75.918 |