| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.167 | 0.359 | 0.466 | 2.625 |
| Arsenic | As (ppm) | 3.248 | 1.026 | 1.351 | 7.467 |
| Calcium | Ca (wt%) | 0.063 | 0.089 | 0.012 | 0.546 |
| Copper | Cu (ppm) | 2.992 | 0.861 | 1.099 | 6.859 |
| Iron | Fe (wt%) | 1.019 | 0.171 | 0.367 | 1.575 |
| Mercury | Hg (ppm) | 0.133 | 0.318 | 0.010 | 1.735 |
| Magnesium | Mg (wt%) | 0.041 | 0.021 | 0.011 | 0.138 |
| Manganese | Mn (ppm) | 198.506 | 74.101 | 62.621 | 540.356 |
| Sodium | Na (wt%) | 0.042 | 0.054 | 0.004 | 0.325 |
| Phosphorus | P (wt%) | 0.024 | 0.015 | 0.003 | 0.127 |
| Lead | Pb (ppm) | 21.483 | 5.081 | 9.334 | 41.461 |
| Selenium | Se (ppm) | 0.163 | 0.045 | 0.102 | 0.315 |
| Titanium | Ti (wt%) | 0.617 | 0.173 | 0.286 | 1.728 |
| Zinc | Zn (ppm) | 10.607 | 2.046 | 2.296 | 17.726 |