| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.941 | 0.577 | 2.643 | 6.449 |
| Arsenic | As (ppm) | 5.814 | 1.606 | 2.232 | 14.179 |
| Calcium | Ca (wt%) | 2.116 | 1.008 | 0.509 | 7.866 |
| Copper | Cu (ppm) | 9.621 | 3.200 | 3.087 | 30.663 |
| Iron | Fe (wt%) | 2.037 | 0.409 | 0.727 | 3.673 |
| Mercury | Hg (ppm) | 0.019 | 0.009 | 0.010 | 0.068 |
| Magnesium | Mg (wt%) | 0.850 | 0.366 | 0.228 | 2.981 |
| Manganese | Mn (ppm) | 327.186 | 106.811 | 133.482 | 824.518 |
| Sodium | Na (wt%) | 0.846 | 0.283 | 0.248 | 2.964 |
| Phosphorus | P (wt%) | 0.060 | 0.013 | 0.021 | 0.132 |
| Lead | Pb (ppm) | 21.296 | 3.639 | 9.778 | 35.912 |
| Selenium | Se (ppm) | 0.470 | 0.308 | 0.101 | 2.797 |
| Titanium | Ti (wt%) | 0.237 | 0.054 | 0.107 | 0.550 |
| Zinc | Zn (ppm) | 54.182 | 12.086 | 20.488 | 118.959 |