| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.332 | 1.164 | 2.179 | 9.122 |
| Arsenic | As (ppm) | 19.753 | 22.812 | 3.145 | 244.516 |
| Calcium | Ca (wt%) | 1.793 | 0.788 | 0.335 | 6.837 |
| Copper | Cu (ppm) | 33.057 | 19.414 | 5.731 | 125.196 |
| Iron | Fe (wt%) | 2.894 | 0.978 | 1.246 | 8.469 |
| Mercury | Hg (ppm) | 0.068 | 0.085 | 0.012 | 1.036 |
| Magnesium | Mg (wt%) | 0.999 | 0.295 | 0.488 | 2.405 |
| Manganese | Mn (ppm) | 672.381 | 271.868 | 180.721 | 2592.790 |
| Sodium | Na (wt%) | 0.913 | 0.355 | 0.258 | 1.950 |
| Phosphorus | P (wt%) | 0.078 | 0.028 | 0.032 | 0.168 |
| Lead | Pb (ppm) | 26.355 | 17.651 | 6.475 | 187.393 |
| Selenium | Se (ppm) | 0.441 | 0.214 | 0.101 | 1.933 |
| Titanium | Ti (wt%) | 0.305 | 0.101 | 0.081 | 0.802 |
| Zinc | Zn (ppm) | 87.275 | 46.962 | 22.924 | 334.608 |