| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.179 | 0.547 | 1.967 | 4.708 |
| Arsenic | As (ppm) | 1.202 | 0.509 | 0.437 | 2.806 |
| Calcium | Ca (wt%) | 0.665 | 0.491 | 0.058 | 2.251 |
| Copper | Cu (ppm) | 8.981 | 2.483 | 2.932 | 17.062 |
| Iron | Fe (wt%) | 4.250 | 1.459 | 1.780 | 11.382 |
| Mercury | Hg (ppm) | 0.034 | 0.011 | 0.011 | 0.072 |
| Magnesium | Mg (wt%) | 0.349 | 0.145 | 0.095 | 0.792 |
| Manganese | Mn (ppm) | 680.767 | 258.571 | 238.308 | 1625.030 |
| Sodium | Na (wt%) | 0.282 | 0.152 | 0.076 | 0.766 |
| Phosphorus | P (wt%) | 0.020 | 0.013 | 0.003 | 0.064 |
| Lead | Pb (ppm) | 24.257 | 9.352 | 13.178 | 68.647 |
| Selenium | Se (ppm) | 0.124 | 0.031 | 0.100 | 0.279 |
| Titanium | Ti (wt%) | 0.860 | 0.218 | 0.503 | 1.504 |
| Zinc | Zn (ppm) | 57.200 | 26.919 | 28.373 | 183.013 |