| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.206 | 0.830 | 1.111 | 6.303 |
| Arsenic | As (ppm) | 7.105 | 2.249 | 1.261 | 13.195 |
| Calcium | Ca (wt%) | 0.401 | 0.121 | 0.093 | 0.660 |
| Copper | Cu (ppm) | 9.135 | 2.649 | 3.589 | 20.220 |
| Iron | Fe (wt%) | 1.746 | 0.461 | 0.525 | 2.925 |
| Mercury | Hg (ppm) | 0.029 | 0.012 | 0.010 | 0.060 |
| Magnesium | Mg (wt%) | 0.261 | 0.099 | 0.068 | 0.518 |
| Manganese | Mn (ppm) | 1083.610 | 417.961 | 115.512 | 3145.910 |
| Sodium | Na (wt%) | 0.272 | 0.218 | 0.068 | 0.860 |
| Phosphorus | P (wt%) | 0.025 | 0.010 | 0.011 | 0.064 |
| Lead | Pb (ppm) | 19.603 | 4.658 | 6.995 | 36.291 |
| Selenium | Se (ppm) | 0.274 | 0.087 | 0.102 | 0.553 |
| Titanium | Ti (wt%) | 0.216 | 0.043 | 0.111 | 0.372 |
| Zinc | Zn (ppm) | 42.388 | 17.533 | 14.623 | 126.376 |