| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.667 | 0.756 | 1.467 | 5.801 |
| Arsenic | As (ppm) | 5.825 | 1.062 | 2.529 | 9.110 |
| Calcium | Ca (wt%) | 0.553 | 0.281 | 0.195 | 1.620 |
| Copper | Cu (ppm) | 10.194 | 2.765 | 5.130 | 18.532 |
| Iron | Fe (wt%) | 1.727 | 0.324 | 1.023 | 2.935 |
| Mercury | Hg (ppm) | 0.013 | 0.003 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.405 | 0.125 | 0.157 | 0.973 |
| Manganese | Mn (ppm) | 437.890 | 135.290 | 272.688 | 853.006 |
| Sodium | Na (wt%) | 0.497 | 0.128 | 0.162 | 0.716 |
| Phosphorus | P (wt%) | 0.026 | 0.006 | 0.011 | 0.037 |
| Lead | Pb (ppm) | 18.525 | 5.542 | 5.767 | 35.752 |
| Selenium | Se (ppm) | 0.178 | 0.068 | 0.101 | 0.506 |
| Titanium | Ti (wt%) | 0.277 | 0.047 | 0.179 | 0.438 |
| Zinc | Zn (ppm) | 33.194 | 7.141 | 15.333 | 51.770 |