| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.612 | 0.571 | 2.450 | 4.770 |
| Arsenic | As (ppm) | 4.969 | 1.115 | 1.312 | 7.129 |
| Calcium | Ca (wt%) | 0.238 | 0.095 | 0.041 | 0.534 |
| Copper | Cu (ppm) | 9.427 | 2.435 | 3.285 | 14.979 |
| Iron | Fe (wt%) | 1.259 | 0.179 | 0.692 | 1.746 |
| Mercury | Hg (ppm) | 0.018 | 0.004 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.233 | 0.083 | 0.095 | 0.424 |
| Manganese | Mn (ppm) | 380.256 | 150.589 | 90.387 | 788.194 |
| Sodium | Na (wt%) | 0.625 | 0.225 | 0.134 | 0.938 |
| Phosphorus | P (wt%) | 0.025 | 0.009 | 0.011 | 0.043 |
| Lead | Pb (ppm) | 15.085 | 1.640 | 11.886 | 20.684 |
| Selenium | Se (ppm) | 0.626 | 0.867 | 0.104 | 7.796 |
| Titanium | Ti (wt%) | 0.272 | 0.044 | 0.111 | 0.391 |
| Zinc | Zn (ppm) | 34.633 | 9.528 | 19.058 | 70.379 |