| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 9.526 | 1.126 | 2.313 | 13.099 |
| Arsenic | As (ppm) | 4.718 | 3.245 | 0.940 | 28.235 |
| Calcium | Ca (wt%) | 2.881 | 1.036 | 0.302 | 6.291 |
| Copper | Cu (ppm) | 48.133 | 14.773 | 6.094 | 108.269 |
| Iron | Fe (wt%) | 6.131 | 1.505 | 1.423 | 13.848 |
| Mercury | Hg (ppm) | 0.022 | 0.009 | 0.010 | 0.082 |
| Magnesium | Mg (wt%) | 1.186 | 0.456 | 0.193 | 3.844 |
| Manganese | Mn (ppm) | 1228.820 | 329.755 | 245.109 | 3449.520 |
| Sodium | Na (wt%) | 1.835 | 0.500 | 0.359 | 3.045 |
| Phosphorus | P (wt%) | 0.085 | 0.025 | 0.007 | 0.214 |
| Lead | Pb (ppm) | 11.533 | 3.710 | 2.236 | 27.412 |
| Selenium | Se (ppm) | 0.106 | 0.018 | 0.100 | 0.291 |
| Titanium | Ti (wt%) | 0.756 | 0.162 | 0.169 | 1.350 |
| Zinc | Zn (ppm) | 92.035 | 15.688 | 36.017 | 173.465 |