| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.917 | 0.437 | 1.774 | 4.054 |
| Arsenic | As (ppm) | 5.912 | 1.890 | 2.504 | 10.838 |
| Calcium | Ca (wt%) | 0.175 | 0.093 | 0.077 | 0.481 |
| Copper | Cu (ppm) | 5.144 | 1.327 | 2.357 | 9.609 |
| Iron | Fe (wt%) | 1.951 | 0.332 | 1.108 | 2.867 |
| Mercury | Hg (ppm) | 0.025 | 0.009 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.172 | 0.038 | 0.095 | 0.253 |
| Manganese | Mn (ppm) | 736.078 | 216.049 | 250.946 | 1632.210 |
| Sodium | Na (wt%) | 0.197 | 0.072 | 0.084 | 0.439 |
| Phosphorus | P (wt%) | 0.029 | 0.002 | 0.022 | 0.036 |
| Lead | Pb (ppm) | 20.103 | 3.249 | 14.241 | 28.161 |
| Selenium | Se (ppm) | 0.295 | 0.055 | 0.115 | 0.484 |
| Titanium | Ti (wt%) | 0.200 | 0.017 | 0.153 | 0.275 |
| Zinc | Zn (ppm) | 44.345 | 8.685 | 24.927 | 64.003 |