| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.772 | 0.898 | 0.391 | 6.767 |
| Arsenic | As (ppm) | 1.993 | 0.933 | 0.461 | 6.127 |
| Calcium | Ca (wt%) | 0.027 | 0.008 | 0.011 | 0.064 |
| Copper | Cu (ppm) | 3.111 | 1.438 | 1.204 | 10.950 |
| Iron | Fe (wt%) | 0.765 | 0.285 | 0.227 | 2.357 |
| Mercury | Hg (ppm) | 0.025 | 0.007 | 0.011 | 0.043 |
| Magnesium | Mg (wt%) | 0.030 | 0.013 | 0.009 | 0.102 |
| Manganese | Mn (ppm) | 132.865 | 27.037 | 52.872 | 228.763 |
| Sodium | Na (wt%) | 0.020 | 0.007 | 0.004 | 0.045 |
| Phosphorus | P (wt%) | 0.019 | 0.007 | 0.007 | 0.053 |
| Lead | Pb (ppm) | 19.421 | 4.479 | 8.567 | 43.499 |
| Selenium | Se (ppm) | 0.211 | 0.081 | 0.110 | 0.644 |
| Titanium | Ti (wt%) | 0.396 | 0.061 | 0.242 | 0.619 |
| Zinc | Zn (ppm) | 13.295 | 5.149 | 3.269 | 38.820 |