| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.772 | 0.435 | 0.131 | 4.430 |
| Arsenic | As (ppm) | 1.855 | 0.813 | 0.802 | 6.817 |
| Calcium | Ca (wt%) | 0.019 | 0.004 | 0.010 | 0.038 |
| Copper | Cu (ppm) | 2.504 | 1.255 | 1.139 | 13.563 |
| Iron | Fe (wt%) | 0.392 | 0.196 | 0.120 | 1.968 |
| Mercury | Hg (ppm) | 0.014 | 0.007 | 0.010 | 0.058 |
| Magnesium | Mg (wt%) | 0.032 | 0.011 | 0.005 | 0.106 |
| Manganese | Mn (ppm) | 88.656 | 84.105 | 34.010 | 859.583 |
| Sodium | Na (wt%) | 0.025 | 0.011 | 0.003 | 0.061 |
| Phosphorus | P (wt%) | 0.007 | 0.002 | 0.003 | 0.015 |
| Lead | Pb (ppm) | 9.878 | 3.819 | 2.642 | 35.035 |
| Selenium | Se (ppm) | 0.150 | 0.084 | 0.100 | 0.777 |
| Titanium | Ti (wt%) | 0.277 | 0.054 | 0.175 | 0.519 |
| Zinc | Zn (ppm) | 9.721 | 3.800 | 4.017 | 31.186 |