| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.231 | 0.141 | 0.022 | 0.829 |
| Arsenic | As (ppm) | 1.410 | 0.314 | 0.875 | 2.806 |
| Calcium | Ca (wt%) | 0.020 | 0.017 | 0.003 | 0.078 |
| Copper | Cu (ppm) | 1.156 | 0.142 | 1.000 | 1.652 |
| Iron | Fe (wt%) | 0.067 | 0.041 | 0.010 | 0.192 |
| Mercury | Hg (ppm) | 0.011 | 0.001 | 0.010 | 0.014 |
| Magnesium | Mg (wt%) | 0.007 | 0.004 | 0.003 | 0.025 |
| Manganese | Mn (ppm) | 22.607 | 13.741 | 5.111 | 83.488 |
| Sodium | Na (wt%) | 0.012 | 0.012 | 0.003 | 0.075 |
| Phosphorus | P (wt%) | 0.011 | 0.007 | 0.003 | 0.034 |
| Lead | Pb (ppm) | 8.941 | 2.191 | 2.528 | 12.831 |
| Selenium | Se (ppm) | 0.109 | 0.013 | 0.100 | 0.194 |
| Titanium | Ti (wt%) | 0.296 | 0.049 | 0.152 | 0.416 |
| Zinc | Zn (ppm) | 2.712 | 1.563 | 1.008 | 12.426 |