| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.988 | 1.019 | 1.014 | 7.088 |
| Arsenic | As (ppm) | 8.874 | 2.893 | 2.856 | 27.075 |
| Calcium | Ca (wt%) | 0.485 | 0.816 | 0.048 | 8.956 |
| Copper | Cu (ppm) | 11.699 | 4.897 | 4.093 | 42.430 |
| Iron | Fe (wt%) | 1.941 | 0.571 | 0.694 | 5.751 |
| Mercury | Hg (ppm) | 0.028 | 0.010 | 0.010 | 0.068 |
| Magnesium | Mg (wt%) | 0.303 | 0.349 | 0.075 | 5.013 |
| Manganese | Mn (ppm) | 380.557 | 160.672 | 120.735 | 1656.190 |
| Sodium | Na (wt%) | 0.079 | 0.037 | 0.020 | 0.287 |
| Phosphorus | P (wt%) | 0.022 | 0.007 | 0.007 | 0.060 |
| Lead | Pb (ppm) | 47.727 | 84.367 | 7.249 | 1161.840 |
| Selenium | Se (ppm) | 0.350 | 0.122 | 0.109 | 0.774 |
| Titanium | Ti (wt%) | 0.261 | 0.048 | 0.143 | 0.410 |
| Zinc | Zn (ppm) | 66.028 | 73.857 | 16.922 | 1018.050 |