| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.612 | 0.652 | 1.633 | 5.406 |
| Arsenic | As (ppm) | 3.294 | 0.941 | 1.511 | 6.943 |
| Calcium | Ca (wt%) | 4.936 | 2.963 | 0.338 | 17.374 |
| Copper | Cu (ppm) | 9.487 | 2.576 | 1.929 | 19.965 |
| Iron | Fe (wt%) | 1.767 | 1.025 | 0.889 | 12.556 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.912 | 0.422 | 0.173 | 3.143 |
| Manganese | Mn (ppm) | 288.049 | 119.584 | 103.787 | 1297.970 |
| Sodium | Na (wt%) | 0.560 | 0.118 | 0.267 | 1.325 |
| Phosphorus | P (wt%) | 0.035 | 0.012 | 0.012 | 0.084 |
| Lead | Pb (ppm) | 17.850 | 3.165 | 8.030 | 31.470 |
| Selenium | Se (ppm) | 0.156 | 0.066 | 0.100 | 0.594 |
| Titanium | Ti (wt%) | 0.220 | 0.077 | 0.119 | 1.017 |
| Zinc | Zn (ppm) | 40.447 | 12.501 | 15.049 | 125.741 |