| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.085 | 0.281 | 4.313 | 6.043 |
| Arsenic | As (ppm) | 4.436 | 0.466 | 2.364 | 4.951 |
| Calcium | Ca (wt%) | 2.144 | 0.710 | 1.156 | 5.038 |
| Copper | Cu (ppm) | 12.707 | 3.113 | 6.188 | 23.472 |
| Iron | Fe (wt%) | 2.258 | 0.155 | 1.796 | 2.611 |
| Mercury | Hg (ppm) | 0.012 | 0.002 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.895 | 0.143 | 0.604 | 1.422 |
| Manganese | Mn (ppm) | 426.410 | 64.819 | 280.199 | 621.145 |
| Sodium | Na (wt%) | 0.958 | 0.053 | 0.799 | 1.068 |
| Phosphorus | P (wt%) | 0.082 | 0.004 | 0.066 | 0.089 |
| Lead | Pb (ppm) | 19.107 | 1.964 | 13.282 | 22.908 |
| Selenium | Se (ppm) | 0.138 | 0.037 | 0.100 | 0.295 |
| Titanium | Ti (wt%) | 0.293 | 0.029 | 0.219 | 0.394 |
| Zinc | Zn (ppm) | 62.952 | 4.950 | 51.620 | 82.181 |