| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.114 | 0.604 | 0.758 | 3.931 |
| Arsenic | As (ppm) | 3.319 | 0.921 | 1.311 | 6.338 |
| Calcium | Ca (wt%) | 0.366 | 0.505 | 0.038 | 3.239 |
| Copper | Cu (ppm) | 5.699 | 1.356 | 3.155 | 11.501 |
| Iron | Fe (wt%) | 1.122 | 0.285 | 0.448 | 1.810 |
| Mercury | Hg (ppm) | 0.018 | 0.006 | 0.010 | 0.048 |
| Magnesium | Mg (wt%) | 0.152 | 0.050 | 0.040 | 0.315 |
| Manganese | Mn (ppm) | 322.357 | 125.144 | 101.642 | 832.502 |
| Sodium | Na (wt%) | 0.247 | 0.140 | 0.052 | 0.712 |
| Phosphorus | P (wt%) | 0.017 | 0.005 | 0.006 | 0.032 |
| Lead | Pb (ppm) | 12.421 | 3.150 | 4.175 | 23.112 |
| Selenium | Se (ppm) | 0.242 | 0.051 | 0.100 | 0.400 |
| Titanium | Ti (wt%) | 0.149 | 0.026 | 0.079 | 0.218 |
| Zinc | Zn (ppm) | 24.535 | 6.975 | 7.632 | 42.714 |