| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.178 | 0.350 | 2.504 | 3.953 |
| Arsenic | As (ppm) | 9.664 | 4.306 | 4.828 | 28.739 |
| Calcium | Ca (wt%) | 2.596 | 0.561 | 1.321 | 3.567 |
| Copper | Cu (ppm) | 7.961 | 1.593 | 5.067 | 11.463 |
| Iron | Fe (wt%) | 3.171 | 0.783 | 2.139 | 6.914 |
| Mercury | Hg (ppm) | 0.040 | 0.010 | 0.020 | 0.059 |
| Magnesium | Mg (wt%) | 0.367 | 0.113 | 0.229 | 0.889 |
| Manganese | Mn (ppm) | 1851.250 | 499.026 | 838.976 | 3939.160 |
| Sodium | Na (wt%) | 0.198 | 0.039 | 0.124 | 0.357 |
| Phosphorus | P (wt%) | 0.598 | 0.227 | 0.223 | 1.044 |
| Lead | Pb (ppm) | 21.026 | 2.498 | 15.265 | 30.858 |
| Selenium | Se (ppm) | 0.267 | 0.058 | 0.105 | 0.394 |
| Titanium | Ti (wt%) | 0.195 | 0.034 | 0.139 | 0.291 |
| Zinc | Zn (ppm) | 52.669 | 11.893 | 30.797 | 80.854 |