| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.598 | 1.093 | 2.938 | 7.036 |
| Arsenic | As (ppm) | 1.133 | 0.333 | 0.314 | 1.723 |
| Calcium | Ca (wt%) | 0.414 | 0.089 | 0.194 | 0.616 |
| Copper | Cu (ppm) | 17.246 | 2.150 | 13.086 | 24.905 |
| Iron | Fe (wt%) | 3.356 | 0.525 | 2.516 | 4.979 |
| Mercury | Hg (ppm) | 0.070 | 0.049 | 0.032 | 0.267 |
| Magnesium | Mg (wt%) | 0.405 | 0.091 | 0.254 | 0.598 |
| Manganese | Mn (ppm) | 549.418 | 83.727 | 356.794 | 776.131 |
| Sodium | Na (wt%) | 0.294 | 0.092 | 0.121 | 0.618 |
| Phosphorus | P (wt%) | 0.039 | 0.010 | 0.004 | 0.060 |
| Lead | Pb (ppm) | 22.579 | 7.511 | 2.440 | 42.093 |
| Selenium | Se (ppm) | 0.211 | 0.064 | 0.102 | 0.398 |
| Titanium | Ti (wt%) | 0.738 | 0.098 | 0.456 | 1.095 |
| Zinc | Zn (ppm) | 58.248 | 11.783 | 36.342 | 82.810 |