| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.799 | 0.306 | 6.879 | 8.284 |
| Arsenic | As (ppm) | 7.872 | 1.750 | 4.302 | 12.916 |
| Calcium | Ca (wt%) | 1.123 | 0.234 | 0.594 | 1.632 |
| Copper | Cu (ppm) | 28.422 | 8.804 | 10.137 | 48.176 |
| Iron | Fe (wt%) | 5.469 | 0.906 | 4.073 | 8.417 |
| Mercury | Hg (ppm) | 0.046 | 0.016 | 0.022 | 0.100 |
| Magnesium | Mg (wt%) | 0.901 | 0.080 | 0.712 | 1.046 |
| Manganese | Mn (ppm) | 712.087 | 130.767 | 456.440 | 1043.850 |
| Sodium | Na (wt%) | 1.181 | 0.268 | 0.734 | 1.903 |
| Phosphorus | P (wt%) | 0.075 | 0.009 | 0.046 | 0.107 |
| Lead | Pb (ppm) | 9.581 | 1.812 | 5.581 | 13.352 |
| Selenium | Se (ppm) | 0.444 | 0.208 | 0.133 | 1.142 |
| Titanium | Ti (wt%) | 0.741 | 0.195 | 0.445 | 1.228 |
| Zinc | Zn (ppm) | 90.354 | 10.038 | 69.056 | 120.777 |