| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.379 | 0.268 | 5.091 | 6.126 |
| Arsenic | As (ppm) | 7.104 | 0.645 | 6.244 | 8.840 |
| Calcium | Ca (wt%) | 0.680 | 0.016 | 0.657 | 0.721 |
| Copper | Cu (ppm) | 21.220 | 6.134 | 12.026 | 30.939 |
| Iron | Fe (wt%) | 1.978 | 0.305 | 1.561 | 2.557 |
| Mercury | Hg (ppm) | 0.076 | 0.025 | 0.038 | 0.102 |
| Magnesium | Mg (wt%) | 0.697 | 0.037 | 0.650 | 0.807 |
| Manganese | Mn (ppm) | 236.725 | 43.205 | 171.344 | 318.521 |
| Sodium | Na (wt%) | 0.672 | 0.187 | 0.456 | 0.952 |
| Phosphorus | P (wt%) | 0.043 | 0.007 | 0.035 | 0.057 |
| Lead | Pb (ppm) | 50.725 | 22.491 | 16.352 | 75.609 |
| Selenium | Se (ppm) | 0.757 | 0.157 | 0.515 | 0.959 |
| Titanium | Ti (wt%) | 0.235 | 0.011 | 0.221 | 0.263 |
| Zinc | Zn (ppm) | 62.341 | 13.832 | 44.886 | 94.273 |