| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.399 | 0.677 | 0.937 | 4.595 |
| Arsenic | As (ppm) | 5.491 | 1.689 | 2.045 | 15.834 |
| Calcium | Ca (wt%) | 0.362 | 0.260 | 0.089 | 2.398 |
| Copper | Cu (ppm) | 6.152 | 2.266 | 3.037 | 24.680 |
| Iron | Fe (wt%) | 1.412 | 0.340 | 0.611 | 2.531 |
| Mercury | Hg (ppm) | 0.030 | 0.011 | 0.010 | 0.061 |
| Magnesium | Mg (wt%) | 0.125 | 0.034 | 0.052 | 0.253 |
| Manganese | Mn (ppm) | 484.966 | 232.318 | 133.589 | 1737.030 |
| Sodium | Na (wt%) | 0.043 | 0.012 | 0.009 | 0.082 |
| Phosphorus | P (wt%) | 0.022 | 0.008 | 0.007 | 0.056 |
| Lead | Pb (ppm) | 19.580 | 12.797 | 7.133 | 139.164 |
| Selenium | Se (ppm) | 0.197 | 0.054 | 0.100 | 0.338 |
| Titanium | Ti (wt%) | 0.268 | 0.067 | 0.129 | 0.496 |
| Zinc | Zn (ppm) | 47.644 | 20.219 | 17.352 | 131.068 |