| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.176 | 0.558 | 3.017 | 5.548 |
| Arsenic | As (ppm) | 4.875 | 1.396 | 1.326 | 7.680 |
| Calcium | Ca (wt%) | 2.276 | 1.032 | 0.393 | 5.369 |
| Copper | Cu (ppm) | 11.601 | 3.562 | 5.049 | 21.767 |
| Iron | Fe (wt%) | 1.521 | 0.396 | 0.677 | 2.354 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 1.035 | 0.487 | 0.168 | 2.246 |
| Manganese | Mn (ppm) | 341.493 | 98.632 | 129.453 | 589.981 |
| Sodium | Na (wt%) | 0.807 | 0.158 | 0.403 | 1.082 |
| Phosphorus | P (wt%) | 0.038 | 0.012 | 0.015 | 0.061 |
| Lead | Pb (ppm) | 22.078 | 3.176 | 11.412 | 29.938 |
| Selenium | Se (ppm) | 0.282 | 0.169 | 0.100 | 0.795 |
| Titanium | Ti (wt%) | 0.217 | 0.039 | 0.145 | 0.298 |
| Zinc | Zn (ppm) | 29.494 | 8.777 | 14.128 | 48.682 |