| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.077 | 0.509 | 3.623 | 6.123 |
| Arsenic | As (ppm) | 1.632 | 0.592 | 0.805 | 5.293 |
| Calcium | Ca (wt%) | 1.660 | 0.565 | 0.579 | 3.215 |
| Copper | Cu (ppm) | 9.908 | 2.009 | 5.833 | 23.608 |
| Iron | Fe (wt%) | 2.492 | 0.503 | 1.016 | 5.629 |
| Mercury | Hg (ppm) | 0.030 | 0.012 | 0.011 | 0.127 |
| Magnesium | Mg (wt%) | 0.733 | 0.284 | 0.296 | 1.779 |
| Manganese | Mn (ppm) | 778.840 | 143.806 | 428.016 | 1620.010 |
| Sodium | Na (wt%) | 1.583 | 0.226 | 0.990 | 2.156 |
| Phosphorus | P (wt%) | 0.055 | 0.007 | 0.035 | 0.077 |
| Lead | Pb (ppm) | 26.763 | 3.325 | 17.430 | 35.437 |
| Selenium | Se (ppm) | 0.132 | 0.030 | 0.100 | 0.295 |
| Titanium | Ti (wt%) | 0.687 | 0.078 | 0.451 | 1.144 |
| Zinc | Zn (ppm) | 46.505 | 13.428 | 19.517 | 176.072 |