| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.294 | 0.763 | 1.002 | 5.849 |
| Arsenic | As (ppm) | 5.114 | 1.949 | 1.775 | 14.558 |
| Calcium | Ca (wt%) | 1.176 | 1.734 | 0.020 | 13.153 |
| Copper | Cu (ppm) | 7.505 | 2.324 | 1.666 | 16.443 |
| Iron | Fe (wt%) | 1.537 | 0.394 | 0.629 | 2.976 |
| Mercury | Hg (ppm) | 0.059 | 0.020 | 0.020 | 0.160 |
| Magnesium | Mg (wt%) | 0.117 | 0.047 | 0.036 | 0.313 |
| Manganese | Mn (ppm) | 426.972 | 134.241 | 153.900 | 971.214 |
| Sodium | Na (wt%) | 0.081 | 0.030 | 0.023 | 0.229 |
| Phosphorus | P (wt%) | 0.035 | 0.015 | 0.006 | 0.077 |
| Lead | Pb (ppm) | 17.247 | 3.685 | 8.833 | 35.849 |
| Selenium | Se (ppm) | 0.309 | 0.131 | 0.104 | 0.773 |
| Titanium | Ti (wt%) | 0.556 | 0.069 | 0.377 | 0.765 |
| Zinc | Zn (ppm) | 33.594 | 10.556 | 13.948 | 86.739 |