| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.361 | 0.377 | 1.386 | 3.085 |
| Arsenic | As (ppm) | 1.518 | 0.387 | 0.395 | 2.498 |
| Calcium | Ca (wt%) | 0.252 | 0.159 | 0.066 | 0.860 |
| Copper | Cu (ppm) | 5.831 | 1.435 | 1.545 | 10.574 |
| Iron | Fe (wt%) | 3.024 | 1.808 | 0.787 | 11.921 |
| Mercury | Hg (ppm) | 0.022 | 0.004 | 0.011 | 0.030 |
| Magnesium | Mg (wt%) | 0.057 | 0.026 | 0.029 | 0.161 |
| Manganese | Mn (ppm) | 567.690 | 186.185 | 222.901 | 1241.820 |
| Sodium | Na (wt%) | 0.293 | 0.095 | 0.068 | 0.519 |
| Phosphorus | P (wt%) | 0.033 | 0.012 | 0.012 | 0.080 |
| Lead | Pb (ppm) | 23.984 | 4.309 | 17.749 | 39.502 |
| Selenium | Se (ppm) | 0.149 | 0.037 | 0.101 | 0.280 |
| Titanium | Ti (wt%) | 0.574 | 0.139 | 0.203 | 1.115 |
| Zinc | Zn (ppm) | 31.074 | 8.418 | 10.671 | 58.348 |