| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.792 | 0.953 | 1.072 | 7.701 |
| Arsenic | As (ppm) | 5.061 | 1.896 | 2.068 | 18.106 |
| Calcium | Ca (wt%) | 16.960 | 4.723 | 3.621 | 27.904 |
| Copper | Cu (ppm) | 10.538 | 1.930 | 7.003 | 18.938 |
| Iron | Fe (wt%) | 1.351 | 0.582 | 0.572 | 3.586 |
| Mercury | Hg (ppm) | 0.013 | 0.002 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.908 | 0.368 | 0.362 | 3.480 |
| Manganese | Mn (ppm) | 379.171 | 140.361 | 181.325 | 787.965 |
| Sodium | Na (wt%) | 0.194 | 0.220 | 0.036 | 1.570 |
| Phosphorus | P (wt%) | 0.044 | 0.037 | 0.013 | 0.311 |
| Lead | Pb (ppm) | 9.619 | 2.930 | 2.009 | 20.319 |
| Selenium | Se (ppm) | 0.359 | 0.168 | 0.100 | 1.095 |
| Titanium | Ti (wt%) | 0.198 | 0.094 | 0.068 | 0.608 |
| Zinc | Zn (ppm) | 30.671 | 10.703 | 11.882 | 74.390 |