| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.917 | 0.374 | 4.216 | 5.977 |
| Arsenic | As (ppm) | 5.701 | 0.936 | 3.980 | 8.262 |
| Calcium | Ca (wt%) | 2.461 | 0.532 | 0.801 | 4.471 |
| Copper | Cu (ppm) | 13.495 | 1.919 | 8.284 | 19.347 |
| Iron | Fe (wt%) | 2.042 | 0.212 | 1.547 | 2.607 |
| Mercury | Hg (ppm) | 0.011 | 0.001 | 0.010 | 0.017 |
| Magnesium | Mg (wt%) | 1.120 | 0.213 | 0.845 | 2.922 |
| Manganese | Mn (ppm) | 531.341 | 126.169 | 353.214 | 845.964 |
| Sodium | Na (wt%) | 0.706 | 0.115 | 0.525 | 0.989 |
| Phosphorus | P (wt%) | 0.044 | 0.003 | 0.033 | 0.057 |
| Lead | Pb (ppm) | 19.509 | 3.978 | 10.171 | 28.694 |
| Selenium | Se (ppm) | 0.381 | 0.156 | 0.101 | 0.945 |
| Titanium | Ti (wt%) | 0.252 | 0.020 | 0.206 | 0.298 |
| Zinc | Zn (ppm) | 44.147 | 5.824 | 31.011 | 54.368 |