| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.729 | 0.212 | 0.236 | 1.435 |
| Arsenic | As (ppm) | 1.848 | 0.669 | 0.552 | 4.989 |
| Calcium | Ca (wt%) | 0.031 | 0.009 | 0.005 | 0.054 |
| Copper | Cu (ppm) | 4.097 | 0.765 | 1.344 | 6.314 |
| Iron | Fe (wt%) | 0.375 | 0.118 | 0.155 | 0.697 |
| Mercury | Hg (ppm) | 0.035 | 0.009 | 0.013 | 0.085 |
| Magnesium | Mg (wt%) | 0.019 | 0.005 | 0.007 | 0.038 |
| Manganese | Mn (ppm) | 99.690 | 37.485 | 26.675 | 258.068 |
| Sodium | Na (wt%) | 0.009 | 0.002 | 0.003 | 0.015 |
| Phosphorus | P (wt%) | 0.025 | 0.009 | 0.008 | 0.062 |
| Lead | Pb (ppm) | 10.848 | 3.494 | 3.337 | 29.462 |
| Selenium | Se (ppm) | 0.140 | 0.026 | 0.101 | 0.238 |
| Titanium | Ti (wt%) | 0.453 | 0.069 | 0.294 | 0.629 |
| Zinc | Zn (ppm) | 29.424 | 27.704 | 4.523 | 243.907 |