| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.067 | 0.602 | 3.247 | 6.124 |
| Arsenic | As (ppm) | 10.181 | 2.247 | 5.677 | 16.386 |
| Calcium | Ca (wt%) | 0.296 | 0.197 | 0.078 | 1.434 |
| Copper | Cu (ppm) | 21.333 | 4.533 | 11.266 | 34.289 |
| Iron | Fe (wt%) | 3.913 | 0.715 | 2.173 | 5.408 |
| Mercury | Hg (ppm) | 0.071 | 0.076 | 0.034 | 0.445 |
| Magnesium | Mg (wt%) | 0.349 | 0.085 | 0.180 | 0.594 |
| Manganese | Mn (ppm) | 1896.060 | 1238.070 | 626.055 | 6633.460 |
| Sodium | Na (wt%) | 0.263 | 0.131 | 0.073 | 0.586 |
| Phosphorus | P (wt%) | 0.057 | 0.010 | 0.027 | 0.076 |
| Lead | Pb (ppm) | 36.021 | 15.301 | 20.341 | 126.650 |
| Selenium | Se (ppm) | 0.669 | 0.138 | 0.342 | 0.996 |
| Titanium | Ti (wt%) | 0.324 | 0.027 | 0.245 | 0.369 |
| Zinc | Zn (ppm) | 153.149 | 57.557 | 82.258 | 317.140 |